1 /* 2 * Copyright 2025 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.settings.inputmethod; 18 19 import android.hardware.input.InputManager; 20 import android.os.Bundle; 21 22 import androidx.annotation.NonNull; 23 24 import com.android.internal.util.Preconditions; 25 import com.android.settings.dashboard.DashboardFragment; 26 27 public abstract class InputDeviceDashboardFragment extends DashboardFragment 28 implements InputManager.InputDeviceListener { 29 private InputManager mInputManager; 30 31 @Override onCreate(@onNull Bundle icicle)32 public void onCreate(@NonNull Bundle icicle) { 33 super.onCreate(icicle); 34 mInputManager = Preconditions.checkNotNull(getActivity() 35 .getSystemService(InputManager.class)); 36 } 37 38 @Override onResume()39 public void onResume() { 40 super.onResume(); 41 finishEarlyIfNeeded(); 42 mInputManager.registerInputDeviceListener(this /* listener */, null /* handler */); 43 } 44 45 @Override onPause()46 public void onPause() { 47 super.onPause(); 48 mInputManager.unregisterInputDeviceListener(this /* listener */); 49 } 50 51 @Override onInputDeviceAdded(int deviceId)52 public void onInputDeviceAdded(int deviceId) { 53 finishEarlyIfNeeded(); 54 } 55 56 @Override onInputDeviceRemoved(int deviceId)57 public void onInputDeviceRemoved(int deviceId) { 58 finishEarlyIfNeeded(); 59 } 60 61 @Override onInputDeviceChanged(int deviceId)62 public void onInputDeviceChanged(int deviceId) { 63 finishEarlyIfNeeded(); 64 } 65 finishEarlyIfNeeded()66 private void finishEarlyIfNeeded() { 67 if (getActivity() == null) { 68 return; 69 } 70 if (needToFinishEarly()) { 71 getActivity().finish(); 72 } 73 } 74 75 /** 76 * Returns whether the fragment should still be displayed given the input devices that are 77 * currently connected. 78 */ needToFinishEarly()79 protected abstract boolean needToFinishEarly(); 80 isTouchpadDetached()81 protected static boolean isTouchpadDetached() { 82 return !InputPeripheralsSettingsUtils.isTouchpad(); 83 } 84 isMouseDetached()85 protected static boolean isMouseDetached() { 86 return !InputPeripheralsSettingsUtils.isMouse(); 87 } 88 isHardKeyboardDetached()89 protected static boolean isHardKeyboardDetached() { 90 return !InputPeripheralsSettingsUtils.isHardKeyboard(); 91 } 92 } 93