Add plugin controls to tuner

Allow plugins to be manually turned off from within the tuner. This
screen only shows itself if at some point in time a plugin has been
active on this device.  Plugins can also serface settings there by
receiving the com.android.systemui.action.PLUGIN_SETTINGS action.

Test: Manual
Change-Id: Ifb043c85e383fc072c6445ae322293a6401a6f2c

12 files changed, 326 insertions, 9 deletions

diff --git a/packages/SystemUI/plugin/ExamplePlugin/AndroidManifest.xml b/packages/SystemUI/plugin/ExamplePlugin/AndroidManifest.xml
index bd2c71c38f5a..ff89bbcb455f 100644
--- a/packages/SystemUI/plugin/ExamplePlugin/AndroidManifest.xml
+++ b/packages/SystemUI/plugin/ExamplePlugin/AndroidManifest.xml
@@ -21,7 +21,15 @@
     <uses-permission android:name="com.android.systemui.permission.PLUGIN" />
 
     <application>
-        <service android:name=".SampleOverlayPlugin">
+        <activity android:name=".PluginSettings"
+            android:label="@string/plugin_label">
+            <intent-filter>
+                <action android:name="com.android.systemui.action.PLUGIN_SETTINGS" />
+            </intent-filter>
+        </activity>
+
+        <service android:name=".SampleOverlayPlugin"
+            android:label="@string/plugin_label">
             <intent-filter>
                 <action android:name="com.android.systemui.action.PLUGIN_OVERLAY" />
             </intent-filter>
diff --git a/packages/SystemUI/plugin/ExamplePlugin/res/layout/plugin_settings.xml b/packages/SystemUI/plugin/ExamplePlugin/res/layout/plugin_settings.xml
new file mode 100644
index 000000000000..eb90283f08d0
--- /dev/null
+++ b/packages/SystemUI/plugin/ExamplePlugin/res/layout/plugin_settings.xml
@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+** Copyright 2016, 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.
+-->
+
+<TextView
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:textAppearance="?android:attr/textAppearanceLarge"
+    android:text="@string/plugin_settings_here"
+    android:gravity="center" />
diff --git a/packages/SystemUI/plugin/ExamplePlugin/res/values/strings.xml b/packages/SystemUI/plugin/ExamplePlugin/res/values/strings.xml
new file mode 100644
index 000000000000..a0bfe849e5c6
--- /dev/null
+++ b/packages/SystemUI/plugin/ExamplePlugin/res/values/strings.xml
@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+/**
+ * Copyright (c) 2016, 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 xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+
+    <string name="plugin_settings_here" translatable="false">Plugin settings go here</string>
+    <string name="plugin_label" translatable="false">Overlay Plugin</string>
+
+</resources>
diff --git a/packages/SystemUI/plugin/ExamplePlugin/src/com/android/systemui/plugin/testoverlayplugin/PluginSettings.java b/packages/SystemUI/plugin/ExamplePlugin/src/com/android/systemui/plugin/testoverlayplugin/PluginSettings.java
new file mode 100644
index 000000000000..cf39075d958f
--- /dev/null
+++ b/packages/SystemUI/plugin/ExamplePlugin/src/com/android/systemui/plugin/testoverlayplugin/PluginSettings.java
@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2016 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.android.systemui.plugin.testoverlayplugin;
+
+import android.annotation.Nullable;
+import android.app.Activity;
+import android.os.Bundle;
+
+/**
+ * DO NOT Reference Plugin interfaces here, this runs in the plugin APK's process
+ * and is only for modifying settings.
+ */
+public class PluginSettings extends Activity {
+
+    @Override
+    public void onCreate(@Nullable Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.plugin_settings);
+    }
+}
diff --git a/packages/SystemUI/plugin/src/com/android/systemui/plugins/PluginInstanceManager.java b/packages/SystemUI/plugin/src/com/android/systemui/plugins/PluginInstanceManager.java
index 2a7139c3a74c..495771a3c8ec 100644
--- a/packages/SystemUI/plugin/src/com/android/systemui/plugins/PluginInstanceManager.java
+++ b/packages/SystemUI/plugin/src/com/android/systemui/plugins/PluginInstanceManager.java
@@ -24,7 +24,6 @@ import android.content.pm.ApplicationInfo;
 import android.content.pm.PackageManager;
 import android.content.pm.ResolveInfo;
 import android.net.Uri;
-import android.os.AsyncTask;
 import android.os.Build;
 import android.os.Handler;
 import android.os.Looper;
@@ -163,6 +162,7 @@ public class PluginInstanceManager<T extends Plugin> extends BroadcastReceiver {
             switch (msg.what) {
                 case PLUGIN_CONNECTED:
                     if (DEBUG) Log.d(TAG, "onPluginConnected");
+                    PluginPrefs.setHasPlugins(mContext);
                     PluginInfo<T> info = (PluginInfo<T>) msg.obj;
                     info.mPlugin.onCreate(mContext, info.mPluginContext);
                     mListener.onPluginConnected(info.mPlugin);
diff --git a/packages/SystemUI/plugin/src/com/android/systemui/plugins/PluginManager.java b/packages/SystemUI/plugin/src/com/android/systemui/plugins/PluginManager.java
index aa0b3c586747..4bf6494995bc 100644
--- a/packages/SystemUI/plugin/src/com/android/systemui/plugins/PluginManager.java
+++ b/packages/SystemUI/plugin/src/com/android/systemui/plugins/PluginManager.java
@@ -37,6 +37,7 @@ public class PluginManager {
     private final Context mContext;
     private final PluginInstanceManagerFactory mFactory;
     private final boolean isDebuggable;
+    private final PluginPrefs mPluginPrefs;
 
     private PluginManager(Context context) {
         this(context, new PluginInstanceManagerFactory(), Build.IS_DEBUGGABLE,
@@ -51,6 +52,7 @@ public class PluginManager {
         mBackgroundThread = new HandlerThread("Plugins");
         mBackgroundThread.start();
         isDebuggable = debuggable;
+        mPluginPrefs = new PluginPrefs(mContext);
 
         PluginExceptionHandler uncaughtExceptionHandler = new PluginExceptionHandler(
                 defaultHandler);
@@ -68,6 +70,7 @@ public class PluginManager {
             // Never ever ever allow these on production builds, they are only for prototyping.
             return;
         }
+        mPluginPrefs.addAction(action);
         PluginInstanceManager p = mFactory.createPluginInstanceManager(mContext, action, listener,
                 allowMultiple, mBackgroundThread.getLooper(), version);
         p.startListening();
diff --git a/packages/SystemUI/plugin/src/com/android/systemui/plugins/PluginPrefs.java b/packages/SystemUI/plugin/src/com/android/systemui/plugins/PluginPrefs.java
new file mode 100644
index 000000000000..3671b3c1689f
--- /dev/null
+++ b/packages/SystemUI/plugin/src/com/android/systemui/plugins/PluginPrefs.java
@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2016 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.android.systemui.plugins;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.util.ArraySet;
+
+import java.util.Set;
+
+/**
+ * Storage for all plugin actions in SharedPreferences.
+ *
+ * This allows the list of actions that the Tuner needs to search for to be generated
+ * instead of hard coded.
+ */
+public class PluginPrefs {
+
+    private static final String PREFS = "plugin_prefs";
+
+    private static final String PLUGIN_ACTIONS = "actions";
+    private static final String HAS_PLUGINS = "plugins";
+
+    private final Set<String> mPluginActions;
+    private final SharedPreferences mSharedPrefs;
+
+    public PluginPrefs(Context context) {
+        mSharedPrefs = context.getSharedPreferences(PREFS, 0);
+        mPluginActions = new ArraySet<>(mSharedPrefs.getStringSet(PLUGIN_ACTIONS, null));
+    }
+
+    public Set<String> getPluginList() {
+        return mPluginActions;
+    }
+
+    public synchronized void addAction(String action) {
+        if (mPluginActions.add(action)){
+            mSharedPrefs.edit().putStringSet(PLUGIN_ACTIONS, mPluginActions).commit();
+        }
+    }
+
+    public static boolean hasPlugins(Context context) {
+        return context.getSharedPreferences(PREFS, 0).getBoolean(HAS_PLUGINS, false);
+    }
+
+    public static void setHasPlugins(Context context) {
+        context.getSharedPreferences(PREFS, 0).edit().putBoolean(HAS_PLUGINS, true).commit();
+    }
+}
diff --git a/packages/SystemUI/res/layout/tuner_widget_settings_switch.xml b/packages/SystemUI/res/layout/tuner_widget_settings_switch.xml
new file mode 100644
index 000000000000..c89c02fd9171
--- /dev/null
+++ b/packages/SystemUI/res/layout/tuner_widget_settings_switch.xml
@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2016 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="wrap_content"
+    android:layout_height="wrap_content"
+    android:orientation="horizontal"
+    android:gravity="center_vertical">
+
+    <ImageView
+        android:id="@+id/settings"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:src="@drawable/ic_settings"
+        android:tint="@android:color/black"
+        android:padding="12dp"
+        android:background="?android:attr/selectableItemBackgroundBorderless" />
+
+    <View
+        android:id="@+id/divider"
+        android:layout_width="1dp"
+        android:layout_height="30dp"
+        android:layout_marginEnd="8dp"
+        android:background="?android:attr/listDivider" />
+
+    <Switch
+        android:id="@android:id/switch_widget"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:focusable="false"
+        android:clickable="false"
+        android:background="@null" />
+</LinearLayout>
diff --git a/packages/SystemUI/res/values/strings.xml b/packages/SystemUI/res/values/strings.xml
index 562fb7f62b83..3f485c3bad8b 100644
--- a/packages/SystemUI/res/values/strings.xml
+++ b/packages/SystemUI/res/values/strings.xml
@@ -1667,4 +1667,8 @@
     <!-- accessibility label for paging indicator in quick settings [CHAR LIMITi=NONE] -->
     <string name="accessibility_quick_settings_page">Page <xliff:g name="current_page" example="1">%1$d</xliff:g> of <xliff:g name="num_pages" example="2">%2$d</xliff:g></string>
 
+    <!-- Plugin control section of the tuner. Non-translatable since it should
+         not appear on production builds ever. -->
+    <string name="plugins" translatable="false">Plugins</string>
+
 </resources>
diff --git a/packages/SystemUI/res/xml/tuner_prefs.xml b/packages/SystemUI/res/xml/tuner_prefs.xml
index b46e862471f3..211f8e8183e8 100644
--- a/packages/SystemUI/res/xml/tuner_prefs.xml
+++ b/packages/SystemUI/res/xml/tuner_prefs.xml
@@ -133,6 +133,11 @@
             android:title="@string/other"
             android:fragment="com.android.systemui.tuner.OtherPrefs" />
 
+    <Preference
+            android:key="plugins"
+            android:title="@string/plugins"
+            android:fragment="com.android.systemui.tuner.PluginFragment" />
+
     <!-- Warning, this goes last. -->
     <Preference
         android:summary="@string/tuner_persistent_warning"
diff --git a/packages/SystemUI/src/com/android/systemui/tuner/PluginFragment.java b/packages/SystemUI/src/com/android/systemui/tuner/PluginFragment.java
new file mode 100644
index 000000000000..132a6dd6c747
--- /dev/null
+++ b/packages/SystemUI/src/com/android/systemui/tuner/PluginFragment.java
@@ -0,0 +1,111 @@
+/*
+ * Copyright (C) 2016 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.android.systemui.tuner;
+
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
+import android.os.Bundle;
+import android.support.v14.preference.PreferenceFragment;
+import android.support.v14.preference.SwitchPreference;
+import android.support.v7.preference.PreferenceCategory;
+import android.support.v7.preference.PreferenceScreen;
+import android.support.v7.preference.PreferenceViewHolder;
+import android.view.View;
+
+import com.android.systemui.plugins.PluginPrefs;
+import com.android.systemui.R;
+
+import java.util.List;
+import java.util.Set;
+
+public class PluginFragment extends PreferenceFragment {
+
+    public static final String ACTION_PLUGIN_SETTINGS
+            = "com.android.systemui.action.PLUGIN_SETTINGS";
+
+    private PluginPrefs mPluginPrefs;
+
+    @Override
+    public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
+        PreferenceScreen screen = getPreferenceManager().createPreferenceScreen(getContext());
+        screen.setOrderingAsAdded(false);
+        Context prefContext = getPreferenceManager().getContext();
+        mPluginPrefs = new PluginPrefs(getContext());
+        Set<String> pluginActions = mPluginPrefs.getPluginList();
+        for (String action : pluginActions) {
+            String name = action.replace("com.android.systemui.action.PLUGIN_", "");
+            PreferenceCategory category = new PreferenceCategory(prefContext);
+            category.setTitle(name);
+
+            List<ResolveInfo> result = getContext().getPackageManager().queryIntentServices(
+                    new Intent(action), PackageManager.MATCH_DISABLED_COMPONENTS);
+            if (result.size() > 0) {
+                screen.addPreference(category);
+            }
+            for (ResolveInfo info : result) {
+                category.addPreference(new PluginPreference(prefContext, info));
+            }
+        }
+        setPreferenceScreen(screen);
+    }
+
+    private static class PluginPreference extends SwitchPreference {
+        private final ComponentName mComponent;
+        private final boolean mHasSettings;
+
+        public PluginPreference(Context prefContext, ResolveInfo info) {
+            super(prefContext);
+            mComponent = new ComponentName(info.serviceInfo.packageName, info.serviceInfo.name);
+            PackageManager pm = prefContext.getPackageManager();
+            mHasSettings = pm.resolveActivity(new Intent(ACTION_PLUGIN_SETTINGS)
+                    .setPackage(mComponent.getPackageName()), 0) != null;
+            setTitle(info.serviceInfo.loadLabel(pm));
+            setChecked(pm.getComponentEnabledSetting(mComponent)
+                    != PackageManager.COMPONENT_ENABLED_STATE_DISABLED);
+            setWidgetLayoutResource(R.layout.tuner_widget_settings_switch);
+        }
+
+        @Override
+        protected boolean persistBoolean(boolean value) {
+            getContext().getPackageManager().setComponentEnabledSetting(mComponent,
+                    value ? PackageManager.COMPONENT_ENABLED_STATE_ENABLED
+                            : PackageManager.COMPONENT_ENABLED_STATE_DISABLED,
+                    PackageManager.DONT_KILL_APP);
+            return true;
+        }
+
+        @Override
+        public void onBindViewHolder(PreferenceViewHolder holder) {
+            super.onBindViewHolder(holder);
+            holder.findViewById(R.id.settings).setVisibility(mHasSettings ? View.VISIBLE
+                    : View.GONE);
+            holder.findViewById(R.id.divider).setVisibility(mHasSettings ? View.VISIBLE
+                    : View.GONE);
+            holder.findViewById(R.id.settings).setOnClickListener(v -> {
+                ResolveInfo result = v.getContext().getPackageManager().resolveActivity(
+                        new Intent(ACTION_PLUGIN_SETTINGS).setPackage(
+                                mComponent.getPackageName()), 0);
+                if (result != null) {
+                    v.getContext().startActivity(new Intent().setComponent(
+                            new ComponentName(result.activityInfo.packageName,
+                                    result.activityInfo.name)));
+                }
+            });
+        }
+    }
+}
diff --git a/packages/SystemUI/src/com/android/systemui/tuner/TunerFragment.java b/packages/SystemUI/src/com/android/systemui/tuner/TunerFragment.java
index 70f2fdcfa8d3..7f63418de324 100644
--- a/packages/SystemUI/src/com/android/systemui/tuner/TunerFragment.java
+++ b/packages/SystemUI/src/com/android/systemui/tuner/TunerFragment.java
@@ -19,16 +19,9 @@ import android.app.AlertDialog;
 import android.app.Dialog;
 import android.app.DialogFragment;
 import android.content.DialogInterface;
-import android.database.ContentObserver;
-import android.net.Uri;
 import android.os.Bundle;
-import android.os.Handler;
 import android.provider.Settings;
-import android.provider.Settings.System;
 import android.support.v14.preference.PreferenceFragment;
-import android.support.v14.preference.SwitchPreference;
-import android.support.v7.preference.Preference;
-import android.support.v7.preference.Preference.OnPreferenceChangeListener;
 import android.view.Menu;
 import android.view.MenuInflater;
 import android.view.MenuItem;
@@ -36,12 +29,14 @@ import android.view.MenuItem;
 import com.android.internal.logging.MetricsLogger;
 import com.android.internal.logging.MetricsProto.MetricsEvent;
 import com.android.systemui.R;
+import com.android.systemui.plugins.PluginPrefs;
 
 public class TunerFragment extends PreferenceFragment {
 
     private static final String TAG = "TunerFragment";
 
     private static final String KEY_BATTERY_PCT = "battery_pct";
+    private static final String KEY_PLUGINS = "plugins";
 
     public static final String SETTING_SEEN_TUNER_WARNING = "seen_tuner_warning";
 
@@ -65,6 +60,9 @@ public class TunerFragment extends PreferenceFragment {
     @Override
     public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
         addPreferencesFromResource(R.xml.tuner_prefs);
+        if (!PluginPrefs.hasPlugins(getContext())) {
+            getPreferenceScreen().removePreference(findPreference(KEY_PLUGINS));
+        }
 
         if (Settings.Secure.getInt(getContext().getContentResolver(), SETTING_SEEN_TUNER_WARNING,
                 0) == 0) {