标签：
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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public
class
PullDoorView extends
RelativeLayout { private
Context mContext; private
Scroller mScroller; private
int
mScreenWidth = 0;
private
int
mScreenHeigh = 0;
private
int
mLastDownY = 0;
private
int
mCurryY; private
int
mDelY; private
boolean
mCloseFlag = false;
private
ImageView mImgView; public
PullDoorView(Context context) { super(context);
mContext
= context; setupView();
}
public
PullDoorView(Context context, AttributeSet attrs) { super(context,
attrs); mContext
= context; setupView();
}
@SuppressLint("NewApi")
private
void
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 = new
BounceInterpolator(); mScroller
= new
Scroller(mContext, polator); //
获取屏幕分辨率 WindowManager
wm = (WindowManager) (mContext .getSystemService(Context.WINDOW_SERVICE));
DisplayMetrics
dm = new
DisplayMetrics(); 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
= new
ImageView(mContext); mImgView.setLayoutParams(new
LayoutParams(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 public
void
setBgImage(int
id) { mImgView.setImageResource(id);
}
//
设置推动门背景 public
void
setBgImage(Drawable drawable) { mImgView.setImageDrawable(drawable);
}
//
推动门的动画 public
void
startBounceAnim(int
startY, int
dy, int
duration) { mScroller.startScroll(0,
startY, 0,
dy, duration); invalidate();
}
@Override public
boolean
onTouchEvent(MotionEvent event) { int
action = event.getAction(); switch
(action) { case
MotionEvent.ACTION_DOWN: mLastDownY
= (int)
event.getY(); System.err.println("ACTION_DOWN="
+ mLastDownY); return
true;
case
MotionEvent.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;
case
MotionEvent.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;
}
return
super.onTouchEvent(event);
}
@Override public
void
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)）
标签：
原文地址：http://blog.csdn.net/u014311070/article/details/42646447
