Android root权限判断

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;
}


}