Dianne Hackborn | 21f1bd1 | 2010-02-19 17:02:21 -0800 | [diff] [blame] | 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 | |
| 17 | package com.android.server; |
| 18 | |
| 19 | import com.android.internal.content.PackageMonitor; |
| 20 | |
| 21 | import android.content.ComponentName; |
| 22 | import android.content.Context; |
| 23 | import android.content.Intent; |
| 24 | import android.content.pm.ResolveInfo; |
| 25 | import android.content.pm.ServiceInfo; |
| 26 | import android.content.pm.PackageManager.NameNotFoundException; |
| 27 | import android.os.Binder; |
| 28 | import android.provider.Settings; |
| 29 | import android.speech.RecognitionService; |
| 30 | import android.text.TextUtils; |
Joe Onorato | 8a9b220 | 2010-02-26 18:56:32 -0800 | [diff] [blame] | 31 | import android.util.Slog; |
Dianne Hackborn | 21f1bd1 | 2010-02-19 17:02:21 -0800 | [diff] [blame] | 32 | |
| 33 | import java.util.List; |
| 34 | |
| 35 | public class RecognitionManagerService extends Binder { |
| 36 | final static String TAG = "RecognitionManagerService"; |
| 37 | |
| 38 | final Context mContext; |
| 39 | final MyPackageMonitor mMonitor; |
| 40 | |
| 41 | class MyPackageMonitor extends PackageMonitor { |
| 42 | public void onSomePackagesChanged() { |
| 43 | ComponentName comp = getCurRecognizer(); |
| 44 | if (comp == null) { |
| 45 | if (anyPackagesAppearing()) { |
| 46 | comp = findAvailRecognizer(null); |
| 47 | if (comp != null) { |
| 48 | setCurRecognizer(comp); |
| 49 | } |
| 50 | } |
| 51 | return; |
| 52 | } |
| 53 | |
| 54 | int change = isPackageDisappearing(comp.getPackageName()); |
| 55 | if (change == PACKAGE_PERMANENT_CHANGE |
| 56 | || change == PACKAGE_TEMPORARY_CHANGE) { |
| 57 | setCurRecognizer(findAvailRecognizer(null)); |
| 58 | |
| 59 | } else if (isPackageModified(comp.getPackageName())) { |
| 60 | setCurRecognizer(findAvailRecognizer(comp.getPackageName())); |
| 61 | } |
| 62 | } |
| 63 | } |
| 64 | |
| 65 | RecognitionManagerService(Context context) { |
| 66 | mContext = context; |
| 67 | mMonitor = new MyPackageMonitor(); |
| 68 | mMonitor.register(context, true); |
| 69 | } |
| 70 | |
| 71 | public void systemReady() { |
| 72 | ComponentName comp = getCurRecognizer(); |
| 73 | if (comp != null) { |
| 74 | // See if the current recognizer is no longer available. |
| 75 | try { |
| 76 | mContext.getPackageManager().getServiceInfo(comp, 0); |
| 77 | } catch (NameNotFoundException e) { |
| 78 | setCurRecognizer(null); |
| 79 | } |
| 80 | } else { |
| 81 | comp = findAvailRecognizer(null); |
| 82 | if (comp != null) { |
| 83 | setCurRecognizer(comp); |
| 84 | } |
| 85 | } |
| 86 | } |
| 87 | |
| 88 | ComponentName findAvailRecognizer(String prefPackage) { |
| 89 | List<ResolveInfo> available = |
| 90 | mContext.getPackageManager().queryIntentServices( |
| 91 | new Intent(RecognitionService.SERVICE_INTERFACE), 0); |
| 92 | int numAvailable = available.size(); |
| 93 | |
| 94 | if (numAvailable == 0) { |
Joe Onorato | 8a9b220 | 2010-02-26 18:56:32 -0800 | [diff] [blame] | 95 | Slog.w(TAG, "no available voice recognition services found"); |
Dianne Hackborn | 21f1bd1 | 2010-02-19 17:02:21 -0800 | [diff] [blame] | 96 | return null; |
| 97 | } else { |
| 98 | if (prefPackage != null) { |
| 99 | for (int i=0; i<numAvailable; i++) { |
| 100 | ServiceInfo serviceInfo = available.get(i).serviceInfo; |
| 101 | if (prefPackage.equals(serviceInfo.packageName)) { |
| 102 | return new ComponentName(serviceInfo.packageName, serviceInfo.name); |
| 103 | } |
| 104 | } |
| 105 | } |
| 106 | if (numAvailable > 1) { |
Joe Onorato | 8a9b220 | 2010-02-26 18:56:32 -0800 | [diff] [blame] | 107 | Slog.w(TAG, "more than one voice recognition service found, picking first"); |
Dianne Hackborn | 21f1bd1 | 2010-02-19 17:02:21 -0800 | [diff] [blame] | 108 | } |
| 109 | |
| 110 | ServiceInfo serviceInfo = available.get(0).serviceInfo; |
| 111 | return new ComponentName(serviceInfo.packageName, serviceInfo.name); |
| 112 | } |
| 113 | } |
| 114 | |
| 115 | ComponentName getCurRecognizer() { |
| 116 | String curRecognizer = Settings.Secure.getString( |
| 117 | mContext.getContentResolver(), |
| 118 | Settings.Secure.VOICE_RECOGNITION_SERVICE); |
| 119 | if (TextUtils.isEmpty(curRecognizer)) { |
| 120 | return null; |
| 121 | } |
| 122 | return ComponentName.unflattenFromString(curRecognizer); |
| 123 | } |
| 124 | |
| 125 | void setCurRecognizer(ComponentName comp) { |
| 126 | Settings.Secure.putString(mContext.getContentResolver(), |
| 127 | Settings.Secure.VOICE_RECOGNITION_SERVICE, |
| 128 | comp != null ? comp.flattenToShortString() : ""); |
| 129 | } |
| 130 | } |