AIR native Android Extension - always returning null device id

Question

I am writing a native Android extension for a mobile AIR application. I am trying to get the device id, but the result always comes back as null. I can't figure out what I am doing wrong. Here is the native extension code (java):

import android.app.Activity;
import android.provider.Settings;
import android.provider.Settings.Secure;

import android.content.Context;
import android.content.SharedPreferences;
import android.telephony.TelephonyManager;

import com.adobe.fre.FREContext;
import com.adobe.fre.FREFunction;
import com.adobe.fre.FREObject;
import com.adobe.fre.FREWrongThreadException;

public class DeviceIdGetter extends Activity implements FREFunction {
    @Override
    public FREObject call(FREContext context, FREObject[] passedArgs) {
        FREObject result = null;

        TelephonyManager tManager = (TelephonyManager)getBaseContext().getSystemService(Context.TELEPHONY_SERVICE);

        try
        {
            result = FREObject.newObject(tManager.getDeviceId());
        }
        catch (FREWrongThreadException fwte)
        {
            try
            {
                result = FREObject.newObject("error");
            }
            catch (FREWrongThreadException fwte2)
            {
            }
            fwte.printStackTrace();
        }

        return result;
    }
}

Answer 1

Are you using sdk4.6?

The FREObject.newObject returns an error no implementation found for native freobject, this cause context get null. I think you have copied the FlashRuntimeExtensions.jar file from sdks folder to your java project.

Try to add Adobe Flash Builder 4.x\sdks\4.xx\lib\android\FlashRuntimeExtensions.jar into your jar path.