Displaying array values in the logcat

Question

I have the following array

final byte[] texttoprint = new byte[]{0x1b, 0x40, 0x1b,0x74,0x0D,
       (byte) 0x91,(byte) 0x92,(byte) 0x93,(byte) 0x94,(byte) 0x95,
       (byte) 0x96,(byte) 0x97,(byte) 0x98,(byte) 0x99,
       0x0A,0x0A,0x0A,0x0A,0x0A};

and I want to print its values to the logcat in Eclipse, like this:

0x1b , 0x40

and so on.

I tried this:

for (int index = 0; index < texttoprint.length;){
  Log.i("myactivity", String.format("%20x", texttoprint[index]));
}

But that does an never ending loop printing 1B.

With this code:

Log.i("myactivity", Arrays.toString(texttoprint));

it prints: [27, 64, 27...]

Where am I wrong?

Roger Lindsjö · Accepted Answer · 2012-09-11T06:17:06.510

4

In your loop you must also increment the index for each pass in the loop.

for (int index = 0; index < texttoprint.length; index++){
 Log.i("myactivity", String.format("0x%20x", texttoprint[index]));
}

or

for (byte b: texttoprint){
 Log.i("myactivity", String.format("0x%20x", b));
}

edited Sep 11 '12 at 06:17

answered Sep 10 '12 at 18:58

Roger Lindsjö

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and if i want to print all 0x1b and not only 1b? – kosbou Sep 10 '12 at 19:02
@YankeeWhiskey Updated the code to include your comment (missed that part of the question). – Roger Lindsjö Sep 11 '12 at 06:18

score 0 · Answer 2 · answered Dec 07 '18 at 13:25

print log.

            StringBuilder log = new StringBuilder();
            int i = 0;
            for (byte b : data.data) {
                i++;
                log.append(String.format("%02x", b));
                if (i % 4 == 0) {
                    log.append(" ");
                }
            }

Displaying array values in the logcat

2 Answers2