Add sample code for PreferenceFragment.

Change-Id: I64222124daa117a2ea61dc55f2e26af78d3689c2

samples/ApiDemos/AndroidManifest.xml

@@ -211,14 +211,16 @@
 
         <!-- Fragment Samples -->
 
-        <activity android:name=".app.FragmentAlertDialog" android:label="@string/fragment_alert_dialog">
+        <activity android:name=".app.FragmentAlertDialog"
+                android:label="@string/fragment_alert_dialog">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.SAMPLE_CODE" />
             </intent-filter>
         </activity>
 
-        <activity android:name=".app.FragmentAnim" android:label="@string/fragment_anim">
+        <activity android:name=".app.FragmentAnim"
+                android:label="@string/fragment_anim">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.SAMPLE_CODE" />
@@ -233,14 +235,16 @@
             </intent-filter>
         </activity>
 
-        <activity android:name=".app.FragmentDialog" android:label="@string/fragment_dialog">
+        <activity android:name=".app.FragmentDialog"
+                android:label="@string/fragment_dialog">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.SAMPLE_CODE" />
             </intent-filter>
         </activity>
 
-        <activity android:name=".app.FragmentLayout" android:label="@string/fragment_layout">
+        <activity android:name=".app.FragmentLayout"
+                android:label="@string/fragment_layout">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.SAMPLE_CODE" />
@@ -249,42 +253,56 @@
 
         <activity android:name=".app.FragmentLayout$DialogActivity" />
 
-        <activity android:name=".app.FragmentListCursorLoader" android:label="@string/fragment_list_cursor_loader">
+        <activity android:name=".app.FragmentListCursorLoader"
+                android:label="@string/fragment_list_cursor_loader">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.SAMPLE_CODE" />
             </intent-filter>
         </activity>
 
-        <activity android:name=".app.FragmentListArray" android:label="@string/fragment_list_array">
+        <activity android:name=".app.FragmentListArray"
+                android:label="@string/fragment_list_array">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.SAMPLE_CODE" />
             </intent-filter>
         </activity>
 
-        <activity android:name=".app.FragmentMenu" android:label="@string/fragment_menu">
+        <activity android:name=".app.FragmentMenu"
+                android:label="@string/fragment_menu">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.SAMPLE_CODE" />
             </intent-filter>
         </activity>
 
-        <activity android:name=".app.FragmentRetainInstance" android:label="@string/fragment_retain_instance">
+        <activity android:name=".app.FragmentPreferences"
+                android:label="@string/fragment_preferences">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.SAMPLE_CODE" />
             </intent-filter>
         </activity>
 
-        <activity android:name=".app.FragmentReceiveResult" android:label="@string/fragment_receive_result">
+        <activity android:name=".app.FragmentRetainInstance"
+                android:label="@string/fragment_retain_instance">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.SAMPLE_CODE" />
             </intent-filter>
         </activity>
 
-        <activity android:name=".app.FragmentStack" android:label="@string/fragment_stack">
+        <activity android:name=".app.FragmentReceiveResult"
+                android:label="@string/fragment_receive_result">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.SAMPLE_CODE" />
+            </intent-filter>
+        </activity>
+
+        <activity android:name=".app.FragmentStack"
+                android:label="@string/fragment_stack">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.SAMPLE_CODE" />

samples/ApiDemos/res/layout-land/fragment_preferences.xml

@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2010 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.
+-->
+
+<!-- Top-level content view for the layout fragment sample when displayed
+     in landscape. -->
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:orientation="horizontal"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+    <fragment android:name="com.example.android.apis.app.FragmentPreferences$CategoriesFragment"
+            android:id="@+id/categories"
+            android:layout_width="0px"
+            android:layout_height="match_parent"
+            android:layout_weight=".3" />
+    <FrameLayout android:id="@+id/prefs"
+            android:layout_width="0px"
+            android:layout_height="match_parent"
+            android:layout_weight=".7" />
+</LinearLayout>

samples/ApiDemos/res/layout/fragment_layout.xml

@@ -19,7 +19,7 @@
 
 <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent" android:layout_height="match_parent">
-    <fragment xmlns:android="http://schemas.android.com/apk/res/android"
+    <fragment
             android:name="com.example.android.apis.app.FragmentLayout$TitlesFragment"
             android:id="@+id/titles"
             android:layout_width="match_parent" android:layout_height="match_parent" />

samples/ApiDemos/res/layout/fragment_preferences.xml

@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2010 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.
+-->
+
+<!-- Top-level content view for the preference fragment sample. -->
+
+<!-- BEGIN_INCLUDE(layout) -->
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:orientation="vertical"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+    <fragment android:name="com.example.android.apis.app.FragmentPreferences$CategoriesFragment"
+            android:id="@+id/categories"
+            android:layout_width="match_parent"
+            android:layout_height="0px"
+            android:layout_weight=".3" />
+    <FrameLayout android:id="@+id/prefs"
+            android:layout_width="match_parent"
+            android:layout_height="0px"
+            android:layout_weight=".7" />
+</LinearLayout>
+<!-- END_INCLUDE(layout) -->

samples/ApiDemos/res/values/strings.xml

@@ -107,6 +107,8 @@
     <string name="fragment1menu">Show fragment 1 menu</string>
     <string name="fragment2menu">Show fragment 2 menu</string>
     
+    <string name="fragment_preferences">App/Fragment/Preferences</string>
+
     <string name="fragment_retain_instance">App/Fragment/Retain Instance</string>
     <string name="fragment_retain_instance_msg">Current progress of retained fragment;
     restarts if fragment is re-created.</string>

samples/ApiDemos/src/com/example/android/apis/app/FragmentPreferences.java

@@ -0,0 +1,104 @@
+/*
+ * Copyright (C) 2010 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.apis.app;
+
+import com.example.android.apis.R;
+import com.example.android.apis.Shakespeare;
+
+import android.app.Activity;
+import android.app.Fragment;
+import android.app.ListFragment;
+import android.content.Context;
+import android.content.Intent;
+import android.content.res.TypedArray;
+import android.net.Uri;
+import android.os.Bundle;
+import android.preference.CheckBoxPreference;
+import android.preference.EditTextPreference;
+import android.preference.ListPreference;
+import android.preference.PreferenceCategory;
+import android.preference.PreferenceFragment;
+import android.preference.PreferenceScreen;
+import android.util.Log;
+import android.view.View;
+import android.widget.ArrayAdapter;
+import android.widget.ListView;
+
+/**
+ * Demonstration of PreferenceFragment, splitting the activity into a
+ * list categories and preferences.
+ */
+//BEGIN_INCLUDE(activity)
+public class FragmentPreferences extends Activity {
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        // The content for this activity places CategoriesFragment to one
+        // side, and leaves the rest to dynamically add the prefs fragment.
+        setContentView(R.layout.fragment_preferences);
+    }
+
+    /**
+     * This fragment shows a list of categories the user can pick.  When they
+     * pick one, the corresponding preferences fragment is created and shown.
+     */
+    public static class CategoriesFragment extends ListFragment {
+        @Override
+        public void onActivityCreated(Bundle savedInstanceState) {
+            super.onActivityCreated(savedInstanceState);
+            setListAdapter(new ArrayAdapter<String>(getActivity(),
+                    android.R.layout.simple_list_item_1,
+                    new String[] { "Prefs 1", "Prefs 2" }));
+            switchPreferences(0);
+        }
+
+        @Override
+        public void onListItemClick(ListView l, View v, int position, long id) {
+            switchPreferences(position);
+        }
+
+        /**
+         * Show the given preferences, replacing whatever was last shown.
+         */
+        void switchPreferences(int which) {
+            Fragment f = which == 0 ? new Prefs1Fragment() : new Prefs2Fragment();
+            getActivity().openFragmentTransaction().replace(R.id.prefs, f).commit();
+        }
+    }
+
+    public static class Prefs1Fragment extends PreferenceFragment {
+        @Override
+        public void onCreate(Bundle savedInstanceState) {
+            super.onCreate(savedInstanceState);
+
+            // Load the preferences from an XML resource
+            addPreferencesFromResource(R.xml.preferences);
+        }
+    }
+
+    public static class Prefs2Fragment extends PreferenceFragment {
+        @Override
+        public void onCreate(Bundle savedInstanceState) {
+            super.onCreate(savedInstanceState);
+
+            // Load the preferences from an XML resource
+            addPreferencesFromResource(R.xml.preference_dependencies);
+        }
+    }
+}
+//END_INCLUDE(activity)