I have a big problem, that I am reading 2^21 bytes from a video file which resides in Sdcard but when we write the same in ByteArrayOutputStream it throws an Exception as Out of Memory. I don't know why? Please suggest the right solution for the same.
Here is the stack trace.
Error Stack:
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)
Code:
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();
}
What you are doing isn't practical, but the way to do it is as follows:
File file = new File("/sdcard/E0022505.mp4");
try {
is = new FileInputStream(file);
} catch (FileNotFoundException e2) {
e2.printStackTrace();
}
byte[] fileData = new byte[file.length()];
int read = 0;
while(read != fileData.length) {
read += is.read(fileData, read, fileData.length - read);
}
//fileData now has all of the files bytes (don't forget to close is)