how to get memory usage and cpu usage by application?

Question

I found this code to get overall cpu usage. is this possible to convert this to tell cpu usage by process? Is there any API by which we can get CPU or Memory usage of android?

Answer 1

Try this:

    private float getCpuPer() { //for single process

    float cpuPer = 0;
    try {
        String[] cmd = {"top", "-n", "1"};
        Process process = Runtime.getRuntime().exec(cmd);
        BufferedReader stdInput = new BufferedReader(new
                InputStreamReader(process.getInputStream()));

        BufferedReader stdError = new BufferedReader(new
                InputStreamReader(process.getErrorStream()));

        // read the output from the command
        //System.out.println("Here is the standard output of the command:\n");
        String s = null;
        while ((s = stdInput.readLine()) != null) {
            if (s.contains("your process name")) {
                String [] arr = s.split(" ");
                for (int i = 0; i < arr.length; i++) {
                    if (arr[i].contains("%")) {
                        s = arr[i].replace("%", "");
                        cpuPer = Float.parseFloat(s);
                        break;
                    }
                }
                //System.out.println(s);
            }
        }

        // read any errors from the attempted command
        //System.out.println("Here is the standard error of the command (if any):\n");
        //while ((s = stdError.readLine()) != null) {
            //System.out.println(s);
        //}
    } catch (IOException e) {
        e.printStackTrace();
    }
    return cpuPer;
}