| /* |
| * Copyright (C) 2021 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.systemui.accessibility; |
| |
| import android.content.Context; |
| import android.provider.Settings; |
| |
| import androidx.annotation.MainThread; |
| import androidx.annotation.Nullable; |
| |
| import com.android.systemui.dagger.SysUISingleton; |
| |
| import javax.inject.Inject; |
| |
| /** |
| * Controller for tracking the current accessibility button list. |
| * |
| * @see Settings.Secure#ACCESSIBILITY_BUTTON_TARGETS |
| */ |
| @MainThread |
| @SysUISingleton |
| public class AccessibilityButtonTargetsObserver extends |
| SecureSettingsContentObserver<AccessibilityButtonTargetsObserver.TargetsChangedListener> { |
| |
| /** Listener for accessibility button targets changes. */ |
| public interface TargetsChangedListener { |
| |
| /** |
| * Called when accessibility button targets changes. |
| * |
| * @param targets Current content of {@link Settings.Secure#ACCESSIBILITY_BUTTON_TARGETS} |
| */ |
| void onAccessibilityButtonTargetsChanged(String targets); |
| } |
| |
| @Inject |
| public AccessibilityButtonTargetsObserver(Context context) { |
| super(context, Settings.Secure.ACCESSIBILITY_BUTTON_TARGETS); |
| } |
| |
| @Override |
| void onValueChanged(TargetsChangedListener listener, String value) { |
| listener.onAccessibilityButtonTargetsChanged(value); |
| } |
| |
| /** Returns the current string from settings key |
| * {@link Settings.Secure#ACCESSIBILITY_BUTTON_TARGETS}. */ |
| @Nullable |
| public String getCurrentAccessibilityButtonTargets() { |
| return getSettingsValue(); |
| } |
| } |