Android 運行底層linux外部命令的實現

Android運行底層linux外部命令的實現 android的底層實際是Linux核心，當然在shell環境下可以運行linux命令，尤其是經過root處理的android系統，基本上可以通過調用linux命令完全控制手機，下面的RootCmd.java代碼就是實現運行linux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{  //執行linux命令並且輸出結果  protected static Vector execRootCmd(String paramString)  {    Vector localVector = new Vector();    try    {      Process localProcess = Runtime.getRuntime().exec("su ");//經過Root處理的android系統即有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();    }  }    //執行linux命令但不關注結果輸出  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();    }  }  //判斷機器Android是否已經root，即是否擷取root許可權  protected static boolean haveRoot()  {    int i = execRootCmdSilent("echo test"); //通過執行測試命令來檢測    if (i != -1)  return true;    retrun false;  } }