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.car.settings.common; 18 19 import androidx.fragment.app.Fragment; 20 21 /** 22 * Implemented by Settings {@link android.app.Activity} instances to host Settings {@link Fragment} 23 * instances. 24 */ 25 public interface FragmentHost { 26 /** 27 * Launches a Fragment in the main container of the current Activity. 28 */ launchFragment(Fragment fragment)29 void launchFragment(Fragment fragment); 30 31 /** 32 * Pops the top off the Fragment stack. 33 */ goBack()34 void goBack(); 35 36 /** 37 * Shows a message to inform the user that the current feature is not available when driving. 38 */ showBlockingMessage()39 void showBlockingMessage(); 40 } 41