1 /*
2  * Copyright (C) 2014 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  */
16 
17 package com.android.systemui;
18 
19 import android.app.Application;
20 import android.content.BroadcastReceiver;
21 import android.content.Context;
22 import android.content.Intent;
23 import android.content.IntentFilter;
24 import android.content.res.Configuration;
25 import android.os.SystemProperties;
26 import android.util.Log;
27 
28 import java.util.HashMap;
29 import java.util.Map;
30 
31 /**
32  * Application class for SystemUI.
33  */
34 public class SystemUIApplication extends Application {
35 
36     private static final String TAG = "SystemUIService";
37     private static final boolean DEBUG = false;
38 
39     /**
40      * The classes of the stuff to start.
41      */
42     private final Class<?>[] SERVICES = new Class[] {
43             com.android.systemui.tuner.TunerService.class,
44             com.android.systemui.keyguard.KeyguardViewMediator.class,
45             com.android.systemui.recents.Recents.class,
46             com.android.systemui.volume.VolumeUI.class,
47             com.android.systemui.statusbar.SystemBars.class,
48             com.android.systemui.usb.StorageNotification.class,
49             com.android.systemui.power.PowerUI.class,
50             com.android.systemui.media.RingtonePlayer.class,
51     };
52 
53     /**
54      * Hold a reference on the stuff we start.
55      */
56     private final SystemUI[] mServices = new SystemUI[SERVICES.length];
57     private boolean mServicesStarted;
58     private boolean mBootCompleted;
59     private final Map<Class<?>, Object> mComponents = new HashMap<Class<?>, Object>();
60 
61     @Override
onCreate()62     public void onCreate() {
63         super.onCreate();
64         // Set the application theme that is inherited by all services. Note that setting the
65         // application theme in the manifest does only work for activities. Keep this in sync with
66         // the theme set there.
67         setTheme(R.style.systemui_theme);
68 
69         IntentFilter filter = new IntentFilter(Intent.ACTION_BOOT_COMPLETED);
70         filter.setPriority(IntentFilter.SYSTEM_HIGH_PRIORITY);
71         registerReceiver(new BroadcastReceiver() {
72             @Override
73             public void onReceive(Context context, Intent intent) {
74                 if (mBootCompleted) return;
75 
76                 if (DEBUG) Log.v(TAG, "BOOT_COMPLETED received");
77                 unregisterReceiver(this);
78                 mBootCompleted = true;
79                 if (mServicesStarted) {
80                     final int N = mServices.length;
81                     for (int i = 0; i < N; i++) {
82                         mServices[i].onBootCompleted();
83                     }
84                 }
85             }
86         }, filter);
87     }
88 
89     /**
90      * Makes sure that all the SystemUI services are running. If they are already running, this is a
91      * no-op. This is needed to conditinally start all the services, as we only need to have it in
92      * the main process.
93      *
94      * <p>This method must only be called from the main thread.</p>
95      */
startServicesIfNeeded()96     public void startServicesIfNeeded() {
97         if (mServicesStarted) {
98             return;
99         }
100 
101         if (!mBootCompleted) {
102             // check to see if maybe it was already completed long before we began
103             // see ActivityManagerService.finishBooting()
104             if ("1".equals(SystemProperties.get("sys.boot_completed"))) {
105                 mBootCompleted = true;
106                 if (DEBUG) Log.v(TAG, "BOOT_COMPLETED was already sent");
107             }
108         }
109 
110         Log.v(TAG, "Starting SystemUI services.");
111         final int N = SERVICES.length;
112         for (int i=0; i<N; i++) {
113             Class<?> cl = SERVICES[i];
114             if (DEBUG) Log.d(TAG, "loading: " + cl);
115             try {
116                 mServices[i] = (SystemUI)cl.newInstance();
117             } catch (IllegalAccessException ex) {
118                 throw new RuntimeException(ex);
119             } catch (InstantiationException ex) {
120                 throw new RuntimeException(ex);
121             }
122             mServices[i].mContext = this;
123             mServices[i].mComponents = mComponents;
124             if (DEBUG) Log.d(TAG, "running: " + mServices[i]);
125             mServices[i].start();
126 
127             if (mBootCompleted) {
128                 mServices[i].onBootCompleted();
129             }
130         }
131         mServicesStarted = true;
132     }
133 
134     @Override
onConfigurationChanged(Configuration newConfig)135     public void onConfigurationChanged(Configuration newConfig) {
136         if (mServicesStarted) {
137             int len = mServices.length;
138             for (int i = 0; i < len; i++) {
139                 mServices[i].onConfigurationChanged(newConfig);
140             }
141         }
142     }
143 
144     @SuppressWarnings("unchecked")
getComponent(Class<T> interfaceType)145     public <T> T getComponent(Class<T> interfaceType) {
146         return (T) mComponents.get(interfaceType);
147     }
148 
getServices()149     public SystemUI[] getServices() {
150         return mServices;
151     }
152 }
153