Question

I want global variables that with highest level in this app so that it doesn’t need to be initialize when activity starts every time. I test my application on my physical device, and get nullPointerException. But success in emulator!!
log information:

03-15 15:36:54.851: E/AndroidRuntime(21550): 
java.lang.RuntimeException: Unable to start activity ComponentInfo{panda.com.db/panda.com.db.IndexActivity}: java.lang.NullPointerException
03-15 15:36:54.851: E/AndroidRuntime(21550):
at panda.com.db.LittleRabitAssistants.<init>(LittleRabitAssistants.java:83)
03-15 15:36:54.851: E/AndroidRuntime(21550):
at panda.com.db.Global.Init(Global.java:23)
03-15 15:36:54.851: E/AndroidRuntime(21550):
at panda.com.db.IndexActivity.onCreate(IndexActivity.java:38)

Code of global class:

public class Global extends Application{
    private static LittleRabitAssistants assistants;
    ..
    ..
    public void Init(){
        this.assistantsDB = new DBAdapter(this,null,null);
        this.assistants = new LittleRabitAssistants(this);
        this.initLocaleFromDB();
    }
}

public LittleRabitAssistants(Global globalVariable){
        this.globalVariable=globalVariable;
            ..
        if(globalVariable.getLocaleLanguage().equals("zh-CN")){
            ..
        }else{
            ..
        }   
    }

public class IndexActivity extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.test);
        //get global application
        Global globalApplication = (Global)this.getApplication();
        //initialize the Assistants 
        globalApplication.Init();
        pa = globalApplication.getAsisstents();
}

However, the most important thing is, this application run successfully in emulator!!!

Answer 1

I think you have called the init() method before calling on the super.onCreate()…