Custom global Application class breaks with "android.app.Application cannot be cast to"

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

Accepted Answer

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: ``` ```

Custom global Application class breaks with "android.app.Application cannot be cast to"

Solution

Problem