Question

I have a custom global class which looks like this

import android.app.Application;

public class MyApp extends Application {

    public String MainAct;

    public String getMainAct() {
        return MainAct;
    }

    public void setMainAct(String mainAct) {
        MainAct = mainAct;
    }
}

I want to preserve a string in this class via another Activity in its onCreate method.

    String local = "myLocalVariable";
    ((MyApp) getApplication()).setMainAct(local); //breaks here!!!
    String name = ((MyApp) getApplication()).getMainAct();

It breaks on the marked line with error: Caused by: java.lang.ClassCastException: android.app.Application cannot be cast to com.xxx.yyy.global.MyApp

I’ve checked the code for five times and I cannot find error anywhere. Can anyone tell me where the error is?!

Thanks

Answer 1

The error states that the type of the object returned by getApplication is android.app.Application. A possible cause for this is that you failed to define the application in the manifest. Make sure that your manifest includes something in the lines of:

<application android:name=".MyApp"...
</application>