| /* |
| * Copyright (C) 2012 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.inputmethod.latin; |
| |
| import android.content.Context; |
| import android.content.pm.ApplicationInfo; |
| import android.content.pm.PackageManager; |
| import android.os.AsyncTask; |
| import android.util.LruCache; |
| |
| public final class TargetApplicationGetter extends AsyncTask<String, Void, ApplicationInfo> { |
| private static final int MAX_CACHE_ENTRIES = 64; // arbitrary |
| private static LruCache<String, ApplicationInfo> sCache = |
| new LruCache<String, ApplicationInfo>(MAX_CACHE_ENTRIES); |
| |
| public static ApplicationInfo getCachedApplicationInfo(final String packageName) { |
| if (null == packageName) return null; |
| return sCache.get(packageName); |
| } |
| |
| public static void removeApplicationInfoCache(final String packageName) { |
| sCache.remove(packageName); |
| } |
| |
| public interface OnTargetApplicationKnownListener { |
| public void onTargetApplicationKnown(final ApplicationInfo info); |
| } |
| |
| private Context mContext; |
| private final OnTargetApplicationKnownListener mListener; |
| |
| public TargetApplicationGetter(final Context context, |
| final OnTargetApplicationKnownListener listener) { |
| mContext = context; |
| mListener = listener; |
| } |
| |
| @Override |
| protected ApplicationInfo doInBackground(final String... packageName) { |
| final PackageManager pm = mContext.getPackageManager(); |
| mContext = null; // Bazooka-powered anti-leak device |
| try { |
| final ApplicationInfo targetAppInfo = |
| pm.getApplicationInfo(packageName[0], 0 /* flags */); |
| sCache.put(packageName[0], targetAppInfo); |
| return targetAppInfo; |
| } catch (android.content.pm.PackageManager.NameNotFoundException e) { |
| return null; |
| } |
| } |
| |
| @Override |
| protected void onPostExecute(final ApplicationInfo info) { |
| mListener.onTargetApplicationKnown(info); |
| } |
| } |