Android提高之多方向抽屉实现方法

OnTouchListener touchListener = new OnTouchListener() { int initX; int initY; boolean setInitialPosition; public boolean onTouch(View v, MotionEvent event) { if (mState == State.ANIMATING) {  // we are animating  return false; }//  Log.d(TAG, "state: " + mState + " x: " + event.getX() + " y: " + event.getY()); int action = event.getAction(); if (action == MotionEvent.ACTION_DOWN) {  if (mBringToFront) {  bringToFront();  }  initX = 0;  initY = 0;  if (mContent.getVisibility() == GONE) {  // since we may not know content dimensions we use factors here  if (mOrientation == VERTICAL) {   initY = mPosition == TOP? -1 : 1;  } else {   initX = mPosition == LEFT? -1 : 1;  }  }  setInitialPosition = true; } else {  if (setInitialPosition) {  // now we know content dimensions, so we multiply factors...  initX *= mContentWidth;  initY *= mContentHeight;  // ... and set initial panel's position  mGestureListener.setScroll(initX, initY);  setInitialPosition = false;  // for offsetLocation we have to invert values  initX = -initX;  initY = -initY;  }  // offset every ACTION_MOVE & ACTION_UP event   event.offsetLocation(initX, initY); } if (!mGestureDetector.onTouchEvent(event)) {  if (action == MotionEvent.ACTION_UP) {  // tup up after scrolling  post(startAnimation);  } } return false; }};

OnTouchListener touchListener = new OnTouchListener() { float touchX, touchY; public boolean onTouch(View v, MotionEvent event) { if (mState == State.ANIMATING) {  // we are animating  return false; } int action = event.getAction(); if (action == MotionEvent.ACTION_DOWN) {  if (mBringToFront) {  bringToFront();  }  touchX = event.getX();  touchY = event.getY(); } if (!mGestureDetector.onTouchEvent(event)) {  if (action == MotionEvent.ACTION_UP) {  // tup up after scrolling  int size = (int) (Math.abs(touchX - event.getX()) + Math   .abs(touchY - event.getY()));  if (size == mContentWidth || size == mContentHeight) {   mState = State.ABOUT_TO_ANIMATE;   //Log.e("size", String.valueOf(size));   //Log.e(String.valueOf(mContentWidth),String.valueOf(mContentHeight));  }  post(startAnimation);  } } return false; }};