Question

我有一个OnDragListener，我通过Onlongclick视图在此侦听器上放置了视图，但是要解决的问题是我想将视图限制在布局视图之外，可以吗？对于视图的不同参数（根据可拖动对象的长度和宽度的不同），甚至可以将其放置在布局的外面一点点当视图在拖动侦听器布局上拖动时，也试图在输入框中获取当前运行时坐标x y的位置

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);


    final ImageView imgVW = (ImageView) findViewById(R.id.imageView);
    final TextView txtVW = (TextView) findViewById(R.id.textView);





    txtVW.setOnLongClickListener(this);

    imgVW.setOnLongClickListener(this);

    findViewById(R.id.layout3).setOnDragListener(this);




}

@Override
public boolean onDrag(View v, DragEvent event) {

    int action = event.getAction();

    switch (action) {

        case DragEvent.ACTION_DRAG_STARTED:

            if (event.getClipDescription().hasMimeType(ClipDescription.MIMETYPE_TEXT_PLAIN)) {

                return true;
            }

            return false;

        case DragEvent.ACTION_DRAG_ENTERED:

            v.invalidate();
            return true;

        case DragEvent.ACTION_DRAG_LOCATION:

            return true;

        case DragEvent.ACTION_DRAG_EXITED:

            v.invalidate();
            return true;

        case DragEvent.ACTION_DROP:

            ClipData.Item item = event.getClipData().getItemAt(0);

            String dragData = item.getText().toString();

            Toast.makeText(this, "Dragged data is " + dragData, Toast.LENGTH_SHORT).show();



            float X=event.getX();
            float Y=event.getY();
            v.invalidate();


            View vw = (View) event.getLocalState();
            ViewGroup owner = (ViewGroup) vw.getParent();
            owner.removeView(vw);

            RelativeLayout container = (RelativeLayout) v;


            vw.setX(X-(vw.getWidth()/2));
            vw.setY(Y-(vw.getHeight()/2));
            container.addView(vw);


            return true;

        case DragEvent.ACTION_DRAG_ENDED:

            v.invalidate();

            if (event.getResult()) {

                Toast.makeText(this, "The drop was handled.", Toast.LENGTH_SHORT).show();

            }

            else
                Toast.makeText(this, "The drop didn't work.", Toast.LENGTH_SHORT).show();

            return true;
        default:
            Log.e("DragDrop Example", "Unknown action type received by OnDragListener.");
            break;
    }

    return true;
}

@Override
public boolean onLongClick(View v) {

    ClipData.Item item = new ClipData.Item((CharSequence) v.getTag());

    String[] mimeTypes = {ClipDescription.MIMETYPE_TEXT_PLAIN};
    ClipData data = new ClipData(v.getTag().toString(), mimeTypes, item);

    View.DragShadowBuilder dragshadow = new View.DragShadowBuilder(v);

    v.startDrag(data
            , dragshadow
            , v
            , 0
    );



    return true;
}

dont want to be placed out of layout like this

I want user to place views full inside the layout like this

Answer 1

const getLocalitation = async () =>{
    console.log('DENTRO DE GetLocalitaion');

    const geoOptions={
        enableHighAccuracy: true,
        timeOut: 10000
    };

    const coordenates =  navigator.geolocation.getCurrentPosition( geoSucces,goFailure, geoOptions);
    console.log('DESPUES DE COORDENATES');

    return coordenates;
}

检查X拖动点和视图长度的总和是否超过拖动容器的长度。如果是，则从拖动容器的宽度中减去视图宽度以获取X点，这将限制某些零件视图放置在拖动容器的外部。否则，拖动X点应足以将视图放置在拖动容器中。

        RelativeLayout container = (RelativeLayout) v;

与使用两个视图的高度数据的Y约束相同。

            if((X+vw.getWidth())>container.getWidth())
              vw.setX(container.getWidth()-vw.getWidth());
            else
              vw.setX(X);

您可以根据需要设置其他条件。

限制用户将视图拖出Android拖放中的布局

1 个答案: