下面列出了怎么用android.view.View.DragShadowBuilder的API类实例代码及写法,或者点击链接到github查看源代码。
@Override
public void run() {
view.post(new Runnable() {
@Override
public void run() {
mPointToPosition = -1;
mSwiping = false;
mItemPressed = false;
ClipData data = ClipData.newPlainText("", "");
DragShadowBuilder sb = new View.DragShadowBuilder(view);
view.startDrag(data, sb, new Reference<View>(view), 0);
}
});
}
public boolean onTouch(View view, MotionEvent motionEvent) {
if (motionEvent.getAction() == MotionEvent.ACTION_DOWN) {
ClipData data = ClipData.newPlainText("", "");
DragShadowBuilder shadowBuilder = new View.DragShadowBuilder(
view);
view.startDrag(data, shadowBuilder, view, 0);
view.setVisibility(View.INVISIBLE);
return true;
} else {
return false;
}
}
@Override
public boolean onTouch(View view, MotionEvent motionEvent) {
// start move on a touch event
if (motionEvent.getAction() == MotionEvent.ACTION_DOWN) {
ClipData data = ClipData.newPlainText("", "");
DragShadowBuilder shadowBuilder = new View.DragShadowBuilder(view);
view.startDrag(data, shadowBuilder, view, 0);
view.setVisibility(View.INVISIBLE);
return true;
}
return false;
}
@Override
public boolean onTouch(View view, MotionEvent motionEvent) {
// start move on a touch event
if (motionEvent.getAction() == MotionEvent.ACTION_DOWN) {
ClipData data = ClipData.newPlainText("", "");
DragShadowBuilder shadowBuilder = new View.DragShadowBuilder(view);
view.startDrag(data, shadowBuilder, view, 0);
view.setVisibility(View.INVISIBLE);
return true;
}
return false;
}
@Override
public boolean onLongClick(View view) {
// Find the position of the preview relative to the touch location.
WidgetImageView img = mWidgetCell.getWidgetView();
// If the ImageView doesn't have a drawable yet, the widget preview hasn't been loaded and
// we abort the drag.
if (img.getBitmap() == null) {
return false;
}
Rect bounds = img.getBitmapBounds();
bounds.offset(img.getLeft() - (int) mLastTouchPos.x, img.getTop() - (int) mLastTouchPos.y);
// Start home and pass the draw request params
PinItemDragListener listener = new PinItemDragListener(mRequest, bounds,
img.getBitmap().getWidth(), img.getWidth());
Intent homeIntent = new Intent(Intent.ACTION_MAIN)
.addCategory(Intent.CATEGORY_HOME)
.setPackage(getPackageName())
.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
.putExtra(PinItemDragListener.EXTRA_PIN_ITEM_DRAG_LISTENER, listener);
if (!PreferencesState.isAllowRotationPrefEnabled(this) &&
(getResources().getConfiguration().orientation ==
Configuration.ORIENTATION_LANDSCAPE && !isInMultiWindowMode())) {
// If we are starting the drag in landscape even though home is locked in portrait,
// restart the home activity to temporarily allow rotation.
homeIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);
}
startActivity(homeIntent,
ActivityOptions.makeCustomAnimation(this, 0, android.R.anim.fade_out).toBundle());
// Start a system drag and drop. We use a transparent bitmap as preview for system drag
// as the preview is handled internally by launcher.
ClipDescription description = new ClipDescription("", new String[]{listener.getMimeType()});
ClipData data = new ClipData(description, new ClipData.Item(""));
view.startDragAndDrop(data, new DragShadowBuilder(view) {
@Override
public void onDrawShadow(Canvas canvas) { }
@Override
public void onProvideShadowMetrics(Point outShadowSize, Point outShadowTouchPoint) {
outShadowSize.set(SHADOW_SIZE, SHADOW_SIZE);
outShadowTouchPoint.set(SHADOW_SIZE / 2, SHADOW_SIZE / 2);
}
}, null, View.DRAG_FLAG_GLOBAL);
return false;
}
/** See {@link View#startDragAndDrop(ClipData, DragShadowBuilder, Object, int)}. */
public static boolean startDragAndDrop(View view, ClipData data,
DragShadowBuilder shadowBuilder, Object myLocalState, int flags) {
return view.startDragAndDrop(data, shadowBuilder, myLocalState, flags);
}