1 /* 2 * Copyright (C) 2013 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; 18 19 import android.app.Activity; 20 import android.app.AlertDialog.Builder; 21 import android.content.Context; 22 import android.content.pm.ApplicationInfo; 23 import android.content.pm.PackageManager; 24 import android.content.pm.PackageManager.NameNotFoundException; 25 import android.graphics.drawable.Drawable; 26 import android.preference.ListPreference; 27 import android.util.AttributeSet; 28 import android.view.LayoutInflater; 29 import android.view.View; 30 import android.view.ViewGroup; 31 import android.widget.ArrayAdapter; 32 import android.widget.CheckedTextView; 33 import android.widget.ImageView; 34 import android.widget.ListAdapter; 35 36 /** 37 * Extends ListPreference to allow us to show the icons for a given list of applications. We do this 38 * because the names of applications are very similar and the user may not be able to determine what 39 * app they are selecting without an icon. 40 */ 41 public class AppListPreference extends ListPreference { 42 private Drawable[] mEntryDrawables; 43 44 public class AppArrayAdapter extends ArrayAdapter<CharSequence> { 45 private Drawable[] mImageDrawables = null; 46 private int mSelectedIndex = 0; 47 48 public AppArrayAdapter(Context context, int textViewResourceId, 49 CharSequence[] objects, Drawable[] imageDrawables, int selectedIndex) { 50 super(context, textViewResourceId, objects); 51 mSelectedIndex = selectedIndex; 52 mImageDrawables = imageDrawables; 53 } 54 55 @Override 56 public View getView(int position, View convertView, ViewGroup parent) { 57 LayoutInflater inflater = ((Activity)getContext()).getLayoutInflater(); 58 View view = inflater.inflate(R.layout.app_preference_item, parent, false); 59 CheckedTextView checkedTextView = (CheckedTextView)view.findViewById(R.id.app_label); 60 checkedTextView.setText(getItem(position)); 61 if (position == mSelectedIndex) { 62 checkedTextView.setChecked(true); 63 } 64 ImageView imageView = (ImageView)view.findViewById(R.id.app_image); 65 imageView.setImageDrawable(mImageDrawables[position]); 66 return view; 67 } 68 } 69 70 public AppListPreference(Context context, AttributeSet attrs, 71 int defStyleAttr, int defStyleRes) { 72 super(context, attrs, defStyleAttr, defStyleRes); 73 } 74 75 public AppListPreference(Context context, AttributeSet attrs) { 76 super(context, attrs); 77 } 78 79 public void setPackageNames(String[] packageNames, String defaultPackageName) { 80 // Look up all package names in PackageManager. Skip ones we can't find. 81 int foundPackages = 0; 82 PackageManager pm = getContext().getPackageManager(); 83 ApplicationInfo[] appInfos = new ApplicationInfo[packageNames.length]; 84 for (int i = 0; i < packageNames.length; i++) { 85 try { 86 appInfos[i] = pm.getApplicationInfo(packageNames[i], 0); 87 foundPackages++; 88 } catch (NameNotFoundException e) { 89 // Leave appInfos[i] uninitialized; it will be skipped in the list. 90 } 91 } 92 93 // Show the label and icon for each application package. 94 CharSequence[] applicationNames = new CharSequence[foundPackages]; 95 mEntryDrawables = new Drawable[foundPackages]; 96 int index = 0; 97 int selectedIndex = -1; 98 for (ApplicationInfo appInfo : appInfos) { 99 if (appInfo != null) { 100 applicationNames[index] = appInfo.loadLabel(pm); 101 mEntryDrawables[index] = appInfo.loadIcon(pm); 102 if (defaultPackageName != null && 103 appInfo.packageName.contentEquals(defaultPackageName)) { 104 selectedIndex = index; 105 } 106 index++; 107 } 108 } 109 setEntries(applicationNames); 110 setEntryValues(packageNames); 111 if (selectedIndex != -1) { 112 setValueIndex(selectedIndex); 113 } else { 114 setValue(null); 115 } 116 } 117 118 @Override 119 protected void onPrepareDialogBuilder(Builder builder) { 120 int selectedIndex = findIndexOfValue(getValue()); 121 ListAdapter adapter = new AppArrayAdapter(getContext(), 122 R.layout.app_preference_item, getEntries(), mEntryDrawables, selectedIndex); 123 builder.setAdapter(adapter, this); 124 super.onPrepareDialogBuilder(builder); 125 } 126 } 127