Android滑动解锁控件

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Rect;
import android.os.Handler;
import android.os.Message;
import android.os.Vibrator;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;
 
import com.mosjoy.ad.R;
 
public class SliderRelativeLayout extends RelativeLayout {
 
    private static String TAG = "SliderRelativeLayout";
    private TextView tv_slider_icon = null; // 初始控件，用来判断是否为拖动？
    private Bitmap dragBitmap = null; //拖拽图片
    private Context mContext = null; // 初始化图片拖拽时的Bitmap对象
    private Handler mainHandler = null; //与主Activity通信的Handler对象
    private ImageView mPhoneImageView;
    private ImageView mUnlockImageView;
    private ImageView mMessageImageView;
    private ImageView mCameraImageView;
    private boolean mStopBoolean = false;
    private Canvas mCanvas;
    public SliderRelativeLayout(Context context) {
        super(context);
        mContext = context;
        initDragBitmap();
    }
 
    public SliderRelativeLayout(Context context,AttributeSet attrs) {
        super(context,attrs,0);
        mContext = context;
        initDragBitmap();
    }
 
    public SliderRelativeLayout(Context context,AttributeSet attrs,int defStyle) {
        super(context,defStyle);
        mContext = context;
        initDragBitmap();
    }
     
    // 初始化图片拖拽时的Bitmap对象
    private void initDragBitmap() {
        if (dragBitmap == null)
            dragBitmap = BitmapFactory.decodeResource(mContext.getResources(),R.drawable.getup_slider_ico_normal);
    }
     
    @Override
    protected void onFinishInflate() {
        super.onFinishInflate();
        // 该控件主要判断是否处于滑动点击区域。滑动时 处于INVISIBLE(不可见)状态，滑动时处于VISIBLE(可见)状态
        tv_slider_icon = (TextView) findViewById(R.id.slider_icon);
        mPhoneImageView = (ImageView) findViewById(R.id.iv_phone);
        mUnlockImageView = (ImageView) findViewById(R.id.iv_unlock);
        mCameraImageView = (ImageView) findViewById(R.id.iv_camera);
        mMessageImageView = (ImageView) findViewById(R.id.iv_message);
    }
    private int mLastMoveX = 1000;  //当前bitmap应该绘制的地方 ， 初始值为足够大，可以认为看不见
    private int mLastMoveY = 1000;  //当前bitmap应该绘制的地方 ， 初始值为足够大，可以认为看不见
    public boolean onTouchEvent(MotionEvent event) {
        int x = (int) event.getX();
        int y = (int) event.getY();
        switch (event.getAction()) {
        case MotionEvent.ACTION_DOWN:
            mLastMoveX = (int) event.getX();
            mLastMoveY = (int) event.getY();
            //处理Action_Down事件：  判断是否点击了滑动区域
            return handleActionDownEvenet(event);
        case MotionEvent.ACTION_MOVE:
            mLastMoveX = x; //保存了X轴方向
            mLastMoveY = y;
            invalidate(); //重新绘制   
            return true;
        case MotionEvent.ACTION_UP:
            //处理Action_Up事件：  判断是否解锁成功，成功则结束我们的Activity ；否则 ，缓慢回退该图片。
            handleActionUpEvent(event);
            return true;
        }
        return super.onTouchEvent(event);
    }
 
    // 绘制拖动时的图片
    @Override
    protected void onDraw (Canvas canvas) {
        super.onDraw(canvas);      
        // 图片更随手势移动
        if (!mStopBoolean) {
            invalidateDragImg(canvas);
        }
        mCanvas = canvas;
    }
 
    // 图片更随手势移动
    private void invalidateDragImg(Canvas canvas) {
        //Log.e(TAG,"handleActionUpEvenet : invalidateDragImg" );
        //以合适的坐标值绘制该图片
        int drawXCor = mLastMoveX - dragBitmap.getWidth()/2;
        int drawYCor = mLastMoveY - dragBitmap.getHeight()/2;
        canvas.drawBitmap(dragBitmap,drawXCor < 0 ? 5 : drawXCor,drawYCor,null);
//      isHitUnlock(canvas);
    }
 
    // 手势落下是，是否点中了图片，即是否需要开始移动
    private boolean handleActionDownEvenet(MotionEvent event) {
        Rect rect = new Rect();
        tv_slider_icon.getHitRect(rect);
        boolean isHit = rect.contains((int) event.getX(),(int) event.getY());
        //开始拖拽 ，隐藏该图片
        if(isHit && !mStopBoolean){ 
            tv_slider_icon.setVisibility(View.INVISIBLE);
            mPhoneImageView.setVisibility(View.VISIBLE);
            mUnlockImageView.setVisibility(View.VISIBLE);
            mMessageImageView.setVisibility(View.VISIBLE);
            mCameraImageView.setVisibility(View.VISIBLE);
        }
        return isHit;
    }
 
    //判断是否到达解锁点
    private boolean isHitUnlock() {
        Rect phoneRect = new Rect();
        mPhoneImageView.getHitRect(phoneRect);
        Rect unlockRect = new Rect();
        mUnlockImageView.getHitRect(unlockRect);
        Rect messageRect = new Rect();
        mMessageImageView.getHitRect(messageRect);
        Rect cameraRect = new Rect();
        mCameraImageView.getHitRect(cameraRect);
        //解锁到电话界面
        if(phoneRect.contains(mLastMoveX,mLastMoveY)){
            mStopBoolean = true;
            adStopTwoSecond();
           //结束我们的主Activity界面
            Message msg = new Message();
            msg.what = MainLockActivity.MSG_PHONE_LOCK_SUCESS;
            mainHandler.sendMessageDelayed(msg,2*1000);
//         mainHandler.obtainMessage(MainLockActivity.MSG_PHONE_LOCK_SUCESS).sendToTarget();
           return true;
        }else if(unlockRect.contains(mLastMoveX,mLastMoveY)){
            mStopBoolean = true;
            adStopTwoSecond();
            //结束我们的主Activity界面
            Message msg = new Message();
            msg.what = MainLockActivity.MSG_LOCK_SUCESS;
            mainHandler.sendMessageDelayed(msg,2*1000);
            return true;
        }else if(messageRect.contains(mLastMoveX,mLastMoveY)){
            mStopBoolean = true;
            adStopTwoSecond();
            //结束我们的主Activity界面
            Message msg = new Message();
            msg.what = MainLockActivity.MSG_MESSAGE_LOCK_SUCESS;
            mainHandler.sendMessageDelayed(msg,2*1000);
//          mainHandler.obtainMessage(MainLockActivity.MSG_MESSAGE_LOCK_SUCESS).sendToTarget();
            return true;
        }else if(cameraRect.contains(mLastMoveX,mLastMoveY)){
            mStopBoolean = true;
            adStopTwoSecond();
            //结束我们的主Activity界面
            Message msg = new Message();
            msg.what = MainLockActivity.MSG_CAMERA_LOOK_SUCESS;
            mainHandler.sendMessageDelayed(msg,2*1000);
//          mainHandler.obtainMessage(MainLockActivity.MSG_CAMERA_LOOK_SUCESS).sendToTarget();
            return true;
        }
        return false;
    }
     
    //回退动画时间间隔值
    private static int BACK_DURATION = 20 ;   // 20ms
    //水平方向前进速率
    private static float VE_HORIZONTAL = 0.7f ;  //0.1dip/ms
    //判断松开手指时，是否达到末尾即可以开锁了,是，则开锁，否则，通过一定的算法使其回退。
    private void handleActionUpEvent(MotionEvent event){       
        int x = (int) event.getX() ;   
        int y = (int)event.getY();
        //解锁到电话界面
        if(isHitUnlock()){
        }else {
            mStopBoolean = false;
            //没有成功解锁，以一定的算法使其回退
            //每隔20ms,速率为0.6dip/ms,使当前的图片往后回退一段距离，直到到达最左端  
            mLastMoveX = x ;  //记录手势松开时，当前的坐标位置。
            int distance = x - tv_slider_icon.getRight() ;
            //只有移动了足够距离才回退
            Log.e(TAG,"handleActionUpEvent : mLastMoveX -->" + mLastMoveX + " distance -->" + distance );
            if(distance >= 0)
                mHandler.postDelayed(BackDragImgTask,BACK_DURATION);
            else{  //复原初始场景
                resetViewState();
            }
        }
    }
     
    //暂停两秒
    private void adStopTwoSecond() {
        mPhoneImageView.setVisibility(View.INVISIBLE);
        mUnlockImageView.setVisibility(View.INVISIBLE);
        mCameraImageView.setVisibility(View.INVISIBLE);
        mMessageImageView.setVisibility(View.INVISIBLE);
//      mCanvas.drawBitmap(dragBitmap,2000,null);
        invalidate();
//      try {
//          Thread.sleep(2*1000);
//      } catch (InterruptedException e) {
//          e.printStackTrace();
//      }
    }
     
    //重置初始的状态，显示tv_slider_icon图像，使bitmap不可见
    private void resetViewState(){
        mLastMoveX = 1000;
        mLastMoveY = 1000;
        tv_slider_icon.setVisibility(View.VISIBLE);
        mPhoneImageView.setVisibility(View.INVISIBLE);
        mUnlockImageView.setVisibility(View.INVISIBLE);
        mCameraImageView.setVisibility(View.INVISIBLE);
        mMessageImageView.setVisibility(View.INVISIBLE);
        invalidate();        //重绘最后一次
    }
     
    //通过延时控制当前绘制bitmap的位置坐标
    private Runnable BackDragImgTask = new Runnable(){
        public void run(){
            //一下次Bitmap应该到达的坐标值
            mLastMoveX = mLastMoveX - (int)(BACK_DURATION * VE_HORIZONTAL);
            invalidate();//重绘      
            //是否需要下一次动画 ？ 到达了初始位置，不在需要绘制
            boolean shouldEnd = Math.abs(mLastMoveX - tv_slider_icon.getRight()) <= 8 ;         
            if(!shouldEnd)
                mHandler.postDelayed(BackDragImgTask,BACK_DURATION);
            else { //复原初始场景
                resetViewState();  
            }              
        }
    };
     
    private Handler mHandler =new Handler (){
        public void handleMessage(Message msg){
        }
    };
    //震动一下下咯
    private void virbate(){
        Vibrator vibrator = (Vibrator) mContext.getSystemService(Context.VIBRATOR_SERVICE);
        vibrator.vibrate(200);
    }
    public void setMainHandler(Handler handler){
        mainHandler = handler;//activity所在的Handler对象
    }
}