1/* 2 * Copyright (C) 2015 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 17package com.android.tv.common.feature; 18 19import android.content.Context; 20import android.content.SharedPreferences; 21import android.util.Log; 22import com.android.tv.common.SharedPreferencesUtils; 23 24/** 25 * Feature controlled by shared preferences. 26 */ 27public final class SharedPreferencesFeature implements Feature { 28 private static final String TAG = "SharedPrefFeature"; 29 private static final boolean DEBUG = false; 30 31 private final String mKey; 32 private boolean mEnabled; 33 private final boolean mDefaultValue; 34 private SharedPreferences mSharedPreferences; 35 private final Feature mBaseFeature; 36 37 /** 38 * Create SharedPreferences controlled feature. 39 * 40 * @param key the SharedPreferences key. 41 * @param defaultValue the value to return if the property is undefined or empty. 42 * @param baseFeature if {@code baseFeature} is turned off, this feature is always disabled. 43 */ 44 public SharedPreferencesFeature(String key, boolean defaultValue, Feature baseFeature) { 45 mKey = key; 46 mDefaultValue = defaultValue; 47 mBaseFeature = baseFeature; 48 } 49 50 @Override 51 public boolean isEnabled(Context context) { 52 if (!mBaseFeature.isEnabled(context)) { 53 return false; 54 } 55 if (mSharedPreferences == null) { 56 mSharedPreferences = context.getSharedPreferences( 57 SharedPreferencesUtils.SHARED_PREF_FEATURES, Context.MODE_PRIVATE); 58 mEnabled = mSharedPreferences.getBoolean(mKey, mDefaultValue); 59 } 60 if (DEBUG) Log.d(TAG, mKey + " is " + mEnabled); 61 return mEnabled; 62 } 63 64 @Override 65 public String toString() { 66 return "SharedPreferencesFeature:key=" + mKey + ",value=" + mEnabled; 67 } 68 69 public void setEnabled(Context context, boolean enable) { 70 if (DEBUG) Log.d(TAG, mKey + " is set to " + enable); 71 if (mSharedPreferences == null) { 72 mSharedPreferences = context.getSharedPreferences( 73 SharedPreferencesUtils.SHARED_PREF_FEATURES, Context.MODE_PRIVATE); 74 mEnabled = enable; 75 mSharedPreferences.edit().putBoolean(mKey, enable).apply(); 76 } else if (mEnabled != enable) { 77 mEnabled = enable; 78 mSharedPreferences.edit().putBoolean(mKey, enable).apply(); 79 } 80 81 } 82} 83