Android,method.invoke崩溃在SDK 26,Oreo？
作者：互联网
这是我在StackOverflow上的第一篇文章.
我在我的提升应用程序中使用了反射,如下所示.它在sdk< 26中运行良好但在sdk 26中我得到了java.lang.reflect.InvocationTargetException异常.我怎样才能在android 8中恢复工作？
我的代码是这样的：
Method pkgMethod = getPackageManager().getClass().getMethod("getPackageSizeInfo", String.class, IPackageStatsObserver.class);
pkgMethod.invoke(getPackageManager(), pkg.packageName, new IPackageStatsObserver.Stub() {
@Override
public void onGetStatsCompleted(PackageStats pStats, boolean succeeded) throws RemoteException {
long cacheSize = pStats.externalCacheSize;
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M)
cacheSize += pStats.cacheSize;
if (cacheSize > 0) {
Drawable icon = null;
try {
icon = getPackageManager().getApplicationIcon(pkg.packageName);
} catch (PackageManager.NameNotFoundException ignored) {
}
String name = pkg.packageName;
try {
PackageManager pm = getApplicationContext().getPackageManager();
name = (String) pm.getApplicationLabel(pm.getApplicationInfo(pkg.packageName, PackageManager.GET_META_DATA));
} catch (PackageManager.NameNotFoundException e) {
e.printStackTrace();
}
totalSize += cacheSize;
appList.add(new Items(icon, name, pkg.packageName, cacheSize, true, ""));
publishProgress();
}
countDownLatch.countDown();
}
});
这是我得到的例外：
java.lang.reflect.InvocationTargetException
04-05 05:20:14.027 2701-4724/com.mydidantivirus.android W/System.err:
at java.lang.reflect.Method.invoke(Native Method)
04-05 05:20:14.027 2701-4724/com.myantivirus.android W/System.err:
at com.my.antivirus.ui.JunkFileActivity$ScanTask.doInBackground(JunkFileActivity.java:285)
04-05 05:20:14.028 2701-4724/com.myantivirus.android W/System.err: at com.my.antivirus.ui.JunkFileActivity$ScanTask.doInBackground(JunkFileActivity.java:260)
04-05 05:20:14.028 2701-4724/com.myantivirus.android W/System.err: at android.os.AsyncTask$2.call(AsyncTask.java:333)
04-05 05:20:14.029 2701-4724/com.myantivirus.android W/System.err: at java.util.concurrent.FutureTask.run(FutureTask.java:266)
04-05 05:20:14.029 2701-4724/com.myantivirus.android W/System.err: at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:245)
04-05 05:20:14.029 2701-4724/com.myantivirus.android W/System.err: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162)
04-05 05:20:14.029 2701-4724/com.myantivirus.android W/System.err: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636)
04-05 05:20:14.029 2701-4724/com.myantivirus.android W/System.err: at java.lang.Thread.run(Thread.java:764)
04-05 05:20:14.030 2701-4724/com.myantivirus.android W/System.err: Caused by: java.lang.NullPointerException: Attempt to read from field 'long android.content.pm.PackageStats.externalCacheSize' on a null object reference
04-05 05:20:14.030 2701-4724/com.myantivirus.android W/System.err: at com.my.antivirus.ui.JunkFileActivity$ScanTask$1.onGetStatsCompleted(JunkFileActivity.java:288)
04-05 05:20:14.030 2701-4724/com.myantivirus.android W/System.err: at android.app.ApplicationPackageManager.getPackageSizeInfoAsUser(ApplicationPackageManager.java:2167)
04-05 05:20:14.030 2701-4724/com.myantivirus.android W/System.err: at android.content.pm.PackageManager.getPackageSizeInfo(PackageManager.java:5065)
04-05 05:20:14.030 2701-4724/com.myantivirus.android W/System.err: ... 9 more
我还在Android Oreo上尝试了一个缓存清理库,并得到了以下异常：
java.lang.reflect.InvocationTargetException
04-05 06:50:46.590 8639-8741/org.mazhuang.cleanexpert W/System.err: at
java.lang.reflect.Method.invoke(Native Method)
04-05 06:50:46.590 8639-8741/org.mazhuang.cleanexpert W/System.err: at org.mazhuang.cleanexpert.util.CleanUtil.freeAllAppsCache(CleanUtil.java:96)
04-05 06:50:46.591 8639-8741/org.mazhuang.cleanexpert W/System.err: at org.mazhuang.cleanexpert.ui.JunkCleanActivity$5.run(JunkCleanActivity.java:306)
04-05 06:50:46.591 8639-8741/org.mazhuang.cleanexpert W/System.err: at java.lang.Thread.run(Thread.java:764)
04-05 06:50:46.591 8639-8741/org.mazhuang.cleanexpert W/System.err: Caused by: java.lang.SecurityException: Neither user 10087 nor current process has android.permission.CLEAR_APP_CACHE.
04-05 06:50:46.591 8639-8741/org.mazhuang.cleanexpert W/System.err: at android.os.Parcel.readException(Parcel.java:1942)
04-05 06:50:46.591 8639-8741/org.mazhuang.cleanexpert W/System.err: at android.os.Parcel.readException(Parcel.java:1888)
04-05 06:50:46.591 8639-8741/org.mazhuang.cleanexpert W/System.err: at android.content.pm.IPackageManager$Stub$Proxy.freeStorageAndNotify(IPackageManager.java:4865)
04-05 06:50:46.591 8639-8741/org.mazhuang.cleanexpert W/System.err: at android.app.ApplicationPackageManager.freeStorageAndNotify(ApplicationPackageManager.java:2112)
04-05 06:50:46.592 8639-8741/org.mazhuang.cleanexpert W/System.err: at android.content.pm.PackageManager.freeStorageAndNotify(PackageManager.java:4996)
04-05 06:50:46.593 8639-8741/org.mazhuang.cleanexpert W/System.err: ... 4 more
解决方法:
更新
从Android O(API级别26),您不能将getPackageSizeInfo方法与reflaction一起使用.以下是一个代码,可以帮助你低于api 26级及以上：
private void getPackageSizeInfo(final Context context, String packageName) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
final StorageStatsManager storageStatsManager = (StorageStatsManager) context.getSystemService(Context.STORAGE_STATS_SERVICE);
final StorageManager storageManager = (StorageManager) context.getSystemService(Context.STORAGE_SERVICE);
try {
ApplicationInfo ai = context.getPackageManager().getApplicationInfo(packageName, 0);
StorageStats storageStats = storageStatsManager.queryStatsForUid(ai.storageUuid, getApplicationInfo().uid);
long cacheSize =storageStats.getCacheBytes();
long dataSize =storageStats.getDataBytes();
long apkSize =storageStats.getAppBytes();
Toast.makeText(context, cacheSize + ",," + dataSize + ",," + apkSize, Toast.LENGTH_LONG).show();
//long size += info.cacheSize;
} catch (Exception e) {
e.printStackTrace();
}
} else {
Method getPackageSizeInfo;
try {
getPackageSizeInfo = context.getPackageManager().getClass()
.getMethod("getPackageSizeInfo",
String.class, Class.forName("android.content.pm.IPackageStatsObserver"));
getPackageSizeInfo.invoke(context.getPackageManager(), packageName,
new IPackageStatsObserver.Stub() { //error
public void onGetStatsCompleted(
PackageStats pStats, boolean succeeded)
throws RemoteException {
//totalSize = totalSize + pStats.cacheSize;
//Log.d("size", totalSize+"");
Toast.makeText(getApplicationContext(), "size"+pStats.cacheSize + ",," + pStats.dataSize + ",," + pStats.codeSize, Toast.LENGTH_SHORT).show();
}
}
);
} catch (Exception e) {
try {
getPackageSizeInfo = context.getPackageManager().getClass()
.getMethod("getPackageSizeInfo",
String.class, Class.forName("android.content.pm.IPackageStatsObserver"));
getPackageSizeInfo.invoke(context.getPackageManager(), packageName,
new IPackageStatsObserver.Stub() { //error
public void onGetStatsCompleted(
PackageStats pStats, boolean succeeded)
throws RemoteException {
Toast.makeText(getApplicationContext(), "size"+pStats.cacheSize, Toast.LENGTH_SHORT).show();
}
}
);
} catch (Exception ee) {
Log.d("eeeeeeeeeee", "error");
ee.printStackTrace();
}
}
}
}
请注意,对于使代码有效的API级别低于26,您应根据以下内容配置AIDL和要求：https://stackoverflow.com/a/30278018/1939409
标签：android-8-0-oreo,android,reflection,permissions 来源： https://codeday.me/bug/20190927/1824940.html