TunerService.java revision abe1974a11364b577e94966ca87047d7889c8edf 
1/*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License
15 */
16package com.android.systemui.tuner;
17
18import android.app.ActivityManager;
19import android.content.BroadcastReceiver;
20import android.content.ComponentName;
21import android.content.ContentResolver;
22import android.content.Context;
23import android.content.DialogInterface;
24import android.content.DialogInterface.OnClickListener;
25import android.content.Intent;
26import android.content.pm.PackageManager;
27import android.content.pm.PackageManager.NameNotFoundException;
28import android.database.ContentObserver;
29import android.net.Uri;
30import android.os.Handler;
31import android.os.Looper;
32import android.os.UserHandle;
33import android.provider.Settings;
34import android.util.ArrayMap;
35
36import com.android.systemui.BatteryMeterDrawable;
37import com.android.systemui.DemoMode;
38import com.android.systemui.R;
39import com.android.systemui.SystemUI;
40import com.android.systemui.SystemUIApplication;
41import com.android.systemui.settings.CurrentUserTracker;
42import com.android.systemui.statusbar.phone.SystemUIDialog;
43
44import java.util.ArrayList;
45import java.util.HashMap;
46import java.util.List;
47
48
49public class TunerService extends SystemUI {
50
51    public static final String ACTION_CLEAR = "com.android.systemui.action.CLEAR_TUNER";
52
53    private final Observer mObserver = new Observer();
54    // Map of Uris we listen on to their settings keys.
55    private final ArrayMap<Uri, String> mListeningUris = new ArrayMap<>();
56    // Map of settings keys to the listener.
57    private final HashMap<String, List<Tunable>> mTunableLookup = new HashMap<>();
58
59    private ContentResolver mContentResolver;
60    private int mCurrentUser;
61    private CurrentUserTracker mUserTracker;
62
63    @Override
64    public void start() {
65        mContentResolver = mContext.getContentResolver();
66        putComponent(TunerService.class, this);
67
68        mCurrentUser = ActivityManager.getCurrentUser();
69        mUserTracker = new CurrentUserTracker(mContext) {
70            @Override
71            public void onUserSwitched(int newUserId) {
72                mCurrentUser = newUserId;
73                reloadAll();
74                reregisterAll();
75            }
76        };
77        mUserTracker.startTracking();
78    }
79
80    public void addTunable(Tunable tunable, String... keys) {
81        for (String key : keys) {
82            addTunable(tunable, key);
83        }
84    }
85
86    private void addTunable(Tunable tunable, String key) {
87        if (!mTunableLookup.containsKey(key)) {
88            mTunableLookup.put(key, new ArrayList<Tunable>());
89        }
90        mTunableLookup.get(key).add(tunable);
91        Uri uri = Settings.Secure.getUriFor(key);
92        if (!mListeningUris.containsKey(uri)) {
93            mListeningUris.put(uri, key);
94            mContentResolver.registerContentObserver(uri, false, mObserver, mCurrentUser);
95        }
96        // Send the first state.
97        String value = Settings.Secure.getStringForUser(mContentResolver, key, mCurrentUser);
98        tunable.onTuningChanged(key, value);
99    }
100
101    public void removeTunable(Tunable tunable) {
102        for (List<Tunable> list : mTunableLookup.values()) {
103            list.remove(tunable);
104        }
105    }
106
107    protected void reregisterAll() {
108        if (mListeningUris.size() == 0) {
109            return;
110        }
111        mContentResolver.unregisterContentObserver(mObserver);
112        for (Uri uri : mListeningUris.keySet()) {
113            mContentResolver.registerContentObserver(uri, false, mObserver, mCurrentUser);
114        }
115    }
116
117    public void reloadSetting(Uri uri) {
118        String key = mListeningUris.get(uri);
119        String value = Settings.Secure.getStringForUser(mContentResolver, key, mCurrentUser);
120        for (Tunable tunable : mTunableLookup.get(key)) {
121            tunable.onTuningChanged(key, value);
122        }
123    }
124
125    private void reloadAll() {
126        for (String key : mTunableLookup.keySet()) {
127            String value = Settings.Secure.getStringForUser(mContentResolver, key,
128                    mCurrentUser);
129            for (Tunable tunable : mTunableLookup.get(key)) {
130                tunable.onTuningChanged(key, value);
131            }
132        }
133    }
134
135    public void clearAll() {
136        // A couple special cases.
137        Settings.Global.putString(mContentResolver, DemoMode.DEMO_MODE_ALLOWED, null);
138        Settings.System.putString(mContentResolver, BatteryMeterDrawable.SHOW_PERCENT_SETTING, null);
139        Intent intent = new Intent(DemoMode.ACTION_DEMO);
140        intent.putExtra(DemoMode.EXTRA_COMMAND, DemoMode.COMMAND_EXIT);
141        mContext.sendBroadcast(intent);
142
143        for (String key : mTunableLookup.keySet()) {
144            Settings.Secure.putString(mContentResolver, key, null);
145        }
146    }
147
148    // Only used in other processes, such as the tuner.
149    private static TunerService sInstance;
150
151    public static TunerService get(Context context) {
152        SystemUIApplication sysUi = (SystemUIApplication) context.getApplicationContext();
153        TunerService service = sysUi.getComponent(TunerService.class);
154        if (service == null) {
155            // Can't get it as a component, must in the tuner, lets just create one for now.
156            return getStaticService(context);
157        }
158        return service;
159    }
160
161    private static TunerService getStaticService(Context context) {
162        if (sInstance == null) {
163            sInstance = new TunerService();
164            sInstance.mContext = context.getApplicationContext();
165            sInstance.mComponents = new HashMap<>();
166            sInstance.start();
167        }
168        return sInstance;
169    }
170
171    public static final void showResetRequest(final Context context, final Runnable onDisabled) {
172        SystemUIDialog dialog = new SystemUIDialog(context);
173        dialog.setShowForAllUsers(true);
174        dialog.setMessage(R.string.remove_from_settings_prompt);
175        dialog.setButton(DialogInterface.BUTTON_NEGATIVE, context.getString(R.string.cancel),
176                (OnClickListener) null);
177        dialog.setButton(DialogInterface.BUTTON_POSITIVE,
178                context.getString(R.string.guest_exit_guest_dialog_remove), new OnClickListener() {
179            @Override
180            public void onClick(DialogInterface dialog, int which) {
181                // Tell the tuner (in main SysUI process) to clear all its settings.
182                context.sendBroadcast(new Intent(TunerService.ACTION_CLEAR));
183                // Disable access to tuner.
184                TunerService.setTunerEnabled(context, false);
185                // Make them sit through the warning dialog again.
186                Settings.Secure.putInt(context.getContentResolver(),
187                        TunerFragment.SETTING_SEEN_TUNER_WARNING, 0);
188                if (onDisabled != null) {
189                    onDisabled.run();
190                }
191            }
192        });
193        dialog.show();
194    }
195
196    public static final void setTunerEnabled(Context context, boolean enabled) {
197        userContext(context).getPackageManager().setComponentEnabledSetting(
198                new ComponentName(context, TunerActivity.class),
199                enabled ? PackageManager.COMPONENT_ENABLED_STATE_ENABLED
200                        : PackageManager.COMPONENT_ENABLED_STATE_DISABLED,
201                        PackageManager.DONT_KILL_APP);
202    }
203
204    public static final boolean isTunerEnabled(Context context) {
205        return userContext(context).getPackageManager().getComponentEnabledSetting(
206                new ComponentName(context, TunerActivity.class))
207                == PackageManager.COMPONENT_ENABLED_STATE_ENABLED;
208    }
209
210    private static Context userContext(Context context) {
211        try {
212            return context.createPackageContextAsUser(context.getPackageName(), 0,
213                    new UserHandle(ActivityManager.getCurrentUser()));
214        } catch (NameNotFoundException e) {
215            return context;
216        }
217    }
218
219    private class Observer extends ContentObserver {
220        public Observer() {
221            super(new Handler(Looper.getMainLooper()));
222        }
223
224        @Override
225        public void onChange(boolean selfChange, Uri uri, int userId) {
226            if (userId == ActivityManager.getCurrentUser()) {
227                reloadSetting(uri);
228            }
229        }
230    }
231
232    public interface Tunable {
233        void onTuningChanged(String key, String newValue);
234    }
235
236    public static class ClearReceiver extends BroadcastReceiver {
237        @Override
238        public void onReceive(Context context, Intent intent) {
239            if (ACTION_CLEAR.equals(intent.getAction())) {
240                get(context).clearAll();
241            }
242        }
243    }
244}
245