ask for display over other apps permission in settings

app/src/main/java/org/schabi/newpipe/settings/VideoAudioSettingsFragment.java

@@ -1,12 +1,68 @@
 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 = new SharedPreferences.OnSharedPreferenceChangeListener() {
+            @Override
+            public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String s) {
+                if(s.equals(getString(R.string.minimize_on_exit_key))){
+                    String newSetting = sharedPreferences.getString(s,null);
+                    if(newSetting != null){
+                        if(newSetting.equals(getString(R.string.minimize_on_exit_popup_key))){
+                            if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && !Settings.canDrawOverlays(getContext())){
+                                Snackbar.make(getListView(),R.string.permission_display_over_apps,Snackbar.LENGTH_INDEFINITE)
+                                        .setAction(R.string.settings, new View.OnClickListener() {
+                                            @Override
+                                            public void onClick(View 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);
+    }
 }

app/src/main/res/values/strings.xml

@@ -227,6 +227,7 @@
     <string name="saved_tabs_invalid_json">Using default tabs, error while reading saved tabs</string>
     <string name="restore_defaults">Restore defaults</string>
     <string name="restore_defaults_confirmation">Do you want to restore the defaults?</string>
+    <string name="permission_display_over_apps">Give permission to display over other apps</string>
     <!-- error activity -->
     <string name="sorry_string">Sorry, that should not have happened.</string>
     <string name="guru_meditation" translatable="false">Guru Meditation.</string>