Update browseable samples for lmp-docs

Synced to commit df5e5013422b81b4fd05c0ac9fd964b13624847a. Includes
new samples for Android Auto.

Change-Id: I3fec46e2a6b3f196682a92f1afd91eb682dc2dc1

samples/browseable/PdfRendererBasic/AndroidManifest.xml

@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ Copyright 2014 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.
+-->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.example.android.pdfrendererbasic"
+    android:versionCode="1"
+    android:versionName="1.0">
+
+    <application android:allowBackup="true"
+        android:label="@string/app_name"
+        android:icon="@drawable/ic_launcher"
+        android:theme="@style/AppTheme">
+
+        <activity android:name=".MainActivity"
+                  android:label="@string/app_name">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+
+</manifest>

samples/browseable/PdfRendererBasic/_index.jd

@@ -0,0 +1,9 @@
+page.tags="PdfRendererBasic"
+sample.group=UI
+@jd:body
+
+<p>
+            
+            This sample demonstrates how to use PdfRenderer to display PDF documents on the screen.
+            
+        </p>

samples/browseable/PdfRendererBasic/res/layout/activity_main.xml

@@ -0,0 +1,36 @@
+<!--
+  Copyright 2013 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.
+  -->
+
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical">
+
+    <LinearLayout style="@style/Widget.SampleMessageTile"
+                  android:layout_width="match_parent"
+                  android:layout_height="wrap_content"
+                  android:orientation="vertical">
+
+        <TextView style="@style/Widget.SampleMessage"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginLeft="@dimen/horizontal_page_margin"
+            android:layout_marginRight="@dimen/horizontal_page_margin"
+            android:layout_marginTop="@dimen/vertical_page_margin"
+            android:layout_marginBottom="@dimen/vertical_page_margin"
+            android:text="@string/intro_message" />
+    </LinearLayout>
+</LinearLayout>

samples/browseable/PdfRendererBasic/res/layout/activity_main_real.xml

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  Copyright (C) 2014 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.
+-->
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/container"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".MainActivity"
+    tools:ignore="MergeRootFrame" />

samples/browseable/PdfRendererBasic/res/layout/fragment_pdf_renderer_basic.xml

@@ -0,0 +1,56 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  Copyright (C) 2014 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.
+-->
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    tools:context=".MainActivity$PlaceholderFragment">
+
+    <ImageView
+        android:id="@+id/image"
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_weight="1"
+        android:background="@android:color/white"
+        android:scaleType="fitCenter" />
+
+    <LinearLayout
+        style="?android:attr/buttonBarStyle"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:measureWithLargestChild="true"
+        android:orientation="horizontal">
+
+        <Button
+            android:id="@+id/previous"
+            style="?android:attr/buttonBarButtonStyle"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:text="@string/previous" />
+
+        <Button
+            android:id="@+id/next"
+            style="?android:attr/buttonBarButtonStyle"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:text="@string/next" />
+    </LinearLayout>
+
+</LinearLayout>

samples/browseable/PdfRendererBasic/res/menu/main.xml

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  Copyright (C) 2014 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.
+-->
+<menu xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <item
+        android:id="@+id/action_info"
+        android:icon="@drawable/ic_action_info"
+        android:showAsAction="always"
+        android:title="@string/info" />
+
+</menu>

samples/browseable/PdfRendererBasic/res/values-sw600dp/template-dimens.xml

@@ -0,0 +1,24 @@
+<!--
+  Copyright 2013 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.
+  -->
+
+<resources>
+
+    <!-- Semantic definitions -->
+
+    <dimen name="horizontal_page_margin">@dimen/margin_huge</dimen>
+    <dimen name="vertical_page_margin">@dimen/margin_medium</dimen>
+
+</resources>

samples/browseable/PdfRendererBasic/res/values-sw600dp/template-styles.xml

@@ -0,0 +1,25 @@
+<!--
+  Copyright 2013 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.
+  -->
+
+<resources>
+
+    <style name="Widget.SampleMessage">
+        <item name="android:textAppearance">?android:textAppearanceLarge</item>
+        <item name="android:lineSpacingMultiplier">1.2</item>
+        <item name="android:shadowDy">-6.5</item>
+    </style>
+
+</resources>

samples/browseable/PdfRendererBasic/res/values-v11/template-styles.xml

@@ -0,0 +1,22 @@
+<!--
+  Copyright 2013 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.
+  -->
+
+<resources>
+
+    <!-- Activity themes -->
+    <style name="Theme.Base" parent="android:Theme.Holo.Light" />
+
+</resources>

samples/browseable/PdfRendererBasic/res/values-v21/template-styles.xml

@@ -0,0 +1,22 @@
+<!--
+  Copyright 2014 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.
+  -->
+
+<resources>
+
+    <!-- Activity themes -->
+    <style name="Theme.Base" parent="android:Theme.Material.Light" />
+
+</resources>

samples/browseable/PdfRendererBasic/res/values/base-strings.xml

@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ Copyright 2013 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.
+-->
+<resources>
+    <string name="app_name">PdfRendererBasic</string>
+    <string name="intro_message">
+        <![CDATA[
+        
+            
+            This sample demonstrates how to use PdfRenderer to display PDF documents on the screen.
+            
+        
+        ]]>
+    </string>
+</resources>

samples/browseable/PdfRendererBasic/res/values/strings.xml

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  Copyright (C) 2014 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.
+-->
+<resources>
+
+    <string name="app_name_with_index">PdfRendererBasic (%1$d/%2$d)</string>
+    <string name="info">Info</string>
+    <string name="previous">Previous</string>
+    <string name="next">Next</string>
+
+</resources>

samples/browseable/PdfRendererBasic/res/values/template-dimens.xml

@@ -0,0 +1,32 @@
+<!--
+  Copyright 2013 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.
+  -->
+
+<resources>
+
+    <!-- Define standard dimensions to comply with Holo-style grids and rhythm. -->
+
+    <dimen name="margin_tiny">4dp</dimen>
+    <dimen name="margin_small">8dp</dimen>
+    <dimen name="margin_medium">16dp</dimen>
+    <dimen name="margin_large">32dp</dimen>
+    <dimen name="margin_huge">64dp</dimen>
+
+    <!-- Semantic definitions -->
+
+    <dimen name="horizontal_page_margin">@dimen/margin_medium</dimen>
+    <dimen name="vertical_page_margin">@dimen/margin_medium</dimen>
+
+</resources>

samples/browseable/PdfRendererBasic/res/values/template-styles.xml

@@ -0,0 +1,42 @@
+<!--
+  Copyright 2013 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.
+  -->
+
+<resources>
+
+    <!-- Activity themes -->
+
+    <style name="Theme.Base" parent="android:Theme.Light" />
+
+    <style name="Theme.Sample" parent="Theme.Base" />
+
+    <style name="AppTheme" parent="Theme.Sample" />
+    <!-- Widget styling -->
+
+    <style name="Widget" />
+
+    <style name="Widget.SampleMessage">
+        <item name="android:textAppearance">?android:textAppearanceMedium</item>
+        <item name="android:lineSpacingMultiplier">1.1</item>
+    </style>
+
+    <style name="Widget.SampleMessageTile">
+        <item name="android:background">@drawable/tile</item>
+        <item name="android:shadowColor">#7F000000</item>
+        <item name="android:shadowDy">-3.5</item>
+        <item name="android:shadowRadius">2</item>
+    </style>
+
+</resources>

samples/browseable/PdfRendererBasic/src/com.example.android.pdfrendererbasic/MainActivity.java

@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) 2014 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.pdfrendererbasic;
+
+import android.app.Activity;
+import android.app.AlertDialog;
+import android.os.Bundle;
+import android.view.Menu;
+import android.view.MenuItem;
+
+public class MainActivity extends Activity {
+
+    public static final String FRAGMENT_PDF_RENDERER_BASIC = "pdf_renderer_basic";
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main_real);
+        if (savedInstanceState == null) {
+            getFragmentManager().beginTransaction()
+                    .add(R.id.container, new PdfRendererBasicFragment(),
+                            FRAGMENT_PDF_RENDERER_BASIC)
+                    .commit();
+        }
+    }
+
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        getMenuInflater().inflate(R.menu.main, menu);
+        return true;
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+            case R.id.action_info:
+                new AlertDialog.Builder(this)
+                        .setMessage(R.string.intro_message)
+                        .setPositiveButton(android.R.string.ok, null)
+                        .show();
+                return true;
+        }
+        return super.onOptionsItemSelected(item);
+    }
+}

samples/browseable/PdfRendererBasic/src/com.example.android.pdfrendererbasic/PdfRendererBasicFragment.java

@@ -0,0 +1,221 @@
+/*
+ * Copyright (C) 2014 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.pdfrendererbasic;
+
+import android.app.Activity;
+import android.app.Fragment;
+import android.content.Context;
+import android.graphics.Bitmap;
+import android.graphics.pdf.PdfRenderer;
+import android.os.Bundle;
+import android.os.ParcelFileDescriptor;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.Button;
+import android.widget.ImageView;
+import android.widget.Toast;
+
+import java.io.IOException;
+
+/**
+ * This fragment has a big {@ImageView} that shows PDF pages, and 2 {@link android.widget.Button}s to move between
+ * pages. We use a {@link android.graphics.pdf.PdfRenderer} to render PDF pages as {@link android.graphics.Bitmap}s.
+ */
+public class PdfRendererBasicFragment extends Fragment implements View.OnClickListener {
+
+    /**
+     * Key string for saving the state of current page index.
+     */
+    private static final String STATE_CURRENT_PAGE_INDEX = "current_page_index";
+
+    /**
+     * File descriptor of the PDF.
+     */
+    private ParcelFileDescriptor mFileDescriptor;
+
+    /**
+     * {@link android.graphics.pdf.PdfRenderer} to render the PDF.
+     */
+    private PdfRenderer mPdfRenderer;
+
+    /**
+     * Page that is currently shown on the screen.
+     */
+    private PdfRenderer.Page mCurrentPage;
+
+    /**
+     * {@link android.widget.ImageView} that shows a PDF page as a {@link android.graphics.Bitmap}
+     */
+    private ImageView mImageView;
+
+    /**
+     * {@link android.widget.Button} to move to the previous page.
+     */
+    private Button mButtonPrevious;
+
+    /**
+     * {@link android.widget.Button} to move to the next page.
+     */
+    private Button mButtonNext;
+
+    public PdfRendererBasicFragment() {
+    }
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container,
+                             Bundle savedInstanceState) {
+        return inflater.inflate(R.layout.fragment_pdf_renderer_basic, container, false);
+    }
+
+    @Override
+    public void onViewCreated(View view, Bundle savedInstanceState) {
+        super.onViewCreated(view, savedInstanceState);
+        // Retain view references.
+        mImageView = (ImageView) view.findViewById(R.id.image);
+        mButtonPrevious = (Button) view.findViewById(R.id.previous);
+        mButtonNext = (Button) view.findViewById(R.id.next);
+        // Bind events.
+        mButtonPrevious.setOnClickListener(this);
+        mButtonNext.setOnClickListener(this);
+        // Show the first page by default.
+        int index = 0;
+        // If there is a savedInstanceState (screen orientations, etc.), we restore the page index.
+        if (null != savedInstanceState) {
+            index = savedInstanceState.getInt(STATE_CURRENT_PAGE_INDEX, 0);
+        }
+        showPage(index);
+    }
+
+    @Override
+    public void onAttach(Activity activity) {
+        super.onAttach(activity);
+        try {
+            openRenderer(activity);
+        } catch (IOException e) {
+            e.printStackTrace();
+            Toast.makeText(activity, "Error! " + e.getMessage(), Toast.LENGTH_SHORT).show();
+            activity.finish();
+        }
+    }
+
+    @Override
+    public void onDetach() {
+        try {
+            closeRenderer();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        super.onDetach();
+    }
+
+    @Override
+    public void onSaveInstanceState(Bundle outState) {
+        super.onSaveInstanceState(outState);
+        if (null != mCurrentPage) {
+            outState.putInt(STATE_CURRENT_PAGE_INDEX, mCurrentPage.getIndex());
+        }
+    }
+
+    /**
+     * Sets up a {@link android.graphics.pdf.PdfRenderer} and related resources.
+     */
+    private void openRenderer(Context context) throws IOException {
+        // In this sample, we read a PDF from the assets directory.
+        mFileDescriptor = context.getAssets().openFd("sample.pdf").getParcelFileDescriptor();
+        // This is the PdfRenderer we use to render the PDF.
+        mPdfRenderer = new PdfRenderer(mFileDescriptor);
+    }
+
+    /**
+     * Closes the {@link android.graphics.pdf.PdfRenderer} and related resources.
+     *
+     * @throws java.io.IOException When the PDF file cannot be closed.
+     */
+    private void closeRenderer() throws IOException {
+        if (null != mCurrentPage) {
+            mCurrentPage.close();
+        }
+        mPdfRenderer.close();
+        mFileDescriptor.close();
+    }
+
+    /**
+     * Shows the specified page of PDF to the screen.
+     *
+     * @param index The page index.
+     */
+    private void showPage(int index) {
+        if (mPdfRenderer.getPageCount() <= index) {
+            return;
+        }
+        // Make sure to close the current page before opening another one.
+        if (null != mCurrentPage) {
+            mCurrentPage.close();
+        }
+        // Use `openPage` to open a specific page in PDF.
+        mCurrentPage = mPdfRenderer.openPage(index);
+        // Important: the destination bitmap must be ARGB (not RGB).
+        Bitmap bitmap = Bitmap.createBitmap(mCurrentPage.getWidth(), mCurrentPage.getHeight(),
+                Bitmap.Config.ARGB_8888);
+        // Here, we render the page onto the Bitmap.
+        // To render a portion of the page, use the second and third parameter. Pass nulls to get
+        // the default result.
+        // Pass either RENDER_MODE_FOR_DISPLAY or RENDER_MODE_FOR_PRINT for the last parameter.
+        mCurrentPage.render(bitmap, null, null, PdfRenderer.Page.RENDER_MODE_FOR_DISPLAY);
+        // We are ready to show the Bitmap to user.
+        mImageView.setImageBitmap(bitmap);
+        updateUi();
+    }
+
+    /**
+     * Updates the state of 2 control buttons in response to the current page index.
+     */
+    private void updateUi() {
+        int index = mCurrentPage.getIndex();
+        int pageCount = mPdfRenderer.getPageCount();
+        mButtonPrevious.setEnabled(0 != index);
+        mButtonNext.setEnabled(index + 1 < pageCount);
+        getActivity().setTitle(getString(R.string.app_name_with_index, index + 1, pageCount));
+    }
+
+    /**
+     * Gets the number of pages in the PDF. This method is marked as public for testing.
+     *
+     * @return The number of pages.
+     */
+    public int getPageCount() {
+        return mPdfRenderer.getPageCount();
+    }
+
+    @Override
+    public void onClick(View view) {
+        switch (view.getId()) {
+            case R.id.previous: {
+                // Move to the previous page
+                showPage(mCurrentPage.getIndex() - 1);
+                break;
+            }
+            case R.id.next: {
+                // Move to the next page
+                showPage(mCurrentPage.getIndex() + 1);
+                break;
+            }
+        }
+    }
+
+}