Question

当我拖动项目时我想在阴影部分显示另一个单词中的文本我想在阴影部分中设置文本（当用户长按并想要放到另一个地方时）！在startdrag中，当我调用myshadow时，我有数据和项目文本我无法在阴影框中设置文本（clor为黄色）。

OnItemLongClickListener listSourceItemLongClickListener = new OnItemLongClickListener() {
@Override
public boolean onItemLongClick(AdapterView<?> l, View v, int position,
        long id) {

    // Selected item is passed as item in dragData
    ClipData.Item item = new ClipData.Item(lv_arr[position]);

    String[] clipDescription = { ClipDescription.MIMETYPE_TEXT_PLAIN };
    ClipData dragData = new ClipData((CharSequence) v.getTag(),
            clipDescription, item);
    DragShadowBuilder myShadow = new MyDragShadowBuilder(v);

    v.startDrag(dragData, // ClipData
            myShadow, // View.DragShadowBuilder
            lv_arr[position], // Object myLocalState
            0); // flags

    // commentMsg = v.getTag() + " : onLongClick.\n";
    // comments.setText(commentMsg);

    return true;
}
}
private static class MyDragShadowBuilder extends View.DragShadowBuilder{
  private static Drawable shadow;

public MyDragShadowBuilder(View v) {
    super(v);
    shadow = new ColorDrawable(Color.LTGRAY);
}

@Override
public void onProvideShadowMetrics(Point size, Point touch) {
    int width = getView().getWidth();
    int height = getView().getHeight();

    shadow.setBounds(0, 0, width, height);
    size.set(width, height);
    touch.set(width / 2, height / 2);
}


@Override
public void onDrawShadow(Canvas canvas) {
    shadow.draw(canvas);
}
}

Answer 1

我相信你可以覆盖onDrawShadow(Canvas canvas)（你实际上已经覆盖了）并使用canvas对象引用来调用方法drawText传递你想要的文本。

试一试。

Answer 2

是的，谢谢你，是的; 我刚补充说，这对我有用！

    @Override
    public void onDrawShadow(Canvas canvas) {

        shadow.draw(canvas);
        super.onDrawShadow(canvas);

    }

我如何在Android的阴影框中显示文本项？

2 个答案: