Android framwork service添加(manager 远程调service，service jni调native code)
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Android framwork service添加(manager 远程调service，service jni调native code)
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在平常android應用開發中，多數只是調framwork中的API進行application layer的coding，而在系統開發中可能會自己添加系統服務；
系統服務如任何添加，服務如何調native code，以及service如何被manager調用...這里我給出一個結果驗證的demo。
1、實現編寫native code，framwork/base/services/jni/com_android_server_VirtualInputService.cpp;
static?JNINativeMethod?method_table[]?=?{?? ????{"native_open",?????????????"()I",(void?*)android_server_VirtualInputService_open},?? ????{"native_close",????????????"()Z",??(void?*)android_server_VirtualInputService_close},?? ????{"native_sendir",???????"(II)Z",??(void?*)android_server_VirtualInputService_sendir},?? };?? ????? +int?register_android_server_VirtualInputService(JNIEnv?*env)?? +{?? +????jclass?clazz?=?env->FindClass("com/android/server/VirtualInputService");?? +????if?(clazz?==?NULL)?{?? +????????ALOGE("Can't?find?com/android/server/VirtualInputService");?? +????????return?-1;?? +????}?? +????? +????return?jniRegisterNativeMethods(env,?"com/android/server/VirtualInputService",?? +????????????method_table,?NELEM(method_table));?? +}?? +};??
2、base/services/jni/onload.cpp中添加register_android_server_VirtualInputService
?int?register_android_server_SerialService(JNIEnv*?env);?? +int?register_android_server_VirtualInputService(JNIEnv*?env);?? ?int?register_android_server_UsbDeviceManager(JNIEnv*?env);?? ??? ??????register_android_server_SerialService(env);?? +???register_android_server_VirtualInputService(env);?? ?????register_android_server_InputApplicationHandle(env);??
3、mk中添加com_android_server_VirtualInputService，使其被編譯到
+++?base/services/jni/Android.mk????(working?copy)?? @@?-16,6?+16,7?@@?? ?????com_android_server_VibratorService.cpp?\?? ?????com_android_server_location_GpsLocationProvider.cpp?\?? ?????com_android_server_connectivity_Vpn.cpp?\?? +????com_android_server_VirtualInputService.cpp?\?? ?????onload.cpp??
4、service添加： base/services/java/com/android/server/VirtualInputService.java ??
? ?其必須繼承IVirtualInputManager.Stub使其能被遠程調用；
? ?聲明native方法：private native static int native_open();
?private native static boolean native_close();
private native static boolean native_sendir(int keycode, int type);
+package?com.android.server;?? +?? +import?android.content.Context;?? +import?android.hardware.input.IVirtualInputManager;?? +import?android.util.Log;?? +?? +import?java.io.File;?? +import?java.util.ArrayList;?? +?? +public?class?VirtualInputService?extends?IVirtualInputManager.Stub?{?? +????private?static?final?String?TAG?=?"VirtualInputManager";?? +?? +????private?final?Context?mContext;?? +????private?int?mVirtualInputFd?=?-1;?? +?? +????public?VirtualInputService(Context?context)?{?? +????????mContext?=?context;?? +???????if(mVirtualInputFd?==?-1){?? +???????????mVirtualInputFd?=?native_open();?? +???????????Log.d(TAG,?"mVirtualInputFd:"+mVirtualInputFd);?? +???????}else?? +???????????Log.d(TAG,?"mVirtualInputFd1:"+mVirtualInputFd);?? +?? +????}?? +?? +???public?boolean?SendIR(int?keycode){?? +???????if(mVirtualInputFd?>?0)?? +???????{????? +???????????Log.d(TAG,?"Service?SendIR:"+keycode);?? +???????????return?native_sendir(keycode,0);?? +???????}?? +???????else??? +???????????return?false;?? +???}?? +????? +????private?native?static?int?native_open();?? +???private?native?static?boolean?native_close();?? +???private?native?static?boolean?native_sendir(int?keycode,?int?type);?? +?? +}????
5、base/services/java/com/android/server/SystemServer.java中添加新service
SerialService?serial?=?null;?? VirtualInputService?VirtualInput?=?null;?? ?TwilightService?twilight?=?null;??
[java]?view plaincopy print? ?????????????try?{?? +????????????????Slog.i(TAG,?"VirtualInput?Service");?? +????????????????VirtualInput?=?new?VirtualInputService(context);?? +????????????????ServiceManager.addService(Context.VIRTUALINPUT_SERVICE,?VirtualInput);?? +????????????}?catch?(Throwable?e)?{?? +????????????????Slog.e(TAG,?"Failure?starting?VirtualInputService",?e);?? +????????????}?? +????????????? +????????????try?{?? ?????????????????Slog.i(TAG,?"Twilight?Service");?? ?????????????????twilight?=?new?TwilightService(context);?? ?????????????}?catch?(Throwable?e)?{??
6、添加aidl接口：base/core/java/android/hardware/input/IVirtualInputManager.aidl
+package?android.hardware.input;?? +?? +?? +/**?@hide?*/?? +interface?IVirtualInputManager?? +{?? +???boolean?SendIR(int?keycode);?? +}??
7、實現IVirtualInputManager.java;base/core/java/android/hardware/input/VirtualInputManager.java
+package?android.hardware.input;?? +?? +import?android.app.PendingIntent;?? +import?android.content.Context;?? +import?android.os.Bundle;?? +import?android.os.ParcelFileDescriptor;?? +import?android.os.RemoteException;?? +import?android.os.SystemProperties;?? +import?android.util.Log;?? +?? +import?java.io.IOException;?? +import?java.util.HashMap;?? +?? +/**? +?*?@hide? +?*/?? +public?class?VirtualInputManager?{?? +????private?static?final?String?TAG?=?"VirtualInputManager";?? +?? +????private?final?Context?mContext;?? +????private?final?IVirtualInputManager?mService;?? +?? +????/**? +?????*?{@hide}? +?????*/?? +????public?VirtualInputManager(Context?context,?IVirtualInputManager?service)?{?? +????????mContext?=?context;?? +????????mService?=?service;?? +???????Log.d(TAG,"VirtualInputManager");?? +????}?? +?? +???public?boolean?SendIR(int?keycode)?throws?android.os.RemoteException{?? +???????Log.d(TAG,"keycode:"+keycode);?? +???????return?mService.SendIR(keycode);?? +???}?? +}??
8.framwork/base/Android.mk
core/java/android/hardware/input/IInputManager.aidl?\?? core/java/android/hardware/input/IVirtualInputManager.aidl?\?? core/java/android/hardware/input/IInputDevicesChangedListener.aidl?\??
9、base/core/java/android/content/Context.java ?中添加系統獲取服務的標示?
+????public?static?final?String?VIRTUALINPUT_SERVICE?=?"virtualinput";??
10、base/core/java/android/app/ContextImpl.java
+????????registerService(VIRTUALINPUT_SERVICE,?new?ServiceFetcher()?{?? +????????????????public?Object?createService(ContextImpl?ctx)?{?? +????????????????????IBinder?b?=?ServiceManager.getService(VIRTUALINPUT_SERVICE);?? +????????????????????return?new?VirtualInputManager(ctx,?IVirtualInputManager.Stub.asInterface(b));?? +????????????????}});?? +?????????????????
系統服務如任何添加，服務如何調native code，以及service如何被manager調用...這里我給出一個結果驗證的demo。
1、實現編寫native code，framwork/base/services/jni/com_android_server_VirtualInputService.cpp;
? ?以下是會使用到的native 函數，以及register_android_server_VirtualInputService；具體實現就不在詳講了。
[java]?view plaincopy print?
2、base/services/jni/onload.cpp中添加register_android_server_VirtualInputService
[java]?view plaincopy print?
3、mk中添加com_android_server_VirtualInputService，使其被編譯到
[java]?view plaincopy print?
4、service添加： base/services/java/com/android/server/VirtualInputService.java ??
? ?其必須繼承IVirtualInputManager.Stub使其能被遠程調用；
? ?聲明native方法：private native static int native_open();
?private native static boolean native_close();
private native static boolean native_sendir(int keycode, int type);
[java]?view plaincopy print?
5、base/services/java/com/android/server/SystemServer.java中添加新service
[java]?view plaincopy print?
[java]?view plaincopy print?
6、添加aidl接口：base/core/java/android/hardware/input/IVirtualInputManager.aidl
[java]?view plaincopy print?
7、實現IVirtualInputManager.java;base/core/java/android/hardware/input/VirtualInputManager.java
[java]?view plaincopy print?
8.framwork/base/Android.mk
[java]?view plaincopy print?
9、base/core/java/android/content/Context.java ?中添加系統獲取服務的標示?
[java]?view plaincopy print?
10、base/core/java/android/app/ContextImpl.java
[java]?view plaincopy print?
? ?以上就是添加一個完整的service的步驟了...
原文地址：http://blog.csdn.net/cuityanxi/article/details/18082303
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