NewPipe-app-android/app/src/main/java/org/schabi/newpipe/settings/VideoAudioSettingsFragment.java

package org.schabi.newpipe.settings;

import android.content.SharedPreferences;
import android.os.Build;
import android.os.Bundle;
import android.provider.Settings;
import android.view.View;

import androidx.annotation.Nullable;

import com.google.android.material.snackbar.Snackbar;

import org.schabi.newpipe.R;
import org.schabi.newpipe.util.PermissionHelper;

public class VideoAudioSettingsFragment extends BasePreferenceFragment {

    private SharedPreferences.OnSharedPreferenceChangeListener listener;

    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        listener = (sharedPreferences, s) -> {

            // on M and above, if user chooses to minimise to popup player on exit and the app doesn't have
            // display over other apps permission, show a snackbar to let the user give permission
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M &&
                    s.equals(getString(R.string.minimize_on_exit_key))) {

                String newSetting = sharedPreferences.getString(s, null);
                if (newSetting != null
                        && newSetting.equals(getString(R.string.minimize_on_exit_popup_key))
                        && !Settings.canDrawOverlays(getContext())) {

                    Snackbar.make(getListView(), R.string.permission_display_over_apps, Snackbar.LENGTH_INDEFINITE)
                            .setAction(R.string.settings,
                                    view -> PermissionHelper.checkSystemAlertWindowPermission(getContext()))
                            .show();

                }
            }
        };
    }


    @Override
    public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
        addPreferencesFromResource(R.xml.video_audio_settings);
    }

    @Override
    public void onResume() {
        super.onResume();
        getPreferenceManager().getSharedPreferences().registerOnSharedPreferenceChangeListener(listener);

    }

    @Override
    public void onPause() {
        super.onPause();
        getPreferenceManager().getSharedPreferences().unregisterOnSharedPreferenceChangeListener(listener);
    }
}