[移动开发] Android测试

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[移动开发]Android测试

Android期末考试即将来袭，我主要把平时的一些小测试的代码放在这里，仅供大家参考！

文章目录

第一题加法计算器

实现代码

import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class calculator extends AppCompatActivity {
    EditText n1,n2,n3;
    Button btn;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login);

        ///获取xml中的id
        n1=findViewById(R.id.n1);
        n2=findViewById(R.id.n2);
        n3=findViewById(R.id.n3);
        btn=findViewById(R.id.btn);

        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                // 要判断字符串是否为空
                String x = n1.getText().toString();
                String y = n2.getText().toString();
                if (!x.equals("")&& !y.equals("")){
                    int num1 = Integer.parseInt(x);
                    int num2 = Integer.parseInt(y);
                    int num3 = num1+num2;
                    n3.setText(String.valueOf(num3));
                    Toast.makeText(calculator.this,"计算成功", Toast.LENGTH_LONG).show();
                }else {
                    Toast.makeText(calculator.this,"输入不能为空", Toast.LENGTH_LONG).show();
                }
            }
        });
    }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".calculator">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="加法计算器"
            android:textSize="30sp"
            android:layout_gravity="center_horizontal"
            android:textColor="#000000"></TextView>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:background="#43DCEF">
        <EditText
            android:id="@+id/n1"
            android:textSize="25sp"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"></EditText>
        <TextView
            android:layout_width="10dp"
            android:layout_height="wrap_content"
            android:text="+"></TextView>
        <EditText
            android:id="@+id/n2"
            android:textSize="25sp"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"></EditText>
        <Button
            android:id="@+id/btn"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="="
            android:textSize="15sp"></Button>
        <EditText
            android:id="@+id/n3"
            android:textSize="25sp"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1">
        </EditText>
    </LinearLayout>
</LinearLayout>

显示结果

在这里插入图片描述

第二题图书信息管理系统

注意：Android Studio安装中文输入法
参考链接：Android studio自带模拟器使用中文拼音输入法

介绍

图书信息管理系统主要分为三个模块，分别是首页、搜索、我的。首页主要展示数据库中图书信息的展示，修改图书信息、删除图书信息；搜索主要实现图书名查询相关信息，添加新的图书；我的主要展示作者的相关信息。

效果图展示

在这里插入图片描述

布局实现代码

由于头部和底部的实现都是一样的，我们把它写在单独的文件中，需要的时候引入即可。其中，对应的图片之间粘贴到res目录下的mipmap目录下即可。

头部引入布局文件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="#C8C5C5">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="图书信息管理"
            android:textSize="30sp"
            android:layout_gravity="center_horizontal"
            android:textColor="#ffffff">
        </TextView>
</LinearLayout>

尾部引入布局文件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="#09A2E8"
    android:orientation="horizontal">
    <LinearLayout
        android:id="@+id/layout_home"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:orientation="vertical"
        android:gravity="center_horizontal">
        <ImageView
            android:id="@+id/img_home"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@mipmap/home1"></ImageView>
        <TextView
            android:id="@+id/tv_index"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="首页"
            android:textColor="#ffffff"
            android:textSize="20sp"></TextView>
    </LinearLayout>
    <LinearLayout
        android:id="@+id/layout_search"
        android:gravity="center_horizontal"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:orientation="vertical">
        <ImageView
            android:id="@+id/img_search"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@mipmap/search1"></ImageView>
        <TextView
            android:id="@+id/tv_search"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="搜索"
            android:textColor="#ffffff"
            android:textSize="20sp"></TextView>
    </LinearLayout>
    <LinearLayout
        android:id="@+id/layout_my"
        android:gravity="center_horizontal"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:orientation="vertical">
        <ImageView
            android:id="@+id/img_my"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@mipmap/my1"></ImageView>
        <TextView
            android:id="@+id/tv_my"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="我的"
            android:textColor="#ffffff"
            android:textSize="20sp"></TextView>
    </LinearLayout>
</LinearLayout>

帧布局

由于中间的内容是变换的，我们采用帧布局的方式动态显示数据。

整体界面布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".book"
    android:orientation="vertical">
    <include layout="@layout/top"></include>    <!--引入头部布局文件xml-->
    <!--帧布局-->
    <FrameLayout
        android:id="@+id/frame"
        android:layout_width="match_parent"
        android:layout_weight="1"
        android:layout_height="0dp">
    </FrameLayout>
    <include layout="@layout/buttom"></include>    <!--引入尾部布局文件xml-->
</LinearLayout>

首页帧布局

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".HomeFragment"
    android:id="@+id/home_fragment">
    <ListView
        android:id="@+id/lv"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"></ListView>
</FrameLayout>

搜索页面帧布局

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".SearchFragment">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal"
            android:padding="10dp">
            <EditText
                android:id="@+id/edt_bname"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_weight="2"
                android:layout_marginLeft="10dp"
                android:hint="请输入图书名"
                android:textColorHint="#D31E1E"
                android:textSize="25sp"></EditText>
            <Button
                android:id="@+id/btn_search"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:layout_marginLeft="10dp"
                android:text="查询"
                android:textSize="20sp"></Button>
            <Button
                android:id="@+id/btn_add"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:layout_marginLeft="10dp"
                android:text="添加"
                android:textSize="20sp"></Button>
        </LinearLayout>
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent">
            <ListView
                android:id="@+id/search_lv"
                android:layout_width="match_parent"
                android:layout_height="wrap_content">
            </ListView>
        </LinearLayout>
    </LinearLayout>
</FrameLayout>

我的页面帧布局

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="10dp"
    tools:context=".MyFragment">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">
        <ImageView
            android:id="@+id/img_person"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_horizontal"
            android:src="@mipmap/person"
            ></ImageView>
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal"
            android:padding="10dp">
            <TextView
                android:layout_width="0dp"
                android:layout_weight="1"
                android:layout_height="match_parent"
                android:textSize="25sp"
                android:textStyle="bold"
                android:text="姓名："
                ></TextView>
            <TextView
                android:layout_width="0dp"
                android:layout_weight="2"
                android:layout_height="match_parent"
                android:textSize="25sp"
                android:textStyle="bold"
                android:text="张三"
                ></TextView>
        </LinearLayout>
        <!--下划线-->
        <SurfaceView
            android:layout_width="match_parent"
            android:layout_height="1dp"
            android:background="#5A349E"></SurfaceView>
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal"
            android:padding="10dp">
            <TextView
                android:layout_width="0dp"
                android:layout_weight="1"
                android:layout_height="match_parent"
                android:textSize="25sp"
                android:textStyle="bold"
                android:text="密码："
                ></TextView>
            <TextView
                android:layout_width="0dp"
                android:layout_weight="2"
                android:layout_height="match_parent"
                android:textSize="25sp"
                android:textStyle="bold"
                android:text="123456"
                ></TextView>
        </LinearLayout>

        <SurfaceView
            android:layout_width="match_parent"
            android:layout_height="1dp"
            android:background="#5C06F6"></SurfaceView>
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal"
            android:padding="10dp">
            <TextView
                android:layout_width="0dp"
                android:layout_weight="1"
                android:layout_height="match_parent"
                android:textSize="25sp"
                android:textStyle="bold"
                android:text="邮箱："
                ></TextView>
            <TextView
                android:layout_width="0dp"
                android:layout_weight="2"
                android:layout_height="match_parent"
                android:textSize="25sp"
                android:textStyle="bold"
                android:text="zhangsan@qq.com"
                ></TextView>
        </LinearLayout>

        <SurfaceView
            android:layout_width="match_parent"
            android:layout_height="1dp"
            android:background="#5C06F6"></SurfaceView>
    </LinearLayout>
</FrameLayout>

首页数据显示的线性布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal" android:layout_width="match_parent"
    android:layout_height="match_parent">
    <TextView
        android:id="@+id/tv_bid"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:textSize="20sp"></TextView>
    <TextView
        android:id="@+id/tv_bname"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:textSize="20sp"></TextView>
    <TextView
        android:id="@+id/tv_press"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:textSize="20sp"></TextView>
    <TextView
        android:id="@+id/tv_price"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:textSize="20sp"></TextView>
</LinearLayout>

添加图书弹出框布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <TextView
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content"
            android:textSize="25sp"
            android:text="书名"></TextView>
        <EditText
            android:id="@+id/add_edt_bname"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="2"
            android:hint="ss"></EditText>
    </LinearLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <TextView
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content"
            android:textSize="25sp"
            android:text="书的信息"></TextView>
        <EditText
            android:id="@+id/add_edt_press"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="2"
            android:hint="ss"></EditText>
    </LinearLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <TextView
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content"
            android:textSize="25sp"
            android:text="书的价格"></TextView>
        <EditText
            android:id="@+id/add_edt_price"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="2"
            android:hint="ss"></EditText>
    </LinearLayout>
</LinearLayout>

修改图书弹出框布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <TextView
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content"
            android:textSize="25sp"
            android:text="主键"></TextView>
        <EditText
            android:id="@+id/xiugai_edt_bid"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="2"
            android:hint="ss"></EditText>
    </LinearLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <TextView
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content"
            android:textSize="25sp"
            android:text="名称"></TextView>
        <EditText
            android:id="@+id/xiugai_edt_bname"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="2"
            android:hint="ss"></EditText>
    </LinearLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <TextView
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content"
            android:textSize="25sp"
            android:text="信息"></TextView>
        <EditText
            android:id="@+id/xiugai_edt_press"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="2"
            android:hint="ss"></EditText>
    </LinearLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <TextView
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content"
            android:textSize="25sp"
            android:text="价格"></TextView>
        <EditText
            android:id="@+id/xiugai_edt_price"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="2"
            android:hint="ss"></EditText>
    </LinearLayout>
</LinearLayout>

操作实现代码

book类

package cn.itcast.book;

import androidx.appcompat.app.AppCompatActivity;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentManager;
import androidx.fragment.app.FragmentTransaction;

import android.graphics.Color;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;

public class book extends AppCompatActivity implements View.OnClickListener{
    LinearLayout layout_home,layout_search,layout_my;
    ImageView img_home,img_search,img_my;
    TextView tv_home,tv_search,tv_my;
    Fragment homeFragment,searchFragment,myFragment;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_book);

        //获取三个线性布局  底部导航页签外面包裹的线性布局
        layout_home=findViewById(R.id.layout_home);
        layout_search=findViewById(R.id.layout_search);
        layout_my=findViewById(R.id.layout_my);


        img_home = findViewById(R.id.img_home);
        img_search = findViewById(R.id.img_search);
        img_my = findViewById(R.id.img_my);

        tv_home = findViewById(R.id.tv_index);
        tv_search = findViewById(R.id.tv_search);
        tv_my = findViewById(R.id.tv_my);

        //创建Fragment对象，不同的Fragment对象有不同的布局
        homeFragment= new HomeFragment();//首页
        searchFragment= new SearchFragment();
        myFragment= new MyFragment();
        layout_home.setOnClickListener(this);
        layout_search.setOnClickListener(this);
        layout_my.setOnClickListener(this);

        FragmentManager fm = getSupportFragmentManager();//用于切换帧布局
        FragmentTransaction transaction = fm.beginTransaction();
        img_home.setImageResource(R.mipmap.home2);
        tv_home.setTextColor(Color.BLUE);
        transaction.replace(R.id.frame,homeFragment);//后面的切换前面的
        transaction.commit();
    }

    @Override
    public void onClick(View view) {
        tv_home.setTextColor(Color.WHITE);
        img_home.setImageResource(R.mipmap.home1);

        tv_search.setTextColor(Color.WHITE);
        img_search.setImageResource(R.mipmap.search1);

        tv_my.setTextColor(Color.WHITE);
        img_my.setImageResource(R.mipmap.my1);
        
        FragmentManager fm = getSupportFragmentManager();//帧布局管理器，用于获取帧帧事务
        FragmentTransaction fragmentTransaction = fm.beginTransaction(); ///得到事务，用来切换帧布局

        switch (view.getId()){
            case R.id.layout_home:
                tv_home.setTextColor(Color.RED);
                img_home.setImageResource(R.mipmap.home2);//换图片
                //被替换的内容   要替换的内容（使用事务来替换帧布局）
                fragmentTransaction.replace(R.id.frame,homeFragment);
                break;
            case R.id.layout_search:
                tv_search.setTextColor(Color.RED);
                img_search.setImageResource(R.mipmap.search2);//换图片
                fragmentTransaction.replace(R.id.frame,searchFragment);
                break;
            case R.id.layout_my:
                tv_my.setTextColor(Color.RED);
                img_my.setImageResource(R.mipmap.my2);//换图片
                fragmentTransaction.replace(R.id.frame,myFragment);
                break;
        }
        fragmentTransaction.commit();//提交事务
    }
}

HomeFragment

注意

1、我们通过new的方式创建一个空白的fragment类，系统会提供一些方法，我们不用动，直接在onCreateView写我们自己的代码即可。
2、数据库的路径获取自己当前项目的路径，具体步骤为：点击Device File Explorer，找到data下面的data，打开本项目所对应的包名，右键上传数据库文件，点击copy path即可复制路径名，将它粘贴到SQLiteDatabase.openOrCreateDatabase的第一个参数里即可。

package cn.itcast.book;

import android.app.AlertDialog;
import android.content.ContentValues;
import android.content.DialogInterface;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;

import androidx.fragment.app.Fragment;

import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * A simple {@link Fragment} subclass.
 * Use the {@link HomeFragment#newInstance} factory method to
 * create an instance of this fragment.
 */
public class HomeFragment extends Fragment {
    ListView lv;
    String[] from={"bid","bname","press","price"};  //map中的键
    int[] to={R.id.tv_bid,R.id.tv_bname,R.id.tv_press,R.id.tv_price};  //item 中 每一项


    SQLiteDatabase db;//创建数据库对象
    Cursor cursor;

    // TODO: Rename parameter arguments, choose names that match
    // the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
    private static final String ARG_PARAM1 = "param1";
    private static final String ARG_PARAM2 = "param2";

    // TODO: Rename and change types of parameters
    private String mParam1;
    private String mParam2;

    public HomeFragment() {
        // Required empty public constructor
    }

    /**
     * Use this factory method to create a new instance of
     * this fragment using the provided parameters.
     *
     * @param param1 Parameter 1.
     * @param param2 Parameter 2.
     * @return A new instance of fragment HomeFragment.
     */
    // TODO: Rename and change types and number of parameters
    public static HomeFragment newInstance(String param1, String param2) {
        HomeFragment fragment = new HomeFragment();
        Bundle args = new Bundle();
        args.putString(ARG_PARAM1, param1);
        args.putString(ARG_PARAM2, param2);
        fragment.setArguments(args);
        return fragment;
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if (getArguments() != null) {
            mParam1 = getArguments().getString(ARG_PARAM1);
            mParam2 = getArguments().getString(ARG_PARAM2);
        }
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        db=SQLiteDatabase.openOrCreateDatabase("/data/data/cn.itcast.book/bookdb.db",null);//得到数据库

        //        inflater    可以加载布局文件
        View view = inflater.inflate(R.layout.fragment_home, container, false);
        lv =view.findViewById(R.id.lv);

        SimpleAdapter adapter = new SimpleAdapter(getContext(),getdata(),R.layout.item,from,to);
        /*
         *   上下文获取的数据布局
         * */
        lv.setAdapter(adapter);//绑定数据

        lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
                //view 代表点击的某一行
                //i  代表这一行在数据库中的坐标
                TextView tv_bid = view.findViewById(R.id.tv_bid);
                TextView tv_bname = view.findViewById(R.id.tv_bname);
                TextView tv_press = view.findViewById(R.id.tv_press);
                TextView tv_price = view.findViewById(R.id.tv_price);

                AlertDialog.Builder dialog = new AlertDialog.Builder(getContext());
                dialog.setTitle("图书修改");

                //创建对话框布局文件  获取布局文件对应的视图
                LayoutInflater layoutInflater = LayoutInflater.from(getContext());

                View bookview = layoutInflater.inflate(R.layout.book_dialog, null);

                final EditText xiugai_edt_bid = bookview.findViewById(R.id.xiugai_edt_bid);
                final EditText xiugai_edt_bname = bookview.findViewById(R.id.xiugai_edt_bname);
                final EditText xiugai_edt_press = bookview.findViewById(R.id.xiugai_edt_press);
                final EditText xiugai_edt_price = bookview.findViewById(R.id.xiugai_edt_price);

                cursor.moveToPosition(i);
                xiugai_edt_bid.setText(cursor.getInt(0)+"");
                xiugai_edt_bname.setText(cursor.getString(1)+"");
                xiugai_edt_press.setText(cursor.getString(2)+"");
                xiugai_edt_price.setText(cursor.getInt(3)+"");

                dialog.setView(bookview);//设置对话框的布局
                dialog.setPositiveButton("保存", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {
                        ContentValues cv = new ContentValues();
                        cv.put("bname",xiugai_edt_bname.getText().toString());
                        cv.put("info",xiugai_edt_press.getText().toString());
                        cv.put("price",xiugai_edt_price.getText().toString());

                        int n = db.update("book", cv, "bid=?", new String[]{xiugai_edt_bid.getText().toString()});
                        //更新之后  重新显示
                        if (n>0){
                            SimpleAdapter simpleAdapter = new SimpleAdapter(getContext(),getdata(),R.layout.item,from,to);
                            lv.setAdapter(simpleAdapter);
                            Toast.makeText(getContext(),"图书修改成功",Toast.LENGTH_LONG).show();
                        }
                    }
                });
                dialog.setNegativeButton("取消", null);
                dialog.setNegativeButton("删除", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {
                        int n = db.delete("book","bid=?", new String[]{xiugai_edt_bid.getText().toString()});

                        if (n>0){
                            SimpleAdapter simpleAdapter = new SimpleAdapter(getContext(),getdata(),R.layout.item,from,to);
                            lv.setAdapter(simpleAdapter);
                            Toast.makeText(getContext(),"图书删除成功",Toast.LENGTH_LONG).show();
                        }
                    }
                });
                dialog.show();
            }
        });
        return view ;
    }
    public List<Map<String,Object>> getdata(){
        List<Map<String,Object>> list = new ArrayList<>();
        cursor = db.query("book", null, null, null, null, null, null, null);
        while (cursor.moveToNext()){
            HashMap<String, Object> map = new HashMap<>();
            //获取数据
            int bid = cursor.getInt(0);
            String bname = cursor.getString(1);
            String press = cursor.getString(2);
            int price = cursor.getInt(3);

            map.put("bid",bid);
            map.put("bname",bname);
            map.put("press",press);
            map.put("price",price);

            list.add(map);
        }
        return list;
    }
}

MyFragment

package cn.itcast.book;

import android.os.Bundle;

import androidx.fragment.app.Fragment;

import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

/**
 * A simple {@link Fragment} subclass.
 * Use the {@link MyFragment#newInstance} factory method to
 * create an instance of this fragment.
 */
public class MyFragment extends Fragment {

    // TODO: Rename parameter arguments, choose names that match
    // the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
    private static final String ARG_PARAM1 = "param1";
    private static final String ARG_PARAM2 = "param2";

    // TODO: Rename and change types of parameters
    private String mParam1;
    private String mParam2;

    public MyFragment() {
        // Required empty public constructor
    }

    /**
     * Use this factory method to create a new instance of
     * this fragment using the provided parameters.
     *
     * @param param1 Parameter 1.
     * @param param2 Parameter 2.
     * @return A new instance of fragment MyFragment.
     */
    // TODO: Rename and change types and number of parameters
    public static MyFragment newInstance(String param1, String param2) {
        MyFragment fragment = new MyFragment();
        Bundle args = new Bundle();
        args.putString(ARG_PARAM1, param1);
        args.putString(ARG_PARAM2, param2);
        fragment.setArguments(args);
        return fragment;
    }
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if (getArguments() != null) {
            mParam1 = getArguments().getString(ARG_PARAM1);
            mParam2 = getArguments().getString(ARG_PARAM2);
        }
    }
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        return inflater.inflate(R.layout.fragment_my, container, false);
    }
}

SearchFragment

package cn.itcast.book;

import android.app.AlertDialog;
import android.content.ContentValues;
import android.content.DialogInterface;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;

import androidx.fragment.app.Fragment;

import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * A simple {@link Fragment} subclass.
 * Use the {@link SearchFragment#newInstance} factory method to
 * create an instance of this fragment.
 */
public class SearchFragment extends Fragment {
    EditText edt_bname;
    Button btn_search,btn_add;
    ListView search_lv;
    String[] from={"bid","bname","press","price"};  //map中的键
    SQLiteDatabase db;
    Cursor cursor;

    int[] to={R.id.tv_bid,R.id.tv_bname,R.id.tv_press,R.id.tv_price};

    // TODO: Rename parameter arguments, choose names that match
    // the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
    private static final String ARG_PARAM1 = "param1";
    private static final String ARG_PARAM2 = "param2";

    // TODO: Rename and change types of parameters
    private String mParam1;
    private String mParam2;

    public SearchFragment() {
        // Required empty public constructor
    }

    /**
     * Use this factory method to create a new instance of
     * this fragment using the provided parameters.
     *
     * @param param1 Parameter 1.
     * @param param2 Parameter 2.
     * @return A new instance of fragment SearchFragment.
     */
    // TODO: Rename and change types and number of parameters
    public static SearchFragment newInstance(String param1, String param2) {
        SearchFragment fragment = new SearchFragment();
        Bundle args = new Bundle();
        args.putString(ARG_PARAM1, param1);
        args.putString(ARG_PARAM2, param2);
        fragment.setArguments(args);
        return fragment;
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if (getArguments() != null) {
            mParam1 = getArguments().getString(ARG_PARAM1);
            mParam2 = getArguments().getString(ARG_PARAM2);
        }
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        //        inflater    可以加载布局文件
        View view = inflater.inflate(R.layout.fragment_search, null);


        search_lv =view.findViewById(R.id.search_lv);
        
        db=SQLiteDatabase.openOrCreateDatabase("/data/data/cn.itcast.book/bookdb.db",null);//得到数据库

        edt_bname = view.findViewById(R.id.edt_bname);
        btn_search=view.findViewById(R.id.btn_search);
        btn_add=view.findViewById(R.id.btn_add);

        btn_search.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                String bname = edt_bname.getText().toString();
                SimpleAdapter adapter = new SimpleAdapter(getContext(),getByBookName(bname),R.layout.item,from,to);
                search_lv.setAdapter(adapter);
            }
        });

        btn_add.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                AlertDialog.Builder dialog = new AlertDialog.Builder(getContext());
                dialog.setTitle("添加图书");
                LayoutInflater layoutInflater = LayoutInflater.from(getContext());
                View add_view = layoutInflater.inflate(R.layout.add_book_dialog, null);

                final EditText edt_bname = add_view.findViewById(R.id.add_edt_bname);
                final EditText edt_press = add_view.findViewById(R.id.add_edt_press);
                final EditText edt_price = add_view.findViewById(R.id.add_edt_price);

                dialog.setView(add_view);
                dialog.setPositiveButton("添加", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {
                        ContentValues cv = new ContentValues();
                        cv.put("bname",edt_bname.getText().toString());
                        cv.put("info",edt_press.getText().toString());
                        cv.put("price",edt_price.getText().toString());

                        long n = db.insert("book", null, cv);
                        if (n>0){
                            Toast.makeText(getContext(),"图书添加成功",Toast.LENGTH_LONG).show();
                        }
                    }
                });
                dialog.setNegativeButton("取消", null);
                dialog.show();
            }
        });

        // Inflate the layout for this fragment
        return view;
    }
    public List<Map<String,Object>> getByBookName(String bookName){
        List<Map<String,Object>> list = new ArrayList<>();
        cursor = db.query("book", null, "bname=?", new String[]{bookName}, null, null, null, null);
        while (cursor.moveToNext()){
            HashMap<String, Object> map = new HashMap<>();
            //获取数据
            int bid = cursor.getInt(0);
            String bname = cursor.getString(1);
            String press = cursor.getString(2);
            int price = cursor.getInt(3);

            map.put("bid",bid);
            map.put("bname",bname);
            map.put("press",press);
            map.put("price",price);

            list.add(map);
        }
        return list;
    }
}

第三题实现如图所示界面

在这里插入图片描述

MainActivity 类

import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
}

布局文件

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity"
    android:orientation="vertical"
    android:background="@mipmap/bg">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:layout_alignParentBottom="true">
        <Button
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="动态"
            android:textSize="25sp"
            android:background="#000000"
            android:textColor="#ffffff"></Button>
        <Button
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="通讯录"
            android:textSize="20dp"
            android:background="#000000"
            android:textColor="#ffffff"></Button>
        <Button
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="搜索"
            android:textSize="25sp"
            android:background="#000000"
            android:textColor="#ffffff"></Button>
        <Button
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="我的"
            android:textSize="25sp"
            android:background="#000000"
            android:textColor="#ffffff"></Button>
    </LinearLayout>
    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@mipmap/c"
        android:layout_alignLeft="@+id/imga"
        android:layout_above="@+id/imgb"></ImageView>
    <ImageView
        android:id="@+id/imgb"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@mipmap/b"
        android:layout_alignLeft="@+id/imga"
        android:layout_above="@+id/imga"></ImageView>
    <ImageView
        android:id="@+id/imga"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@mipmap/a"
        android:layout_centerInParent="true"></ImageView>
    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@mipmap/d"
        android:layout_alignTop="@+id/imga"
        android:layout_alignLeft="@+id/imga"></ImageView>
</RelativeLayout>

第四题登录

效果展示

在这里插入图片描述

布局文件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity"
    android:orientation="vertical"
    android:background="#666666"
    android:padding="10dp">
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="用户登录"
        android:textSize="30sp"
        android:layout_gravity="center_horizontal"
        android:textColor="#000000"></TextView>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="用户名"
            android:textSize="25sp"></TextView>
        <EditText
            android:id="@+id/username"
            android:layout_marginRight="20dp"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content"></EditText>
    </LinearLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="密码"
            android:textSize="25sp"></TextView>
        <EditText
            android:id="@+id/password"
            android:layout_marginRight="20dp"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content"
            android:inputType="textPassword"></EditText>
    </LinearLayout>
    <Button
        android:id="@+id/btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:text="登录"></Button>
</LinearLayout>

实现类

package cn.itcast.test_01;

import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
    EditText username,password;
    Button btn;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        username = findViewById(R.id.username);
        password = findViewById(R.id.password);

        btn= findViewById(R.id.btn);
        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                String user = username.getText().toString();
                String pwd = password.getText().toString();
                if (user.equals("zhangsan")&&pwd.equals("123123")){
                    Toast.makeText(MainActivity.this,"恭喜你，登录成功！",Toast.LENGTH_LONG).show();
                }else{
                    Toast.makeText(MainActivity.this,"对不起，用户名或密码错误！",Toast.LENGTH_LONG).show();
                }

            }
        });
    }
}

第五题计算标准体重

结果展示

在这里插入图片描述

实现代码

界面

activity_main

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity">
    <TextView
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:text="男女身高标准体重计算"
        android:textSize="25sp"
        android:textColor="@color/white"
        android:paddingTop="10dp"
        android:background="@color/purple_700"
        ></TextView>
  <LinearLayout
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:orientation="horizontal">
      <TextView
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:text="你的身高"
          android:textSize="20sp"
          ></TextView>
      <EditText
          android:id="@+id/height"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_weight="1"></EditText>
  </LinearLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="你的性别"
            android:textSize="20sp"
            android:paddingTop="10dp"
            ></TextView>
        <RadioGroup
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="horizontal">
            <RadioButton
                android:id="@+id/male"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="男"
                android:layout_marginRight="20dp"
                android:checked="true"></RadioButton>
            <RadioButton
                android:id="@+id/female"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="女"></RadioButton>
        </RadioGroup>
    </LinearLayout>
    <Button
        android:id="@+id/btnSubmit"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="计算标准体重"
        android:layout_gravity="center_horizontal"></Button>
</LinearLayout>

result.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity">
    <TextView
        android:id="@+id/tv1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="35sp"
        android:textStyle="bold"
        android:textColor="#52DDEF"
        ></TextView>
    <TextView
        android:id="@+id/tv2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="18sp"
        android:textColor="#FF00BCD4"
        ></TextView>
</LinearLayout>

实现功能

MainActivity

import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.RadioButton;

public class MainActivity extends AppCompatActivity {
    private RadioButton male;
    private EditText editText;
    private Button btnSubmit;
    String sex="";
    private int height;
    private float standardWeight;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        btnSubmit=this.findViewById(R.id.btnSubmit);
        editText=this.findViewById(R.id.height);
        male= this.findViewById(R.id.male);
        if(male.isChecked()){
            sex="男";
        }else{sex="女";}
        btnSubmit.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                height=Integer.parseInt(editText.getText().toString());
                if(sex.equals("男")){
                    standardWeight=(float) ((height-80)*0.7);
                    System.out.println("standardWeight:"+standardWeight);
                }else{
                    standardWeight=(float)((height-70)*0.6);
                    System.out.println("standardWeight:"+standardWeight);
                }
                Intent intent=new Intent(MainActivity.this,ResultActivity.class);
                intent.putExtra("height",height);
                intent.putExtra("weight",standardWeight);
                MainActivity.this.startActivity(intent);
            }
        });
    }
}

ResultActivity

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.TextView;

public class ResultActivity extends Activity {
    private TextView tv1,tv2;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        this.setContentView(R.layout.result);
        tv1=(TextView) this.findViewById(R.id.tv1);
        tv2=(TextView) this.findViewById(R.id.tv2);
        Intent intent=this.getIntent();
        int h=intent.getIntExtra("height",0);
        float w=intent.getFloatExtra("weight",0);
        String str1="身高为"+h+"cm的男性标准体重计算结果";
        String str2="身高为"+h+"cm的男性标准体重计算结果"+w+"kg,本计算结果是根据世界卫生组织计算方法计算得出，仅供参考。";
        tv1.setText(str1);
        tv2.setText(str2);
    }
}

第六题问卷调查

效果展示

在这里插入图片描述

代码实现

界面代码

activity_main

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    tools:context=".MainActivity">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">
        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="大学生生活消费调查问卷"
            android:gravity="center"
            android:textColor="@color/white"
            android:background="@color/teal_200"></TextView>
        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="1、您的性别是："></TextView>
        <RadioGroup
            android:id="@+id/sexGroup"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal"
            android:background="@color/teal_200">
            <RadioButton
                android:id="@+id/male"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="男"
                android:checked="true"></RadioButton>
            <RadioButton
                android:id="@+id/female"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="女"></RadioButton>
        </RadioGroup>
        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="2、您的年级是："></TextView>
        <RadioGroup
            android:id="@+id/gradeGroup"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal"
            android:background="@color/teal_200">
            <RadioButton
                android:id="@+id/first"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="大一"></RadioButton>
            <RadioButton
                android:id="@+id/second"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="大二"></RadioButton>
            <RadioButton
                android:id="@+id/third"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="大三"></RadioButton>
            <RadioButton
                android:id="@+id/forth"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="大四"></RadioButton>
        </RadioGroup>

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="3、您的每月生活费是："></TextView>
        <RadioGroup
            android:id="@+id/moneyGroup"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal"
            android:background="@color/teal_200">
            <RadioButton
                android:id="@+id/money_1"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="0-1000"></RadioButton>
            <RadioButton
                android:id="@+id/money_2"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="1000-1500"></RadioButton>
            <RadioButton
                android:id="@+id/money_3"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="1500-2000"></RadioButton>
            <RadioButton
                android:id="@+id/money_4"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="2000以上"></RadioButton>
        </RadioGroup>
        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="4、您的生活费主要花费在哪些方面："></TextView>
        <CheckBox
            android:id="@+id/food"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="伙食"/>
        <CheckBox
            android:id="@+id/clothes"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="买衣服"/>
        <CheckBox
            android:id="@+id/travel"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="旅游"/>
        <CheckBox
            android:id="@+id/money"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="发红包"/>
        <CheckBox
            android:id="@+id/traffic"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="交通"/>
        <CheckBox
            android:id="@+id/study"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="学习用品"/>
    </LinearLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:layout_gravity="center_horizontal">
        <Button
            android:id="@+id/submitBtn"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="提交"
            android:textColor="@color/white"
            android:background="#FF1C887E"
            android:layout_marginLeft="60dp"
            android:layout_marginRight="40dp"></Button>
        <Button
            android:id="@+id/exitBtn"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
           android:layout_gravity="center_horizontal"
            android:text="退出"
            android:textColor="@color/white"
            android:background="#FF1C887E"
            android:layout_marginRight="50dp"></Button>
    </LinearLayout>
</LinearLayout>

result

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    tools:context=".MainActivity">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">
        <TextView
            android:id="@+id/tv1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="您提交的信息如下"
            android:textSize="30dp"
            android:textColor="@color/black"></TextView>
        <TextView
            android:id="@+id/tvInfo"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:textSize="25sp"
            android:textColor="@color/white"
            android:background="@color/teal_200"></TextView>
    </LinearLayout>
</LinearLayout>

功能代码

MainActivity

package cn.itcast.investigation;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.RadioButton;
import android.widget.RadioGroup;

public class MainActivity extends AppCompatActivity {
    private RadioGroup sexGroup,gradeGroup,moneyGroup;
    private RadioButton radioButton,male,female,first,second,third,forth;
    private Button submitBtn,exitBtn;
    private int checkId[]=new int[]{R.id.food,R.id.clothes,R.id.travel,R.id.money,R.id.traffic,R.id.study};
    private  String sex,grade,money,content="";
    private String info;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        sexGroup=findViewById(R.id.sexGroup);
        gradeGroup=findViewById(R.id.gradeGroup);
        moneyGroup=findViewById(R.id.moneyGroup);

        male=findViewById(R.id.male);
        female=findViewById(R.id.female);
        first=findViewById(R.id.first);
        second=findViewById(R.id.second);
        third=findViewById(R.id.third);
        forth=findViewById(R.id.forth);

        exitBtn=findViewById(R.id.exitBtn);
        submitBtn=findViewById(R.id.submitBtn);

       submitBtn.setOnClickListener(new View.OnClickListener() {
           @Override
           public void onClick(View view) {
              radioButton = MainActivity.this.findViewById(sexGroup.getCheckedRadioButtonId());//获得性别
              sex= radioButton.getText().toString();
               radioButton = MainActivity.this.findViewById(gradeGroup.getCheckedRadioButtonId());//获得年级
               grade= radioButton.getText().toString();
               radioButton = MainActivity.this.findViewById(moneyGroup.getCheckedRadioButtonId());//获得月消费
               money= radioButton.getText().toString();
               生活费的花销项目
               CheckBox cb;
               for(int i=0;i<checkId.length;i++){
                  cb=MainActivity.this.findViewById(checkId[i]);
                  if(cb.isChecked()){
                      content=content+cb.getText()+"、";
                  }
               }
               info="性别："+sex+"\n"+"年级："+grade+"\n"+"月生活费："+money+"\n"+"花费的主要内容："+content;
               System.out.println("信息如下："+info);
               Intent intent=new Intent(MainActivity.this,Result.class);
               intent.putExtra("information",info);
               MainActivity.this.startActivity(intent);
           }
       });
       exitBtn.setOnClickListener(new View.OnClickListener() {
           @Override
           public void onClick(View view) {
               MainActivity.this.finish();
           }
       });

    }
}

Result

package cn.itcast.investigation;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.TextView;

public class Result extends Activity {
    private TextView tvInfo;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.result);
        tvInfo=this.findViewById(R.id.tvInfo);
        Intent intent=this.getIntent();
        String info=intent.getStringExtra("information");
        System.out.println("显示信息如下："+info);
        tvInfo.setText(info);
    }
}