一、新建一个Empty Activity项目:
二、修改activity_main.xml布局文件:
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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"><TextViewandroid:id="@+id/textView"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginStart="32dp"android:layout_marginTop="32dp"android:layout_marginEnd="32dp"android:layout_marginBottom="16dp"android:text="主页!"app:layout_constraintBottom_toBottomOf="parent"app:layout_constraintEnd_toEndOf="parent"app:layout_constraintStart_toStartOf="parent"app:layout_constraintTop_toTopOf="parent" /><Buttonandroid:id="@+id/button"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginStart="32dp"android:layout_marginTop="16dp"android:layout_marginEnd="32dp"android:layout_marginBottom="32dp"android:text="下一页"android:onClick="play"app:layout_constraintBottom_toBottomOf="parent"app:layout_constraintEnd_toEndOf="parent"app:layout_constraintStart_toStartOf="parent"app:layout_constraintTop_toBottomOf="@+id/textView" /></androidx.constraintlayout.widget.ConstraintLayout>
三、修改MainActivity.java:
public void play(View view) {Intent intent = new Intent();intent.setClass(this,MainActivity2.class);startActivity(intent); }
四、新建一个Empty Activity:
五、修改activity_main2.xml布局文件:
<?xml version="1.0" encoding="utf-8"?> <androidx.constraintlayout.widget.ConstraintLayout 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=".MainActivity2"><TextViewandroid:id="@+id/textView2"android:layout_width="109dp"android:layout_height="83dp"android:layout_marginStart="32dp"android:layout_marginTop="32dp"android:layout_marginEnd="32dp"android:layout_marginBottom="16dp"android:text="第二页"app:layout_constraintBottom_toBottomOf="parent"app:layout_constraintEnd_toEndOf="parent"app:layout_constraintStart_toStartOf="parent"app:layout_constraintTop_toTopOf="parent" /><Buttonandroid:id="@+id/button3"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginStart="32dp"android:layout_marginTop="16dp"android:layout_marginEnd="32dp"android:layout_marginBottom="32dp"android:text="返回"android:onClick="jump"app:layout_constraintBottom_toBottomOf="parent"app:layout_constraintEnd_toEndOf="parent"app:layout_constraintStart_toStartOf="parent"app:layout_constraintTop_toBottomOf="@+id/textView2" /> </androidx.constraintlayout.widget.ConstraintLayout>
六、修改MainActivity2.java:
public void jump(View view) {Intent intent = new Intent();intent.setClass(this,MainActivity.class);startActivity(intent); }
七、编译运行,点击按钮,切换: