点击获取网络图片及登录姓名及密码

效果图：

首先搭建布局：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.example.administrator.myloadtest.MainActivity">

    <Button
        android:id="@+id/btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="20dp"
        android:text="点击获取"
        android:onClick="volleyGet"/>


    <EditText
        android:id="@+id/ed_home_name"
        android:layout_width="match_parent"
        android:hint="用户名"
        android:layout_height="wrap_content" />

    <EditText
        android:id="@+id/ed_home_psw"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="密码"
        android:inputType="textPassword"/>

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="volley_post请求"
        android:onClick="volleyPost"/>


</LinearLayout>
然后：创建javaBean，网络接口的封装类

最后创建activity

package com.example.administrator.myloadtest;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.text.TextUtils;
import android.view.View;
import android.widget.EditText;
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 com.google.gson.Gson;

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

public class MainActivity extends AppCompatActivity {
    private static final String DATA_URL = "http://wx.feicuiedu.com:9094/yitao/GoodsServlet?method=getAll&pageNo=1";
    private static final String DATA_REGEST = "http://wx.feicuiedu.com:9094/yitao/UserWeb?method=register";
    private  static  final String GET_TAG="GET";
    private RequestQueue requestQueue;//请求队列

    private EditText mEdName;
    private EditText mEdPsw;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mEdName = (EditText) findViewById(R.id.ed_home_name);
        mEdPsw = (EditText) findViewById(R.id.ed_home_psw);

        requestQueue = Volley.newRequestQueue(this);
    }

    /** 使用Volley进行get请求 */
    public void volleyGet(View view){
        //1. 请求的方法 2.URL 3.请求成功的回调 4.请求失败的回调
        StringRequest request = new StringRequest(Request.Method.GET, DATA_URL, new Response.Listener<String>() {
            @Override
            public void onResponse(String json) {
                //请求成功，在主线程中执行
                Toast.makeText(MainActivity.this, "成功", Toast.LENGTH_SHORT).show();
                Toast.makeText(MainActivity.this, json, Toast.LENGTH_SHORT).show();

            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError volleyError) {
                //请求失败
                Toast.makeText(MainActivity.this, "请求失败", Toast.LENGTH_SHORT).show();
            }
        });
        request.setTag(GET_TAG);
        requestQueue.add(request);
    }

    /** 使用Volley进行Post请求（注册）*/
    public  void volleyPost(View view){
        //输入用户名和密码
        final String name=mEdName.getText().toString().trim();
        final String pass=mEdPsw.getText().toString().trim();
        //判断输入的内容是否为空
        if(TextUtils.isEmpty(name)){//判断name是是否为null或者“”；
            Toast.makeText(this,"名字不能为空",Toast.LENGTH_SHORT).show();
            return;
        }
        if(TextUtils.isEmpty(pass)){//判断pass
            Toast.makeText(this,"密码不能为空",Toast.LENGTH_SHORT).show();
            return;
        }

        //注册
        StringRequest request=new StringRequest(Request.Method.POST,DATA_REGEST, new Response.Listener<String>() {
            @Override
            public void onResponse(String s) {
                Toast.makeText(MainActivity.this, s, Toast.LENGTH_SHORT).show();
                Gson gson=new Gson();
                JavaBean responseBean = gson.fromJson(s, JavaBean.class);
                if(responseBean.code==1){
                    Toast.makeText(MainActivity.this, "注册成功", Toast.LENGTH_SHORT).show();
                }else if(responseBean.code==2){
                    Toast.makeText(MainActivity.this, "注册失败", Toast.LENGTH_SHORT).show();
                }


            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError volleyError) {
                Toast.makeText(MainActivity.this, "注册失败", Toast.LENGTH_SHORT).show();
            }
        }){
            @Override
            protected Map<String, String> getParams() throws AuthFailureError {
                Map<String,String> map=new HashMap<>();
                map.put("username",name);
                map.put("password",pass);
                return map;
            }
        };
        requestQueue.add(request);

    }
    @Override
    protected void onDestroy() {
        super.onDestroy();
        requestQueue.cancelAll(GET_TAG);
    }
}