### Alternative Gradle Configuration for DragFlowLayout Source: https://github.com/lightsun/android-drag-flowlayout/blob/master/README.md This snippet provides an alternative or older Gradle configuration for integrating the DragFlowLayout library, using jcenter() for repositories and the 'compile' keyword for dependency declaration. This might be relevant for projects using older Gradle versions or build setups. ```Gradle repositories { jcenter() } // if you use androidx . please use '1.8.8-x' compile 'com.heaven7.android.dragflowlayout:dragflowlayout:1.8.8' ``` -------------------------------- ### Implement Item Click Listener and DragAdapter Source: https://github.com/lightsun/android-drag-flowlayout/blob/master/README.md This comprehensive example shows how to set both an item click listener and a DragAdapter for the DragFlowLayout. The DragAdapter is crucial for managing item data, binding data to views, and defining the item layout. It also demonstrates how to dynamically control item visibility based on the drag state and data properties. ```Java //用这个处理点击事件 mDragflowLayout.setOnItemClickListener(new ClickToDeleteItemListenerImpl(R.id.iv_close){ @Override protected void onDeleteSuccess(DragFlowLayout dfl, View child, Object data) { //your code } }); //DragAdapter 泛型参数就是为了每个Item绑定一个对应的数据。通常很可能是json转化过来的bean对象 mDragflowLayout.setDragAdapter(new DragAdapter() { @Override //获取你的item布局Id public int getItemLayoutId() { return R.layout.item_drag_flow; } //绑定对应item的数据 @Override public void onBindData(View itemView, int dragState, TestBean data) { itemView.setTag(data); TextView tv = (TextView) itemView.findViewById(R.id.tv_text); tv.setText(data.text); //iv_close是关闭按钮。只有再非拖拽空闲的情况下才显示 itemView.findViewById(R.id.iv_close).setVisibility( dragState!= DragFlowLayout.DRAG_STATE_IDLE && data.draggable ? View.VISIBLE : View.INVISIBLE); } //根据指定的child获取对应的数据。 @NonNull @Override public TestBean getData(View itemView) { return (TestBean) itemView.getTag(); } }); ``` -------------------------------- ### Implement Drag State Change Listener and View Observer Source: https://github.com/lightsun/android-drag-flowlayout/blob/master/README.md This example demonstrates how to set a drag state change listener and add a view observer to the DragFlowLayout. The OnDragStateChangeListener allows developers to react to changes in the layout's drag state, while the IViewObserver provides callbacks for when views are added or removed from the layout, enabling dynamic UI updates. ```Java //设置拖拽状态监听器 mDragflowLayout.setOnDragStateChangeListener(new DragFlowLayout.OnDragStateChangeListener() { @Override public void onDragStateChange(DragFlowLayout dfl, int dragState) { System.out.println("on drag state change : dragState = " + dragState); } }); //添加view观察者 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); } }); ``` -------------------------------- ### Configure DragFlowLayout in Gradle and XML Source: https://github.com/lightsun/android-drag-flowlayout/blob/master/README.md This snippet provides the necessary Gradle and XML configurations to integrate the android-drag-FlowLayout library into an Android project. It includes adding the JitPack repository to the root build.gradle and the library dependency to the app's build.gradle, along with the XML declaration for the DragFlowLayout in a layout file. ```Gradle //root gradle allprojects { repositories { maven { url "https://jitpack.io" } } } // if you use androidx . please use '1.8.8-x' implementation 'com.github.LightSun:android-drag-FlowLayout:1.8.8' ``` ```XML ``` -------------------------------- ### DragFlowLayout API Reference Source: https://github.com/lightsun/android-drag-flowlayout/blob/master/README.md Provides a comprehensive list of public methods available in the DragFlowLayout class, including setters for listeners, state management, and item manipulation. Each method's purpose is briefly described. ```APIDOC DragFlowLayout Class: setOnDragStateChangeListener(l: OnDragStateChangeListener) Description: Sets the drag state listener. getDragState(): @DragState int Description: Retrieves the current drag state. setOnItemClickListener(l: OnItemClickListener) Description: Sets the item click event handler. setDragAdapter(adapter: DragAdapter) Description: Sets the data adapter. getDragItemManager(): DragItemManager Description: Gets the item manager for CRUD operations (create, read, update, delete). setDraggable(draggable: boolean) Description: Sets whether the layout is globally draggable. If false, long-press drag is disabled. prepareItemsByCount(count: int) Description: Sets the number of cached views to avoid repeated item view creation. beginDrag() Description: Marks the start of dragging, changing the drag state to draggable. finishDrag() Description: Marks the end of dragging, automatically setting the drag state to DRAG_STATE_IDLE. ``` -------------------------------- ### Java: Implementing onDeleteSuccess Callback for Item Deletion Source: https://github.com/lightsun/android-drag-flowlayout/blob/master/README.md Demonstrates how to set an OnItemClickListener using ClickToDeleteItemListenerImpl and override the onDeleteSuccess method. This callback is invoked when an item is successfully deleted, allowing custom logic to be executed after the deletion. ```java mDragflowLayout.setOnItemClickListener(new ClickToDeleteItemListenerImpl(R.id.iv_close){ @Override protected void onDeleteSuccess(DragFlowLayout dfl, View child, Object data) { //your code } }); ``` -------------------------------- ### Pre-store Item Views in DragFlowLayout Source: https://github.com/lightsun/android-drag-flowlayout/blob/master/README.md This snippet shows how to pre-store a specified number of item views in the DragFlowLayout. By calling prepareItemsByCount, the layout can reuse these pre-created views, which helps to optimize performance and reduce the overhead of frequent view inflation. ```Java //预存指定个数的Item. 这些Item会反复使用 mDragflowLayout.prepareItemsByCount(10); ``` -------------------------------- ### Handle Item Click Events in DragFlowLayout Source: https://github.com/lightsun/android-drag-flowlayout/blob/master/README.md This code snippet demonstrates how to set an item click listener on the DragFlowLayout. It uses a ClickToDeleteItemListenerImpl to handle clicks, specifically providing a callback for successful item deletion. This allows custom logic to be executed when an item is clicked and potentially deleted. ```Java mDragflowLayout.setOnItemClickListener(new ClickToDeleteItemListenerImpl(R.id.iv_close){ //点击删除成功时回调 @Override protected void onDeleteSuccess(DragFlowLayout dfl, View child, Object data) { //your code } }); ``` -------------------------------- ### Control Item Dragability with IDraggable Interface Source: https://github.com/lightsun/android-drag-flowlayout/blob/master/README.md This snippet illustrates how to make individual items non-draggable by implementing the IDraggable interface in the data model. By setting the isDraggable() method to return false for specific items, developers can selectively prevent them from being dragged within the DragFlowLayout. ```Java //数据实体实现IDraggable (是否可拖拽) 接口，并且 isDraggable 为false即可 private static class TestBean implements IDraggable{ String text; boolean draggable = true; public TestBean(String text) { this.text = text; } @Override public boolean isDraggable() { return draggable; } } ``` === COMPLETE CONTENT === This response contains all available snippets from this library. No additional content exists. Do not make further requests.