1 /* 2 * Copyright (C) 2009 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.quicksearchbox.util; 18 19 import android.content.ContentResolver; 20 import android.content.Context; 21 import android.content.pm.ApplicationInfo; 22 import android.content.pm.PackageManager; 23 import android.content.res.Resources; 24 import android.net.Uri; 25 import android.util.Log; 26 27 import java.util.HashSet; 28 import java.util.List; 29 import java.util.Set; 30 31 /** 32 * General utilities. 33 */ 34 public class Util { 35 36 private static final String TAG = "QSB.Util"; 37 setOfFirstN(List<A> list, int n)38 public static <A> Set<A> setOfFirstN(List<A> list, int n) { 39 int end = Math.min(list.size(), n); 40 HashSet<A> set = new HashSet<A>(end); 41 for (int i = 0; i < end; i++) { 42 set.add(list.get(i)); 43 } 44 return set; 45 } 46 getResourceUri(Context packageContext, int res)47 public static Uri getResourceUri(Context packageContext, int res) { 48 try { 49 Resources resources = packageContext.getResources(); 50 return getResourceUri(resources, packageContext.getPackageName(), res); 51 } catch (Resources.NotFoundException e) { 52 Log.e(TAG, "Resource not found: " + res + " in " + packageContext.getPackageName()); 53 return null; 54 } 55 } 56 getResourceUri(Context context, ApplicationInfo appInfo, int res)57 public static Uri getResourceUri(Context context, ApplicationInfo appInfo, int res) { 58 try { 59 Resources resources = context.getPackageManager().getResourcesForApplication(appInfo); 60 return getResourceUri(resources, appInfo.packageName, res); 61 } catch (PackageManager.NameNotFoundException e) { 62 Log.e(TAG, "Resources not found for " + appInfo.packageName); 63 return null; 64 } catch (Resources.NotFoundException e) { 65 Log.e(TAG, "Resource not found: " + res + " in " + appInfo.packageName); 66 return null; 67 } 68 } 69 getResourceUri(Resources resources, String appPkg, int res)70 private static Uri getResourceUri(Resources resources, String appPkg, int res) 71 throws Resources.NotFoundException { 72 String resPkg = resources.getResourcePackageName(res); 73 String type = resources.getResourceTypeName(res); 74 String name = resources.getResourceEntryName(res); 75 return makeResourceUri(appPkg, resPkg, type, name); 76 } 77 makeResourceUri(String appPkg, String resPkg, String type, String name)78 private static Uri makeResourceUri(String appPkg, String resPkg, String type, String name) { 79 Uri.Builder uriBuilder = new Uri.Builder(); 80 uriBuilder.scheme(ContentResolver.SCHEME_ANDROID_RESOURCE); 81 uriBuilder.encodedAuthority(appPkg); 82 uriBuilder.appendEncodedPath(type); 83 if (!appPkg.equals(resPkg)) { 84 uriBuilder.appendEncodedPath(resPkg + ":" + name); 85 } else { 86 uriBuilder.appendEncodedPath(name); 87 } 88 return uriBuilder.build(); 89 } 90 } 91