1 /* 2 * Copyright (C) 2022 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.widget; 18 19 import android.content.Context; 20 import android.os.Build; 21 import android.view.LayoutInflater; 22 import android.view.View; 23 import android.view.ViewGroup; 24 import android.widget.ArrayAdapter; 25 26 /** 27 * An ArrayAdapter which was used by Spinner with settings style. 28 * @param <T> the data type to be loaded. 29 */ 30 public class SettingsSpinnerAdapter<T> extends ArrayAdapter<T> { 31 32 private static final int DEFAULT_RESOURCE = R.layout.settings_spinner_view; 33 private static final int DFAULT_DROPDOWN_RESOURCE = R.layout.settings_spinner_dropdown_view; 34 private final LayoutInflater mDefaultInflater; 35 36 /** 37 * Constructs a new SettingsSpinnerAdapter with the given context. 38 * And it customizes title bar with a settings style. 39 * 40 * @param context The Context the view is running in, through which it can 41 * access the current theme, resources, etc. 42 */ SettingsSpinnerAdapter(Context context)43 public SettingsSpinnerAdapter(Context context) { 44 super(context, getDefaultResource()); 45 46 setDropDownViewResource(getDropdownResource()); 47 mDefaultInflater = LayoutInflater.from(context); 48 } 49 50 /** 51 * In overridded {@link #getView(int, View, ViewGroup)}, use this method to get default view. 52 */ getDefaultView(int position, View convertView, ViewGroup parent)53 public View getDefaultView(int position, View convertView, ViewGroup parent) { 54 return mDefaultInflater.inflate(getDefaultResource(), parent, false /* attachToRoot */); 55 } 56 57 /** 58 * In overridded {@link #getDropDownView(int, View, ViewGroup)}, use this method to get default 59 * drop down view. 60 */ getDefaultDropDownView(int position, View convertView, ViewGroup parent)61 public View getDefaultDropDownView(int position, View convertView, ViewGroup parent) { 62 return mDefaultInflater.inflate(getDropdownResource(), parent, false /* attachToRoot */); 63 } 64 getDefaultResource()65 private static int getDefaultResource() { 66 return (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) 67 ? DEFAULT_RESOURCE : android.R.layout.simple_spinner_dropdown_item; 68 } getDropdownResource()69 private static int getDropdownResource() { 70 return (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) 71 ? DFAULT_DROPDOWN_RESOURCE : android.R.layout.simple_spinner_dropdown_item; 72 } 73 } 74