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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);
}
}
}
}
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