/*** 作用：-----获取包的大小-----* @param context 上下文* @param pkgName app的包名* @param appInfo 实体类，用于存放App的某些信息*/public static void getPkgSize(final Context context, String pkgName, final PhoneAppInfo appInfo) {// getPackageSizeInfo是PackageManager中的一个private方法，所以需要通过反射的机制来调用Method method;try {method = PackageManager.class.getMethod("getPackageSizeInfo",new Class[]{String.class, IPackageStatsObserver.class});// 调用 getPackageSizeInfo 方法，需要两个参数：1、需要检测的应用包名；2、回调method.invoke(context.getPackageManager(), pkgName,new IPackageStatsObserver.Stub() {@Overridepublic void onGetStatsCompleted(PackageStats pStats, boolean succeeded) throws RemoteException {if (succeeded && pStats != null) {synchronized (PhoneAppInfo.class) {appInfo.setCatchSize(pStats.cacheSize);//缓存大小appInfo.setDataSize(pStats.dataSize);  //数据大小appInfo.setCodeSize(pStats.codeSize);  //应用大小appInfo.setAppSize(pStats.cacheSize + pStats.codeSize + pStats.dataSize);//应用的总大小Log.d("asdasdxx",appInfo.getAppSize()+"");}}}});} catch (NoSuchMethodException | InvocationTargetException | IllegalAccessException e) {e.printStackTrace();}}

/* //device/java/android/android/view/WindowManager.aidl
**
** Copyright 2007, 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 android.content.pm;parcelable PackageStats;

/*
**
** Copyright 2007, 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 android.content.pm;import android.content.pm.PackageStats;
/*** API for package data change related callbacks from the Package Manager.* Some usage scenarios include deletion of cache directory, generate* statistics related to code, data, cache usage(TODO)* {@hide}*/
oneway interface IPackageStatsObserver {void onGetStatsCompleted(in PackageStats pStats, boolean succeeded);
}