Hi list !
I'm having this problem:
In my application, I use a GLSurfaceView for 3D rendering. The real
rendering is done by calling native methods, coded in C++.
Once in a while (upon user clicks on 3D scene objects) the native
rendering engine should be able to call Java methods (through JNI)
that display a dialog box.
I can't get it to work, that's driving me crazy.
Here is the native method:
[CODE]
void MyCPlusPlusClass::showDialog(const std::string& pMsg)
{
jclass lClass = mJNIEnv->GetObjectClass(mActivity);
if (!lClass)
{
return false;
}
jmethodID lMethId = mJNIEnv->GetMethodID(lClass,
"showMessageDialog", "(Ljava/lang/String;)V");
if (!lMethId)
{
return false;
}
jstring lJavaString = mJNIEnv->NewStringUTF(pMessage.c_str());
mJNIEnv->CallVoidMethod(mActivity, lMethId, lJavaString);
}
[/CODE]
Then, the method showMessageDialog, coded in Java, in my activity:
[CODE]
public void showMessageDialog(String pMsg)
{
Log.i("Vg", "Create dialog with message " + pMsg);
Log.i("Vg", "Show dialog");
runOnUiThread(
new Runnable () {
public void run () {
AlertDialog.Builder lAlertBox = new
AlertDialog.Builder(this);
TextView lTextView = new TextView(MyActivity.this);
lTextView.setText(mMessage);
lAlertBox.setView(lTextView);
lAlertBox.setNeutralButton("Ok", MyActivity.this);
lAlertBox.setOnCancelListener(MyActivity.this);
lAlertBox.show();
}
}
);
}
[/CODE]
I thought this would work, but it doesn't. What am I doing wrong ?
Thanks
Florent.
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