android控件拖动，移动、解决父布局重绘时控件回到原点

最近公司做小游戏开发，写倒计时加进度条 拖动问题private boolean isIntercept = false; /** 按下时的位置控件相对屏幕左上角的位置X */ private int startDownX; /** 按下时的位置控件距离屏幕左上角的位置Y */ private int startDownY; /** 控件相对屏幕左上角移动的位置X */ private int lastMoveX; /** 控件相对屏幕左上角移动的位置Y */ private int lastMoveY; vsv_show.setOnTouchListener(new View.OnTouchListener() {@Overridepublic boolean onTouch(View v, MotionEvent event) {int action = event.getAction();switch (action) {case MotionEvent.ACTION_DOWN:startDownX = lastMoveX = (int) event.getRawX();startDownY = lastMoveY = (int) event.getRawY();break;case MotionEvent.ACTION_MOVE:int dx = (int) event.getRawX() - lastMoveX;int dy = (int) event.getRawY() - lastMoveY;int left = v.getLeft() + dx;int top = v.getTop() + dy;int right = v.getRight() + dx;int bottom = v.getBottom() + dy;if (left < 0) {left = 0;right = left + v.getWidth();}if (right > mScreenWidth) {right = mScreenWidth;left = right - v.getWidth();}if (top < 0) {top = 0;bottom = top + v.getHeight();}if (bottom > mScreenHeight) {bottom = mScreenHeight;top = bottom - v.getHeight();}v.layout(left, top, right, bottom);lastMoveX = (int) event.getRawX();lastMoveY = (int) event.getRawY();break;case MotionEvent.ACTION_UP:int lastMoveDx = Math.abs((int) event.getRawX() - startDownX);int lastMoveDy = Math.abs((int) event.getRawY() - startDownY);if (0 != lastMoveDx || 0 != lastMoveDy) {isIntercept = true;} else {isIntercept = false;}RelativeLayout.LayoutParams lpFeedback = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);lpFeedback.leftMargin = v.getLeft();lpFeedback.topMargin = v.getTop();lpFeedback.setMargins(v.getLeft(), v.getTop(), 0, 0);v.setLayoutParams(lpFeedback);break;}return isIntercept;} });

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