/**  * 靜默安裝  * @param file  * @return  */ public boolean slientInstall(File file) {   boolean result = false;   Process process = null;   OutputStream out = null;   try {     process = Runtime.getRuntime().exec("su");     out = process.getOutputStream();     DataOutputStream dataOutputStream = new DataOutputStream(out);     dataOutputStream.writeBytes("chmod 777 " + file.getPath() + "/n");     dataOutputStream.writeBytes("LD_LIBRARY_PATH=/vendor/lib:/system/lib pm install -r " +         file.getPath());     // 提交命令     dataOutputStream.flush();     // 關(guān)閉流操作     dataOutputStream.close();     out.close();     int value = process.waitFor();          // 代表成功     if (value == 0) {       result = true;     } else if (value == 1) { // 失敗       result = false;     } else { // 未知情況       result = false;     }   } catch (IOException e) {     e.printStackTrace();   } catch (InterruptedException e) {     e.printStackTrace();   }      return result; }