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 AppArrayAdapter(Context context, int textViewResourceId, CharSequence[] objects, Drawable[] imageDrawables, int selectedIndex)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 getView(int position, View convertView, ViewGroup parent)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 AppListPreference(Context context, AttributeSet attrs)70 public AppListPreference(Context context, AttributeSet attrs) { 71 super(context, attrs); 72 } 73 setPackageNames(String[] packageNames, String defaultPackageName)74 public void setPackageNames(String[] packageNames, String defaultPackageName) { 75 // Look up all package names in PackageManager. Skip ones we can't find. 76 int foundPackages = 0; 77 PackageManager pm = getContext().getPackageManager(); 78 ApplicationInfo[] appInfos = new ApplicationInfo[packageNames.length]; 79 for (int i = 0; i < packageNames.length; i++) { 80 try { 81 appInfos[i] = pm.getApplicationInfo(packageNames[i], 0); 82 foundPackages++; 83 } catch (NameNotFoundException e) { 84 // Leave appInfos[i] uninitialized; it will be skipped in the list. 85 } 86 } 87 88 // Show the label and icon for each application package. 89 CharSequence[] applicationNames = new CharSequence[foundPackages]; 90 mEntryDrawables = new Drawable[foundPackages]; 91 int index = 0; 92 int selectedIndex = -1; 93 for (ApplicationInfo appInfo : appInfos) { 94 if (appInfo != null) { 95 applicationNames[index] = appInfo.loadLabel(pm); 96 mEntryDrawables[index] = appInfo.loadIcon(pm); 97 if (defaultPackageName != null && 98 appInfo.packageName.contentEquals(defaultPackageName)) { 99 selectedIndex = index; 100 } 101 index++; 102 } 103 } 104 setEntries(applicationNames); 105 setEntryValues(packageNames); 106 if (selectedIndex != -1) { 107 setValueIndex(selectedIndex); 108 } 109 } 110 111 @Override onPrepareDialogBuilder(Builder builder)112 protected void onPrepareDialogBuilder(Builder builder) { 113 int selectedIndex = findIndexOfValue(getValue()); 114 ListAdapter adapter = new AppArrayAdapter(getContext(), 115 R.layout.app_preference_item, getEntries(), mEntryDrawables, selectedIndex); 116 builder.setAdapter(adapter, this); 117 super.onPrepareDialogBuilder(builder); 118 } 119 } 120