Java 在android中将阴影拖放到目标上后是否移回原始位置?
onDrag等级:Java 在android中将阴影拖放到目标上后是否移回原始位置?,java,android,drag-and-drop,Java,Android,Drag And Drop,onDrag等级: private class ChoiceDragListener implements OnDragListener { @Override public boolean onDrag(View v, DragEvent event) { switch (event.getAction()) { case DragEvent.ACTION_DRAG_STARTED: // no action neces
private class ChoiceDragListener implements OnDragListener {
@Override
public boolean onDrag(View v, DragEvent event) {
switch (event.getAction()) {
case DragEvent.ACTION_DRAG_STARTED:
// no action necessary
break;
case DragEvent.ACTION_DRAG_ENTERED:
// no action necessary
break;
case DragEvent.ACTION_DRAG_EXITED:
// no action necessary
break;
case DragEvent.ACTION_DROP:
// handle the dragged view being dropped over a drop view
View view = (View) event.getLocalState();
dropTarget = (RelativeLayout) v;
dropped = (RelativeLayout) view;
tagDropped = dropped.getTag().toString();
Log.i("tagDropped", "" + tagDropped);
tagDropTarget = dropTarget.getTag().toString();
Log.i("tagDropTarget", "" + tagDropTarget);
matchTag();
break;
case DragEvent.ACTION_DRAG_ENDED:
// no action necessary
break;
default:
break;
}
return true;
}
}
ChoiceTouchListener类:
private final class ChoiceTouchListener implements OnTouchListener {
public boolean onTouch(View view, MotionEvent motionEvent) {
if (motionEvent.getAction() == MotionEvent.ACTION_DOWN) {
/*
* Drag details: we only need default behavior - clip data could
* be set to pass data as part of drag - shadow can be tailored
*/
ClipData data = ClipData.newPlainText("", "");
DragShadowBuilder shadowBuilder = new View.DragShadowBuilder(
view);
// start dragging the item touched
view.startDrag(data, shadowBuilder, view, 0);
return true;
} else {
return false;
}
}
}
现在我想把物体移动到它被拖动的原始位置
我曾进行过类似的搜索,但没有回答任何问题首先获取拖动器控件和拖动接收器控件之间的距离:
textview1
是拖动控制
textview2
是拖动接收器控件
//if text view2 is below textview one and text view 2 is on the right of text view one
int topMargin=textview2_top_margin - textview1_top_margin
int leftMargin=textview2_left_margin - textview1_left_margin
public void animation() {
Animation animation = new TranslateAnimation(left_margin, 0, topMargin, 0);
animation.setDuration(1000);
controlToAnimate.startAnimation(animation);
}