Android开发中怎么实现一个静默安装功能

    // 申请su权限    Process process = Runtime.getRuntime().exec("su");    dataOutputStream = new DataOutputStream(process.getOutputStream());    // 执行pm install命令    String command = "pm install -r " + apkPath + "\n";    dataOutputStream.write(command.getBytes(Charset.forName("utf-8")));    dataOutputStream.flush();    dataOutputStream.writeBytes("exit\n");    dataOutputStream.flush();    process.waitFor();    errorStream = new BufferedReader(new InputStreamReader(process.getErrorStream()));    String msg = "";    String line;    // 读取命令的执行结果    while ((line = errorStream.readLine()) != null) {      msg += line;    }    Log.d("TAG", "install msg is " + msg);    // 如果执行结果中包含Failure字样就认为是安装失败，否则就认为安装成功    if (!msg.contains("Failure")) {      result = true;    }