Android繼承了linux權(quán)限嚴(yán)格的優(yōu)點(diǎn),那么大家知道android如何實(shí)現(xiàn)運(yùn)行底層linux外部命令嗎?下文小編就分享了android實(shí)現(xiàn)運(yùn)行底層linux外部命令的方法，希望對大家有所幫助。

android實(shí)現(xiàn)運(yùn)行底層linux外部命令方法

android的底層實(shí)際是Linux內(nèi)核，當(dāng)然在shell環(huán)境下可以運(yùn)行l(wèi)inux命令，尤其是經(jīng)過root處理的android系統(tǒng)，基本上可以通過調(diào)用linux命令完全控制手機(jī)，下面的RootCmd.java代碼就是實(shí)現(xiàn)運(yùn)行l(wèi)inux外部命令。

package my.android.code;

import android.os.Environment;

import dalvik.annotation.Signature;

import java.io.BufferedReader;

import java.io.DataInputStream;

import java.io.DataOutputStream;

import java.io.File;

import java.io.FileReader;

import java.io.InputStream;

import java.io.OutputStream;

import java.util.Vector;

public final class RootCmd

{

//執(zhí)行l(wèi)inux命令并且輸出結(jié)果

protected static Vector execRootCmd(String paramString)

{

Vector localVector = new Vector();

try

{

Process localProcess = Runtime.getRuntime().exec("su ");//經(jīng)過Root處理的android系統(tǒng)即有su命令

OutputStream localOutputStream = localProcess.getOutputStream();

DataOutputStream localDataOutputStream = new DataOutputStream(localOutputStream);

InputStream localInputStream = localProcess.getInputStream();

DataInputStream localDataInputStream = new DataInputStream(localInputStream);

String str1 = String.valueOf(paramString);

String str2 = str1 + "/n";

localDataOutputStream.writeBytes(str2);

localDataOutputStream.flush();

String str3 = localDataInputStream.readLine();

localVector.add(str3);

localDataOutputStream.writeBytes("exit/n");

localDataOutputStream.flush();

localProcess.waitFor();

return localVector;

}

catch (Exception localException)

{

localException.printStackTrace();

}

}

//執(zhí)行l(wèi)inux命令但不關(guān)注結(jié)果輸出

protected static int execRootCmdSilent(String paramString)

{

try

{

Process localProcess = Runtime.getRuntime().exec("su");

Object localObject = localProcess.getOutputStream();

DataOutputStream localDataOutputStream = new DataOutputStream((OutputStream)localObject);

String str = String.valueOf(paramString);

localObject = str + "/n";

localDataOutputStream.writeBytes((String)localObject);

localDataOutputStream.flush();

localDataOutputStream.writeBytes("exit/n");

localDataOutputStream.flush();

localProcess.waitFor();

localObject = localProcess.exitValue();

return localObject;

}

catch (Exception localException)

{

localException.printStackTrace();

}

}

//判斷機(jī)器Android是否已經(jīng)root，即是否獲取root權(quán)限

protected static boolean haveRoot()

{

int i = execRootCmdSilent("echo test"); //通過執(zhí)行測試命令來檢測

if (i != -1) return true;

retrun false;

}

}