V4 树形结构Adapter封装

app/src/main/AndroidManifest.xml

@@ -69,6 +69,7 @@
             android:name=".activity.dragswipe.DefaultDragAndSwipeActivity"
             android:exported="false" />
         <activity android:name=".activity.scene.GroupDemoActivity" />
+        <activity android:name=".activity.treenode.TreeNodeActivity" />
     </application>
 
 </manifest>

app/src/main/java/com/chad/baserecyclerviewadapterhelper/activity/home/HomeActivity.kt

@@ -17,6 +17,7 @@ import com.chad.baserecyclerviewadapterhelper.activity.itemclick.ItemClickActivi
 import com.chad.baserecyclerviewadapterhelper.activity.loadmore.AutoLoadMoreRefreshUseActivity
 import com.chad.baserecyclerviewadapterhelper.activity.loadmore.NoAutoAutoLoadMoreRefreshUseActivity
 import com.chad.baserecyclerviewadapterhelper.activity.scene.GroupDemoActivity
+import com.chad.baserecyclerviewadapterhelper.activity.treenode.TreeNodeActivity
 import com.chad.baserecyclerviewadapterhelper.activity.upfetch.UpFetchUseActivity
 import com.chad.baserecyclerviewadapterhelper.databinding.ActivityHomeBinding
 import com.chad.baserecyclerviewadapterhelper.entity.HomeEntity
@@ -80,5 +81,6 @@ class HomeActivity : AppCompatActivity() {
 
             HomeEntity(sectionTitle = "场景演示"),
             HomeEntity("Group（ConcatAdapter）", GroupDemoActivity::class.java, R.mipmap.gv_animation),
+            HomeEntity("Tree Node", TreeNodeActivity::class.java, R.mipmap.gv_expandable),
         )
 }

app/src/main/java/com/chad/baserecyclerviewadapterhelper/activity/treenode/TreeNodeActivity.kt

@@ -0,0 +1,184 @@
+package com.chad.baserecyclerviewadapterhelper.activity.treenode
+
+import android.os.Bundle
+import android.view.View
+import android.widget.Toast
+import androidx.recyclerview.widget.ItemTouchHelper
+import androidx.recyclerview.widget.LinearLayoutManager
+import com.chad.baserecyclerviewadapterhelper.activity.home.adapter.HomeTopHeaderAdapter
+import com.chad.baserecyclerviewadapterhelper.activity.treenode.adapter.TreeNodeAdapter
+import com.chad.baserecyclerviewadapterhelper.base.BaseViewBindingActivity
+import com.chad.baserecyclerviewadapterhelper.databinding.ActivityUniversalRecyclerBinding
+import com.chad.baserecyclerviewadapterhelper.entity.MyNodeEntity
+import com.chad.baserecyclerviewadapterhelper.entity.MyNodeLoadingEntity
+import com.chad.library.adapter.base.BaseNode
+import com.chad.library.adapter.base.QuickAdapterHelper
+import com.chad.library.adapter.base.dragswipe.QuickDragAndSwipe
+
+/**
+ * 树形结构演示Adapter
+ *
+ * @author Dboy233
+ */
+class TreeNodeActivity : BaseViewBindingActivity<ActivityUniversalRecyclerBinding>() {
+
+//    val TAG by lazy { localClassName }
+
+    private lateinit var helper: QuickAdapterHelper
+
+    val mAdapter = TreeNodeAdapter()
+
+    val loadingNode = MyNodeLoadingEntity()
+
+    private val quickDragAndSwipe = QuickDragAndSwipe()
+        .setSwipeMoveFlags(ItemTouchHelper.LEFT or ItemTouchHelper.RIGHT)
+
+    override fun initBinding(): ActivityUniversalRecyclerBinding {
+        return ActivityUniversalRecyclerBinding.inflate(
+            layoutInflater
+        )
+    }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        viewBinding.titleBar.title = "Tree Node"
+        viewBinding.titleBar.setOnBackListener { v: View? -> finish() }
+
+        helper = QuickAdapterHelper.Builder(mAdapter)
+            .build()
+            .addBeforeAdapter(HomeTopHeaderAdapter())
+
+        viewBinding.rv.layoutManager =
+            LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false)
+
+        viewBinding.rv.adapter = helper.adapter
+
+        mAdapter.setOnItemClickListener { adapter, view, position ->
+            val item = mAdapter.getItem(position)
+            if (item?.childNodes != null && item.childNodes!!.isEmpty()) {
+                addLoadingNode(item)
+            }
+            //一层层展开
+            mAdapter.switchState(position, 1)
+            //全部子节点展开
+            //mAdapter.switchState(position)
+        }
+
+        mAdapter.setOnItemLongClickListener { adapter, view, position ->
+            val item = mAdapter.getItem(position) ?: return@setOnItemLongClickListener false
+            mAdapter.addNode(item.parentNode!!, getChildNode(item), getChildNodeIndex(item), 1)
+            true
+        }
+
+        quickDragAndSwipe.attachToRecyclerView(viewBinding.rv)
+            .setDataCallback(mAdapter)
+
+        mAdapter.addNodes(getList(), 0)
+
+        Toast.makeText(this, "长按添加Item,Long press to add Item", Toast.LENGTH_SHORT).show()
+    }
+
+    /**
+     * 添加更多节点
+     */
+    private fun addLoadingNode(parentNode: BaseNode) {
+        ///添加loading节点
+        mAdapter.addNode(parentNode, loadingNode)
+        ///模拟异步操作
+        viewBinding.root.postDelayed({
+            ///移除Loading节点
+            mAdapter.remove(loadingNode)
+            ///添加新的节点
+            mAdapter.addNodes(parentNode,moreNode())
+        }, 2000)
+    }
+
+    ///获取更多节点
+    private fun moreNode(): List<BaseNode> {
+        return mutableListOf(
+            MyNodeEntity("new node"),
+            MyNodeEntity("load more node", mutableListOf()),
+            MyNodeEntity("new node")
+        )
+    }
+
+
+    private fun getChildNodeIndex(item: BaseNode): Int {
+        return mAdapter.getChildNodeIndex(item) + 1
+    }
+
+    private fun getChildNode(item: BaseNode): BaseNode {
+        return when (item.nodeType) {
+            TreeNodeAdapter.TYPE_FILE -> {
+                MyNodeEntity(
+                    "new file node"
+                )
+            }
+
+            else -> {
+                MyNodeEntity(
+                    "new folder node",
+                    mutableListOf(
+                        MyNodeEntity(
+                            "new new folder", mutableListOf(
+                                MyNodeEntity(
+                                    "new file node"
+                                )
+                            )
+                        )
+                    )
+                )
+            }
+        }
+    }
+
+    /**
+     * 所有节点用同一个实体类
+     */
+    private fun getList(): List<MyNodeEntity> {
+        return listOf(
+            MyNodeEntity(
+                "My Folders", mutableListOf(
+                    MyNodeEntity(
+                        "My Pictures folder", mutableListOf(
+                            MyNodeEntity("Belle.png"),
+                            MyNodeEntity("Handsome_guy.png"),
+                            MyNodeEntity(
+                                "Private picture folders", mutableListOf(
+                                    MyNodeEntity("凤姐.png")
+                                )
+                            )
+                        )
+                    ),
+                    MyNodeEntity(
+                        "Work Folders", mutableListOf(
+                            MyNodeEntity("life_summary.txt")
+                        )
+                    )
+                )
+            ),
+            MyNodeEntity(
+                "Her folder", mutableListOf(
+                    MyNodeEntity(
+                        "Her picture folder", mutableListOf(
+                            MyNodeEntity(
+                                "Private picture folders", mutableListOf(
+                                    MyNodeEntity("Swimsuit.png")
+                                )
+                            ),
+                            MyNodeEntity("Mountaintop.png"),
+                            MyNodeEntity("Park.png"),
+                        )
+                    ),
+                    MyNodeEntity(
+                        "Her working folder", mutableListOf(
+                            MyNodeEntity("how_to_work_easily.txt")
+                        )
+                    )
+                )
+            ),
+            MyNodeEntity("load more node", mutableListOf())
+        )
+    }
+
+}

app/src/main/java/com/chad/baserecyclerviewadapterhelper/activity/treenode/adapter/TreeNodeAdapter.java

@@ -0,0 +1,97 @@
+package com.chad.baserecyclerviewadapterhelper.activity.treenode.adapter;
+
+import android.content.Context;
+import android.view.ViewGroup;
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import com.chad.baserecyclerviewadapterhelper.R;
+import com.chad.baserecyclerviewadapterhelper.entity.MyNodeEntity;
+import com.chad.library.adapter.base.BaseNode;
+import com.chad.library.adapter.base.BaseTreeNodeAdapter;
+import com.chad.library.adapter.base.dragswipe.listener.DragAndSwipeDataCallback;
+import com.chad.library.adapter.base.viewholder.QuickViewHolder;
+
+/**
+ * @author Dboy233
+ */
+public class TreeNodeAdapter extends BaseTreeNodeAdapter implements DragAndSwipeDataCallback {
+
+    public final static int TYPE_FOLDER = 1;
+
+    public final static int TYPE_FILE = 2;
+
+    public final static int TYPE_LOAD_MORE = 3;
+
+
+    public TreeNodeAdapter() {
+        addItemType(TYPE_FILE, new OnMultiItemAdapterListener<BaseNode, QuickViewHolder>() {
+            @NonNull
+            @Override
+            public QuickViewHolder onCreate(@NonNull Context context, @NonNull ViewGroup parent,
+                    int viewType) {
+                return new QuickViewHolder(R.layout.item_file, parent);
+            }
+
+            @Override
+            public void onBind(@NonNull QuickViewHolder holder, int position,
+                    @Nullable BaseNode item) {
+                if (item instanceof MyNodeEntity) {
+                    holder.setText(R.id.tv, ((MyNodeEntity) item).getName())
+                            .setText(R.id.sub_tv, ((MyNodeEntity) item).getTime().toString());
+                }
+            }
+        }).addItemType(TYPE_FOLDER, new OnMultiItemAdapterListener<BaseNode, QuickViewHolder>() {
+            @NonNull
+            @Override
+            public QuickViewHolder onCreate(@NonNull Context context, @NonNull ViewGroup parent,
+                    int viewType) {
+                return new QuickViewHolder(R.layout.item_folder, parent);
+            }
+
+            @Override
+            public void onBind(@NonNull QuickViewHolder holder, int position,
+                    @Nullable BaseNode item) {
+                if (item==null) {
+                    return;
+                }
+                if (item instanceof MyNodeEntity) {
+                    holder.setText(R.id.tv, ((MyNodeEntity) item).getName());
+                }
+
+                int angle = item.isExpand() ? 0 : -90;
+                holder.getView(R.id.iv).setRotation(angle);
+
+                int nodeDeep = getNodeDepth(item);
+                switch (nodeDeep) {
+                    case 2 -> holder.setImageResource(R.id.iv_head, R.mipmap.head_img1);
+                    case 3 -> holder.setImageResource(R.id.iv_head, R.mipmap.head_img2);
+                    default -> holder.setImageResource(R.id.iv_head, R.mipmap.head_img0);
+                }
+            }
+        });
+
+        //加载更多
+        addItemType(TYPE_LOAD_MORE, new OnMultiItemAdapterListener<BaseNode, QuickViewHolder>() {
+            @Override
+            public void onBind(@NonNull QuickViewHolder holder, int position,
+                    @Nullable BaseNode item) {
+            }
+            @NonNull
+            @Override
+            public QuickViewHolder onCreate(@NonNull Context context, @NonNull ViewGroup parent,
+                    int viewType) {
+                return new QuickViewHolder(R.layout.view_load_more,parent);
+            }
+        });
+    }
+
+    @Override
+    public void dataSwap(int fromPosition, int toPosition) {
+        swap(fromPosition, toPosition);
+    }
+
+    @Override
+    public void dataRemoveAt(int position) {
+        removeAt(position);
+    }
+}

app/src/main/java/com/chad/baserecyclerviewadapterhelper/entity/FileNodeEntity.java

@@ -0,0 +1,50 @@
+package com.chad.baserecyclerviewadapterhelper.entity;
+
+import androidx.annotation.Nullable;
+
+import com.chad.baserecyclerviewadapterhelper.activity.treenode.adapter.TreeNodeAdapter;
+import com.chad.library.adapter.base.BaseNode;
+
+import java.util.Date;
+import java.util.List;
+
+/**
+ * @author Dboy233
+ */
+public class FileNodeEntity extends BaseNode {
+
+    private String name;
+
+    private Date time = new Date();
+
+    public FileNodeEntity(String name) {
+        this.name = name;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public Date getTime() {
+        return time;
+    }
+
+    public void setTime(Date time) {
+        this.time = time;
+    }
+
+    @Override
+    public int getNodeType() {
+        return TreeNodeAdapter.TYPE_FILE;
+    }
+
+    @Nullable
+    @Override
+    public List<BaseNode> getChildNodes() {
+        return null;
+    }
+}