Android 回显
    //执行
     private void playRunTime(String cmd) throws Exception {
         Process p = Runtime.getRuntime().exec(cmd);
         InputStream is = p.getInputStream();
         BufferedReader reader = new BufferedReader(new InputStreamReader(is));
         String line;
         while ((line = reader.readLine()) != null) {
             tv_result.append(line + "\n");
         }
         p.waitFor();
         is.close();
         reader.close();
         p.destroy();
     }
     
 若cmd 执行后回显的字符太长,导致string 无法完整保存结果该如何处理
StringBuilder outputBuilder = new StringBuilder();
 String line;
 while ((line = reader.readLine()) != null) {
     outputBuilder.append(line).append("\n");
 }
  
git push mega HEAD:refs/for/
repo forall -c 'git reset --hard'
 repo forall -c 'git clean -f -d' 
 repo sync -d -c --no-tags
