Android5.1 Framework分析----如何在SystemServer中添加系统服务

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package android.app;
interface ITtsManager {
int speak(String message, String from);
int stop();
}

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LOCAL_SRC_FILES += 
....
core/java/android/app/ITtsManager.aidl 
....

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package com.android.server.tts;
import android.content.Context;
import android.speech.tts.TtsEngines;
import android.speech.tts.TextToSpeech;
import android.os.Handler;
import android.util.Log;
import android.app.ITtsManager;
public final class TtsManagerService extends ITtsManager.Stub {
private static final String TAG = "TtsManagerService";
final Context mContext;
private final TextToSpeech mTts;
public TtsManagerService(Context context) {
Log.d(TAG, "Tts init complete");
}
@Override
public int speak(String message, String from) {
//TODO:
return 0;
}
@Override
public int stop() {<pre name="code" class="java">
//TODO:
return 0;

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package android.os;
import android.content.Context;
public class TtsManager {
final ITtsManager mService;
final Context mContext;
public TtsManager(Context context, ITtsManager service) {
mContext = context;
mService = service;
}
public int speak(String message, String from) {
try {
return mService.speak(message, from);
} catch (RemoteException e) {
e.printStackTrace();
return -1;
}
}
public int stop() {
try {
return mService.stop();
} catch (RemoteException e) {
e.printStackTrace();
return -1;
}
}
}

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/// M: comment @{ add TtsManagerService by Lee
if ("1".equals(SystemProperties.get("ro.qxt.tts.support"))) {
registerService("qxttts", new ServiceFetcher() {
public Object createService(ContextImpl ctx) {
IBinder b = ServiceManager.getService("qxttts"); //注意：qxttts 是服务名称
return new TtsManager(ctx, ITtsManager.Stub.asInterface(b));
} });
}
/// @}

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try {
Slog.i(TAG, "Tts Manager");
ServiceManager.addService("qxttts", new TtsManagerService(context)); //服务名称qxttts与上面对应
} catch (Throwable e) {
Slog.e(TAG, "Failure starting Tts Manager", e);
}

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((TtsManager)getSystemService("qxttts")).speak("测试用语", "activity");

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ServiceManager(
232): add_service('qxttts',45) uid=1000 - PERMISSION DENIED

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#Lee add begin
qxttts
u:object_r:system_server_service:s0
#Lee add end