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
17package com.android.systemui;
18
19import android.app.Application;
20import android.content.BroadcastReceiver;
21import android.content.Context;
22import android.content.Intent;
23import android.content.IntentFilter;
24import android.content.res.Configuration;
25import android.os.SystemProperties;
26import android.util.Log;
27
28import java.util.HashMap;
29import java.util.Map;
30
31/**
32 * Application class for SystemUI.
33 */
34public 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