| /* |
| * 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. |
| */ |
| |
| #define LOG_TAG "NativeActivity" |
| #include <utils/Log.h> |
| |
| #include <poll.h> |
| #include <dlfcn.h> |
| |
| #include <android_runtime/AndroidRuntime.h> |
| #include <android_runtime/android_view_Surface.h> |
| #include <android_runtime/android_app_NativeActivity.h> |
| #include <surfaceflinger/Surface.h> |
| #include <ui/egl/android_natives.h> |
| #include <ui/InputTransport.h> |
| #include <utils/PollLoop.h> |
| |
| #include "JNIHelp.h" |
| #include "android_os_MessageQueue.h" |
| #include "android_view_InputChannel.h" |
| #include "android_view_KeyEvent.h" |
| |
| namespace android |
| { |
| |
| static struct { |
| jclass clazz; |
| |
| jmethodID dispatchUnhandledKeyEvent; |
| jmethodID setWindowFlags; |
| jmethodID setWindowFormat; |
| } gNativeActivityClassInfo; |
| |
| // ------------------------------------------------------------------------ |
| |
| struct ActivityWork { |
| int32_t cmd; |
| int32_t arg1; |
| int32_t arg2; |
| }; |
| |
| enum { |
| CMD_DEF_KEY = 1, |
| CMD_SET_WINDOW_FORMAT, |
| CMD_SET_WINDOW_FLAGS, |
| }; |
| |
| static void write_work(int fd, int32_t cmd, int32_t arg1=0, int32_t arg2=0) { |
| ActivityWork work; |
| work.cmd = cmd; |
| work.arg1 = arg1; |
| work.arg2 = arg2; |
| |
| restart: |
| int res = write(fd, &work, sizeof(work)); |
| if (res < 0 && errno == EINTR) { |
| goto restart; |
| } |
| |
| if (res == sizeof(work)) return; |
| |
| if (res < 0) LOGW("Failed writing to work fd: %s", strerror(errno)); |
| else LOGW("Truncated writing to work fd: %d", res); |
| } |
| |
| static bool read_work(int fd, ActivityWork* outWork) { |
| int res = read(fd, outWork, sizeof(ActivityWork)); |
| // no need to worry about EINTR, poll loop will just come back again. |
| if (res == sizeof(ActivityWork)) return true; |
| |
| if (res < 0) LOGW("Failed reading work fd: %s", strerror(errno)); |
| else LOGW("Truncated reading work fd: %d", res); |
| return false; |
| } |
| |
| // ------------------------------------------------------------------------ |
| |
| /* |
| * Specialized input queue that allows unhandled key events to be dispatched |
| * back to the native activity's Java framework code. |
| */ |
| struct MyInputQueue : AInputQueue { |
| explicit MyInputQueue(const android::sp<android::InputChannel>& channel, int workWrite) |
| : AInputQueue(channel), mWorkWrite(workWrite) { |
| } |
| |
| virtual void doDefaultKey(android::KeyEvent* keyEvent) { |
| mLock.lock(); |
| LOGI("Default key: pending=%d write=%d\n", mPendingKeys.size(), mWorkWrite); |
| if (mPendingKeys.size() <= 0 && mWorkWrite >= 0) { |
| write_work(mWorkWrite, CMD_DEF_KEY); |
| } |
| mPendingKeys.add(keyEvent); |
| mLock.unlock(); |
| } |
| |
| KeyEvent* getNextEvent() { |
| KeyEvent* event = NULL; |
| |
| mLock.lock(); |
| if (mPendingKeys.size() > 0) { |
| event = mPendingKeys[0]; |
| mPendingKeys.removeAt(0); |
| } |
| mLock.unlock(); |
| |
| return event; |
| } |
| |
| int mWorkWrite; |
| |
| Mutex mLock; |
| Vector<KeyEvent*> mPendingKeys; |
| }; |
| |
| // ------------------------------------------------------------------------ |
| |
| /* |
| * Native state for interacting with the NativeActivity class. |
| */ |
| struct NativeCode : public ANativeActivity { |
| NativeCode(void* _dlhandle, ANativeActivity_createFunc* _createFunc) { |
| memset((ANativeActivity*)this, sizeof(ANativeActivity), 0); |
| memset(&callbacks, sizeof(callbacks), 0); |
| dlhandle = _dlhandle; |
| createActivityFunc = _createFunc; |
| nativeWindow = NULL; |
| inputChannel = NULL; |
| nativeInputQueue = NULL; |
| mainWorkRead = mainWorkWrite = -1; |
| } |
| |
| ~NativeCode() { |
| if (callbacks.onDestroy != NULL) { |
| callbacks.onDestroy(this); |
| } |
| if (env != NULL && clazz != NULL) { |
| env->DeleteGlobalRef(clazz); |
| } |
| if (pollLoop != NULL && mainWorkRead >= 0) { |
| pollLoop->removeCallback(mainWorkRead); |
| } |
| if (nativeInputQueue != NULL) { |
| nativeInputQueue->mWorkWrite = -1; |
| } |
| setSurface(NULL); |
| setInputChannel(NULL); |
| if (mainWorkRead >= 0) close(mainWorkRead); |
| if (mainWorkWrite >= 0) close(mainWorkWrite); |
| if (dlhandle != NULL) { |
| // for now don't unload... we probably should clean this |
| // up and only keep one open dlhandle per proc, since there |
| // is really no benefit to unloading the code. |
| //dlclose(dlhandle); |
| } |
| } |
| |
| void setSurface(jobject _surface) { |
| if (_surface != NULL) { |
| nativeWindow = android_Surface_getNativeWindow(env, _surface); |
| } else { |
| nativeWindow = NULL; |
| } |
| } |
| |
| status_t setInputChannel(jobject _channel) { |
| if (inputChannel != NULL) { |
| delete nativeInputQueue; |
| env->DeleteGlobalRef(inputChannel); |
| } |
| inputChannel = NULL; |
| nativeInputQueue = NULL; |
| if (_channel != NULL) { |
| inputChannel = env->NewGlobalRef(_channel); |
| sp<InputChannel> ic = |
| android_view_InputChannel_getInputChannel(env, _channel); |
| if (ic != NULL) { |
| nativeInputQueue = new MyInputQueue(ic, mainWorkWrite); |
| if (nativeInputQueue->getConsumer().initialize() != android::OK) { |
| delete nativeInputQueue; |
| nativeInputQueue = NULL; |
| return UNKNOWN_ERROR; |
| } |
| } else { |
| return UNKNOWN_ERROR; |
| } |
| } |
| return OK; |
| } |
| |
| ANativeActivityCallbacks callbacks; |
| |
| void* dlhandle; |
| ANativeActivity_createFunc* createActivityFunc; |
| |
| String8 internalDataPath; |
| String8 externalDataPath; |
| |
| sp<ANativeWindow> nativeWindow; |
| jobject inputChannel; |
| struct MyInputQueue* nativeInputQueue; |
| |
| // These are used to wake up the main thread to process work. |
| int mainWorkRead; |
| int mainWorkWrite; |
| sp<PollLoop> pollLoop; |
| }; |
| |
| void android_NativeActivity_setWindowFormat( |
| ANativeActivity* activity, int32_t format) { |
| NativeCode* code = static_cast<NativeCode*>(activity); |
| write_work(code->mainWorkWrite, CMD_SET_WINDOW_FORMAT, format); |
| } |
| |
| void android_NativeActivity_setWindowFlags( |
| ANativeActivity* activity, int32_t values, int32_t mask) { |
| NativeCode* code = static_cast<NativeCode*>(activity); |
| write_work(code->mainWorkWrite, CMD_SET_WINDOW_FLAGS, values, mask); |
| } |
| |
| // ------------------------------------------------------------------------ |
| |
| /* |
| * Callback for handling native events on the application's main thread. |
| */ |
| static bool mainWorkCallback(int fd, int events, void* data) { |
| NativeCode* code = (NativeCode*)data; |
| if ((events & POLLIN) == 0) { |
| return true; |
| } |
| |
| ActivityWork work; |
| if (!read_work(code->mainWorkRead, &work)) { |
| return true; |
| } |
| switch (work.cmd) { |
| case CMD_DEF_KEY: { |
| KeyEvent* keyEvent; |
| while ((keyEvent=code->nativeInputQueue->getNextEvent()) != NULL) { |
| jobject inputEventObj = android_view_KeyEvent_fromNative( |
| code->env, keyEvent); |
| code->env->CallVoidMethod(code->clazz, |
| gNativeActivityClassInfo.dispatchUnhandledKeyEvent, inputEventObj); |
| int32_t res = code->nativeInputQueue->getConsumer().sendFinishedSignal(); |
| if (res != OK) { |
| LOGW("Failed to send finished signal on channel '%s'. status=%d", |
| code->nativeInputQueue->getConsumer().getChannel()->getName().string(), res); |
| } |
| } |
| } break; |
| case CMD_SET_WINDOW_FORMAT: { |
| code->env->CallVoidMethod(code->clazz, |
| gNativeActivityClassInfo.setWindowFormat, work.arg1); |
| } break; |
| case CMD_SET_WINDOW_FLAGS: { |
| code->env->CallVoidMethod(code->clazz, |
| gNativeActivityClassInfo.setWindowFlags, work.arg1, work.arg2); |
| } break; |
| default: |
| LOGW("Unknown work command: %d", work.cmd); |
| break; |
| } |
| |
| return true; |
| } |
| |
| // ------------------------------------------------------------------------ |
| |
| static jint |
| loadNativeCode_native(JNIEnv* env, jobject clazz, jstring path, jobject messageQueue, |
| jstring internalDataDir, jstring externalDataDir, int sdkVersion) |
| { |
| const char* pathStr = env->GetStringUTFChars(path, NULL); |
| NativeCode* code = NULL; |
| |
| void* handle = dlopen(pathStr, RTLD_LAZY); |
| |
| env->ReleaseStringUTFChars(path, pathStr); |
| |
| if (handle != NULL) { |
| code = new NativeCode(handle, (ANativeActivity_createFunc*) |
| dlsym(handle, "ANativeActivity_onCreate")); |
| if (code->createActivityFunc == NULL) { |
| LOGW("ANativeActivity_onCreate not found"); |
| delete code; |
| return 0; |
| } |
| |
| code->pollLoop = android_os_MessageQueue_getPollLoop(env, messageQueue); |
| if (code->pollLoop == NULL) { |
| LOGW("Unable to retrieve MessageQueue's PollLoop"); |
| delete code; |
| return 0; |
| } |
| |
| int msgpipe[2]; |
| if (pipe(msgpipe)) { |
| LOGW("could not create pipe: %s", strerror(errno)); |
| delete code; |
| return 0; |
| } |
| code->mainWorkRead = msgpipe[0]; |
| code->mainWorkWrite = msgpipe[1]; |
| code->pollLoop->setCallback(code->mainWorkRead, POLLIN, mainWorkCallback, code); |
| |
| code->ANativeActivity::callbacks = &code->callbacks; |
| if (env->GetJavaVM(&code->vm) < 0) { |
| LOGW("NativeActivity GetJavaVM failed"); |
| delete code; |
| return 0; |
| } |
| code->env = env; |
| code->clazz = env->NewGlobalRef(clazz); |
| |
| const char* dirStr = env->GetStringUTFChars(internalDataDir, NULL); |
| code->internalDataPath = dirStr; |
| code->internalDataPath = code->internalDataPath.string(); |
| env->ReleaseStringUTFChars(path, dirStr); |
| |
| dirStr = env->GetStringUTFChars(externalDataDir, NULL); |
| code->externalDataPath = dirStr; |
| code->externalDataPath = code->externalDataPath.string(); |
| env->ReleaseStringUTFChars(path, dirStr); |
| |
| code->sdkVersion = sdkVersion; |
| |
| code->createActivityFunc(code, NULL, 0); |
| } |
| |
| return (jint)code; |
| } |
| |
| static void |
| unloadNativeCode_native(JNIEnv* env, jobject clazz, jint handle) |
| { |
| if (handle != 0) { |
| NativeCode* code = (NativeCode*)handle; |
| delete code; |
| } |
| } |
| |
| static void |
| onStart_native(JNIEnv* env, jobject clazz, jint handle) |
| { |
| if (handle != 0) { |
| NativeCode* code = (NativeCode*)handle; |
| if (code->callbacks.onStart != NULL) { |
| code->callbacks.onStart(code); |
| } |
| } |
| } |
| |
| static void |
| onResume_native(JNIEnv* env, jobject clazz, jint handle) |
| { |
| if (handle != 0) { |
| NativeCode* code = (NativeCode*)handle; |
| if (code->callbacks.onResume != NULL) { |
| code->callbacks.onResume(code); |
| } |
| } |
| } |
| |
| static void |
| onSaveInstanceState_native(JNIEnv* env, jobject clazz, jint handle) |
| { |
| if (handle != 0) { |
| NativeCode* code = (NativeCode*)handle; |
| if (code->callbacks.onSaveInstanceState != NULL) { |
| size_t len = 0; |
| code->callbacks.onSaveInstanceState(code, &len); |
| } |
| } |
| } |
| |
| static void |
| onPause_native(JNIEnv* env, jobject clazz, jint handle) |
| { |
| if (handle != 0) { |
| NativeCode* code = (NativeCode*)handle; |
| if (code->callbacks.onPause != NULL) { |
| code->callbacks.onPause(code); |
| } |
| } |
| } |
| |
| static void |
| onStop_native(JNIEnv* env, jobject clazz, jint handle) |
| { |
| if (handle != 0) { |
| NativeCode* code = (NativeCode*)handle; |
| if (code->callbacks.onStop != NULL) { |
| code->callbacks.onStop(code); |
| } |
| } |
| } |
| |
| static void |
| onLowMemory_native(JNIEnv* env, jobject clazz, jint handle) |
| { |
| if (handle != 0) { |
| NativeCode* code = (NativeCode*)handle; |
| if (code->callbacks.onLowMemory != NULL) { |
| code->callbacks.onLowMemory(code); |
| } |
| } |
| } |
| |
| static void |
| onWindowFocusChanged_native(JNIEnv* env, jobject clazz, jint handle, jboolean focused) |
| { |
| if (handle != 0) { |
| NativeCode* code = (NativeCode*)handle; |
| if (code->callbacks.onWindowFocusChanged != NULL) { |
| code->callbacks.onWindowFocusChanged(code, focused ? 1 : 0); |
| } |
| } |
| } |
| |
| static void |
| onSurfaceCreated_native(JNIEnv* env, jobject clazz, jint handle, jobject surface) |
| { |
| if (handle != 0) { |
| NativeCode* code = (NativeCode*)handle; |
| code->setSurface(surface); |
| if (code->nativeWindow != NULL && code->callbacks.onNativeWindowCreated != NULL) { |
| code->callbacks.onNativeWindowCreated(code, |
| code->nativeWindow.get()); |
| } |
| } |
| } |
| |
| static void |
| onSurfaceChanged_native(JNIEnv* env, jobject clazz, jint handle, jobject surface, |
| jint format, jint width, jint height) |
| { |
| if (handle != 0) { |
| NativeCode* code = (NativeCode*)handle; |
| sp<ANativeWindow> oldNativeWindow = code->nativeWindow; |
| code->setSurface(surface); |
| if (oldNativeWindow != code->nativeWindow) { |
| if (oldNativeWindow != NULL && code->callbacks.onNativeWindowDestroyed != NULL) { |
| code->callbacks.onNativeWindowDestroyed(code, |
| oldNativeWindow.get()); |
| } |
| if (code->nativeWindow != NULL && code->callbacks.onNativeWindowCreated != NULL) { |
| code->callbacks.onNativeWindowCreated(code, |
| code->nativeWindow.get()); |
| } |
| } |
| } |
| } |
| |
| static void |
| onSurfaceDestroyed_native(JNIEnv* env, jobject clazz, jint handle, jobject surface) |
| { |
| if (handle != 0) { |
| NativeCode* code = (NativeCode*)handle; |
| if (code->nativeWindow != NULL && code->callbacks.onNativeWindowDestroyed != NULL) { |
| code->callbacks.onNativeWindowDestroyed(code, |
| code->nativeWindow.get()); |
| } |
| code->setSurface(NULL); |
| } |
| } |
| |
| static void |
| onInputChannelCreated_native(JNIEnv* env, jobject clazz, jint handle, jobject channel) |
| { |
| if (handle != 0) { |
| NativeCode* code = (NativeCode*)handle; |
| status_t err = code->setInputChannel(channel); |
| if (err != OK) { |
| jniThrowException(env, "java/lang/IllegalStateException", |
| "Error setting input channel"); |
| return; |
| } |
| if (code->callbacks.onInputQueueCreated != NULL) { |
| code->callbacks.onInputQueueCreated(code, |
| code->nativeInputQueue); |
| } |
| } |
| } |
| |
| static void |
| onInputChannelDestroyed_native(JNIEnv* env, jobject clazz, jint handle, jobject channel) |
| { |
| if (handle != 0) { |
| NativeCode* code = (NativeCode*)handle; |
| if (code->nativeInputQueue != NULL |
| && code->callbacks.onInputQueueDestroyed != NULL) { |
| code->callbacks.onInputQueueDestroyed(code, |
| code->nativeInputQueue); |
| } |
| code->setInputChannel(NULL); |
| } |
| } |
| |
| static const JNINativeMethod g_methods[] = { |
| { "loadNativeCode", "(Ljava/lang/String;Landroid/os/MessageQueue;Ljava/lang/String;Ljava/lang/String;I)I", |
| (void*)loadNativeCode_native }, |
| { "unloadNativeCode", "(I)V", (void*)unloadNativeCode_native }, |
| { "onStartNative", "(I)V", (void*)onStart_native }, |
| { "onResumeNative", "(I)V", (void*)onResume_native }, |
| { "onSaveInstanceStateNative", "(I)V", (void*)onSaveInstanceState_native }, |
| { "onPauseNative", "(I)V", (void*)onPause_native }, |
| { "onStopNative", "(I)V", (void*)onStop_native }, |
| { "onLowMemoryNative", "(I)V", (void*)onLowMemory_native }, |
| { "onWindowFocusChangedNative", "(IZ)V", (void*)onWindowFocusChanged_native }, |
| { "onSurfaceCreatedNative", "(ILandroid/view/Surface;)V", (void*)onSurfaceCreated_native }, |
| { "onSurfaceChangedNative", "(ILandroid/view/Surface;III)V", (void*)onSurfaceChanged_native }, |
| { "onSurfaceDestroyedNative", "(I)V", (void*)onSurfaceDestroyed_native }, |
| { "onInputChannelCreatedNative", "(ILandroid/view/InputChannel;)V", (void*)onInputChannelCreated_native }, |
| { "onInputChannelDestroyedNative", "(ILandroid/view/InputChannel;)V", (void*)onInputChannelDestroyed_native }, |
| }; |
| |
| static const char* const kNativeActivityPathName = "android/app/NativeActivity"; |
| |
| #define FIND_CLASS(var, className) \ |
| var = env->FindClass(className); \ |
| LOG_FATAL_IF(! var, "Unable to find class " className); \ |
| var = jclass(env->NewGlobalRef(var)); |
| |
| #define GET_METHOD_ID(var, clazz, methodName, fieldDescriptor) \ |
| var = env->GetMethodID(clazz, methodName, fieldDescriptor); \ |
| LOG_FATAL_IF(! var, "Unable to find method" methodName); |
| |
| int register_android_app_NativeActivity(JNIEnv* env) |
| { |
| //LOGD("register_android_app_NativeActivity"); |
| |
| FIND_CLASS(gNativeActivityClassInfo.clazz, kNativeActivityPathName); |
| |
| GET_METHOD_ID(gNativeActivityClassInfo.dispatchUnhandledKeyEvent, |
| gNativeActivityClassInfo.clazz, |
| "dispatchUnhandledKeyEvent", "(Landroid/view/KeyEvent;)V"); |
| |
| GET_METHOD_ID(gNativeActivityClassInfo.setWindowFlags, |
| gNativeActivityClassInfo.clazz, |
| "setWindowFlags", "(II)V"); |
| GET_METHOD_ID(gNativeActivityClassInfo.setWindowFormat, |
| gNativeActivityClassInfo.clazz, |
| "setWindowFormat", "(I)V"); |
| |
| return AndroidRuntime::registerNativeMethods( |
| env, kNativeActivityPathName, |
| g_methods, NELEM(g_methods)); |
| } |
| |
| } // namespace android |
