1 /* 2 * Copyright (C) 2019 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.tv.twopanelsettings; 18 19 import androidx.leanback.preference.LeanbackPreferenceFragmentCompat; 20 21 /** 22 * Child preference fragment should extend this class to make two panel settings functionality work, 23 * otherwise preview panel would not show up. 24 */ 25 public abstract class SettingsPreferenceFragmentBase extends LeanbackPreferenceFragmentCompat { 26 @Override onResume()27 public void onResume() { 28 super.onResume(); 29 if (getCallbackFragment() instanceof TwoPanelSettingsFragment) { 30 TwoPanelSettingsFragment parentFragment = 31 (TwoPanelSettingsFragment) getCallbackFragment(); 32 parentFragment.addListenerForFragment(this); 33 } 34 } 35 36 @Override onPause()37 public void onPause() { 38 super.onPause(); 39 if (getCallbackFragment() instanceof TwoPanelSettingsFragment) { 40 TwoPanelSettingsFragment parentFragment = 41 (TwoPanelSettingsFragment) getCallbackFragment(); 42 parentFragment.removeListenerForFragment(this); 43 } 44 } 45 } 46