android-drag-FlowLayout

By default, all items are draggable. To disable dragging for specific items, ensure the data object associated with that item implements the IDraggable interface and returns false for isDraggable().

// Data entity implementing IDraggable
private static class TestBean implements IDraggable {
    String text;
    boolean draggable = true; 

    public TestBean(String text) {
        this.text = text;
    }

    @Override
    public boolean isDraggable() {
        return draggable;
    }
}

To use DragFlowLayout, add the JitPack repository to your root build.gradle file and then implement the dependency. If you are using AndroidX, use the version suffix -x (e.g., 1.8.8-x).

// root gradle
allprojects {
    repositories {
        maven { url "https://jitpack.io" }
    }
}

// implementation
implementation 'com.github.LightSun:android-drag-FlowLayout:1.8.8-x'

Include the DragFlowLayout component in your XML layout file using its full package name.

<com.heaven7.android.dragflowlayout.DragFlowLayout
    android:id="@+id/drag_flowLayout"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">
</com.heaven7.android.dragflowlayout.DragFlowLayout>

Use setOnItemClickListener with ClickToDeleteItemListenerImpl to handle clicks. This specific implementation allows you to define a callback for when a delete action (e.g., clicking a close button within an item) is successful.

mDragflowLayout.setOnItemClickListener(new ClickToDeleteItemListenerImpl(R.id.iv_close){
     // Callback when deletion is successful
    @Override
    protected void onDeleteSuccess(DragFlowLayout dfl, View child, Object data) {
       // your code to remove data from your source list
    }
});

You can listen to changes in the layout's drag state or observe when views are added or removed from the layout.

// Set drag state listener
mDragflowLayout.setOnDragStateChangeListener(new DragFlowLayout.OnDragStateChangeListener() {
    @Override
    public void onDragStateChange(DragFlowLayout dfl, int dragState) {
        System.out.println("on drag state change : dragState = " + dragState);
    }
});

// Add view observer
mDragflowLayout.addViewObserver(new IViewObserver() {
    @Override
    public void onAddView(View child, int index) {
        Logger.i(TAG, "onAddView", "index = " + index);
    }
    @Override
    public void onRemoveView(View child, int index) {
        Logger.i(TAG, "onRemoveView", "index = " + index);
    }
});