Convert Intents to arg list, returning argc and argv Note that this C routine mallocs memory that the caller must free
| 30 | // Convert Intents to arg list, returning argc and argv |
| 31 | // Note that this C routine mallocs memory that the caller must free |
| 32 | char **get_args(struct android_app *app, const char *intent_extra_data_key, const char *appTag, int *count) { |
| 33 | std::vector<std::string> args; |
| 34 | JavaVM &vm = *app->activity->vm; |
| 35 | JNIEnv *p_env; |
| 36 | if (vm.AttachCurrentThread(&p_env, nullptr) != JNI_OK) return nullptr; |
| 37 | |
| 38 | JNIEnv &env = *p_env; |
| 39 | jobject activity = app->activity->clazz; |
| 40 | jmethodID get_intent_method = env.GetMethodID(env.GetObjectClass(activity), "getIntent", "()Landroid/content/Intent;"); |
| 41 | jobject intent = env.CallObjectMethod(activity, get_intent_method); |
| 42 | jmethodID get_string_extra_method = |
| 43 | env.GetMethodID(env.GetObjectClass(intent), "getStringExtra", "(Ljava/lang/String;)Ljava/lang/String;"); |
| 44 | jvalue get_string_extra_args; |
| 45 | get_string_extra_args.l = env.NewStringUTF(intent_extra_data_key); |
| 46 | jstring extra_str = static_cast<jstring>(env.CallObjectMethodA(intent, get_string_extra_method, &get_string_extra_args)); |
| 47 | |
| 48 | std::string args_str; |
| 49 | if (extra_str) { |
| 50 | const char *extra_utf = env.GetStringUTFChars(extra_str, nullptr); |
| 51 | args_str = extra_utf; |
| 52 | env.ReleaseStringUTFChars(extra_str, extra_utf); |
| 53 | env.DeleteLocalRef(extra_str); |
| 54 | } |
| 55 | |
| 56 | env.DeleteLocalRef(get_string_extra_args.l); |
| 57 | env.DeleteLocalRef(intent); |
| 58 | vm.DetachCurrentThread(); |
| 59 | |
| 60 | // split args_str |
| 61 | std::stringstream ss(args_str); |
| 62 | std::string arg; |
| 63 | while (std::getline(ss, arg, ' ')) { |
| 64 | if (!arg.empty()) args.push_back(arg); |
| 65 | } |
| 66 | |
| 67 | // Convert our STL results to C friendly constructs |
| 68 | assert(count != nullptr); |
| 69 | *count = args.size() + 1; |
| 70 | char **vector = (char **)malloc(*count * sizeof(char *)); |
| 71 | const char *appName = appTag ? appTag : (const char *)"appTag"; |
| 72 | |
| 73 | vector[0] = (char *)malloc(strlen(appName) * sizeof(char)); |
| 74 | strcpy(vector[0], appName); |
| 75 | |
| 76 | for (uint32_t i = 0; i < args.size(); i++) { |
| 77 | vector[i + 1] = (char *)malloc(strlen(args[i].c_str()) * sizeof(char)); |
| 78 | strcpy(vector[i + 1], args[i].c_str()); |
| 79 | } |
| 80 | |
| 81 | return vector; |
| 82 | } |
| 83 | |
| 84 | } // extern "C" |