解析数据库初始化 - 导航回 MainActivity 时应用程序崩溃

Question

When my project starts up it's fine. MainActivity starts and then it navigates to another page but when I navigate back to MainActivity I sometimes get this error. http://imgur.com/FVhWMHn I'm positive this is from calling Parse.enableLocalDatastore before Parse.initialize but here is my code for mainActivity

    Parse.enableLocalDatastore(this);

    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    Parse.initialize(this, "MY_INFO", "MY_INFO_AGAIN");

    // check if a user is not cached
    ParseUser currentUser = ParseUser.getCurrentUser();
    if (currentUser == null)
    {
        // prompt user to LoginOrSignUp screen
        Intent intent = new Intent(MainActivity.this, LoginOrSignUpActivity.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);
        startActivity(intent);
    }`

local data store is called before initialize but it still crashes. I don't get it. I can communicate with my data base just fine and everything but as soon as I navigate back to main it crashes

Answer 1

you should initialize your Parse SDK in separate class as follows

public class SampleApplication extends Application {
   public void onCreate(){
       super.onCreate();
       Parse.enableLocalDatastore(getApplicationContext());
       Parse.initialize(this, "PARSE_APP_KEY", "PARSE_CLIENT_KEY");
        ParseInstallation.getCurrentInstallation().saveInBackground();
   }
}

IMPORTANT!!! you need to put this class info in your AndroidManifest.xml file. hope it helps!