very poor drag, or it barely can drag the images

[hatimmakki]

Hi

Edit :

The issue is ( The DragLinearLayout doesn't work with ScrollView )

I am adding ImageViews programatically, but the images can barely drag. it require very long press, sometimes it works and sometimes doesn't.

this is the adding function

Java

private void appendImageToLinearLayout(DragLinearLayout layout,
                                       ParseFile parseFileImage,
                                       int w, int h,
                                       boolean fullWidth,
                                       boolean isPostImage,
                                       final int position)
        throws ParseException, IOException {

    ImageView imageView= new ImageView(this);
    //imageView.setBackgroundResource(R.drawable.ic_action_search);
    imageView.setImageBitmap(

            ImageTools.
                    getBitmapFromUri(Uri.fromFile(
                            parseFileImage.getFile()),
                            this, fullWidth
                    )
    );

    // params
    //DragLinearLayout.LayoutParams viewParamsCenter =
            new DragLinearLayout.LayoutParams(
                    w,
                    h);
    //viewParamsCenter.gravity = Gravity.CENTER_HORIZONTAL | Gravity.RIGHT;

    //imageView.setLayoutParams(viewParamsCenter);
    imageView.setId(position);
    imageView.setContentDescription(imageList.get(position).getObjectId());
    layout.addDragView(imageView, imageView);

    //layout.setViewDraggable(imageView, imageView);

    if(isPostImage){

        imageView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //showImageFullScreen(position);
                Toast.makeText(EditPostActivity.this, "clicked " + v.getId(), Toast.LENGTH_SHORT).show();
            }
        });
    }
}

XML

<ScrollView
    android:id="@+id/llCanvusContainer"
    android:layout_width="0dp"
    android:layout_height="0dp"
    android:layout_marginTop="8dp"
    android:background="@android:color/white"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toBottomOf="@+id/switchIsPublic">

    <com.jmedeisis.draglinearlayout.DragLinearLayout
        android:id="@+id/llCanvus"
        style="@style/Gallery19crollbarStyle"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="16dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/switchIsPublic" />

</ScrollView>

The images show correctly, but the dragging doesn't work correctly.

#note:
the drag and drop works fine when I remove the ScrollView