Adding AsyncListUtilActivity to Support7Demo
Bug: 20180767
Change-Id: Ib097e3aa0f4fa9179b6bfd743fa43b584e7860ce
diff --git a/samples/Support7Demos/AndroidManifest.xml b/samples/Support7Demos/AndroidManifest.xml
index b903f9a..e3337a6 100644
--- a/samples/Support7Demos/AndroidManifest.xml
+++ b/samples/Support7Demos/AndroidManifest.xml
@@ -375,6 +375,15 @@
</intent-filter>
</activity>
+ <activity android:name=".widget.AsyncListUtilActivity"
+ android:label="@string/async_list_util"
+ android:theme="@style/Theme.AppCompat">
+ <intent-filter>
+ <action android:name="android.intent.action.MAIN" />
+ <category android:name="com.example.android.supportv7.SAMPLE_CODE" />
+ </intent-filter>
+ </activity>
+
<activity android:name=".view.CardViewActivity"
android:label="@string/card_view"
android:theme="@style/Theme.AppCompat">
diff --git a/samples/Support7Demos/res/values/strings.xml b/samples/Support7Demos/res/values/strings.xml
index 5c87db9..98d2087 100644
--- a/samples/Support7Demos/res/values/strings.xml
+++ b/samples/Support7Demos/res/values/strings.xml
@@ -147,6 +147,7 @@
<string name="linear_layout_manager">RecyclerView/Linear Layout Manager</string>
<string name="grid_layout_manager">RecyclerView/Grid Layout Manager</string>
<string name="staggered_grid_layout_manager">RecyclerView/Staggered Grid Layout Manager</string>
+ <string name="async_list_util">RecyclerView/AsyncListUtil</string>
<string name="checkbox_orientation">Horz.</string>
<string name="checkbox_reverse">Rev.</string>
<string name="checkbox_layout_dir">Layout Dir</string>
diff --git a/samples/Support7Demos/src/com/example/android/supportv7/widget/AsyncListUtilActivity.java b/samples/Support7Demos/src/com/example/android/supportv7/widget/AsyncListUtilActivity.java
new file mode 100644
index 0000000..8ec3a23
--- /dev/null
+++ b/samples/Support7Demos/src/com/example/android/supportv7/widget/AsyncListUtilActivity.java
@@ -0,0 +1,166 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package com.example.android.supportv7.widget;
+
+import com.example.android.supportv7.Cheeses;
+
+import android.app.Activity;
+import android.content.Context;
+import android.os.Bundle;
+import android.support.v4.view.MenuItemCompat;
+import android.support.v7.widget.LinearLayoutManager;
+import android.support.v7.widget.RecyclerView;
+import android.support.v7.util.AsyncListUtil;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.ViewGroup;
+import android.widget.TextView;
+
+/**
+ * A sample Activity to demonstrate capabilities of {@link AsyncListUtil}.
+ */
+public class AsyncListUtilActivity extends Activity {
+
+ private static final String TAG = "AsyncListUtilActivity";
+
+ private RecyclerView mRecyclerView;
+
+ private LinearLayoutManager mLinearLayoutManager;
+
+ @Override
+ protected void onCreate(Bundle savedInstanceState) {
+ super.onCreate(savedInstanceState);
+
+ mRecyclerView = new RecyclerView(this);
+ mLinearLayoutManager = new LinearLayoutManager(this);
+ mRecyclerView.setLayoutManager(mLinearLayoutManager);
+ mRecyclerView.setHasFixedSize(true);
+ final ViewGroup.LayoutParams layoutParams = new ViewGroup.LayoutParams(
+ ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
+ mRecyclerView.setLayoutParams(layoutParams);
+ mRecyclerView.setAdapter(new AsyncAdapter());
+ setContentView(mRecyclerView);
+ }
+
+ @Override
+ public boolean onCreateOptionsMenu(Menu menu) {
+ super.onCreateOptionsMenu(menu);
+ MenuItemCompat.setShowAsAction(menu.add("Layout"), MenuItemCompat.SHOW_AS_ACTION_IF_ROOM);
+ return true;
+ }
+
+ @Override
+ public boolean onOptionsItemSelected(MenuItem item) {
+ mRecyclerView.requestLayout();
+ return super.onOptionsItemSelected(item);
+ }
+
+ private static class TextViewHolder extends RecyclerView.ViewHolder {
+ TextView textView;
+ public TextViewHolder(Context context) {
+ super(new TextView(context));
+ textView = (TextView) itemView;
+ }
+ }
+
+ private class AsyncAdapter extends RecyclerView.Adapter<TextViewHolder> {
+
+ private AsyncListUtil<String> mAsyncListUtil;
+
+ AsyncAdapter() {
+ mAsyncListUtil = new AsyncStringListUtil();
+ }
+
+ @Override
+ public TextViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
+ return new TextViewHolder(parent.getContext());
+ }
+
+ @Override
+ public void onBindViewHolder(TextViewHolder holder, int position) {
+ final String itemString = mAsyncListUtil.getItem(position);
+ if (itemString == null) {
+ holder.textView.setText("loading...");
+ } else {
+ holder.textView.setText(itemString);
+ }
+ }
+
+ @Override
+ public int getItemCount() {
+ return mAsyncListUtil.getItemCount();
+ }
+ }
+
+ private class AsyncStringListUtil extends AsyncListUtil<String> {
+
+ private static final int TILE_SIZE = 5;
+
+ private static final long DELAY_MS = 500;
+
+ public AsyncStringListUtil() {
+ super(String.class, TILE_SIZE,
+ new AsyncListUtil.DataCallback<String>() {
+ @Override
+ public int refreshData() {
+ return Cheeses.sCheeseStrings.length;
+ }
+
+ @Override
+ public void fillData(String[] data, int startPosition, int itemCount) {
+ sleep();
+ for (int i = 0; i < itemCount; i++) {
+ data[i] = Cheeses.sCheeseStrings[startPosition + i];
+ }
+ }
+
+ private void sleep() {
+ try {
+ Thread.sleep(DELAY_MS);
+ } catch (InterruptedException e) {
+ e.printStackTrace();
+ }
+ }
+ },
+ new AsyncListUtil.ViewCallback() {
+ @Override
+ public void getItemRangeInto(int[] outRange) {
+ outRange[0] = mLinearLayoutManager.findFirstVisibleItemPosition();
+ outRange[1] = mLinearLayoutManager.findLastVisibleItemPosition();
+ }
+
+ @Override
+ public void onDataRefresh() {
+ mRecyclerView.getAdapter().notifyDataSetChanged();
+ }
+
+ @Override
+ public void onItemLoaded(int position) {
+ mRecyclerView.getAdapter().notifyItemChanged(position);
+ }
+ });
+
+ mRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
+ @Override
+ public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
+ onRangeChanged();
+ }
+ });
+ }
+ }
+}
