Android - Parse error when initializing activity

Question

When running the activity the first time, Parte initialization (which is inside the onCreate method) goes well:

Parse.enableLocalDatastore(this); 
Parse.initialize(this, "...", "...");

Then, If I press the back button and enter again in the activity, I get an error:

java.lang.IllegalStateException: `Parse#enableLocalDatastore(Context)` must be invoked before `Parse#initialize(Context)`

Which I do not really understand why, because the Parse.enableLocalDatastore(this); is before Parse.initialize(this, "...", "...");.

Well, Ok. Then I tried to retrieve when the enableLocalDatastore has finihed, with Parse.isInitialized() method, but it is private, so I can't use it (as well as some others Parse variables I could use).

After some time, I found that If I call both methods inside a new Thread it works.

I'd like to know why the error happens and why It was solved with the Thread. Also, is there any better way to do it?

Follows the code (trimmed for the important parts):

public class RegisterActivity extends Activity {

Button linkParse;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_register);

    linkParse = (Button)findViewById(R.id.linkparse);
    linkParse.setOnClickListener(new LinkParse());
    linkParse.setClickable(false);

    try {
        // Enable Local Datastore.
        Parse.enableLocalDatastore(this);
        Parse.initialize(this, "...", "...");          
    } catch(Exception e){
        Toast.makeText(RegisterActivity.this, "Parse not started.", Toast.LENGTH_SHORT).show();
        linkParse.setClickable(true);
    }

}

class LinkParse implements View.OnClickListener{
    @Override
    public void onClick(View v) {
        Thread thread = new Thread(new StartParse());
        thread.start();
    }
}

class StartParse implements Runnable{
    @Override
    public void run() {
        try {
            // Enable Local Datastore.
            Parse.enableLocalDatastore(RegisterActivity.this);
            Parse.initialize(RegisterActivity.this, "...", "...");
        } catch(Exception e){

        }
    }
}
}

Both methods should be called in a class extending Application. devahead.com/blog/2011/06/… — cYrixmorten
– cYrixmorten, Commented Jun 21, 2015 at 22:04

Edwin · Accepted Answer · 2015-06-22 01:25:12Z

2

You should invoke these two lines of codes from the application class not from the activity

Parse.initialize(this, "....","....");
Parse.enableLocalDatatore(this);

There is no need to initialized this multiple times and global application state is meant to be in the application class.

Create a class and extend application and initialize your parse code there

public class MyApplication extends Application{
    @Override
    public void onCreate(){
        super.onCreate()
        Parse.initialize(this, "....", "....");
        Parse.enableLocalDatastore(this)
    }
}

After you have created the application class. Add it to your AndroidManifest.xml

<application android:icon="@drawable/icon"
android:label="@stringapp_name"
android:name="MyApplication">

answered Jun 22, 2015 at 1:25

Edwin

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