Merge pull request XRecyclerView#48 from mahuafactory/master

支持setEmptyView
wk5941 · Mar 17, 2016 · bc4eb79 · bc4eb79
2 parents 98a19b6 + ed1c1d1
commit bc4eb79
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Showing 6 changed files with 126 additions and 2 deletions.
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
@@ -28,6 +28,10 @@
             android:name=".StaggeredGridActivity"
             android:label="@string/app_name" >
         </activity>
+        <activity
+            android:name=".EmptyViewActivity"
+            android:label="@string/app_name" >
+        </activity>
     </application>
 
 </manifest>
diff --git a/app/src/main/java/com/example/xrecyclerview/EmptyViewActivity.java b/app/src/main/java/com/example/xrecyclerview/EmptyViewActivity.java
@@ -0,0 +1,66 @@
+package com.example.xrecyclerview;
+
+import android.os.Bundle;
+import android.os.Handler;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.LinearLayoutManager;
+import android.view.LayoutInflater;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.View;
+import android.view.ViewGroup;
+
+import com.jcodecraeer.xrecyclerview.ProgressStyle;
+import com.jcodecraeer.xrecyclerview.XRecyclerView;
+
+import java.util.ArrayList;
+
+public class EmptyViewActivity extends AppCompatActivity {
+    private XRecyclerView mRecyclerView;
+    private MyAdapter mAdapter;
+    private ArrayList<String> listData;
+    private View mEmptyView;
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_recyclerview);
+        mRecyclerView = (XRecyclerView)this.findViewById(R.id.recyclerview);
+        LinearLayoutManager layoutManager = new LinearLayoutManager(this);
+        layoutManager.setOrientation(LinearLayoutManager.VERTICAL);
+        mRecyclerView.setLayoutManager(layoutManager);
+
+        mEmptyView = findViewById(R.id.text_empty);
+
+        mRecyclerView.setEmptyView(mEmptyView);
+
+        //没有数据，触发emptyView
+        listData = new  ArrayList<String>();
+        mAdapter = new MyAdapter(listData);
+
+        mRecyclerView.setAdapter(mAdapter);
+    }
+
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        // Inflate the menu; this adds items to the action bar if it is present.
+        getMenuInflater().inflate(R.menu.menu_main, menu);
+        return true;
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        // Handle action bar item clicks here. The action bar will
+        // automatically handle clicks on the Home/Up button, so long
+        // as you specify a parent activity in AndroidManifest.xml.
+        int id = item.getItemId();
+
+        //noinspection SimplifiableIfStatement
+        if (id == R.id.action_settings) {
+            return true;
+        }
+
+        return super.onOptionsItemSelected(item);
+    }
+
+
+}
diff --git a/app/src/main/java/com/example/xrecyclerview/MainActivity.java b/app/src/main/java/com/example/xrecyclerview/MainActivity.java
@@ -28,4 +28,10 @@ public void gotoStaggeredGridActivity(View v) {
         startActivity(intent);
     }
 
+    public void gotoEmptyViewActivity(View v) {
+        Intent intent = new Intent();
+        intent.setClass(this, EmptyViewActivity.class);
+        startActivity(intent);
+    }
+
 }
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
@@ -25,4 +25,12 @@
         android:text="StaggeredGridLayoutManager"
         />
 
+    <Button
+        android:onClick="gotoEmptyViewActivity"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="10dip"
+        android:text="emptyViewSupport"
+        />
+
 </LinearLayout>
diff --git a/app/src/main/res/layout/activity_recyclerview.xml b/app/src/main/res/layout/activity_recyclerview.xml
@@ -9,4 +9,13 @@
         android:layout_width="fill_parent"
         android:layout_height="fill_parent" />
 
+    <TextView
+        android:gravity="center"
+        android:id="@+id/text_empty"
+        android:layout_width="100dp"
+        android:layout_height="100dp"
+        android:layout_centerInParent="true"
+        android:background="#dcdcdc"
+        android:text="emptyView"
+        android:visibility="gone"/>
 </RelativeLayout>
diff --git a/xrecyclerview/src/main/java/com/jcodecraeer/xrecyclerview/XRecyclerView.java b/xrecyclerview/src/main/java/com/jcodecraeer/xrecyclerview/XRecyclerView.java
@@ -37,6 +37,8 @@ public class XRecyclerView extends RecyclerView {
     private static final int TYPE_FOOTER =  -3;
     private int previousTotal = 0;
     private int mPageCount = 0;
+    //adapter没有数据的时候显示,类似于listView的emptyView
+    private View mEmptyView;
 
     public XRecyclerView(Context context) {
         this(context, null);
@@ -152,12 +154,22 @@ public void setArrowImageView(int resid) {
         }
     }
 
+    public void setEmptyView(View emptyView) {
+        this.mEmptyView = emptyView;
+        mDataObserver.onChanged();
+    }
+
+    public View getEmptyView() {
+        return mEmptyView;
+    }
+
     @Override
     public void setAdapter(Adapter adapter) {
         mAdapter  = adapter;
         mWrapAdapter = new WrapAdapter(mHeaderViews, mFootViews, adapter);
         super.setAdapter(mWrapAdapter);
         mAdapter.registerAdapterDataObserver(mDataObserver);
+        mDataObserver.onChanged();
     }
 
     @Override
@@ -279,7 +291,26 @@ private boolean isOnTop() {
     private final RecyclerView.AdapterDataObserver mDataObserver = new RecyclerView.AdapterDataObserver() {
         @Override
         public void onChanged() {
-            mWrapAdapter.notifyDataSetChanged();
+            Adapter<?> adapter = getAdapter();
+            if (adapter != null && mEmptyView != null) {
+                int emptyCount = 0;
+                if (pullRefreshEnabled) {
+                    emptyCount++;
+                }
+                if (loadingMoreEnabled) {
+                    emptyCount++;
+                }
+                if (adapter.getItemCount() == emptyCount) {
+                    mEmptyView.setVisibility(View.VISIBLE);
+                    XRecyclerView.this.setVisibility(View.GONE);
+                } else {
+                    mEmptyView.setVisibility(View.GONE);
+                    XRecyclerView.this.setVisibility(View.VISIBLE);
+                }
+            }
+            if (mWrapAdapter != null) {
+                mWrapAdapter.notifyDataSetChanged();
+            }
         }
 
         @Override
@@ -420,7 +451,7 @@ public int getItemViewType(int position) {
             if(isFooter(position)){
                 return TYPE_FOOTER;
             }
-            int adjPosition = position - getHeadersCount();;
+            int adjPosition = position - getHeadersCount();
             int adapterCount;
             if (adapter != null) {
                 adapterCount = adapter.getItemCount();