码：
@H_502_2@void clearCache() {
if (mClearCacheObserver == null) {
mClearCacheObserver = new CachePackageDataObserver();
}
PackageManager mPM = getPackageManager();
@SuppressWarnings("rawtypes")
final Class[] classes = {Long.TYPE,IPackageDataObserver.class};
Long localLong = Long.valueOf(CACHE_APP);
try {
Method localMethod =
mPM.getClass().getMethod("freeStorageAndNotify",classes);
localMethod.setAccessible(true);
// Start of inner try-catch block
try {
localMethod.invoke(mPM,localLong,mClearCacheObserver);
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalAccessException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InvocationTargetException e) {
// TODO Auto-generated catch block
e.getCause().printStackTrace();
}
// End of inner try-catch block
} catch (NoSuchMethodException e1) {
e1.printStackTrace();
}
}
@H_301_4@logcat的：
@H_502_2@java.lang.SecurityException: Neither user 10206 nor current process has android.permission.CLEAR_APP_CACHE.
at android.os.Parcel.readException(Parcel.java:1620)
at android.os.Parcel.readException(Parcel.java:1573)
at android.content.pm.IPackageManager$Stub$Proxy.freeStorageAndNotify(IPackageManager.java:5081)
at android.app.ApplicationPackageManager.freeStorageAndNotify(ApplicationPackageManager.java:2500)
at android.content.pm.PackageManager.freeStorageAndNotify(PackageManager.java:4710)
at java.lang.reflect.Method.invoke(Native Method)
at com.onexsoftech.clearcacheapp.MainActivity.clearCache(MainActivity.java:278)
at com.onexsoftech.clearcacheapp.MainActivity.insertDummyContactWrapper1(MainActivity.java:495)
at com.onexsoftech.clearcacheapp.MainActivity.insertDummyContact(MainActivity.java:472)
解决方法
在Android 6.0,
CLEAR_APP_CACHE had a protectionLevel of dangerous之前,普通SDK应用程序可以在清单中请求它.
@H_301_4@从Android 6.0,CLEAR_APP_CACHE has a protectionLevel of signature|privileged开始.普通的Android应用程序无法拥有此权限.如果您的应用程序使用固件的签名密钥签名或者您已安装在特权系统分区上,则只能保留此权限.
