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Android特效开发（仿zaker用手向上推动的效果(推动门效果)）

2024-11-02 06:16:02   211人阅读

Android特效开发（仿zaker用手向上推动的效果(推动门效果)）

[1].[代码] [Java]代码 跳至 [1]

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publicclass PullDoorView extendsRelativeLayout { 
   
    privateContext mContext; 
   
    privateScroller mScroller; 
   
    privateint mScreenWidth = 0; 
   
    privateint mScreenHeigh = 0; 
   
    privateint mLastDownY = 0; 
   
    privateint mCurryY; 
   
    privateint mDelY; 
   
    privateboolean mCloseFlag = false; 
   
    privateImageView mImgView; 
   
    publicPullDoorView(Context context) { 
        super(context); 
        mContext = context; 
        setupView(); 
    } 
   
    publicPullDoorView(Context context, AttributeSet attrs) { 
        super(context, attrs); 
        mContext = context; 
        setupView(); 
    } 
   
    @SuppressLint("NewApi") 
    privatevoid setupView() { 
   
        // 这个Interpolator你可以设置别的 我这里选择的是有弹跳效果的Interpolator 
        Interpolator polator = newBounceInterpolator(); 
        mScroller = newScroller(mContext, polator); 
   
        // 获取屏幕分辨率 
        WindowManager wm = (WindowManager) (mContext 
                .getSystemService(Context.WINDOW_SERVICE)); 
        DisplayMetrics dm = newDisplayMetrics(); 
        wm.getDefaultDisplay().getMetrics(dm); 
        mScreenHeigh = dm.heightPixels; 
        mScreenWidth = dm.widthPixels; 
   
        // 这里你一定要设置成透明背景,不然会影响你看到底层布局 
        this.setBackgroundColor(Color.argb(0,0,0,0)); 
        mImgView = newImageView(mContext); 
        mImgView.setLayoutParams(newLayoutParams(LayoutParams.MATCH_PARENT, 
                LayoutParams.MATCH_PARENT)); 
        mImgView.setScaleType(ImageView.ScaleType.FIT_XY);// 填充整个屏幕 
        mImgView.setImageResource(R.drawable.bg1);// 默认背景 
        addView(mImgView); 
    } 
   
    // 设置推动门背景 
    publicvoid setBgImage(intid) { 
        mImgView.setImageResource(id); 
    } 
   
    // 设置推动门背景 
    publicvoid setBgImage(Drawable drawable) { 
        mImgView.setImageDrawable(drawable); 
    } 
   
    // 推动门的动画 
    publicvoid startBounceAnim(intstartY, intdy, intduration) { 
        mScroller.startScroll(0, startY, 0, dy, duration); 
        invalidate(); 
    } 
   
    @Override 
    publicboolean onTouchEvent(MotionEvent event) { 
        intaction = event.getAction(); 
        switch(action) { 
        caseMotionEvent.ACTION_DOWN: 
            mLastDownY = (int) event.getY(); 
            System.err.println("ACTION_DOWN="+ mLastDownY); 
            returntrue; 
        caseMotionEvent.ACTION_MOVE: 
            mCurryY = (int) event.getY(); 
            System.err.println("ACTION_MOVE="+ mCurryY); 
            mDelY = mCurryY - mLastDownY; 
            // 只准上滑有效 
            if(mDelY < 0) { 
                scrollTo(0, -mDelY); 
            } 
            System.err.println("-------------  " + mDelY); 
   
            break; 
        caseMotionEvent.ACTION_UP: 
            mCurryY = (int) event.getY(); 
            mDelY = mCurryY - mLastDownY; 
            if(mDelY < 0) { 
   
                if(Math.abs(mDelY) > mScreenHeigh / 2) { 
   
                    // 向上滑动超过半个屏幕高的时候 开启向上消失动画 
                    startBounceAnim(this.getScrollY(), mScreenHeigh, 450); 
                    mCloseFlag = true; 
   
                }else{ 
                    // 向上滑动未超过半个屏幕高的时候 开启向下弹动动画 
                    startBounceAnim(this.getScrollY(), -this.getScrollY(),1000); 
   
                } 
            } 
   
            break; 
        } 
        returnsuper.onTouchEvent(event); 
    } 
   
    @Override 
    publicvoid computeScroll() { 
   
        if(mScroller.computeScrollOffset()) { 
            scrollTo(mScroller.getCurrX(), mScroller.getCurrY()); 
            Log.i("scroller","getCurrX()= " + mScroller.getCurrX() 
                    +"     getCurrY()=" + mScroller.getCurrY() 
                    +"  getFinalY() =  " + mScroller.getFinalY()); 
            // 不要忘记更新界面 
            postInvalidate(); 
        }else{ 
            if(mCloseFlag) { 
                this.setVisibility(View.GONE); 
            } 
        } 
    } 
   
}

Android特效开发（仿zaker用手向上推动的效果(推动门效果)）


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