applying logcat filter programmatically

Question

I need to dump logcat with filter programmatically. I applied adb logcat -s "TAGNAME" but the app just "hung". there is a similar thread but there is no solution: Read filtered log cat(Programmatically)?

        try {
            Process process = Runtime.getRuntime().exec("logcat -s XXX");
            BufferedReader bufferedReader = new BufferedReader(
                    new InputStreamReader(process.getInputStream()));

            StringBuilder log = new StringBuilder();
            String line;
            while ((line = bufferedReader.readLine()) != null) {
                log.append(line);
                log.append(FragmentLog.LINE_SEPARATOR);
            }

            ((TextView) tv).setText(log.toString());

        } catch (IOException e) {
            ((TextView) tv).setText(R.string.default_blank);
        }

score 3 · Accepted Answer · answered Feb 21 '12 at 01:43

I am using another way to get my app work. Here is the code, in case anyone wants to know,.

    try {               
        Process process = Runtime.getRuntime().exec("logcat -d");
        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(process.getInputStream()));

        String line;

        Pattern pattern = Pattern.compile("XXX", 0);

        while ((line = bufferedReader.readLine()) != null) {
            if (patternu != null
                    && !pattern.matcher(line).find()) {
                continue;
            }
            log.append(line);
            log.append('\n');
        }

    } catch (IOException e) {

    }

I always get null when bufferedReader.readLine() is executed. — gonzobrains, May 07 '13 at 23:16

score 2 · Answer 2 · answered Feb 17 '12 at 05:29

2

Well first off this command will stream logcat and won't dump it. Hence it will never quit running. Also, if there is no content to report the BufferedReader is probably waiting for a full line to come in, so you are blocking.

answered Feb 17 '12 at 05:29

Bishnu

853
7
11

Great. well i need it to filter out some messages in logcat and dump it out. – ys126 Feb 17 '12 at 07:05

applying logcat filter programmatically

2 Answers2

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