一個可拖拽變換的Imageview，且可以使其他組件伴隨變換：DragImageView

• 1.每一層必須要用Fragment嵌套DragImageView，如果該層還有其他布局，也要在Fragment內，如果該布局需要隨DragImageView共同變換的話，需要嵌套在RotateRelativeLayout內。

    <FrameLayout
        android:id="@+id/fl_bottom"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
        <info.fangjie.dragimageview.DragImageView
            android:layout_width="fill_parent"
            android:id="@+id/dragview_bottom"
            android:background="#00ffffff"
            android:src="@drawable/cute_or_not_default"
            android:layout_height="fill_parent" />

        <info.fangjie.dragimageview.RotateRelativeLayout
            android:layout_width="fill_parent"
            android:id="@+id/rl_bottom"
            android:layout_height="fill_parent">
            <TextView
                android:layout_width="wrap_content"
                android:gravity="left"
                android:id="@+id/tv_mark_bottom"
                android:textSize="16sp"
                android:layout_centerHorizontal="true"
                android:layout_marginTop="60dp"
                android:textColor="#ffffff"
                android:layout_height="wrap_content" />
        </info.fangjie.dragimageview.RotateRelativeLayout>
    </FrameLayout>

• 2.每一層布局對應一個LayerView

public class MyLayerView extends BaseLayerView {

    MyLayerView(int layerOrder){
        super(layerOrder);
    }

    public RotateRelativeLayout relativeLayout;

    public TextView textView;

}

• 3.每層的DragImagview需要實現 DragListener，實現事件響應。

        layerViewBottom.dragImageView.setDragListener(new DragListener() {
            @Override
            public void onDrag(Matrix matrix, int state) {

            }

            @Override
            public void onDragOutFinish(int direction) {

            }

            @Override
            public void onDragOut(int direction) {

            }

            @Override
            public void onDragReset(int direction) {

            }
        });

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