Printing logcat to a file with filters? Using grep?

Asked May 04 '22 at 16:35

Active May 04 '22 at 16:35

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I am very easily printing my logcat to file by doing this:

Process process = Runtime.getRuntime().exec( "logcat -f test.txt");

But I would like to filter the content based on matching words, I thought about using grep and the operator >to print to file but that didn't work. No file is being created.

Process process = Runtime.getRuntime().exec("logcat -d | grep -n \"System.out\" > test.txt");

asked May 04 '22 at 16:35

butexa

Does `Runtime.getRuntime().exec(new String[] { "sh", "logcat -d | grep -n \"System\\.out\" > test.txt" });` work? – Wiktor Stribiżew May 04 '22 at 19:54
Nope, it does not. – butexa May 05 '22 at 07:07
Try [this approach](https://stackoverflow.com/a/16238948/3832970), using `ProcessBuilder` (like `ProcessBuilder builder = new ProcessBuilder("sh", "logcat -d | grep -n \"System\\.out\""); builder.redirectOutput(new File("test.txt")); Process p = builder.start();`). Also, maybe try with `bash` rather than `sh`. – Wiktor Stribiżew May 05 '22 at 07:14
It creates the file but it's empty. – butexa May 05 '22 at 08:52
Did you try to also set `builder.redirectError(new File("test.txt"));`? – Wiktor Stribiżew May 05 '22 at 08:56
I get 'sh: logcat -d: No such file or directory' – butexa May 05 '22 at 09:13

Printing logcat to a file with filters? Using grep?

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