Adds a GridViewPager sample wearable app

Change-Id: I014670493bb54bc1a6e3c1ecda716b9ea8d83412

samples/wearable/GridViewPager/Wearable/build.gradle

@@ -0,0 +1,29 @@
+apply plugin: 'android'
+
+android {
+    compileSdkVersion 20
+    buildToolsVersion '20'
+
+    defaultConfig {
+        minSdkVersion 20
+        targetSdkVersion 20
+        versionCode 1
+        versionName "1.0"
+    }
+
+    buildTypes {
+        release {
+            runProguard false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
+        }
+    }
+
+    lintOptions {
+        abortOnError false
+    }
+}
+
+dependencies {
+    compile "com.android.support:support-v13:20.0.+"
+    compile "com.google.android.support:wearable:1.0.+"
+}

samples/wearable/GridViewPager/Wearable/proguard-rules.txt

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+# To enable ProGuard in your project, edit project.properties
+# to define the proguard.config property as described in that file.
+#
+# Add project specific ProGuard rules here.
+# By default, the flags in this file are appended to flags specified
+# in ${sdk.dir}/tools/proguard/proguard-android.txt
+# You can edit the include path and order by changing the ProGuard
+# include property in project.properties.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# Add any project specific keep options here:
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+-dontwarn android.support.wearable.view.DelayedConfirmationView
+-dontwarn android.support.wearable.view.CircledImageView

samples/wearable/GridViewPager/Wearable/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.example.android.wearable.gridviewpager"
+    android:versionCode="1"
+    android:versionName="1.0" >
+
+    <uses-sdk
+        android:minSdkVersion="20"
+        android:targetSdkVersion="20" />
+
+    <application
+        android:allowBackup="true"
+        android:icon="@drawable/ic_launcher"
+        android:label="@string/app_name"
+        android:theme="@android:style/Theme.DeviceDefault.Light" >
+        <activity
+            android:name="com.example.android.wearable.gridviewpager.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/wearable/GridViewPager/Wearable/src/main/java/com/example/android/wearable/gridviewpager/MainActivity.java

@@ -0,0 +1,50 @@
+/*
+ * 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.wearable.gridviewpager;
+
+import android.app.Activity;
+import android.content.res.Resources;
+import android.os.Bundle;
+import android.support.wearable.view.GridViewPager;
+import android.view.View;
+import android.view.View.OnApplyWindowInsetsListener;
+import android.view.WindowInsets;
+
+public class MainActivity extends Activity {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+        final Resources res = getResources();
+        final GridViewPager pager = (GridViewPager) findViewById(R.id.pager);
+        pager.setOnApplyWindowInsetsListener(new OnApplyWindowInsetsListener() {
+            @Override
+            public WindowInsets onApplyWindowInsets(View v, WindowInsets insets) {
+                // Adjust page margins:
+                //   A little extra horizontal spacing between pages looks a bit
+                //   less crowded on a round display.
+                final boolean round = insets.isRound();
+                int rowMargin = res.getDimensionPixelOffset(R.dimen.page_row_margin);
+                int colMargin = res.getDimensionPixelOffset(round ?
+                        R.dimen.page_column_margin_round : R.dimen.page_column_margin);
+                pager.setPageMargins(rowMargin, colMargin);
+                return insets;
+            }
+        });
+        pager.setAdapter(new SampleGridPagerAdapter(this, getFragmentManager()));
+    }
+}

samples/wearable/GridViewPager/Wearable/src/main/java/com/example/android/wearable/gridviewpager/SampleGridPagerAdapter.java

@@ -0,0 +1,133 @@
+/*
+ * 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.wearable.gridviewpager;
+
+import android.app.Fragment;
+import android.app.FragmentManager;
+import android.content.Context;
+import android.support.wearable.view.CardFragment;
+import android.support.wearable.view.FragmentGridPagerAdapter;
+import android.support.wearable.view.ImageReference;
+import android.view.Gravity;
+
+/**
+ * Constructs fragments as requested by the GridViewPager. For each row a
+ * different background is provided.
+ */
+public class SampleGridPagerAdapter extends FragmentGridPagerAdapter {
+
+    private final Context mContext;
+
+    public SampleGridPagerAdapter(Context ctx, FragmentManager fm) {
+        super(fm);
+        mContext = ctx;
+    }
+
+    static final int[] BG_IMAGES = new int[] {
+            R.drawable.debug_background_1,
+            R.drawable.debug_background_2,
+            R.drawable.debug_background_3,
+            R.drawable.debug_background_4,
+            R.drawable.debug_background_5
+    };
+
+    /** A simple container for static data in each page */
+    private static class Page {
+        int titleRes;
+        int textRes;
+        int iconRes;
+        int cardGravity = Gravity.BOTTOM;
+        boolean expansionEnabled = true;
+        float expansionFactor = 1.0f;
+        int expansionDirection = CardFragment.EXPAND_DOWN;
+
+        public Page(int titleRes, int textRes, boolean expansion) {
+            this(titleRes, textRes, 0);
+            this.expansionEnabled = expansion;
+        }
+
+        public Page(int titleRes, int textRes, boolean expansion, float expansionFactor) {
+            this(titleRes, textRes, 0);
+            this.expansionEnabled = expansion;
+            this.expansionFactor = expansionFactor;
+        }
+
+        public Page(int titleRes, int textRes, int iconRes) {
+            this.titleRes = titleRes;
+            this.textRes = textRes;
+            this.iconRes = iconRes;
+        }
+
+        public Page(int titleRes, int textRes, int iconRes, int gravity) {
+            this.titleRes = titleRes;
+            this.textRes = textRes;
+            this.iconRes = iconRes;
+            this.cardGravity = gravity;
+        }
+    }
+
+    private final Page[][] PAGES = {
+            {
+                    new Page(R.string.welcome_title, R.string.welcome_text, R.drawable.bugdroid,
+                            Gravity.CENTER_VERTICAL),
+            },
+            {
+                    new Page(R.string.about_title, R.string.about_text, false),
+            },
+            {
+                    new Page(R.string.cards_title, R.string.cards_text, true, 2),
+                    new Page(R.string.expansion_title, R.string.expansion_text, true, 10),
+            },
+            {
+                    new Page(R.string.backgrounds_title, R.string.backgrounds_text, true, 2),
+                    new Page(R.string.columns_title, R.string.columns_text, true, 2)
+            },
+            {
+                    new Page(R.string.dismiss_title, R.string.dismiss_text, R.drawable.bugdroid,
+                            Gravity.CENTER_VERTICAL),
+            },
+
+    };
+
+    @Override
+    public Fragment getFragment(int row, int col) {
+        Page page = PAGES[row][col];
+        String title = page.titleRes != 0 ? mContext.getString(page.titleRes) : null;
+        String text = page.textRes != 0 ? mContext.getString(page.textRes) : null;
+        CardFragment fragment = CardFragment.create(title, text, page.iconRes);
+        // Advanced settings
+        fragment.setCardGravity(page.cardGravity);
+        fragment.setExpansionEnabled(page.expansionEnabled);
+        fragment.setExpansionDirection(page.expansionDirection);
+        fragment.setExpansionFactor(page.expansionFactor);
+        return fragment;
+    }
+
+    @Override
+    public ImageReference getBackground(int row, int column) {
+        return ImageReference.forDrawable(BG_IMAGES[row % BG_IMAGES.length]);
+    }
+
+    @Override
+    public int getRowCount() {
+        return PAGES.length;
+    }
+
+    @Override
+    public int getColumnCount(int rowNum) {
+        return PAGES[rowNum].length;
+    }
+}

samples/wearable/GridViewPager/Wearable/src/main/res/layout/activity_main.xml

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+<android.support.wearable.view.GridViewPager
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/pager"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:keepScreenOn="true" />

samples/wearable/GridViewPager/Wearable/src/main/res/values/dimens.xml

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+<resources>
+    <dimen name="page_row_margin">100dp</dimen>
+    <dimen name="page_column_margin">10dp</dimen>
+    <dimen name="page_column_margin_round">50dp</dimen>
+</resources>

samples/wearable/GridViewPager/Wearable/src/main/res/values/strings.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+
+    <string name="app_name">GridViewPager Sample</string>
+    <string name="welcome_title">GridViewPager</string>
+    <string name="welcome_text">Welcome!</string>
+
+    <string name="about_title">About</string>
+    <string name="about_text">Content is organized into multiple pages. Swipe
+        between cards to view other content.</string>
+
+    <string name="cards_title">Cards</string>
+    <string name="cards_text">Each page is created using a CardFragment. A
+        layout is placed inside the card and the rest is handled
+        automatically.</string>
+
+    <string name="expansion_title">Expansion</string>
+    <string name="expansion_text">By default, each card will grow taller to
+        accommodate extra content. Tall cards can be scrolled through
+        like any scrollable view. The maximum height is controlled by
+        setExpansionFactor() with a default of 10 pages. After that
+        you\'ll notice a faded edge to indicate there is more. Expansion
+        can be disabled completely using setExpansionEnabled(false).
+        With this, the content will be clipped if it\'s taller than one
+        page.</string>
+
+    <string name="backgrounds_title">Backgrounds</string>
+    <string name="backgrounds_text">Backgrounds are supplied by the adapter\'s
+        getBackground method. Parallax and crossfade effects are applied
+        automatically.</string>
+
+    <string name="columns_title">Columns</string>
+    <string name="columns_text">When moving between rows, the pager always
+        returns to column 0. This is adjustable in the adapter. See
+        method getCurrentColumnForRow().</string>
+
+    <string name="dismiss_title">Dismiss</string>
+    <string name="dismiss_text">To exit the application, swipe from left to
+        right.</string>
+
+</resources>