<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:orientation="vertical"
tools:context="com.example.a3_.MainActivity">

<com.example.a3_.MyToggleButton
 android:id="@+id/myToggle"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content" />

<com.example.a3_.MyToggleButton
 android:id="@+id/myToggle2"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content" />
</LinearLayout>

package com.example.a3_;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

private MyToggleButton toggleButton;
private MyToggleButton toggleButton2;

@Override
protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);

 //初始化控件
 toggleButton = (MyToggleButton) findViewById(R.id.myToggle);
 //設置按鈕的狀態(tài)
 toggleButton.setToggleStste(true);
 //創(chuàng)建一個監(jiān)聽
 MyListener myListener = new MyListener();
 //設置監(jiān)聽
 toggleButton.setOnToggleStateChangedListener(myListener);

 //初始化控件
 toggleButton2 = (MyToggleButton) findViewById(R.id.myToggle2);
 //設置按鈕的狀態(tài)
 toggleButton2.setToggleStste(true);
 //創(chuàng)建一個監(jiān)聽
 MyListener myListener2 = new MyListener();
 //設置監(jiān)聽
 toggleButton2.setOnToggleStateChangedListener(myListener2);

}

//創(chuàng)建一個監(jiān)聽
class MyListener implements MyToggleButton.onToggleStateChangedListener {

 @Override
 public void onToggleStateChange(MyToggleButton button, boolean isToggleOn) {

  //判定是哪個按鈕觸發(fā)了監(jiān)聽
  switch (button.getId()) {
   case R.id.myToggle:
    Toast.makeText(MainActivity.this, isToggleOn ? "開1" : "關1", Toast.LENGTH_SHORT).show();
    break;
   case R.id.myToggle2:
    Toast.makeText(MainActivity.this, isToggleOn ? "開2" : "關2", Toast.LENGTH_SHORT).show();
  }

 }
}
}

package com.example.a3_;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;

/**
 * Created by Administrator on 2017.05.27.0027.
 */

public class MyToggleButton extends View {

private Bitmap bgBitmap;
private Bitmap slidebg;
private final int viewWidth;
private final int viewheight;
private float slidebgleft;
private final int slideWidth;
private final int slideMaxLeft;
//設置一個成員變量,用來判定開關的狀態(tài)
private boolean toggleStste = false;
private boolean canChangeToggleState = false;

private onToggleStateChangedListener monToggleStateChangedListener = null;

//創(chuàng)建一個開關狀態(tài)改變的監(jiān)聽,當狀態(tài)改變時觸發(fā),否則不觸發(fā)
public void setOnToggleStateChangedListener(onToggleStateChangedListener monToggleStateChangedListener) {
 this.monToggleStateChangedListener = monToggleStateChangedListener;
}


public MyToggleButton(Context context, AttributeSet attrs) {
 super(context, attrs);
 //設置按鈕的背景和滑塊資源
 setBackgroundAndSlideResource(R.mipmap.toogle_background, R.mipmap.toogle_slidebg);
 //獲取背景的高度和寬度
 viewWidth = bgBitmap.getWidth();
 viewheight = bgBitmap.getHeight();
 //背景的寬和高就是這個自定義按鈕的寬和高
 //獲取滑塊的寬度
 slideWidth = slidebg.getWidth();
 //計算滑塊的右邊最大值
 slideMaxLeft = viewWidth - slideWidth;
}

//定義一個方法,用來顯示按鈕是開還是關
public void setToggleStste(boolean toggleStste) {
 this.toggleStste = toggleStste;
 if (toggleStste) {
  slidebgleft = slideMaxLeft;
 } else {
  slidebgleft = 0;
 }
 //重新繪制
 invalidate();
}

//設置按鈕的背景和滑塊資源
private void setBackgroundAndSlideResource(int toogle_background, int toogle_slidebg) {
 bgBitmap = BitmapFactory.decodeResource(getResources(), toogle_background);
 slidebg = BitmapFactory.decodeResource(getResources(), toogle_slidebg);
}

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
//  super.onMeasure(widthMeasureSpec, heightMeasureSpec);
 //調(diào)用setMeasuredDimension繪制按鈕的區(qū)域
 setMeasuredDimension(viewWidth, viewheight);
}

@Override
protected void onDraw(Canvas canvas) {

 //重寫drawBitmap,將控件的背景和滑塊繪制到頁面中
 canvas.drawBitmap(bgBitmap, 0, 0, null);
 drawSlide(canvas);

}

//通過控制slidebgleft,來控制滑塊的位置
private void drawSlide(Canvas canvas) {
 //限制滑塊的運行區(qū)間,防止滑塊移動到界外
 if (slidebgleft < 0) {
  slidebgleft = 0;
 } else if (slidebgleft > slideMaxLeft) {
  slidebgleft = slideMaxLeft;
 }
 canvas.drawBitmap(slidebg, slidebgleft, 0, null);
 if (canChangeToggleState) {
  canChangeToggleState = false;
  //記錄上一次開關的狀態(tài)
  boolean lastToggleState = toggleStste;
  //根據(jù)當前滑塊的位置更新開關的狀態(tài)
  if (slidebgleft == 0) {
   toggleStste = false;
  } else {
   toggleStste = true;
  }

  //如果當前的狀態(tài)與上一次狀態(tài)不同時,才會觸發(fā)監(jiān)聽事件
  if (lastToggleState != toggleStste && monToggleStateChangedListener != null) {
   monToggleStateChangedListener.onToggleStateChange(this, toggleStste);
  }
 }
}

//設置按鈕的觸摸事件
@Override
public boolean onTouchEvent(MotionEvent event) {
 switch (event.getAction()) {
  case MotionEvent.ACTION_DOWN:
   slidebgleft = event.getX() - slideWidth / 2;
   break;
  case MotionEvent.ACTION_MOVE:
   slidebgleft = event.getX() - slideWidth / 2;
   break;
  case MotionEvent.ACTION_UP:
   if (event.getX() > viewWidth / 2) {
    slidebgleft = slideMaxLeft;
   } else {
    slidebgleft = 0;
   }
   //只有當手機離開屏幕的是否才可以觸發(fā)監(jiān)聽
   canChangeToggleState = true;
   break;
 }
 //重復不斷地繪制
 invalidate();
 return true;
}

interface onToggleStateChangedListener {
 void onToggleStateChange(MyToggleButton button, boolean isToggleOn);
}
}