Java DragEvent.ACTION_DRAG_LOCATION属性代码示例

/**
 * Same as {@link #recordMotionEvent}. It creates a temporary {@link MotionEvent} object
 * using {@param event} for tracking velocity.
 */
void recordDragEvent(long dragStartTime, DragEvent event) {
    final int motionAction;
    switch (event.getAction()) {
        case DragEvent.ACTION_DRAG_STARTED:
            motionAction = MotionEvent.ACTION_DOWN;
            break;
        case DragEvent.ACTION_DRAG_LOCATION:
            motionAction = MotionEvent.ACTION_MOVE;
            break;
        case DragEvent.ACTION_DRAG_ENDED:
            motionAction = MotionEvent.ACTION_UP;
            break;
        default:
            return;
    }
    MotionEvent emulatedEvent = MotionEvent.obtain(dragStartTime, SystemClock.uptimeMillis(),
            motionAction, event.getX(), event.getY(), 0);
    recordMotionEvent(emulatedEvent);
    emulatedEvent.recycle();
}
 

@Override
public boolean onDrag(View view, DragEvent dragEvent) {
    switch (dragEvent.getAction()) {
        case DragEvent.ACTION_DRAG_STARTED:
            AttachmentsProvider provider =
                    AttachmentsProviderFactory.getAttachmentProvider(getContext());
            return mCallback != null && provider.isSupported();
        case DragEvent.ACTION_DRAG_ENTERED:
            setBackgroundColor(ContextCompat.getColor(getContext(), R.color.attachmentOverlay));
            return isValidDragEvent(dragEvent.getClipData());
        case DragEvent.ACTION_DRAG_ENDED:
            setBackgroundColor(ContextCompat.getColor(getContext(), android.R.color.transparent));
            return true;
        case DragEvent.ACTION_DRAG_EXITED:
        case DragEvent.ACTION_DRAG_LOCATION:
            return true;
        case DragEvent.ACTION_DROP:
            if (isValidDragEvent(dragEvent.getClipData())) {
                final List<Attachment> attachments = extractAttachments(dragEvent.getClipData());
                post(() -> mCallback.onAttachmentsDropped(attachments));
                return true;
            }
            // Fallback
    }
    return false;
}
 

private boolean handleDragEvent(final View v, final DragEvent event) {
    switch(event.getAction()) {
        case DragEvent.ACTION_DRAG_STARTED:
        case DragEvent.ACTION_DRAG_ENTERED:
        case DragEvent.ACTION_DRAG_LOCATION:
        case DragEvent.ACTION_DRAG_EXITED:
        case DragEvent.ACTION_DRAG_ENDED:
            return true;

        case DragEvent.ACTION_DROP:
            final String phrase = event.getClipData().getItemAt(0).getText().toString();
            moveViewToCorrectLocationFromDrag(v, phrase);
            return true;

        default:
            return false;
    }
}
 

@Override
public boolean onDragEvent(DragEvent event) {
    switch (event.getAction()) {
        case DragEvent.ACTION_DRAG_STARTED:
            return mEditor != null && mEditor.hasInsertionController();

        case DragEvent.ACTION_DRAG_ENTERED:
            TextView.this.requestFocus();
            return true;

        case DragEvent.ACTION_DRAG_LOCATION:
            final int offset = getOffsetForPosition(event.getX(), event.getY());
            Selection.setSelection((Spannable)mText, offset);
            return true;

        case DragEvent.ACTION_DROP:
            if (mEditor != null) mEditor.onDrop(event);
            return true;

        case DragEvent.ACTION_DRAG_ENDED:
        case DragEvent.ACTION_DRAG_EXITED:
        default:
            return true;
    }
}
 

public boolean onDrag(View v, DragEvent event) {
  final int action = event.getAction();

  switch (action) {
    case DragEvent.ACTION_DRAG_STARTED:
      return dragStart(v, event);
    case DragEvent.ACTION_DRAG_ENTERED:
      return true;
    case DragEvent.ACTION_DRAG_LOCATION:
      return this.dragLocation(v, event);
    case DragEvent.ACTION_DRAG_EXITED:
      return true;
    case DragEvent.ACTION_DROP:
      return this.dragDrop(v, event);
    case DragEvent.ACTION_DRAG_ENDED:
      return true;
    default:
      Log.e("MarkerDragEventListener", "Unknown action type received by OnDragListener.");
      break;
  }
  return false;
}
 

@Override
public boolean onDragEvent(DragEvent event) {
    switch (event.getAction()) {
    case DragEvent.ACTION_DRAG_STARTED:
        //Log.i(TAG, "Drag Started.");
        return onDragStarted(event);
    case DragEvent.ACTION_DRAG_ENTERED:
        Log.i(TAG, "Drag entered ADDV");
        return onDragEntered(event);
    case DragEvent.ACTION_DRAG_LOCATION:
        return onDragMoveOn(event);
    case DragEvent.ACTION_DRAG_EXITED:
        Log.i(TAG, "Drag exited ADDV");
        return onDragExited(event);
    case DragEvent.ACTION_DROP:
        Log.i(TAG, "Drag droped ADDV");
        return onDrop(event);
    case DragEvent.ACTION_DRAG_ENDED:
        //Log.i(TAG, "Drag ended ADDV.");
        return onDragEnded(event);
    }

    return super.onDragEvent(event);
}
 

@Override
public boolean onDragEvent(DragEvent event) {
    switch (event.getAction()) {
    case DragEvent.ACTION_DRAG_STARTED:
        //Log.i(TAG, "DropLV Drag Started.");
        return onDragStarted(event);
    case DragEvent.ACTION_DRAG_ENTERED:
        Log.i(TAG, "Drag entered DropLV.");
        return onDragEntered(event);
    case DragEvent.ACTION_DRAG_LOCATION:
        return onDragMoveOn(event);
    case DragEvent.ACTION_DRAG_EXITED:
        Log.i(TAG, "Drag exited DropLV.");
        return onDragExited(event);
    case DragEvent.ACTION_DROP:
        Log.i(TAG, "Drag droped DropLV.");
        return onDrop(event);
    case DragEvent.ACTION_DRAG_ENDED:
        //Log.i(TAG, "DropLV Drag ended.");
        return onDragEnded(event);
    }

    return super.onDragEvent(event);
}
 

@Override
public boolean onDragEvent(DragEvent event) {
    switch (event.getAction()) {
    case DragEvent.ACTION_DRAG_STARTED:
        //Log.i(TAG, "DropGV Drag Started.");
        return onDragStarted(event);
    case DragEvent.ACTION_DRAG_ENTERED:
        Log.i(TAG, "Drag entered DropGV.");
        return onDragEntered(event);
    case DragEvent.ACTION_DRAG_LOCATION:
        return onDragMoveOn(event);
    case DragEvent.ACTION_DRAG_EXITED:
        Log.i(TAG, "Drag exited DropGV");
        return onDragExited(event);
    case DragEvent.ACTION_DROP:
        Log.i(TAG, "Drag droped DropGV");
        return onDrop(event);
    case DragEvent.ACTION_DRAG_ENDED:
        //Log.i(TAG, "Drag ended DropGV.");
        return onDragEnded(event);
    }

    return super.onDragEvent(event);
}
 

@Override
public boolean onDragEvent (DragEvent event) {
    final int action = event.getAction();

    switch (action) {
        case DragEvent.ACTION_DRAG_STARTED:
            mLastX = event.getX();
            mLastY = event.getY();
            return true;

        case DragEvent.ACTION_DRAG_ENTERED:
            return true;

        case DragEvent.ACTION_DRAG_LOCATION:
            mLastX = event.getX();
            mLastY = event.getY();
            mEventListener.onDriverDragMove(event.getX(), event.getY());
            return true;

        case DragEvent.ACTION_DROP:
            mLastX = event.getX();
            mLastY = event.getY();
            mEventListener.onDriverDragMove(event.getX(), event.getY());
            mEventListener.onDriverDragEnd(mLastX, mLastY);
            return true;
        case DragEvent.ACTION_DRAG_EXITED:
            mEventListener.onDriverDragExitWindow();
            return true;

        case DragEvent.ACTION_DRAG_ENDED:
            mEventListener.onDriverDragCancel();
            return true;

        default:
            return false;
    }
}
 

@Override
public boolean onDrag(View v, DragEvent event) {
    switch(event.getAction()) {
        case DragEvent.ACTION_DRAG_STARTED:
            onDropListener.onDragStarted();
            return true;

        case DragEvent.ACTION_DRAG_ENTERED:
            return true;

        case DragEvent.ACTION_DRAG_LOCATION:
            // Ignore the event
            onDropListener.onDragLocation(event.getX(), event.getY());
            return true;

        case DragEvent.ACTION_DRAG_EXITED:
            return true;

        case DragEvent.ACTION_DROP:
            onDropListener.onDrop();
            return true;

        case DragEvent.ACTION_DRAG_ENDED:
            onDropListener.onDragEnded();
            return true;

        default:
            break;
    }

    return false;
}
 

@Override
public boolean onDrag(View v, DragEvent event) {
    final int action = event.getAction();
    switch (action) {
        case DragEvent.ACTION_DRAG_STARTED: // 拖拽开始
            Log.i("拖拽事件", "拖拽开始");
            return event.getClipDescription().hasMimeType(ClipDescription.MIMETYPE_TEXT_PLAIN);

        case DragEvent.ACTION_DRAG_ENTERED: // 被拖拽View进入目标区域
            Log.i("拖拽事件", "被拖拽View进入目标区域");
            return true;

        case DragEvent.ACTION_DRAG_LOCATION: // 被拖拽View在目标区域移动
            Log.i("拖拽事件", "被拖拽View在目标区域移动___X：" + event.getX() + "___Y：" + event.getY());
            tvTip.setText("X：" + event.getX() + "   Y：" + event.getY());
            return true;

        case DragEvent.ACTION_DRAG_EXITED: // 被拖拽View离开目标区域
            Log.i("拖拽事件", "被拖拽View离开目标区域");
            return true;

        case DragEvent.ACTION_DROP: // 放开被拖拽View
            Log.i("拖拽事件", "放开被拖拽View");
            // 释放拖拽阴影，并获取移动数据
            ClipData.Item item = event.getClipData().getItemAt(0);
            String content = item.getText().toString();
            Toast.makeText(this, content, Toast.LENGTH_SHORT).show();
            return true;

        case DragEvent.ACTION_DRAG_ENDED: // 拖拽完成
            Log.i("拖拽事件", "拖拽完成");
            return true;

        default:
            break;
    }

    return false;
}
 

@Override
public boolean onDragEvent(DragEvent event) {

    int action = event.getAction();

    switch (action) {
        case DragEvent.ACTION_DRAG_STARTED:
            this.animate()
                    .alpha(1f)
                    .setDuration(mShortAnimTime)
                    .setListener(null);
            break;
        case DragEvent.ACTION_DRAG_LOCATION:
            setShadowPosition((int) event.getX());
            break;
        case DragEvent.ACTION_DRAG_ENDED:
            if (mDragFinishListener != null) {
                mDragFinishListener.onDragFinished(mPositionX);
            }
            mPositionX = 0;
            mMinLeft = 0;
            this.animate()
                    .alpha(0f)
                    .setDuration(mShortAnimTime)
                    .setListener(null);

            break;
    }
    return true;
}
 

@Override
public boolean onDrag(View view, DragEvent dragEvent) {
	Log.d("dragEvent", dragEvent.toString());
	switch (dragEvent.getAction()) {
		case DragEvent.ACTION_DRAG_ENDED:
			Log.d("event", "ACTION_DRAG_ENDED");
			dragLayout.setVisibility(View.GONE);
			dragLayout.setBackgroundResource(R.drawable.drag_background);
			return true;
		case DragEvent.ACTION_DRAG_ENTERED:
			Log.d("event", "ACTION_DRAG_ENTERED");
			dragLayout.setBackgroundResource(R.drawable.drag_background_active);
			return true;
		case DragEvent.ACTION_DRAG_EXITED:
			Log.d("event", "ACTION_DRAG_EXITED");
			dragLayout.setBackgroundResource(R.drawable.drag_background);
			return true;
		case DragEvent.ACTION_DRAG_LOCATION:
			Log.d("event", "ACTION_DRAG_LOCATION");
			return true;
		case DragEvent.ACTION_DRAG_STARTED:
			Log.d("event", "ACTION_DRAG_STARTED");
			dragLayout.setVisibility(View.VISIBLE);
			return true;
		case DragEvent.ACTION_DROP:
			Log.d("event", "ACTION_DRAG_DROP");
			handleDropEvent(view, dragEvent);
			return true;
		default:
			Log.e("event", "unknown");
	}

	return false;
}
 

@Override
public boolean onDrag(View view, DragEvent event) {
    // Defines a variable to store the action type for the incoming event
    final int action = event.getAction();
    // Handles each of the expected events
    switch(action) {
        case DragEvent.ACTION_DRAG_STARTED:
            return true;
        case DragEvent.ACTION_DRAG_ENTERED:
            return true;
        case DragEvent.ACTION_DRAG_LOCATION:
            return true;
        case DragEvent.ACTION_DRAG_EXITED:
            return true;
        case DragEvent.ACTION_DROP:
            ClipData cd = event.getClipData();
            String tag = cd.getItemAt(0).getText().toString();
            int id = Integer.parseInt(tag);
            View marker = findViewWithTag(tag);
            //marker.setX(event.getX());
            float x = event.getX() - marker.getWidth()/2;
            float pos = mMarkerMediator.onPositionRequested(id, x);
            mMarkerMediator.onPositionChanged(id, pos);
            invalidate();
            return true;
        case DragEvent.ACTION_DRAG_ENDED:
            return true;
        // An unknown action type was received.
        default:
            Log.e("DragDrop Example","Unknown action type received by OnDragListener.");
            break;
    }

    return false;
}
 

@Override
public boolean onDragEvent(DragEvent event) {
	if (event.getAction() == DragEvent.ACTION_DRAG_LOCATION) {
		return magicListAdapter.onDragEventLocation(event, getPosition((int) event.getY(), true));
	}
	return magicListAdapter.onDragEvent(event);
}