android 關掉當前進程

 private void killProcess(Context mAct) {        // TODO Auto-generated method stub        Log.i(TAG, "killProcess");        String packageName =  mAct.getPackageName();        String processId = "";        try {            Runtime r = Runtime.getRuntime();            Process p = r.exec("ps");            BufferedReader br = new BufferedReader(new InputStreamReader(p                    .getInputStream()));            String inline;            while ((inline = br.readLine()) != null) {                if (inline.contains(packageName)) {                    Log.i(TAG, "" + inline);                    break;                }            }            br.close();            StringTokenizer processInfoTokenizer = new StringTokenizer(inline);            int count = 0;            while (processInfoTokenizer.hasMoreTokens()) {                count++;                processId = processInfoTokenizer.nextToken();                if (count == 2) {                    break;                }            }            Log.e(TAG, "kill process : " + processId);            r.exec("kill -15 " + processId);        } catch (IOException ex) {            Log.e(TAG, "" + ex.getStackTrace());        }    }