安卓root有什么用，Android--手機root獲取與判斷應用是否獲取

import android.util.Log;import java.io.DataOutputStream;
import java.io.File;/** * 判斷手機是否ROOT */  
public class isRoot{public static int root() {int root = 0;try {  if ((!new File("/system/bin/su").exists())  && (!new File("/system/xbin/su").exists())) {  root = 0;} else {  root = 1;}  } catch (Exception e) {  }  return root;  }/**** 判斷應用是否有root權限*/public static synchronized boolean getRootAhth(){Process process = null;DataOutputStream os = null;try{process = Runtime.getRuntime().exec("su");os = new DataOutputStream(process.getOutputStream());os.writeBytes("exit\n");os.flush();int exitValue = process.waitFor();if (exitValue == 0){return true;} else{return false;}} catch (Exception e){Log.d("*** DEBUG ***", "Unexpected error - Here is what I know: "+ e.getMessage());return false;} finally{try{if (os != null){os.close();}process.destroy();} catch (Exception e){e.printStackTrace();}}}
}

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