volley get网络请求

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;

import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;

public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

String url = "http://www.baidu.com";
RequestQueue mRequestQueue = Volley.newRequestQueue(this);
StringRequest mStringRequest = new StringRequest(url,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
System.out.println("-----请求成功:"+response);

}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
System.out.println("-----请求失败:"+error.toString());
}
});
mRequestQueue.add(mStringRequest);
}
}