@Override
public boolean onTouchEvent(MotionEvent ev) {
final int action = ev.getAction();
final int x = (int) ev.getX();
final int y = (int) ev.getY();
// [shravan.mahankali] dynamically find the dragger object and let user drag the item
// only if touched on dragger and not otherwise.
if (action == MotionEvent.ACTION_DOWN) {
int startPos = pointToPosition(x, y);
if (startPos != INVALID_POSITION) {
int mItemPosition = startPos - getFirstVisiblePosition();
View grabber = getChildAt(mItemPosition).findViewById(draggerId);
int mDragPointY = y - grabber.getTop();
int[] grabberLocationOnScreen = new int[2];
grabber.getLocationOnScreen(grabberLocationOnScreen);
if (x >= grabber.getLeft()
&& x <= grabber.getRight()
&& mDragPointY >= grabber.getTop()
&& mDragPointY <= grabberLocationOnScreen[1]) mDragMode = true;
}
}
if (!mDragMode) return super.onTouchEvent(ev);
switch (action) {
case MotionEvent.ACTION_DOWN:
mStartPosition = pointToPosition(x, y);
if (mStartPosition != INVALID_POSITION) {
int mItemPosition = mStartPosition - getFirstVisiblePosition();
mDragPointOffset = y - getChildAt(mItemPosition).getTop();
mDragPointOffset -= ((int) ev.getRawY()) - y;
startDrag(mItemPosition, y);
drag(0, y); // replace 0 with x if desired
}
break;
case MotionEvent.ACTION_MOVE:
drag(0, y); // replace 0 with x if desired
break;
case MotionEvent.ACTION_CANCEL:
case MotionEvent.ACTION_UP:
default:
mDragMode = false;
mEndPosition = pointToPosition(x, y);
stopDrag(mStartPosition - getFirstVisiblePosition());
if (mDropListener != null
&& mStartPosition != INVALID_POSITION
&& mEndPosition != INVALID_POSITION) mDropListener.onDrop(mStartPosition, mEndPosition);
break;
}
return true;
}
@Override
public boolean onTouchEvent(MotionEvent ev) {
final int action = ev.getAction();
final int x = (int) ev.getX();
final int y = (int) ev.getY();
if (action == MotionEvent.ACTION_DOWN && x < 40) {
mDragMode = true;
}
if (!mDragMode) return super.onTouchEvent(ev);
switch (action) {
case MotionEvent.ACTION_DOWN:
mStartPosition = pointToPosition(x, y);
if (mStartPosition != INVALID_POSITION) {
int mItemPosition = mStartPosition - getFirstVisiblePosition();
mDragItemY = getChildAt(mItemPosition).getTop();
mDragPointOffset = y - mDragItemY;
mDragPointOffset -= ((int) ev.getRawY()) - y;
startDrag(mItemPosition, y);
drag(x, y);
}
break;
case MotionEvent.ACTION_MOVE:
drag(x, y);
break;
case MotionEvent.ACTION_CANCEL:
case MotionEvent.ACTION_UP:
default:
mDragMode = false;
mEndPosition = pointToPosition(x, y);
stopDrag(mStartPosition - getFirstVisiblePosition(), x, y);
if (mDropListener != null
&& mStartPosition != INVALID_POSITION
&& mEndPosition != INVALID_POSITION) mDropListener.onDrop(mStartPosition, mEndPosition);
break;
}
return true;
}
// enable the drag view for dragging
private void startDrag(int itemIndex, int y) {
stopDrag(itemIndex);
View item = getChildAt(itemIndex);
if (item == null) return;
item.setDrawingCacheEnabled(true);
if (mDragListener != null) mDragListener.onStartDrag(item);
// Create a copy of the drawing cache so that it does not get recycled
// by the framework when the list tries to clean up memory
Bitmap bitmap = Bitmap.createBitmap(item.getDrawingCache());
WindowManager.LayoutParams mWindowParams = new WindowManager.LayoutParams();
mWindowParams.gravity = Gravity.TOP;
mWindowParams.x = 0;
mWindowParams.y = y - mDragPointOffset;
mWindowParams.height = WindowManager.LayoutParams.WRAP_CONTENT;
mWindowParams.width = WindowManager.LayoutParams.WRAP_CONTENT;
mWindowParams.flags =
WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
| WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE
| WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
| WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN
| WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS;
mWindowParams.format = PixelFormat.TRANSLUCENT;
mWindowParams.windowAnimations = 0;
Context context = getContext();
ImageView v = new ImageView(context);
v.setImageBitmap(bitmap);
WindowManager mWindowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
mWindowManager.addView(v, mWindowParams);
mDragView = v;
}
