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