1 /* 2 * Copyright (C) 2016 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.settings.deviceinfo; 18 19 import android.content.Context; 20 import android.os.Build; 21 import android.support.v7.preference.Preference; 22 import android.support.v7.preference.PreferenceScreen; 23 import android.text.TextUtils; 24 25 import com.android.internal.annotations.VisibleForTesting; 26 import com.android.settings.core.PreferenceController; 27 28 public class SerialNumberPreferenceController extends PreferenceController { 29 30 private static final String KEY_SERIAL_NUMBER = "serial_number"; 31 32 private final String mSerialNumber; 33 SerialNumberPreferenceController(Context context)34 public SerialNumberPreferenceController(Context context) { 35 this(context, Build.getSerial()); 36 } 37 38 @VisibleForTesting SerialNumberPreferenceController(Context context, String serialNumber)39 SerialNumberPreferenceController(Context context, String serialNumber) { 40 super(context); 41 mSerialNumber = serialNumber; 42 } 43 44 @Override isAvailable()45 public boolean isAvailable() { 46 return !TextUtils.isEmpty(mSerialNumber); 47 } 48 49 @Override displayPreference(PreferenceScreen screen)50 public void displayPreference(PreferenceScreen screen) { 51 super.displayPreference(screen); 52 final Preference pref = screen.findPreference(KEY_SERIAL_NUMBER); 53 if (pref != null) { 54 pref.setSummary(mSerialNumber); 55 } 56 } 57 58 @Override getPreferenceKey()59 public String getPreferenceKey() { 60 return KEY_SERIAL_NUMBER; 61 } 62 } 63