Volley 的 小实例

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;

import com.android.volley.AuthFailureError;
import com.android.volley.Request;
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;

import java.util.HashMap;
import java.util.Map;

public class VolleyActivity extends AppCompatActivity {

RequestQueue queue;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_volley);
queue = Volley.newRequestQueue(this);
}
public void stringRequestClick(View view){
// stringRequestMethod1();
stringRequestMethod2();
}

private void stringRequestMethod2(){
int method = Request.Method.POST;
String url = "http://192.168.1.2:8080/AndroidServer/LoginServlet";
//请求成功后的回调接口
Response.Listener listener = new Response.Listener<String>() {
@Override
public void onResponse(String s) {
Toast.makeText(VolleyActivity.this, s, Toast.LENGTH_SHORT).show();
}
};
//请求失败后回调的接口
Response.ErrorListener errorListener = new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError volleyError) {
Toast.makeText(VolleyActivity.this, volleyError.getMessage(), Toast.LENGTH_SHORT).show();
}
};
StringRequest post = new StringRequest(method,url,listener,errorListener){
@Override
protected Map<String, String> getParams() throws AuthFailureError {
Map<String,String> params = new HashMap<>();
params.put("username","admin");
params.put("password","123");
return params;
}
};
queue.add(post);
}

/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

//字符串请求,GET方式，没有参数
private void stringRequestMethod1(){
int method = Request.Method.GET; //请求方式
String url = "http://www.baidu.com"; //请求地址
//请求成功后的回调接口
Response.Listener listener = new Response.Listener<String>() {
@Override
public void onResponse(String s) {
Toast.makeText(VolleyActivity.this, s, Toast.LENGTH_SHORT).show();
}
};
//请求失败后回调的接口
Response.ErrorListener errorListener = new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError volleyError) {
Toast.makeText(VolleyActivity.this, volleyError.getMessage(), Toast.LENGTH_SHORT).show();
}
};
//创建请求对象
StringRequest get = new StringRequest(method,url,listener,errorListener);
queue.add(get);
}
}


需要设置 网络权限在清单文件

GET方式  无参的运行结果