Android中通过代码检测系统是否有root权限

package lizm.root;

import java.io.DataOutputStream;

import android.app.Activity;
import android.util.Log;

public class RootManager{
public static boolean RootCommand(String command)
{
Process process = null;
DataOutputStream os = null;
try
{
process = Runtime.getRuntime().exec("su");
os = new DataOutputStream(process.getOutputStream());
os.writeBytes(command + "\n");
os.writeBytes("exit\n");
os.flush();
process.waitFor();
} catch (Exception e)
{
Log.d("*** DEBUG ***", "ROOT REE" + e.getMessage());
return false;
} finally
{
try
{
if (os != null)
{
os.close();
}
process.destroy();
} catch (Exception e)
{
}
}
Log.d("*** DEBUG ***", "Root SUC ");
return true;
}

}

package lizm.root;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.Toast;

public class MainActivity extends Activity {

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
String apkRoot="chmod 777 "+getPackageCodePath();
boolean root = RootManager.RootCommand(apkRoot);
Toast.makeText(this, "root: "+root, Toast.LENGTH_SHORT).show();
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
}