添加空布局设置功能

donkingliang · Apr 28, 2020 · 75e394c · 75e394c
1 parent 31efeba
commit 75e394c
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Showing 13 changed files with 284 additions and 19 deletions.
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
@@ -24,6 +24,7 @@
         <activity android:name=".activity.VariousActivity" />
         <activity android:name=".activity.VariousChildActivity" />
         <activity android:name=".activity.BindingActivity" />
+        <activity android:name=".activity.EmptyActivity" />
     </application>
 
 </manifest>
diff --git a/app/src/main/java/com/donkingliang/groupedadapterdemo/activity/EmptyActivity.java b/app/src/main/java/com/donkingliang/groupedadapterdemo/activity/EmptyActivity.java
@@ -0,0 +1,66 @@
+package com.donkingliang.groupedadapterdemo.activity;
+
+import android.content.Context;
+import android.content.Intent;
+import android.os.Bundle;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import com.donkingliang.groupedadapter.adapter.GroupedRecyclerViewAdapter;
+import com.donkingliang.groupedadapter.holder.BaseViewHolder;
+import com.donkingliang.groupedadapterdemo.R;
+import com.donkingliang.groupedadapterdemo.adapter.EmptyAdapter;
+
+import androidx.annotation.Nullable;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.recyclerview.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
+
+/**
+ * 没有数据时，显示空布局。
+ */
+public class EmptyActivity extends AppCompatActivity {
+
+    private TextView tvTitle;
+    private RecyclerView rvList;
+    private EmptyAdapter adapter;
+
+    @Override
+    protected void onCreate(@Nullable Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_group_list);
+
+        tvTitle = (TextView) findViewById(R.id.tv_title);
+        rvList = (RecyclerView) findViewById(R.id.rv_list);
+
+        tvTitle.setText(R.string.empty_list);
+
+        rvList.setLayoutManager(new LinearLayoutManager(this));
+        adapter = new EmptyAdapter(this, null);
+        // 显示空布局。默认不显示
+        adapter.showEmptyView(true);
+        adapter.setOnHeaderClickListener(new GroupedRecyclerViewAdapter.OnHeaderClickListener() {
+            @Override
+            public void onHeaderClick(GroupedRecyclerViewAdapter groupedAdapter, BaseViewHolder holder, int groupPosition) {
+                // 清空数据
+                adapter.clear();
+            }
+        });
+        adapter.setOnChildClickListener(new GroupedRecyclerViewAdapter.OnChildClickListener() {
+            @Override
+            public void onChildClick(GroupedRecyclerViewAdapter groupedAdapter, BaseViewHolder holder,
+                                     int groupPosition, int childPosition) {
+                Toast.makeText(EmptyActivity.this, "子项：groupPosition = " + groupPosition
+                                + ", childPosition = " + childPosition,
+                        Toast.LENGTH_LONG).show();
+            }
+        });
+
+        rvList.setAdapter(adapter);
+    }
+
+    public static void openActivity(Context context) {
+        Intent intent = new Intent(context, EmptyActivity.class);
+        context.startActivity(intent);
+    }
+}
diff --git a/app/src/main/java/com/donkingliang/groupedadapterdemo/activity/MainActivity.java b/app/src/main/java/com/donkingliang/groupedadapterdemo/activity/MainActivity.java
@@ -25,6 +25,8 @@ protected void onCreate(Bundle savedInstanceState) {
         findViewById(R.id.btn_various).setOnClickListener(this);
         findViewById(R.id.btn_various_child).setOnClickListener(this);
         findViewById(R.id.btn_binding_adapter).setOnClickListener(this);
+        findViewById(R.id.btn_binding_adapter).setOnClickListener(this);
+        findViewById(R.id.btn_empty_list).setOnClickListener(this);
     }
 
     @Override
@@ -69,6 +71,10 @@ public void onClick(View v) {
             case R.id.btn_binding_adapter:
                 BindingActivity.openActivity(this);
                 break;
+
+            case R.id.btn_empty_list:
+                EmptyActivity.openActivity(this);
+                break;
         }
     }
 }
diff --git a/app/src/main/java/com/donkingliang/groupedadapterdemo/adapter/EmptyAdapter.java b/app/src/main/java/com/donkingliang/groupedadapterdemo/adapter/EmptyAdapter.java
@@ -0,0 +1,79 @@
+package com.donkingliang.groupedadapterdemo.adapter;
+
+import android.content.Context;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.Button;
+
+import com.donkingliang.groupedadapter.holder.BaseViewHolder;
+import com.donkingliang.groupedadapterdemo.R;
+import com.donkingliang.groupedadapterdemo.entity.GroupEntity;
+import com.donkingliang.groupedadapterdemo.model.GroupModel;
+
+import java.util.ArrayList;
+
+/**
+ * 没有数据时，显示空布局
+ */
+public class EmptyAdapter extends GroupedListAdapter {
+
+    public EmptyAdapter(Context context, ArrayList<GroupEntity> groups) {
+        super(context, groups);
+    }
+
+    /**
+     * 返回false表示没有组尾
+     *
+     * @param groupPosition
+     * @return
+     */
+    @Override
+    public boolean hasFooter(int groupPosition) {
+        return false;
+    }
+
+    /**
+     * 当hasFooter返回false时，这个方法不会被调用。
+     *
+     * @return
+     */
+    @Override
+    public int getFooterLayout(int viewType) {
+        return 0;
+    }
+
+    @Override
+    public void onBindHeaderViewHolder(BaseViewHolder holder, int groupPosition) {
+        GroupEntity entity = mGroups.get(groupPosition);
+        holder.setText(R.id.tv_header, entity.getHeader() + "(点击清空数据)");
+    }
+
+    /**
+     * 当hasFooter返回false时，这个方法不会被调用。
+     *
+     * @param holder
+     * @param groupPosition
+     */
+    @Override
+    public void onBindFooterViewHolder(BaseViewHolder holder, int groupPosition) {
+
+    }
+
+    @Override
+    public View getEmptyView(ViewGroup parent) {
+        View view = LayoutInflater.from(mContext).inflate(R.layout.adapter_empty_view, parent, false);
+        Button btnLoadData = view.findViewById(R.id.btn_load_data);
+        btnLoadData.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                setData();
+            }
+        });
+        return view;
+    }
+
+    private void setData() {
+        setGroups(GroupModel.getGroups(10, 5));
+    }
+}
diff --git a/app/src/main/java/com/donkingliang/groupedadapterdemo/adapter/GroupedListAdapter.java b/app/src/main/java/com/donkingliang/groupedadapterdemo/adapter/GroupedListAdapter.java
@@ -15,7 +15,7 @@
  */
 public class GroupedListAdapter extends GroupedRecyclerViewAdapter {
 
-    private ArrayList<GroupEntity> mGroups;
+    protected ArrayList<GroupEntity> mGroups;
 
     public GroupedListAdapter(Context context, ArrayList<GroupEntity> groups) {
         super(context);
@@ -33,6 +33,16 @@ public int getChildrenCount(int groupPosition) {
         return children == null ? 0 : children.size();
     }
 
+    public void clear(){
+        mGroups.clear();
+        notifyDataChanged();
+    }
+
+    public void setGroups(ArrayList<GroupEntity> groups){
+        mGroups = groups;
+        notifyDataChanged();
+    }
+
     @Override
     public boolean hasHeader(int groupPosition) {
         return true;

diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
@@ -98,6 +98,14 @@
                 android:layout_margin="5dp"
                 android:text="@string/binding_adapter"
                 android:textAllCaps="false"/>
+
+            <Button
+                android:id="@+id/btn_empty_list"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_margin="5dp"
+                android:text="@string/empty_list"
+                android:textAllCaps="false"/>
         </LinearLayout>
 
     </ScrollView>

diff --git a/app/src/main/res/layout/adapter_empty_view.xml b/app/src/main/res/layout/adapter_empty_view.xml
@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical">
+
+    <LinearLayout
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center"
+        android:gravity="center"
+        android:orientation="vertical">
+
+        <ImageView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:src="@drawable/group_adapter_empty_view_image" />
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/empty_view"
+            android:textColor="@android:color/black"
+            android:textSize="18sp" />
+
+        <Button
+            android:id="@+id/btn_load_data"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/load_data"
+            android:textColor="@android:color/black"
+            android:textSize="18sp" />
+    </LinearLayout>
+
+
+</FrameLayout>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
@@ -11,5 +11,8 @@
     <string name="various">头、尾和子项都支持多种类型的列表</string>
     <string name="various_child">多种子项类型的列表</string>
     <string name="binding_adapter">使用DataBinding的列表</string>
+    <string name="empty_list">空布局</string>
+    <string name="empty_view">这是个空布局</string>
+    <string name="load_data">加载数据</string>
 
 </resources>
diff --git a/groupedadapter/src/main/AndroidManifest.xml b/groupedadapter/src/main/AndroidManifest.xml
@@ -1,9 +1,4 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.donkingliang.groupedadapter">
 
-    <application
-        android:label="@string/app_name">
-
-    </application>
-
 </manifest>