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 package com.android.emergency.preferences; 17 18 import android.content.Context; 19 import android.os.UserManager; 20 import android.support.annotation.Nullable; 21 import android.text.TextUtils; 22 import android.util.AttributeSet; 23 import android.widget.ArrayAdapter; 24 25 import com.android.emergency.ReloadablePreferenceInterface; 26 import com.android.internal.annotations.VisibleForTesting; 27 28 /** 29 * {@link AutoCompleteEditTextPreference} that prepopulates the edit text view with the name of the 30 * user provided in settings. 31 */ 32 public class NameAutoCompletePreference extends AutoCompleteEditTextPreference implements 33 ReloadablePreferenceInterface { 34 private static final String[] EMPTY_STRING_ARRAY = new String[] {}; 35 36 private final SuggestionProvider mSuggestionProvider; 37 NameAutoCompletePreference(Context context, AttributeSet attrs)38 public NameAutoCompletePreference(Context context, AttributeSet attrs) { 39 this(context, attrs, new SuggestionProvider() { 40 private final UserManager mUserManager = 41 (UserManager) context.getSystemService(Context.USER_SERVICE); 42 43 @Override 44 public boolean hasNameToSuggest() { 45 return mUserManager.isUserNameSet(); 46 } 47 48 @Override 49 public String getNameSuggestion() { 50 if (!hasNameToSuggest()) { 51 return null; 52 } 53 return mUserManager.getUserName(); 54 } 55 }); 56 } 57 58 @VisibleForTesting NameAutoCompletePreference(Context context, AttributeSet attrs, SuggestionProvider suggestionProvider)59 public NameAutoCompletePreference(Context context, AttributeSet attrs, 60 SuggestionProvider suggestionProvider) { 61 super(context, attrs); 62 mSuggestionProvider = suggestionProvider; 63 getAutoCompleteTextView().setAdapter(createAdapter()); 64 } 65 66 @VisibleForTesting createAutocompleteSuggestions()67 public String[] createAutocompleteSuggestions() { 68 if (!mSuggestionProvider.hasNameToSuggest()) { 69 return EMPTY_STRING_ARRAY; 70 } 71 return new String[] {mSuggestionProvider.getNameSuggestion()}; 72 } 73 createAdapter()74 private ArrayAdapter createAdapter() { 75 UserManager userManager = 76 (UserManager) getContext().getSystemService(Context.USER_SERVICE); 77 String[] autocompleteSuggestions = createAutocompleteSuggestions(); 78 return new ArrayAdapter<String>(getContext(), 79 android.R.layout.simple_dropdown_item_1line, autocompleteSuggestions); 80 } 81 82 83 @Override reloadFromPreference()84 public void reloadFromPreference() { 85 setText(getPersistedString("")); 86 } 87 88 @Override isNotSet()89 public boolean isNotSet() { 90 return TextUtils.isEmpty(getText()); 91 } 92 93 @Override getSummary()94 public CharSequence getSummary() { 95 String text = getText(); 96 return TextUtils.isEmpty(text) ? super.getSummary() : text; 97 } 98 99 /** 100 * Interface for suggesting a name. 101 */ 102 public interface SuggestionProvider { 103 /** @return whether this class has a name to suggest. */ hasNameToSuggest()104 boolean hasNameToSuggest(); 105 106 /** 107 * Gets a suggested name. 108 * @return a suggest name, or {@code null} if there is no name to suggest. 109 */ 110 @Nullable getNameSuggestion()111 String getNameSuggestion(); 112 } 113 } 114