android get cpu rate

    public static int getProcessCpuRate() {

        try {

            RandomAccessFile reader = new RandomAccessFile("/proc/stat", "r");

            String load = reader.readLine();

            String[] toks = load.split(" +");  // Split on one or more spaces

            long idle1 = Long.parseLong(toks[4]);

            long cpu1 = Long.parseLong(toks[2]) + Long.parseLong(toks[3]) + Long.parseLong(toks[5])

                    + Long.parseLong(toks[6]) + Long.parseLong(toks[7]) + Long.parseLong(toks[8]);

            try {

                Thread.sleep(360);

            } catch (Exception e) {}

            reader.seek(0);

            load = reader.readLine();

            reader.close();

            toks = load.split(" +");

            long idle2 = Long.parseLong(toks[4]);

            long cpu2 = Long.parseLong(toks[2]) + Long.parseLong(toks[3]) + Long.parseLong(toks[5])

                    + Long.parseLong(toks[6]) + Long.parseLong(toks[7]) + Long.parseLong(toks[8]);

            return (int) ((cpu2 - cpu1) * 100 / ((cpu2 + idle2) - (cpu1 + idle1)));

        } catch (IOException ex) {

            ex.printStackTrace();

        }

        return 0;

    }