[移动开发]android信息登记，页面跳转及文件存储

实例二

MainActivity

package com.example.test02;

import android.app.Activity;
import android.app.DatePickerDialog;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.Switch;
import android.widget.Toast;

public class MainActivity extends Activity {
    EditText et_birthday;
    //SharedPreferences对象，用于轻量级数据存储
    private SharedPreferences sp;

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

        // 获取到轻量级存储对象
        sp = getSharedPreferences("listDate", MODE_PRIVATE);

        //日期获取
        et_birthday = findViewById(R.id.et_birthday);
        //点击日历选择日期
        et_birthday.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                new DatePickerDialog(MainActivity.this, new DatePickerDialog.OnDateSetListener() {
                    @Override
                    public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
                        // 此处得到选择的时间，可以进行你想要的操作
                        String time = year + "-" + (monthOfYear + 1) + "-" + dayOfMonth;
                        et_birthday.setText(time);
                    }
                }
                        // 设置初始日期
                        , 2021, 10, 10).show();
            }
        });

        Button bt_submit = findViewById(R.id.bt_submit);
        //保存按钮的点击事件
        bt_submit.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                SharedPreferences.Editor editor = sp.edit();//必须创建在里面，不能创建在外面

                StringBuilder sb = new StringBuilder();
                //创建Stringbuilder对象，用于存储字符串便利

                //用户名
                EditText et_username = findViewById(R.id.et_username);
                sb.append("用户名：" + et_username.getText());
                editor.putString("name", et_username.getText().toString());

                //口令
                EditText et_password = findViewById(R.id.et_password);
                sb.append("，口令：" + et_password.getText());
                editor.putString("pass", et_password.getText().toString());

                //专业
                RadioGroup rg_major = findViewById(R.id.rg_major);
                RadioButton rb = findViewById(rg_major.getCheckedRadioButtonId());
                //getCheckedRadioButtonId 得到被cheked的按钮的id
                sb.append("，专业：" + rb.getText());
                editor.putString("major", rb.getText().toString());

                //爱好
                sb.append("，爱好：");

                CheckBox cb = findViewById(R.id.cb_net);
                if (cb.isChecked()) {
                    sb.append(cb.getText());
                    editor.putString("hobby1", cb.getText().toString());
                } else {
                    editor.putString("hobby1", "empty");
                }

                cb = findViewById(R.id.cb_sports);
                if (cb.isChecked()) {
                    sb.append(cb.getText());
                    editor.putString("hobby2", cb.getText().toString());
                } else {
                    editor.putString("hobby2", "empty");
                }

                cb = findViewById(R.id.cb_reading);
                if (cb.isChecked()) {
                    sb.append(cb.getText());
                    editor.putString("hobby3", cb.getText().toString());
                } else {
                    editor.putString("hobby3", "empty");
                }


                //设置生日
                sb.append("，出生日期：" + et_birthday.getText().toString());
                editor.putString("birthday", et_birthday.getText().toString());


                //激活与否
                Switch switch1=(Switch)findViewById(R.id.switch1);
                String s=switch1.isChecked()?"已激活":"未激活";
                sb.append("，激活与否：" + s);
                editor.putString("sw",s);

                //显示到屏幕上
                Toast.makeText(MainActivity.this, sb.toString(), Toast.LENGTH_LONG).show();
                editor.commit();
                //提交
            }
        });


        Button bt_next = (Button) findViewById(R.id.bt_next);
        bt_next.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                //创建intent对象,进行跳转
                Intent intent = new Intent();
                intent.setClass(MainActivity.this, SecondActivity.class);
                startActivity(intent);

                //如果不关闭当前的会出现好多个页面
                MainActivity.this.finish();
            }
        });
    }
}

SecondActivity.java

package com.example.test02;


import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.TextView;

public class SecondActivity extends Activity {
    EditText et_birthday;
    //SharedPreferences对象，用于轻量级数据存储
    private SharedPreferences sp;


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

        // 获取到轻量级存储对象
        sp = getSharedPreferences("listDate", MODE_PRIVATE);

        //恢复按钮
        Button bt_read = (Button) findViewById(R.id.bt_read);
        bt_read.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                String name = sp.getString("name", "");
                String pass = sp.getString("pass", "");
                String major = sp.getString("major", "");
                String hobby1 = sp.getString("hobby1", "");
                String hobby2 = sp.getString("hobby2", "");
                String hobby3 = sp.getString("hobby3", "");
                String birthday = sp.getString("birthday", "");
                String sw = sp.getString("sw", "");

                //恢复用户名
                TextView tv_username = findViewById(R.id.tv_username);
                tv_username.setText("账号："+name);

                //恢复口令

                TextView tv_password = findViewById(R.id.tv_password);
                tv_password.setText("密码："+pass);

                //恢复专业
                TextView tv_job = findViewById(R.id.tv_job);
                tv_job.setText(name);
                if (major.equals("软件")) {//不能直接用major=="软件"
                    tv_job.setText("专业："+"软件");
                } else if (major.equals("物联网")) {
                    tv_job.setText("专业："+"物联网");
                } else if (major.equals("计算机")) {
                    tv_job.setText("专业："+"计算机");
                } else if (major.equals("大数据")) {
                    tv_job.setText("专业："+"大数据");
                }

                //恢复爱好
                CheckBox cb_net = (CheckBox) findViewById(R.id.cb_net);
                CheckBox cb_sports = (CheckBox) findViewById(R.id.cb_sports);
                CheckBox cb_reading = (CheckBox) findViewById(R.id.cb_reading);
                if (hobby1.equals("上网")) {
                    cb_net.setChecked(true);
                }
                if (hobby2.equals("运动")) {
                    cb_sports.setChecked(true);
                }
                if (hobby3.equals("读书")) {
                    cb_reading.setChecked(true);
                }

                //回复生日
                TextView tv_birthday = findViewById(R.id.tv_birthday);
                tv_birthday.setText("出生日期："+birthday);

                //激活状态
                TextView switch1 = findViewById(R.id.tv_switch);
                switch1.setText("激活与否："+sw);

            }
        });

        Button bt_next = (Button) findViewById(R.id.bt_next);
        bt_next.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                //创建intent对象,进行跳转
                Intent intent = new Intent();
                intent.setClass(SecondActivity.this,MainActivity.class);
                startActivity(intent);

                //如果不关闭当前的会出现好多个页面
                SecondActivity.this.finish();
            }
        });
    }
}

activity_main.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">

        <EditText
            android:id="@+id/et_username"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="请输入用户名" />

        <EditText
            android:id="@+id/et_password"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="请输入口令"
            />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="专业"/>

        <RadioGroup
            android:id="@+id/rg_major"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="horizontal" >

            <RadioButton
                android:id="@+id/rd_soft"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:checked="true"
                android:text="软件" />
            <RadioButton
                android:id="@+id/rd_net"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="物联网" />
            <RadioButton
                android:id="@+id/rd_computer"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="计算机" />

            <RadioButton
                android:id="@+id/rd_info"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="大数据" />
        </RadioGroup>
        <TextView
            android:id="@+id/tv_major"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="爱好"/>

    <CheckBox
            android:id="@+id/cb_net"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="上网" />

        <CheckBox
            android:id="@+id/cb_sports"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="运动" />

        <CheckBox
            android:id="@+id/cb_reading"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="读书" />

    <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="出生日期"/>

    <EditText
            android:id="@+id/et_birthday"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:inputType="textPersonName" />

    <Switch
        android:id="@+id/switch1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="激活状态" />

    <Button
            android:id="@+id/bt_submit"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="保存数据到文件" />

        <Button
            android:id="@+id/bt_next"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="下一页" />
    </LinearLayout>

second.xml

<?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="match_parent"
    android:orientation="vertical">

    <TextView
        android:id="@+id/tv_username"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="0"
        android:text="账号："
        android:textSize="18sp" />

    <TextView
        android:id="@+id/tv_password"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="0"
        android:text="密码："
        android:textSize="18sp" />

    <TextView
        android:id="@+id/tv_job"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="0"
        android:text="专业:"
        android:textSize="18sp" />

    <TextView
        android:id="@+id/tv_major"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="爱好:"
        android:textSize="18sp" />

        <CheckBox
        android:id="@+id/cb_net"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="上网" />

        <CheckBox
        android:id="@+id/cb_sports"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="运动" />

        <CheckBox
        android:id="@+id/cb_reading"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="读书" />

    <TextView
        android:id="@+id/tv_birthday"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="18sp"
        android:text="出生日期：" />

    <TextView
        android:id="@+id/tv_switch"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="18sp"
        android:text="激活与否：" />

    <Button
        android:id="@+id/bt_read"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="从文件读取数据" />

    <Button
        android:id="@+id/bt_next"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="上一页" />

</LinearLayout>