unrealdragon/WaterLevelSensor
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v0.0.9

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TheUnrealDragon 2026-04-16 17:18:02 +05:30
commit 69086d8093
1 changed files with 370 additions and 134 deletions
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151
service.cpp
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@ -11,7 +11,6 @@
Q_DECLARE_JNI_CLASS(ComponentName, "android/content/ComponentName")
Q_DECLARE_JNI_CLASS(WaterLevelService, "org/qtproject/example/appwaterLevelSensor/WaterLevelService")
static volatile float level = -1;
static void handleWaterLevelUpdate(JNIEnv *env, jobject /*obj*/, jbyteArray data) {
@ -29,87 +28,95 @@ static void handleWaterLevelUpdate(JNIEnv *env, jobject /*obj*/, jbyteArray data
env->ReleaseByteArrayElements(data, bytes, JNI_ABORT);
}
extern "C" JNIEXPORT jint JNI_OnLoad(JavaVM* vm, void* reserved) {
JNIEnv* env;
if (vm->GetEnv(reinterpret_cast<void**>(&env), JNI_VERSION_1_6) != JNI_OK) {
return JNI_ERR;
}
// Register your native method ONCE when the library loads
jclass javaClass = env->FindClass("org/qtproject/example/appwaterLevelSensor/WaterLevelReceiver");
if (javaClass) {
static JNINativeMethod methods[] = {
{"updateWaterLevel", "([B)V", (void *)handleWaterLevelUpdate}
};
env->RegisterNatives(javaClass, methods, 1);
}
return JNI_VERSION_1_6;
}
service::service(QObject *parent)
: QObject{parent}
{
if(QSysInfo::productType() == "android") {
qDebug() << "Running android service";
// QJniEnvironment env;
// // if (env->ExceptionCheck()) env->ExceptionClear();
// // static bool nativesRegistered = false;
using namespace QtJniTypes;
using namespace QNativeInterface;
// // if(!nativesRegistered) {
// // // jclass javaClass = env.findClass("org/qtproject/example/appwaterLevelSensor/WaterLevelReceiver");
// // // if (javaClass) {
// // // JNINativeMethod methods[] = {{"updateWaterLevel", "([B)V", (void *)handleWaterLevelUpdate}};
// // // if (env->RegisterNatives(javaClass, methods, 1) < 0) {
// // // qDebug() << "RegisterNatives failed!";
// // // } else {
// // // nativesRegistered = true;
// // // }
// // // } else {
// // // qDebug() << "Could not find WaterLevelReceiver class";
// // // }
// // // if (env->ExceptionCheck()) env->ExceptionClear();
// // }
// using namespace QtJniTypes;
// using namespace QNativeInterface;
JNINativeMethod methods[] = {
{"updateWaterLevel", "([B)V", (void *)handleWaterLevelUpdate}
};
// auto *androidApp = qGuiApp->nativeInterface<QAndroidApplication>();
// Context context = androidApp->context();
QJniObject context = QNativeInterface::QAndroidApplication::context();
QJniEnvironment env;
auto serviceClass = env.findClass(Traits<WaterLevelService>::className());
if (!serviceClass) {
qDebug() << "FAILED to find WaterLevelService class!";
env->ExceptionDescribe(); // VERY important
env->ExceptionClear();
return;
}
jclass javaClass = env.findClass("org/qtproject/example/appwaterLevelSensor/WaterLevelReceiver");
env->RegisterNatives(javaClass, methods, 1);
QJniObject::callStaticMethod<void>(
"org/qtproject/example/appwaterLevelSensor/WaterLevelServiceStarter",
"startService",
"(Landroid/content/Context;)V",
context.object<jobject>()); // pass the QtActivity instance );
// QJniObject activity = QNativeInterface::QAndroidApplication::context();
// activity.callMethod<void>("startWaterLevelService", "()V");
// Intent serviceIntent(activity, serviceClass);
// activity.callMethod<WaterLevelService>("startWaterLevelService");
// activity.callMethod<()
// QJniObject::callStaticMethod<void>(
// "org/qtproject/example/appwaterLevelSensor/WaterLevelService",
// "startQtAndroidService",
// "(Landroid/content/Context;)V",
// activity.object<jobject>()
// );
// activity.callMethod<void>("startWaterLevelService", "()V"); // Intent serviceIntent(context, serviceClass);
// context.callMethod<ComponentName>("startService", serviceIntent);
// context.callMethod<ComponentName>(
// "startForegroundService",
// serviceIntent
// );
// QJniObject className = QJniObject::fromString(
// "org.qtproject.example.appwaterLevelSensor.WaterLevelService"
// );
// QJniObject serviceClassObj = QJniObject::callStaticObjectMethod(
// "java/lang/Class",
// "forName",
// "(Ljava/lang/String;)Ljava/lang/Class;",
// className.object<jstring>()
// );
// QJniObject intent(
// "android/content/Intent",
// "(Landroid/content/Context;Ljava/lang/Class;)V",
// context.object(),
// serviceClassObj.object()
// );
// context.callObjectMethod(
// "startForegroundService",
// "(Landroid/content/Intent;)Landroid/content/ComponentName;",
// intent.object()
// ); // WaterLevelService::callStaticMethod<void>("startQtAndroidService", context);
// // Context context = androidApp->context();
// QJniObject context = QNativeInterface::QAndroidApplication::context();
// auto serviceClass = env.findClass(Traits<WaterLevelService>::className());
// if (!serviceClass) {
// qDebug() << "FAILED to find WaterLevelService class!";
// env->ExceptionDescribe(); // VERY important
// env->ExceptionClear();
// return;
// }
// if (context.isValid()) {
// QJniObject::callStaticMethod<
// void>(
// "org/qtproject/example/appwaterLevelSensor/WaterLevelServiceStarter",
// "startService",
// "(Landroid/content/Context;)V",
// context.object<jobject>());
// }
}
}
void service::moveAppToBackground()
{
QJniObject activity = QNativeInterface::QAndroidApplication::context();
if (activity.isValid()) {
qDebug() << "Moved app to background";
activity.callMethod<jboolean>("moveTaskToBack", "(Z)Z", true);
}
qDebug() << "Closing";
}
void service::begin() {
// Only call this once the UI is visible
QJniObject context = QNativeInterface::QAndroidApplication::context();
QJniObject::callStaticMethod<void>(
"org/qtproject/example/appwaterLevelSensor/WaterLevelServiceStarter",
"startService",
"(Landroid/content/Context;)V",
context.object<jobject>()
);
}