Load external JAR library and FindClass

fpelliccioni

Hi,

I am trying to load an external JAR (java code) library into my Android App.

I am following the following steps:

I put the .jar file into android/libs directory.

When I run in debug mode I could check that the JAR is copied into:
build-myProjectName-Platform-Debug/android-build/libs
I put this in the AndroidManifest.xml

<meta-data android:name="android.app.load_local_jars" android:value="jar/QtAndroid.jar:jar/QtAndroidAccessibility.jar:jar/QtAndroid-bundled.jar:jar/QtAndroidAccessibility-bundled.jar:jar/myjar.jar"/>
```
 Note: The "jar/QtAndroid.jar:jar/QtAndroidAccessibility.jar:jar/QtAndroid-bundled.jar:jar/QtAndroidAccessibility-bundled.jar" part was copied from the original AndroidManifest.xml created by the QtCreator.
```
I have the following code:
@
void test() // called from main function
{
QAndroidJniEnvironment jniEnv;
JNIEnv* jni = jniEnv;
jclass j_info_class = jni->FindClass("xxx/yyy/zzz/MyClass");
```
 if ( j_info_class ) {
     qDebug() << "j_info_class is valid";
 } else {
     qDebug() << "j_info_class is invalid";
 }
```
}
@

The value of j_info_class is nullptr, printing "j_info_class is invalid".

I can not find documentation with clear steps on how to do this.
What I was doing was adding things I've found in different forums.

What am I doing wrong?

Thanks and regards,
Fernando.

[edit: added missing coding tags @ SGaist]

fpelliccioni

Note:

Using the following code, the Java class was found.

@
if (QAndroidJniObject::isClassAvailable("xxx/yyy/zzz/MyClass")) {
qDebug() << "Available";
}
@

Prints "Available"

That is, the configuration seems to be OK. That means that the problem seems to be in QAndroidJniEnvironment::FindClass.

I need to use FindClass because I am using a shared library (I can not modify the code) that uses JNI that way.

Regards,
Fernando.

[Thanks SGaist por the correction]

fpelliccioni

I submitted the following bug: