寫ByteArrayOutputStream我有我有不同於SD卡的居住,但是當我們在寫同在ByteArrayOutputStream它拋出一個異常作爲內存的視頻文件中讀取2^21個字節的大問題,我不知道爲什麼?請爲我提供正確的解決方案。內存不足的錯誤,而在Android的
在此先感謝。
錯誤堆棧:
11-03 19:24:23.193: ERROR/AndroidRuntime(28258): FATAL EXCEPTION: main
11-03 19:24:23.193: ERROR/AndroidRuntime(28258): java.lang.OutOfMemoryError
11-03 19:24:23.193: ERROR/AndroidRuntime(28258): at java.io.ByteArrayOutputStream.expand(ByteArrayOutputStream.java:93)
11-03 19:24:23.193: ERROR/AndroidRuntime(28258): at java.io.ByteArrayOutputStream.write(ByteArrayOutputStream.java:218)
11-03 19:24:23.193: ERROR/AndroidRuntime(28258): at com.example.TestCryptoActivity.onCreate(TestCryptoActivity.java:42)
11-03 19:24:23.193: ERROR/AndroidRuntime(28258): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
11-03 19:24:23.193: ERROR/AndroidRuntime(28258): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
11-03 19:24:23.193: ERROR/AndroidRuntime(28258): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
11-03 19:24:23.193: ERROR/AndroidRuntime(28258): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
11-03 19:24:23.193: ERROR/AndroidRuntime(28258): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
11-03 19:24:23.193: ERROR/AndroidRuntime(28258): at android.os.Handler.dispatchMessage(Handler.java:99)
11-03 19:24:23.193: ERROR/AndroidRuntime(28258): at android.os.Looper.loop(Looper.java:123)
11-03 19:24:23.193: ERROR/AndroidRuntime(28258): at android.app.ActivityThread.main(ActivityThread.java:4627)
11-03 19:24:23.193: ERROR/AndroidRuntime(28258): at java.lang.reflect.Method.invokeNative(Native Method)
11-03 19:24:23.193: ERROR/AndroidRuntime(28258): at java.lang.reflect.Method.invoke(Method.java:521)
11-03 19:24:23.193: ERROR/AndroidRuntime(28258): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
11-03 19:24:23.193: ERROR/AndroidRuntime(28258): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
11-03 19:24:23.193: ERROR/AndroidRuntime(28258): at dalvik.system.NativeStart.main(Native Method)
代碼:
try {
is = new FileInputStream("/sdcard/E0022505.mp4");
} catch (FileNotFoundException e2) {
// TODO Auto-generated catch block
e2.printStackTrace();
}
ByteArrayOutputStream bos = new ByteArrayOutputStream();
byte[] b = new byte[1024];
try {
while ((bytesRead = is.read(b)) != -1) {
bos.write(b, 0, bytesRead);//--------This position returns the same error
}
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
byte[] bytes = bos.toByteArray();
try {
String byteString = new String(bytes,"UTF-8");
System.out.println("the bytes array of video:"+byteString);
} catch (UnsupportedEncodingException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
ü感謝這麼多的代碼 –
對不起,這是怎麼回事應該修復的OutOfMemoryError如果你實際聲明:byte [] fileData = new byte [file.length()];所以你加載整個文件到內存? – Yar
那麼這種方法不會嘗試將另一個2MB塊作爲字符串分配。但總的來說(正如我在答案中所表明的那樣),如果可以的話,您希望避免這樣做,因爲這是不實際的。在他的情況下,我認爲有一個他想將整個文件加載到內存中的原因。這真的沒有在這裏指出。我相信他在三年前已經認識到了這一點,儘管如此它的全部都是毫無意義的。 –