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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.server;
import com.android.internal.content.PackageMonitor;
import android.app.AppGlobals;
import android.content.BroadcastReceiver;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.pm.IPackageManager;
import android.content.pm.ResolveInfo;
import android.content.pm.ServiceInfo;
import android.os.Binder;
import android.os.RemoteException;
import android.os.UserHandle;
import android.provider.Settings;
import android.speech.RecognitionService;
import android.text.TextUtils;
import android.util.Slog;
import java.util.List;
public class RecognitionManagerService extends Binder {
final static String TAG = "RecognitionManagerService";
private final Context mContext;
private final MyPackageMonitor mMonitor;
private final IPackageManager mIPm;
private static final boolean DEBUG = false;
class MyPackageMonitor extends PackageMonitor {
public void onSomePackagesChanged() {
int userHandle = getChangingUserId();
if (DEBUG) Slog.i(TAG, "onSomePackagesChanged user=" + userHandle);
ComponentName comp = getCurRecognizer(userHandle);
if (comp == null) {
if (anyPackagesAppearing()) {
comp = findAvailRecognizer(null, userHandle);
if (comp != null) {
setCurRecognizer(comp, userHandle);
}
}
return;
}
int change = isPackageDisappearing(comp.getPackageName());
if (change == PACKAGE_PERMANENT_CHANGE
|| change == PACKAGE_TEMPORARY_CHANGE) {
setCurRecognizer(findAvailRecognizer(null, userHandle), userHandle);
} else if (isPackageModified(comp.getPackageName())) {
setCurRecognizer(findAvailRecognizer(comp.getPackageName(), userHandle),
userHandle);
}
}
}
RecognitionManagerService(Context context) {
mContext = context;
mMonitor = new MyPackageMonitor();
mMonitor.register(context, null, UserHandle.ALL, true);
mIPm = AppGlobals.getPackageManager();
mContext.registerReceiverAsUser(mBroadcastReceiver, UserHandle.ALL,
new IntentFilter(Intent.ACTION_BOOT_COMPLETED), null, null);
}
public void systemReady() {
initForUser(UserHandle.USER_OWNER);
}
private void initForUser(int userHandle) {
if (DEBUG) Slog.i(TAG, "initForUser user=" + userHandle);
ComponentName comp = getCurRecognizer(userHandle);
ServiceInfo info = null;
if (comp != null) {
// See if the current recognizer is still available.
try {
info = mIPm.getServiceInfo(comp, 0, userHandle);
} catch (RemoteException e) {
}
}
if (info == null) {
comp = findAvailRecognizer(null, userHandle);
if (comp != null) {
setCurRecognizer(comp, userHandle);
}
}
}
ComponentName findAvailRecognizer(String prefPackage, int userHandle) {
List<ResolveInfo> available =
mContext.getPackageManager().queryIntentServicesAsUser(
new Intent(RecognitionService.SERVICE_INTERFACE), 0, userHandle);
int numAvailable = available.size();
if (numAvailable == 0) {
Slog.w(TAG, "no available voice recognition services found for user " + userHandle);
return null;
} else {
if (prefPackage != null) {
for (int i=0; i<numAvailable; i++) {
ServiceInfo serviceInfo = available.get(i).serviceInfo;
if (prefPackage.equals(serviceInfo.packageName)) {
return new ComponentName(serviceInfo.packageName, serviceInfo.name);
}
}
}
if (numAvailable > 1) {
Slog.w(TAG, "more than one voice recognition service found, picking first");
}
ServiceInfo serviceInfo = available.get(0).serviceInfo;
return new ComponentName(serviceInfo.packageName, serviceInfo.name);
}
}
ComponentName getCurRecognizer(int userHandle) {
String curRecognizer = Settings.Secure.getStringForUser(
mContext.getContentResolver(),
Settings.Secure.VOICE_RECOGNITION_SERVICE, userHandle);
if (TextUtils.isEmpty(curRecognizer)) {
return null;
}
if (DEBUG) Slog.i(TAG, "getCurRecognizer curRecognizer=" + curRecognizer
+ " user=" + userHandle);
return ComponentName.unflattenFromString(curRecognizer);
}
void setCurRecognizer(ComponentName comp, int userHandle) {
Settings.Secure.putStringForUser(mContext.getContentResolver(),
Settings.Secure.VOICE_RECOGNITION_SERVICE,
comp != null ? comp.flattenToShortString() : "", userHandle);
if (DEBUG) Slog.i(TAG, "setCurRecognizer comp=" + comp
+ " user=" + userHandle);
}
BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() {
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (DEBUG) Slog.i(TAG, "received " + action);
if (Intent.ACTION_BOOT_COMPLETED.equals(action)) {
int userHandle = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, -1);
if (userHandle > 0) {
initForUser(userHandle);
}
}
}
};
}
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