2
私は昨日更新されたGoogle Playのアプリを持っており、Androidの4.x（4.1.2 - 4.4.4）。Androidのjava.lang.OutOfMemoryErrorのみSamsungのデバイス
次のように例外のトレースがある：私は次のトレース受信他の場合には
Fatal Exception: java.lang.RuntimeException: An error occured while executing doInBackground()
at android.os.AsyncTask$3.done(AsyncTask.java:300)
at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355)
at java.util.concurrent.FutureTask.setException(FutureTask.java:222)
at java.util.concurrent.FutureTask.run(FutureTask.java:242)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:841)
Caused by java.lang.OutOfMemoryError
at java.util.Arrays.copyOfRange(Arrays.java:2684)
at com.android.org.conscrypt.OpenSSLCipher.engineDoFinal(OpenSSLCipher.java:467)
at javax.crypto.Cipher.doFinal(Cipher.java:1204)
at com.ijsoft.cpul.Util.DbMainFunctions.com.ijsoft.cpul.Util.AES256Cipher.decrypt(DbMainFunctions.java:2059)
at com.ijsoft.cpul.Util.DbMainFunctions.initializeDb(DbMainFunctions.java:94)
at com.ijsoft.cpul.SplashActivity$InitializeDb.doInBackground$9ecd34e(SplashActivity.java:2095)
at android.os.AsyncTask$2.call(AsyncTask.java:288)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:841)
：エラーが発生した場合
Fatal Exception: java.lang.RuntimeException: An error occured while executing doInBackground()
at android.os.AsyncTask$3.done(AsyncTask.java:299)
at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
at java.util.concurrent.FutureTask.run(FutureTask.java:137)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
at java.lang.Thread.run(Thread.java:856)
Caused by java.lang.OutOfMemoryError
at java.io.ByteArrayOutputStream.expand(ByteArrayOutputStream.java:91)
at java.io.ByteArrayOutputStream.write(ByteArrayOutputStream.java:201)
at com.ijsoft.cpul.Util.DbMainFunctions.initializeDb(DbMainFunctions.java:90)
at com.ijsoft.cpul.SplashActivity$InitializeDb.doInBackground$9ecd34e(SplashActivity.java:2095)
at android.os.AsyncTask$2.call(AsyncTask.java:287)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
at java.util.concurrent.FutureTask.run(FutureTask.java:137)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
at java.lang.Thread.run(Thread.java:856)
Iはコードの一部を残す：
AES256Cipher.java
public class AES256Cipher {
public byte[] decrypt(byte[] textBytes, Context context)
throws java.io.UnsupportedEncodingException,
NoSuchAlgorithmException,
NoSuchPaddingException,
InvalidKeyException,
InvalidAlgorithmParameterException,
IllegalBlockSizeException,
BadPaddingException {
byte[] keyBytes = CommonFunctions.md5Package(context).getBytes();
byte[] ivBytes = new byte[16];
for (int j = 0; j < keyBytes.length; j+=2) {
ivBytes[j/2]=keyBytes[31-j];
}
AlgorithmParameterSpec ivSpec = new IvParameterSpec(ivBytes);
SecretKeySpec newKey = new SecretKeySpec(keyBytes, "AES");
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
cipher.init(Cipher.DECRYPT_MODE, newKey, ivSpec);
return cipher.doFinal(textBytes);
}
}
DbMainFunctions.java
public synchronized static int initializeDb(int release, Context context) {
int resultCode = 0;
try {
// Get the encrypted json file (database) from Assets
AssetManager am = context.getAssets();
InputStream is = am.open("assets");
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[] buff = new byte[4096];
int i;
while ((i = is.read(buff, 0, buff.length)) > 0) {
baos.write(buff, 0, i);
}
is.close();
baos.close();
resultCode = updateDb(baos.toByteArray(), release, context);
//baos.close();
} catch (Exception e) {
Log.e("DbMainFunctions", e.getMessage());
//e.printStackTrace();
resultCode = -1;
}
return resultCode;
}
public synchronized static int updateDb(byte[] cipherJson, int release, Context context) {
int resultCode = 0;
AES256Cipher aes256;
try {
aes256 = new AES256Cipher();
cipherJson = aes256.decrypt(cipherJson, context);
} catch (UnsupportedEncodingException | NoSuchAlgorithmException | NoSuchPaddingException | InvalidKeyException |
InvalidAlgorithmParameterException | IllegalBlockSizeException | BadPaddingException e) {
Log.e("DbMainFuctions", e.getMessage());
return -2;
}
...
}
私のアプリケーションは、その時点で行い、暗号化されたファイル（ファイル名：資産）を取得することですAPKに含ま資産ディレクトリからAES256とします。その後、ファイルは解読され、バイト配列に保存されます。このファイルのサイズは約4.4 MBです。 initializeDb（）メソッドは、doInBackground（）中にAsyncTaskから呼び出されます。つまり、すべての前のコードがAsyncTaskで実行されます。