效果

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代碼

<?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"><ToggleButtonandroid:id="@+id/toggleButton"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="ToggleButton"android:textOff="亮"android:textOn="滅" /><ImageViewandroid:id="@+id/imageView"android:layout_width="300dp"android:layout_height="400dp"android:layout_gravity="center"app:srcCompat="@drawable/img1" /> </LinearLayout> package com.example.jxd;import androidx.appcompat.app.AppCompatActivity;import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.CompoundButton; import android.widget.EditText; import android.widget.ImageView; import android.widget.Toast; import android.widget.ToggleButton;public class MainActivity extends AppCompatActivity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);ToggleButton toggleButton = findViewById(R.id.toggleButton);if(toggleButton != null){toggleButton.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {@Overridepublic void onCheckedChanged(CompoundButton compoundButton, boolean b) {ImageView imageView = findViewById(R.id.imageView);if(imageView != null) {if (!b) {imageView.setImageResource(R.drawable.img1);Toast.makeText(MainActivity.this, "燈滅了!", Toast.LENGTH_SHORT).show();} else {imageView.setImageResource(R.drawable.img2);Toast.makeText(MainActivity.this, "燈亮了!", Toast.LENGTH_SHORT).show();}}}});}} }

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