switch按钮 打开和关闭

switch按钮 打开和关闭

step1: 点击事件

package com.example.switchdemo;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.widget.CompoundButton;
import android.widget.Switch;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Switch switchRad = (Switch) findViewById(R.id.switch1);
        switchRad.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                if (isChecked == true) {
                    Toast.makeText(getBaseContext(), "TRUE", Toast.LENGTH_SHORT).show();
                } else {
                    Toast.makeText(getBaseContext(), "FALSE", Toast.LENGTH_SHORT).show();
                }
            }
        });
    }

}

step2: 布局

<?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">

    <Switch
        android:id="@+id/switch1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginEnd="16dp"
        android:layout_marginBottom="8dp"
        android:text="@string/app_name" />
</LinearLayout>

end