Switch_2

activity_switch_ios.xml 

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:padding="10dp" >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:paddingTop="10dp" >

        <TextView
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:gravity="left|center_vertical"
            android:text="仿iOS的开关："
            android:textColor="#000000"
            android:textSize="17sp" />

        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="vertical" >

            <CheckBox
                android:id="@+id/ck_status"
                android:layout_width="100dp"
                android:layout_height="50dp"
                android:background="@drawable/switch_selector"
                android:button="@null" />
        </LinearLayout>
    </LinearLayout>

    <TextView
        android:id="@+id/tv_result"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:paddingTop="10dp"
        android:gravity="left"
        android:textColor="#000000"
        android:textSize="17sp" />

</LinearLayout>

switch_selector.xml 

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_checked="true" android:drawable="@drawable/switch_on"/>
    <item android:drawable="@drawable/switch_off"/>
</selector>

MainActivity.java 

package com.example.third;

import android.os.Bundle;

import androidx.appcompat.app.AppCompatActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.Switch;
import android.widget.TextView;


public class MainActivity extends AppCompatActivity implements CompoundButton.OnCheckedChangeListener {
    private CheckBox ck_status; // 声明一个复选框对象
    private TextView tv_result; // 声明一个文本视图对象
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_switch_ios);
        // 从布局文件中获取名叫sw_status的开关按钮
        ck_status = findViewById(R.id.ck_status);
        // 从布局文件中获取名叫tv_result的文本视图
        tv_result = findViewById(R.id.tv_result);
        // 给开关按钮设置选择监听器，一旦用户点击它，就触发监听器的onCheckedChanged方法
        ck_status.setOnCheckedChangeListener(this);
        refreshResult();
    }


    // 刷新仿iOS按钮的开关状态说明
    private void refreshResult() {
        String result = String.format("仿iOS开关的状态是%s",
                (ck_status.isChecked()) ? "开" : "关");
        tv_result.setText(result);
    }
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }


    @Override
    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
        refreshResult();
    }
}