[移动开发]android连续多个界面跳转与回退的实现

新建一个module

选择第一个phone&Table Module

起个名字

选择Empty Activity，接下来finish即可

?

目录结构：

?右键单击module新建三个Activity分别是MainActivity,NextActivity,ThirdActivity

得到三个***ACtivity.java,自动生成3个对应的activity_***.xml,并且在AndroidManifest.xml中得到如下对新的界面注册登记的代码：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.forward_back">
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".NextActivity"></activity>
        <activity android:name=".ThirdActivity"></activity>
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

?MainActivity.java

public class MainActivity extends AppCompatActivity {
    Button btnNext;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        btnNext = (Button) findViewById(R.id.button);
        btnNext.setOnClickListener(
                new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        Intent intent=new Intent(getApplicationContext(),NextActivity.class);
                        startActivity(intent);
                    }
                }
        );
    }
}

NextActivity.java

public class NextActivity extends AppCompatActivity {
    Button btnBack, btnGoToThirdPage;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_next);
        btnBack = (Button) findViewById(R.id.btnBack);
        btnGoToThirdPage = (Button) findViewById(R.id.btnGoToThirdPage);
        btnBack.setOnClickListener(
                new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
//                        返回到上一个界面
                        finish();
                    }
                }
        );
        btnGoToThirdPage.setOnClickListener(
                new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        Intent intent = new Intent(getApplicationContext(), ThirdActivity.class);
                        startActivity(intent);
                    }
                }
        );
    }
}

ThirdActivity.java

public class ThirdActivity extends AppCompatActivity {
    Button btnThirdBack;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_third);
        btnThirdBack=(Button)findViewById(R.id.btnThirdBack);
        btnThirdBack.setOnClickListener(
                new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        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:paddingTop="50dp"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <TextView
        android:layout_width="185dp"
        android:layout_height="48dp"
        android:text="我是第一页"
        android:textSize="30sp"
        android:layout_gravity="center_horizontal"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="下一页"
        android:textSize="20dp"
        android:layout_gravity="center_horizontal"
        android:id="@+id/button"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />

</LinearLayout >

activity_next.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=".NextActivity">

    <TextView
        android:id="@+id/textView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:paddingTop="50dp"
        android:text="我是第二页"
        android:gravity="center"
        android:textSize="30sp" />
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:paddingTop="30dp"
        android:orientation="horizontal"
        android:gravity="center_horizontal">
        <Button
            android:id="@+id/btnBack"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textSize="20dp"
            android:text="返回" />

        <Button
            android:id="@+id/btnGoToThirdPage"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textSize="20dp"
            android:text="下一页"/>
    </LinearLayout>
</LinearLayout>

activity_third.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=".ThirdActivity">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="我是第三页"
        android:textSize="30sp"
        android:paddingTop="50dp"
        android:gravity="center_horizontal"
        android:paddingBottom="30dp"
        android:id="@+id/txtThird"/>

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/btnThirdBack"
        android:textSize="20dp"
        android:layout_gravity="center"
        android:text="返回上一页"/>

</LinearLayout>

?

实现左上角回退箭头，只需在AndroidManifest.xml进行如下修改

运行结果是