Android学习笔记--Volley加载框架

加载图片的两种方法

 //Volley加载图片  ImageLoader使用法
ImageLoader imageLoader = new ImageLoader(requestQueue,new ImageLoood());
        ImageLoader.ImageListener imageListener = imageLoader.getImageListener(imageView,R.mipmap.ic_launcher,R.mipmap.ic_launcher);
        imageLoader.get(strUrl,imageListener );

                //ImageRequest加载方法

        ImageRequest request = new ImageRequest(strUrl, new Response.Listener<Bitmap>() {
            @Override
            public void onResponse(Bitmap response) {
                imageView.setImageBitmap(response);
            }
        }, 0, 0, Bitmap.Config.RGB_565, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                imageView.setImageResource(R.mipmap.ic_launcher);
            }
        });
        requestQueue.add(request);

网络请求的

package com.wuxianedu.avollys;

import android.app.DownloadManager;
import android.icu.util.Measure;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;

import com.android.volley.AuthFailureError;
import com.android.volley.NetworkResponse;
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.HttpHeaderParser;
import com.android.volley.toolbox.JsonArrayRequest;
import com.android.volley.toolbox.JsonObjectRequest;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;

import org.json.JSONArray;

import java.io.UnsupportedEncodingException;
import java.util.HashMap;
import java.util.Map;

public class MainActivity extends AppCompatActivity implements View.OnClickListener{

    private RequestQueue requestQueue;
    private String mGeturl,mPosturl,mjSonurl;
    private TextView textView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        requestQueue = Volley.newRequestQueue(this);
        textView = (TextView) findViewById(R.id.tv_id);
        findViewById(R.id.but_id).setOnClickListener(this);
        findViewById(R.id.but_postid).setOnClickListener(this);
        findViewById(R.id.but_jsonid).setOnClickListener(this);
        mGeturl = "http://192.168.40.194/qiantai/admin/";
        mPosturl = "http://192.168.40.194/qiantai/admin/login_check.php";
        mjSonurl = "http://192.168.40.194/mimixun/";
    }

    @Override
    public void onClick(View view) {
        switch (view.getId()){
            case R.id.but_id:
                textView.setText("");
                Workrequest();
                break;
            case R.id.but_postid:
                textView.setText("");
                PostWorkrequest();
                break;
            case R.id.but_jsonid:
                textView.setText("");
                JSonWorkrequest();
                break;
        }
    }
    /**
     * Get请求网络数据
     */
    private void Workrequest() {
        StringRequest stringRequest = new StringRequest(mGeturl, new Response.Listener<String>() {
            @Override
            public void onResponse(String response) {
                textView.append(response);
            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                textView.setText("请求错误");
            }
        }) {
            @Override
            protected Response<String> parseNetworkResponse(NetworkResponse response) {
                String str = null;
                try {
                    str = new String(response.data, "UTF-8");
                } catch (UnsupportedEncodingException e) {
                    e.printStackTrace();
                }
                return Response.success(str,
                        HttpHeaderParser.parseCacheHeaders(response));
            }
        };
        requestQueue.add(stringRequest);
    }
    /**
     * 请求POST请求
     */
    private void PostWorkrequest() {
        StringRequest request = new StringRequest(Request.Method.POST, mPosturl, new Response.Listener<String>() {
            @Override
            public void onResponse(String response) {
                try {
                    String responsee = new String(response.getBytes("gb2312"),"utf-8");
                    textView.append(response);
                } catch (UnsupportedEncodingException e) {
                    e.printStackTrace();
                }
            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                textView.append("请求错误了");
            }
        }) {
            @Override
            protected Map<String, String> getParams() throws AuthFailureError {
                Map<String, String> map = new HashMap<>();
                map.put("username", "admin");
                map.put("userpass", "12346");
                return map;
            }
        };
        requestQueue.add(request);
    }

    private void JSonWorkrequest(){
        JsonArrayRequest jsonarr = new JsonArrayRequest(mjSonurl, new Response.Listener<JSONArray>() {
            @Override
            public void onResponse(JSONArray response) {
                textView.append(response.toString());
            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                textView.append("请求错误了啊");
            }
        });
        requestQueue.add(jsonarr);
    }
}

Xml文件

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.wuxianedu.avollys.MainActivity">

    <Button android:id="@+id/but_id"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Get请求" />

    <Button android:id="@+id/but_postid" android:layout_toRightOf="@+id/but_id"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="POSt请求" />

    <Button android:id="@+id/but_jsonid" android:layout_toRightOf="@+id/but_postid"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="JSOn请求" />
    <TextView android:id="@+id/tv_id" android:layout_below="@+id/but_id"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />
</RelativeLayout>