| /* |
| * Copyright 2019 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.car.settings.applications; |
| |
| import android.content.Context; |
| import android.content.SharedPreferences; |
| import android.os.Bundle; |
| |
| import com.android.car.settings.common.SettingsFragment; |
| |
| /** |
| * Fragment base class for use in cases where a list of applications is displayed. Includes a |
| * a shared preference instance that can be used to show/hide system apps in the list. |
| */ |
| public abstract class AppListFragment extends SettingsFragment { |
| |
| protected static final String SHARED_PREFERENCE_PATH = |
| "com.android.car.settings.applications.AppListFragment"; |
| protected static final String KEY_HIDE_SYSTEM = |
| "com.android.car.settings.applications.HIDE_SYSTEM"; |
| |
| private boolean mHideSystem = true; |
| |
| private SharedPreferences mSharedPreferences; |
| private SharedPreferences.OnSharedPreferenceChangeListener mSharedPreferenceChangeListener = |
| (sharedPreferences, key) -> { |
| if (KEY_HIDE_SYSTEM.equals(key)) { |
| mHideSystem = sharedPreferences.getBoolean(KEY_HIDE_SYSTEM, |
| /* defaultValue= */ true); |
| onToggleShowSystemApps(!mHideSystem); |
| } |
| }; |
| |
| @Override |
| public void onCreate(Bundle savedInstanceState) { |
| super.onCreate(savedInstanceState); |
| mSharedPreferences = |
| getContext().getSharedPreferences(SHARED_PREFERENCE_PATH, Context.MODE_PRIVATE); |
| if (savedInstanceState != null) { |
| mHideSystem = savedInstanceState.getBoolean(KEY_HIDE_SYSTEM, |
| /* defaultValue= */ true); |
| mSharedPreferences.edit().putBoolean(KEY_HIDE_SYSTEM, mHideSystem).apply(); |
| } else { |
| mSharedPreferences.edit().putBoolean(KEY_HIDE_SYSTEM, true).apply(); |
| } |
| } |
| |
| @Override |
| public void onStart() { |
| super.onStart(); |
| onToggleShowSystemApps(!mHideSystem); |
| mSharedPreferences.registerOnSharedPreferenceChangeListener( |
| mSharedPreferenceChangeListener); |
| } |
| |
| @Override |
| public void onStop() { |
| super.onStop(); |
| mSharedPreferences.unregisterOnSharedPreferenceChangeListener( |
| mSharedPreferenceChangeListener); |
| } |
| |
| /** Called when a user toggles the option to show system applications in the list. */ |
| protected abstract void onToggleShowSystemApps(boolean showSystem); |
| |
| /** Returns {@code true} if system applications should be shown in the list. */ |
| protected final boolean shouldShowSystemApps() { |
| return !mHideSystem; |
| } |
| |
| @Override |
| public void onSaveInstanceState(Bundle outState) { |
| super.onSaveInstanceState(outState); |
| outState.putBoolean(KEY_HIDE_SYSTEM, mHideSystem); |
| } |
| } |