1 /* 2 * Copyright (C) 2021 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.systemui.accessibility; 18 19 import android.content.Context; 20 import android.provider.Settings; 21 22 import androidx.annotation.MainThread; 23 import androidx.annotation.Nullable; 24 25 import com.android.systemui.dagger.SysUISingleton; 26 27 import javax.inject.Inject; 28 29 /** 30 * Controller for tracking the current accessibility button list. 31 * 32 * @see Settings.Secure#ACCESSIBILITY_BUTTON_TARGETS 33 */ 34 @MainThread 35 @SysUISingleton 36 public class AccessibilityButtonTargetsObserver extends 37 SecureSettingsContentObserver<AccessibilityButtonTargetsObserver.TargetsChangedListener> { 38 39 /** Listener for accessibility button targets changes. */ 40 public interface TargetsChangedListener { 41 42 /** 43 * Called when accessibility button targets changes. 44 * 45 * @param targets Current content of {@link Settings.Secure#ACCESSIBILITY_BUTTON_TARGETS} 46 */ onAccessibilityButtonTargetsChanged(String targets)47 void onAccessibilityButtonTargetsChanged(String targets); 48 } 49 50 @Inject AccessibilityButtonTargetsObserver(Context context)51 public AccessibilityButtonTargetsObserver(Context context) { 52 super(context, Settings.Secure.ACCESSIBILITY_BUTTON_TARGETS); 53 } 54 55 @Override onValueChanged(TargetsChangedListener listener, String value)56 void onValueChanged(TargetsChangedListener listener, String value) { 57 listener.onAccessibilityButtonTargetsChanged(value); 58 } 59 60 /** Returns the current string from settings key 61 * {@link Settings.Secure#ACCESSIBILITY_BUTTON_TARGETS}. */ 62 @Nullable getCurrentAccessibilityButtonTargets()63 public String getCurrentAccessibilityButtonTargets() { 64 return getSettingsValue(); 65 } 66 } 67