import android.util.Log;

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

import static android.content.ContentValues.TAG;

/**
 * Created by lei on 2017/8/21.
 */

public class ComUtility {
    private static final String TAG = "ComUtility";

    /** 执行控制台命令，参数为命令行字符串方式，申请Root控制权限*/
    public static boolean RootCommand(String command){
        Process process = null;
        DataOutputStream os = null;
      /*  BufferedReader buf=null;
        InputStream is = null;*/
        try{
            process = Runtime.getRuntime().exec("su");//执行这一句，superuser.apk就会弹出授权对话框
            os = new DataOutputStream(process.getOutputStream());
            os.writeBytes(command + "\n");
/*
            buf = new BufferedReader(new InputStreamReader(process.getInputStream()));
*/
         /*   String result=buf.readLine();
            Log.d(TAG,"result is "+result);*/
            os.writeBytes("exit\n");
            os.flush();
            process.waitFor();
        } catch (Exception e){
            Log.e(TAG, "获取root权限失败： " + e.getMessage());
            return false;
        }
        Log.d(TAG, "获取root权限成功");
        return true;
    }


    public static void execCommand(String command) throws IOException {
        Runtime runtime = Runtime.getRuntime();
        Process proc = runtime.exec(command);
        //proc = Runtime.getRuntime().exec("su");
        try {
            if (proc.waitFor() != 0) {
                System.err.println("exit value = " + proc.exitValue());
            }
            BufferedReader in = new BufferedReader(new InputStreamReader(
                    proc.getInputStream()));
            StringBuffer stringBuffer = new StringBuffer();
            String line = null;
            while ((line = in.readLine()) != null) {
                stringBuffer.append(line+"-");
            }
           //打印出执行cmd命令后返回的数据
            System.out.println("****"+stringBuffer.toString());

        } catch (InterruptedException e) {
            System.err.println(e);
        }
    }
    /**
     * 执行命令
     * @param command
     * @return
     */
    public static String android_command (String command) {
        Process process = null;
        BufferedReader reader = null;
        StringBuffer buffer = new StringBuffer();
        String temp;
        try {
            process = Runtime.getRuntime().exec(command);
            reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
            while ((temp = reader.readLine()) != null) {
                buffer.append(temp);
            }
            return buffer.toString();
        } catch (IOException e) {
            e.printStackTrace();
        }
        
        return "";
    }
}

参考链接：

java Runtime.exec()执行shell/cmd命令：常见的几种陷阱与一种完善实现
https://www.jianshu.com/p/af4b3264bc5d