root权限

引用：http://www.pocketdigi.com/20110719/408.html

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package com.pocketdigi; import java.io.DataInputStream; import java.io.DataOutputStream; import java.io.InputStream; import java.io.OutputStream; import android.app.Activity; import android.os.Bundle;   public class RootActivity extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); DataInputStream stream; if(isRooted()){ try { stream = Terminal("ping -c 2 www.pocketdigi.com"); //其实ping并不需要root权限 ,这里是ping 2次后才停止，所以启动后需要一点时间才会有显示 //你可以自己换成需要root权限的命令试试 String temp; while((temp=stream.readLine())!=null){ System.out.println(temp); //循环输出返回值 } } catch (Exception e1) { // TODO Auto-generated catch block e1.printStackTrace(); } } } public DataInputStream Terminal(String command) throws Exception { Process process = Runtime.getRuntime().exec("su"); //执行到这，Superuser会跳出来，选择是否允许获取最高权限 OutputStream outstream = process.getOutputStream(); DataOutputStream DOPS = new DataOutputStream(outstream); InputStream instream = process.getInputStream(); DataInputStream DIPS = new DataInputStream(instream); String temp = command + "\n"; //加回车 DOPS.writeBytes(temp); //执行 DOPS.flush(); //刷新，确保都发送到outputstream DOPS.writeBytes("exit\n"); //退出 DOPS.flush(); process.waitFor(); return DIPS; } public boolean isRooted() { //检测是否ROOT过 DataInputStream stream; boolean flag=false; try { stream = Terminal("ls /data/"); //目录哪都行，不一定要需要ROOT权限的 if(stream.readLine()!=null)flag=true; //根据是否有返回来判断是否有root权限 } catch (Exception e1) { // TODO Auto-generated catch block e1.printStackTrace();   }   return flag; }     }