1、获取应用程序缓存信息
2、清理缓存（也可以不用步骤1，直接清理，步骤1只是为了知道哪些程序有缓存）
1）
- Method getPackageSizeInfo = pm.getClass().getMethod("getPackageSizeInfo", String.class, IPackageStatsObserver.class);
- List<ApplicationInfo> application = new ArrayList();
- application = pm.getInstalledApplications(0);
- for(int i=0;i<application.size();i++)
- {
- ApplicationInfo app = application.get(i);
- getPackageSizeInfo.invoke(pm, app.packageName, new IPackageStatsObserver.Stub()
- {
- @Override
- public void onGetStatsCompleted(PackageStats pStats, boolean succeeded) throws RemoteException
- {
- if(pStats.cacheSize != 0)
- {
- cacheSize += pStats.cacheSize;
- Log.e(TAG, "cacheSize: " + pStats.packageName + " ;" + pStats.cacheSize);
- }
- }
- });
- }
上面的方法 通过反射机制获取应用程序的缓存信息
2）
- Method localMethod = pm.getClass().getMethod("freeStorageAndNotify", Long.TYPE,IPackageDataObserver.class);
- Long localLong = Long.valueOf(getEnvironmentSize() - 1L);
- Object[] arrayOfObject = new Object[2];
- arrayOfObject[0] = localLong;
- localMethod.invoke(pm,localLong,new IPackageDataObserver.Stub()
- {
- @Override
- public void onRemoveCompleted(String packageName,
- boolean succeeded) throws RemoteException
- {
- }});
同样通过反射，来清除缓存
- private long getEnvironmentSize()
- {
- File dataFile = Environment.getDataDirectory();
- if (dataFile == null)
- return 0;
- else
- {
- StatFs localStatFs = new StatFs(dataFile.getPath());
- long l2 = localStatFs.getBlockSize();
- return localStatFs.getBlockCount() * l2;
- }
- }
需要用到3个AIDL：
IPackageDataObserver.aidl
IPackageStatsObserver.aidl
PackageStats.aidl