SystemUIService.java revision f3c3c4fd14cb4185ec6df5a4355aab8b9f4039dc 
1/*
2 * Copyright (C) 2010 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 java.io.FileDescriptor;
20import java.io.PrintWriter;
21
22import android.app.Service;
23import android.content.BroadcastReceiver;
24import android.content.Context;
25import android.content.Intent;
26import android.content.pm.PackageManager;
27import android.os.Binder;
28import android.os.IBinder;
29import android.util.Slog;
30
31public class SystemUIService extends Service {
32    static final String TAG = "SystemUIService";
33
34    /**
35     * The class names of the stuff to start.
36     */
37    final Object[] SERVICES = new Object[] {
38            R.string.config_statusBarComponent,
39        };
40
41    /**
42     * Hold a reference on the stuff we start.
43     */
44    SystemUI[] mServices;
45
46    private Class chooseClass(Object o) {
47        if (o instanceof Integer) {
48            final String cl = getString((Integer)o);
49            try {
50                return getClassLoader().loadClass(cl);
51            } catch (ClassNotFoundException ex) {
52                throw new RuntimeException(ex);
53            }
54        } else if (o instanceof Class) {
55            return (Class)o;
56        } else {
57            throw new RuntimeException("Unknown system ui service: " + o);
58        }
59    }
60
61    @Override
62    public void onCreate() {
63        final int N = SERVICES.length;
64        mServices = new SystemUI[N];
65        for (int i=0; i<N; i++) {
66            Class cl = chooseClass(SERVICES[i]);
67            Slog.d(TAG, "loading: " + cl);
68            try {
69                mServices[i] = (SystemUI)cl.newInstance();
70            } catch (IllegalAccessException ex) {
71                throw new RuntimeException(ex);
72            } catch (InstantiationException ex) {
73                throw new RuntimeException(ex);
74            }
75            mServices[i].mContext = this;
76            Slog.d(TAG, "running: " + mServices[i]);
77            mServices[i].start();
78        }
79    }
80
81    /**
82     * Nobody binds to us.
83     */
84    @Override
85    public IBinder onBind(Intent intent) {
86        return null;
87    }
88
89    @Override
90    protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
91        if (checkCallingOrSelfPermission(android.Manifest.permission.DUMP)
92                != PackageManager.PERMISSION_GRANTED) {
93            pw.println("Permission Denial: can't dump StatusBar from from pid="
94                    + Binder.getCallingPid()
95                    + ", uid=" + Binder.getCallingUid());
96            return;
97        }
98
99        for (SystemUI ui: mServices) {
100            pw.println("dumping service: " + ui.getClass().getName());
101            ui.dump(fd, pw, args);
102        }
103    }
104}
105
106