系统网站推广方案怎么做,链接网站制作,网站让百度收录应该怎么做,红酒网站制作SensorService中Binder案例 1、FWK实际操作在Native层2、Native层中代码实现Bn/Bp端2.1 代码实现Bn端2.2 代码实现Bp端2.2.1 模板interface_cast android12-release 1、FWK实际操作在Native层 SensorService.java实际操作Native层SensorService.cpp#xff1b;对应Bn服务端。 … SensorService中Binder案例 1、FWK实际操作在Native层2、Native层中代码实现Bn/Bp端2.1 代码实现Bn端2.2 代码实现Bp端2.2.1 模板interface_cast android12-release 1、FWK实际操作在Native层 SensorService.java实际操作Native层SensorService.cpp对应Bn服务端。 应用获取Context.SEARCH_SERVICE实际操作Native层SensorManager.cpp对应Bp客户端。 frameworks/base/services/core/java/com/android/server/sensors/SensorService.java
public SensorService(Context ctx) {super(ctx);synchronized (mLock) {mSensorServiceStart SystemServerInitThreadPool.submit(() - {TimingsTraceAndSlog traceLog TimingsTraceAndSlog.newAsyncLog();traceLog.traceBegin(START_NATIVE_SENSOR_SERVICE);long ptr startSensorServiceNative(new ProximityListenerDelegate());synchronized (mLock) {mPtr ptr;}traceLog.traceEnd();}, START_NATIVE_SENSOR_SERVICE);}
}Override
public void onStart() {LocalServices.addService(SensorManagerInternal.class, new LocalService());
}frameworks/base/core/java/android/hardware/SystemSensorManager.java
/** {hide} */
public SystemSensorManager(Context context, Looper mainLooper) {synchronized (sLock) {if (!sNativeClassInited) {sNativeClassInited true;nativeClassInit();}}mMainLooper mainLooper;ApplicationInfo appInfo context.getApplicationInfo();mTargetSdkLevel appInfo.targetSdkVersion;mContext context;mNativeInstance nativeCreate(context.getOpPackageName());mIsPackageDebuggable (0 ! (appInfo.flags ApplicationInfo.FLAG_DEBUGGABLE));PackageManager packageManager context.getPackageManager();mHasHighSamplingRateSensorsPermission (PERMISSION_GRANTED packageManager.checkPermission(HIGH_SAMPLING_RATE_SENSORS_PERMISSION,appInfo.packageName));// initialize the sensor listfor (int index 0;; index) {Sensor sensor new Sensor();if (!nativeGetSensorAtIndex(mNativeInstance, sensor, index)) break;mFullSensorsList.add(sensor);mHandleToSensor.put(sensor.getHandle(), sensor);}
}2、Native层中代码实现Bn/Bp端 ServiceManager中添加sensorservice frameworks/base/services/core/jni/com_android_server_sensor_SensorService.cpp
NativeSensorService::NativeSensorService(JNIEnv* env, jobject listener): mProximityActiveListenerDelegate(new ProximityActiveListenerDelegate(env, listener)) {if (base::GetBoolProperty(system_init.startsensorservice, true)) {spIServiceManager sm(defaultServiceManager());mService new SensorService();sm-addService(String16(SensorService::getServiceName()), mService,false /* allowIsolated */, IServiceManager::DUMP_FLAG_PRIORITY_CRITICAL);}
}2.1 代码实现Bn端 SensorService继承BnSensorServer实现onTransact方法一边Bp客户端调用Code标签对应调用方法Parcel data参数Parcel* reply接收返回值flags 0存在默认值。 frameworks/native/libs/sensor/include/sensor/ISensorServer.h
class BnSensorServer : public BnInterfaceISensorServer
{
public:virtual status_t shellCommand(int in, int out, int err,VectorString16 args) 0;virtual status_t onTransact( uint32_t code,const Parcel data,Parcel* reply,uint32_t flags 0);
};frameworks/native/libs/sensor/ISensorServer.cpp
enum {GET_SENSOR_LIST IBinder::FIRST_CALL_TRANSACTION,CREATE_SENSOR_EVENT_CONNECTION,ENABLE_DATA_INJECTION,GET_DYNAMIC_SENSOR_LIST,CREATE_SENSOR_DIRECT_CONNECTION,SET_OPERATION_PARAMETER,
};status_t BnSensorServer::onTransact(uint32_t code, const Parcel data, Parcel* reply, uint32_t flags)
{switch(code) {case GET_SENSOR_LIST: {CHECK_INTERFACE(ISensorServer, data, reply);const String16 opPackageName data.readString16();VectorSensor v(getSensorList(opPackageName));size_t n v.size();reply-writeUint32(static_castuint32_t(n));for (size_t i 0; i n; i) {reply-write(v[i]);}return NO_ERROR;}case CREATE_SENSOR_EVENT_CONNECTION: {CHECK_INTERFACE(ISensorServer, data, reply);String8 packageName data.readString8();int32_t mode data.readInt32();const String16 opPackageName data.readString16();const String16 attributionTag data.readString16();spISensorEventConnection connection(createSensorEventConnection(packageName, mode,opPackageName, attributionTag));reply-writeStrongBinder(IInterface::asBinder(connection));return NO_ERROR;}case ENABLE_DATA_INJECTION: {CHECK_INTERFACE(ISensorServer, data, reply);int32_t ret isDataInjectionEnabled();reply-writeInt32(static_castint32_t(ret));return NO_ERROR;}case GET_DYNAMIC_SENSOR_LIST: {CHECK_INTERFACE(ISensorServer, data, reply);const String16 opPackageName data.readString16();VectorSensor v(getDynamicSensorList(opPackageName));size_t n v.size();reply-writeUint32(static_castuint32_t(n));for (size_t i 0; i n; i) {reply-write(v[i]);}return NO_ERROR;}case CREATE_SENSOR_DIRECT_CONNECTION: {CHECK_INTERFACE(ISensorServer, data, reply);const String16 opPackageName data.readString16();uint32_t size data.readUint32();int32_t type data.readInt32();int32_t format data.readInt32();native_handle_t *resource data.readNativeHandle();// Avoid a crash in native_handle_close if resource is nullptrif (resource nullptr) {return BAD_VALUE;}spISensorEventConnection ch createSensorDirectConnection(opPackageName, size, type, format, resource);native_handle_close(resource);native_handle_delete(resource);reply-writeStrongBinder(IInterface::asBinder(ch));return NO_ERROR;}case SET_OPERATION_PARAMETER: {CHECK_INTERFACE(ISensorServer, data, reply);int32_t handle;int32_t type;Vectorfloat floats;Vectorint32_t ints;uint32_t count;handle data.readInt32();type data.readInt32();count data.readUint32();if (count (data.dataAvail() / sizeof(float))) {return BAD_VALUE;}floats.resize(count);for (auto i : floats) {i data.readFloat();}count data.readUint32();if (count (data.dataAvail() / sizeof(int32_t))) {return BAD_VALUE;}ints.resize(count);for (auto i : ints) {i data.readInt32();}int32_t ret setOperationParameter(handle, type, floats, ints);reply-writeInt32(ret);return NO_ERROR;}case SHELL_COMMAND_TRANSACTION: {int in data.readFileDescriptor();int out data.readFileDescriptor();int err data.readFileDescriptor();int argc data.readInt32();VectorString16 args;for (int i 0; i argc data.dataAvail() 0; i) {args.add(data.readString16());}spIBinder unusedCallback;spIResultReceiver resultReceiver;status_t status;if ((status data.readNullableStrongBinder(unusedCallback)) ! NO_ERROR) {return status;}if ((status data.readNullableStrongBinder(resultReceiver)) ! NO_ERROR) {return status;}status shellCommand(in, out, err, args);if (resultReceiver ! nullptr) {resultReceiver-send(status);}return NO_ERROR;}}return BBinder::onTransact(code, data, reply, flags);
}2.2 代码实现Bp端 应用获取Context.SEARCH_SERVICE实际操作Native层SensorManager.cpp对应Bp客户端获取查看 Binder系列2-ServiceManager 中模板interface_cast 模板::android::spBp##INTERFACE::make(obj) Bp端中方法如getSensorList()通过remote()-transact(GET_SENSOR_LIST, data, reply);最终调用到Bn端的onTransact方法GET_SENSOR_LIST作为Code标签调用对应方法Parcel data参数Parcel* reply接收返回值flags 0有默认值。 frameworks/native/libs/sensor/include/sensor/ISensorServer.h frameworks/native/libs/sensor/ISensorServer.cpp
enum {GET_SENSOR_LIST IBinder::FIRST_CALL_TRANSACTION,CREATE_SENSOR_EVENT_CONNECTION,ENABLE_DATA_INJECTION,GET_DYNAMIC_SENSOR_LIST,CREATE_SENSOR_DIRECT_CONNECTION,SET_OPERATION_PARAMETER,
};class BpSensorServer : public BpInterfaceISensorServer
{
public:explicit BpSensorServer(const spIBinder impl): BpInterfaceISensorServer(impl){}virtual ~BpSensorServer();virtual VectorSensor getSensorList(const String16 opPackageName){Parcel data, reply;data.writeInterfaceToken(ISensorServer::getInterfaceDescriptor());data.writeString16(opPackageName);remote()-transact(GET_SENSOR_LIST, data, reply);Sensor s;VectorSensor v;uint32_t n reply.readUint32();v.setCapacity(n);while (n) {n--;reply.read(s);v.add(s);}return v;}virtual VectorSensor getDynamicSensorList(const String16 opPackageName){Parcel data, reply;data.writeInterfaceToken(ISensorServer::getInterfaceDescriptor());data.writeString16(opPackageName);remote()-transact(GET_DYNAMIC_SENSOR_LIST, data, reply);Sensor s;VectorSensor v;uint32_t n reply.readUint32();v.setCapacity(n);while (n) {n--;reply.read(s);v.add(s);}return v;}virtual spISensorEventConnection createSensorEventConnection(const String8 packageName,int mode, const String16 opPackageName, const String16 attributionTag){Parcel data, reply;data.writeInterfaceToken(ISensorServer::getInterfaceDescriptor());data.writeString8(packageName);data.writeInt32(mode);data.writeString16(opPackageName);data.writeString16(attributionTag);remote()-transact(CREATE_SENSOR_EVENT_CONNECTION, data, reply);return interface_castISensorEventConnection(reply.readStrongBinder());}virtual int isDataInjectionEnabled() {Parcel data, reply;data.writeInterfaceToken(ISensorServer::getInterfaceDescriptor());remote()-transact(ENABLE_DATA_INJECTION, data, reply);return reply.readInt32();}virtual spISensorEventConnection createSensorDirectConnection(const String16 opPackageName,uint32_t size, int32_t type, int32_t format, const native_handle_t *resource) {Parcel data, reply;data.writeInterfaceToken(ISensorServer::getInterfaceDescriptor());data.writeString16(opPackageName);data.writeUint32(size);data.writeInt32(type);data.writeInt32(format);data.writeNativeHandle(resource);remote()-transact(CREATE_SENSOR_DIRECT_CONNECTION, data, reply);return interface_castISensorEventConnection(reply.readStrongBinder());}virtual int setOperationParameter(int32_t handle, int32_t type,const Vectorfloat floats,const Vectorint32_t ints) {Parcel data, reply;data.writeInterfaceToken(ISensorServer::getInterfaceDescriptor());data.writeInt32(handle);data.writeInt32(type);data.writeUint32(static_castuint32_t(floats.size()));for (auto i : floats) {data.writeFloat(i);}data.writeUint32(static_castuint32_t(ints.size()));for (auto i : ints) {data.writeInt32(i);}remote()-transact(SET_OPERATION_PARAMETER, data, reply);return reply.readInt32();}
};// Out-of-line virtual method definition to trigger vtable emission in this
// translation unit (see clang warning -Wweak-vtables)
BpSensorServer::~BpSensorServer() {}2.2.1 模板interface_cast 对应Bp客户端获取查看 Binder系列2-ServiceManager 中模板interface_cast 模板::android::spBp##INTERFACE::make(obj) frameworks/native/libs/binder/include/binder/IServiceManager.h
templatetypename INTERFACE
status_t getService(const String16 name, spINTERFACE* outService)
{const spIServiceManager sm defaultServiceManager();if (sm ! nullptr) {*outService interface_castINTERFACE(sm-getService(name));if ((*outService) ! nullptr) return NO_ERROR;}return NAME_NOT_FOUND;
}frameworks/native/libs/binder/include/binder/IInterface.h
//... ...
templatetypename INTERFACE
inline spINTERFACE interface_cast(const spIBinder obj)
{return INTERFACE::asInterface(obj);
}
//... ...static ::android::spI##INTERFACE asInterface( \const ::android::sp::android::IBinder obj); \
//... ...::android::spI##INTERFACE I##INTERFACE::asInterface( \const ::android::sp::android::IBinder obj) \{ \::android::spI##INTERFACE intr; \if (obj ! nullptr) { \intr ::android::spI##INTERFACE::cast( \obj-queryLocalInterface(I##INTERFACE::descriptor)); \if (intr nullptr) { \intr ::android::spBp##INTERFACE::make(obj); \} \} \return intr; \} \
