public class SwitchButtonView extends View { 
 
   
  public SwitchButtonView(Context context) { 
    this(context, null); 
  } 
 
  public SwitchButtonView(Context context, AttributeSet attrs) { 
    super(context, attrs); 
  } 

@Override 
  protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 
 
    mSwitchButton = BitmapFactory.decodeResource(getResources(), R.drawable.switch_background); 
    mSlideButton = BitmapFactory.decodeResource(getResources(), R.drawable.slide_button_background); 
    setMeasuredDimension(mSwitchButton.getWidth(), mSwitchButton.getHeight()); 
  } 

package com.lian.switchtogglebutton; 
 
import android.content.Context; 
import android.graphics.Bitmap; 
import android.graphics.BitmapFactory; 
import android.graphics.Canvas; 
import android.graphics.Paint; 
import android.util.AttributeSet; 
import android.util.Log; 
import android.view.MotionEvent; 
import android.view.View; 
 
/** 
 * Created by lian on 2016/3/20. 
 */ 
public class SwitchButtonView extends View { 
 
  private static final int STATE_NULL = 0;//默认状态 
  private static final int STATE_DOWN = 1; 
  private static final int STATE_MOVE = 2; 
  private static final int STATE_UP = 3; 
 
  private Bitmap mSlideButton; 
  private Bitmap mSwitchButton; 
  private Paint mPaint = new Paint(); 
  private int buttonState = STATE_NULL; 
  private float mDistance; 
  private boolean isOpened = false; 
  private onSwitchListener mListener; 
 
  public SwitchButtonView(Context context) { 
    this(context, null); 
  } 
 
  public SwitchButtonView(Context context, AttributeSet attrs) { 
    super(context, attrs); 
  } 
 
  @Override 
  protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 
 
    mSwitchButton = BitmapFactory.decodeResource(getResources(), R.drawable.switch_background); 
    mSlideButton = BitmapFactory.decodeResource(getResources(), R.drawable.slide_button_background); 
    setMeasuredDimension(mSwitchButton.getWidth(), mSwitchButton.getHeight()); 
  } 
 
  @Override 
  protected void onDraw(Canvas canvas) { 
    super.onDraw(canvas); 
    if (mSwitchButton!= null){ 
      canvas.drawBitmap(mSwitchButton, 0, 0, mPaint); 
    } 
    //buttonState的值在onTouchEvent（）中确定 
    switch (buttonState){ 
      case STATE_DOWN: 
      case STATE_MOVE: 
        if (!isOpened){ 
          float middle = mSlideButton.getWidth() / 2f; 
          if (mDistance > middle) { 
            float max = mSwitchButton.getWidth() - mSlideButton.getWidth(); 
            float left = mDistance - middle; 
            if (left >= max) { 
              left = max; 
            } 
            canvas.drawBitmap(mSlideButton,left,0,mPaint); 
          } 
 
          else { 
 
            canvas.drawBitmap(mSlideButton,0,0,mPaint); 
          } 
        }else{ 
          float middle = mSwitchButton.getWidth() - mSlideButton.getWidth() / 2f; 
          if (mDistance < middle){ 
            float left = mDistance-mSlideButton.getWidth()/2f; 
            float min = 0; 
            if (left < 0){ 
              left = min; 
            } 
            canvas.drawBitmap(mSlideButton,left,0,mPaint); 
          }else{ 
            canvas.drawBitmap(mSlideButton,mSwitchButton.getWidth()-mSlideButton.getWidth(),0,mPaint); 
          } 
        } 
 
 
 
        break; 
 
      case STATE_NULL: 
      case STATE_UP: 
        if (isOpened){ 
          Log.d("开关","开着的"); 
          canvas.drawBitmap(mSlideButton,mSwitchButton.getWidth()-mSlideButton.getWidth(),0,mPaint); 
        }else{ 
          Log.d("开关","关着的"); 
          canvas.drawBitmap(mSlideButton,0,0,mPaint); 
        } 
        break; 
 
      default: 
        break; 
    } 
 
  } 
 
  @Override 
  public boolean onTouchEvent(MotionEvent event) { 
 
    switch (event.getAction()){ 
      case MotionEvent.ACTION_DOWN: 
        mDistance = event.getX(); 
        Log.d("DOWN","按下"); 
        buttonState = STATE_DOWN; 
        invalidate(); 
        break; 
 
      case MotionEvent.ACTION_MOVE: 
        buttonState = STATE_MOVE; 
        mDistance = event.getX(); 
        Log.d("MOVE","移动"); 
        invalidate(); 
        break; 
 
      case MotionEvent.ACTION_UP: 
        mDistance = event.getX(); 
        buttonState = STATE_UP; 
        Log.d("UP","起开"); 
        if (mDistance >= mSwitchButton.getWidth() / 2f){ 
          isOpened = true; 
        }else { 
          isOpened = false; 
        } 
        if (mListener != null){ 
          mListener.onSwitchChanged(isOpened); 
        } 
        invalidate(); 
        break; 
      default: 
        break; 
    } 
 
    return true; 
  } 
 
  public void setOnSwitchListener(onSwitchListener listener){ 
    this.mListener = listener; 
  } 
 
  public interface onSwitchListener{ 
    void onSwitchChanged(boolean isOpened); 
  } 
} 

package com.lian.switchtogglebutton; 
 
import android.os.Bundle; 
import android.support.v7.app.AppCompatActivity; 
import android.widget.Toast; 
 
public class MainActivity extends AppCompatActivity { 
 
  @Override 
  protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
 
    SwitchButtonView switchButtonView = (SwitchButtonView) findViewById(R.id.switchbutton); 
    switchButtonView.setOnSwitchListener(new SwitchButtonView.onSwitchListener() { 
      @Override 
      public void onSwitchChanged(boolean isOpened) { 
        if (isOpened) { 
          Toast.makeText(MainActivity.this, "打开", Toast.LENGTH_SHORT).show(); 
        }else { 
          Toast.makeText(MainActivity.this, "关闭", Toast.LENGTH_SHORT).show(); 
        } 
      } 
    }); 
  } 
} 

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout 
  xmlns:android="http://schemas.android.com/apk/res/android" 
  xmlns:tools="http://schemas.android.com/tools" 
  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" 
  tools:context="com.lian.switchtogglebutton.MainActivity"> 
 
  <com.lian.switchtogglebutton.SwitchButtonView 
    android:id="@+id/switchbutton" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    /> 
</RelativeLayout>