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