1 /* 2 * Copyright (C) 2017 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.settingslib.deviceinfo; 18 19 import android.content.Context; 20 import android.os.Build; 21 import android.support.annotation.VisibleForTesting; 22 import android.support.v7.preference.Preference; 23 import android.support.v7.preference.PreferenceScreen; 24 import android.text.TextUtils; 25 26 import com.android.settingslib.core.AbstractPreferenceController; 27 28 /** 29 * Preference controller for displaying device serial number. Wraps {@link Build#getSerial()}. 30 */ 31 public class AbstractSerialNumberPreferenceController extends AbstractPreferenceController { 32 33 @VisibleForTesting 34 static final String KEY_SERIAL_NUMBER = "serial_number"; 35 36 private final String mSerialNumber; 37 38 public AbstractSerialNumberPreferenceController(Context context) { 39 this(context, Build.getSerial()); 40 } 41 42 @VisibleForTesting 43 AbstractSerialNumberPreferenceController(Context context, String serialNumber) { 44 super(context); 45 mSerialNumber = serialNumber; 46 } 47 48 @Override 49 public boolean isAvailable() { 50 return !TextUtils.isEmpty(mSerialNumber); 51 } 52 53 @Override 54 public void displayPreference(PreferenceScreen screen) { 55 super.displayPreference(screen); 56 final Preference pref = screen.findPreference(KEY_SERIAL_NUMBER); 57 if (pref != null) { 58 pref.setSummary(mSerialNumber); 59 } 60 } 61 62 @Override 63 public String getPreferenceKey() { 64 return KEY_SERIAL_NUMBER; 65 } 66 } 67
