本文通过一段代码给大家介绍android获取app应用程序大小的方法,由于android对这种方法进行了封装,我们没有权限去调用这个方法,只能通过aidl,然后用java的反射机制去调用系统级方法,感兴趣的朋友一起学习吧
Android对这种方法进行了封装,我们没有权限去调用这个方法,所以我们只能通过AIDL,然后利用Java的反射机制去调用系统级的方法。
下面上代码:(注释比较详细)
- /**
- * 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() {
- @Override
- public 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();
- }
- }
下面是两个AIDL文件的代码。。。
步骤(Android Studio):
1、在main文件夹下,建立一个aidl文件夹的文件夹
2、建立一个包,包名为android.content.pm
3、结构图
*******PackageStats.aidl文件***************
- /* //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;
****************IPackageStatusObserver.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;
- 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);
- }
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