如果对字符串的声明不起作用

Question

Hello so im working on an app for windows(C#) and android(Java) that the two communicate through TCP and i have got them both sending each other strings but when i want to see if the received string is equal to "abc", it wont work for some reason with the java side(I think). This is a bit of the java code for the android side

int bytesRead;
byte[] outputOutStream = new byte[1024];
bytesRead = ins.read(outputOutStream, 0, outputOutStream.length);

String received;
received= Integer.toString(bytesRead);

String str = new String(outputOutStream);

txtView1.setText(str);

String code = "abc";
if (str.equals(code)) {
    AlertDialog alertDialog = new AlertDialog.Builder(MainActivity.this).create();
    alertDialog.setTitle("You Said...");
    alertDialog.setMessage(str);
    alertDialog.show();
}

But for some reason it wont have the AlertDialog pop up when I make the Windows(C#) send the string "abc" through.

Answer 1

Dump the byte content of the string using Arrays.toString(str.getBytes()) .

I suspect the string will have lots of null bytes at the end because outputOutStream is not completely filled. The constructor you need is String(byte[] bytes, int offset, int length) . Invoke it with 0 as the offset and bytesRead as the length.