java.lang.ClassCastException: android.app.Application cannot be cast to androidx.appcompat.app.AppCompatActivity

问题

I have a problem regarding adapter in fragment. It throws a typo shown below.

java.lang.ClassCastException: android.app.Application cannot be cast to androidx.appcompat.app.AppCompatActivity

Here is the code snippet.

SongDetailFragment fragment =
                        SongDetailFragment.newInstance(selectedSong);
                AppCompatActivity activity = (AppCompatActivity) view.getContext().getApplicationContext();
                activity.getSupportFragmentManager().beginTransaction()
                        .replace(R.id.song_detail_container, fragment)
                        .addToBackStack(null)
                        .commit();

How can I fix it?

回答1:

In your Fragment use:

AppCompatActivity activity = (AppCompatActivity) getActivity();

instead of:

AppCompatActivity activity = (AppCompatActivity) view.getContext().getApplicationContext();

来源：https://stackoverflow.com/questions/57962537/java-lang-classcastexception-android-app-application-cannot-be-cast-to-androidx