Android开源库async-http的基本使用

android-async-http主要特征：处理异步Http请求，并通过匿名内部类处理回调结果，Http异步请求均位于非UI线程，不会阻塞UI操作,通过线程池处理并发请求处理文件上传、下载,响应结果自动打包JSON格式.自动处理连接断开时请求重连.使用android-async-http也非常简单，到官网http://loopj.com/android-async-http/下载依赖jar包，导入工程中libs文件夹下并添加到工程路径即可。通过下面的代码来创建一个异步请求

async-http的GET方式使用

private void asyncHttpClientGet() {

        //创建一个请求客户端
        AsyncHttpClient client = new AsyncHttpClient();
        String url = "http://10.150.249.211:8080/TestServer/api.jsp?action=login&machine_id=1&";
        
        //client使用GET方式进行网络访问
        client.get(url,new AsyncHttpResponseHandler(){
            @Override
            public void onSuccess(String content) {//请求成功回调
                super.onSuccess(content);

                Toast.makeText(MainActivity.this,content,Toast.LENGTH_SHORT).show();

            }

            @Override
            public void onFailure(Throwable error) {//请求失败回调
                super.onFailure(error);

                Toast.makeText(MainActivity.this,"请求失败",Toast.LENGTH_SHORT).show();

            }
        });
    }

async-http的POST方式使用

private void asyncHttpClientPost() {

        //创建一个请求客户端
        AsyncHttpClient client = new AsyncHttpClient();
        String url = "http://10.150.249.211:8080/TestServer/api.jsp";
        //创建请求参数
        RequestParams params = new RequestParams();
        params.put("action","login");
        params.put("machine_id","2");

        //client使用POST方式访问
        client.post(url,params,new AsyncHttpResponseHandler(){
            @Override
            public void onSuccess(String content) {//请求成功回调
                super.onSuccess(content);

                Toast.makeText(MainActivity.this,content,Toast.LENGTH_SHORT).show();

            }

            @Override
            public void onFailure(Throwable error) {//请求失败回调
                super.onFailure(error);

                Toast.makeText(MainActivity.this,"请求失败",Toast.LENGTH_SHORT).show();

            }
        });
    }

对async-http回调逻辑的二次封装：

自定义基于async-http库的网络访问基类

package com.example.zhaoyun.usingasynchttpclient;

import com.loopj.android.http.AsyncHttpClient;
import com.loopj.android.http.RequestParams;

public class RequestUtils {

    public static AsyncHttpClient client = new AsyncHttpClient();

    public static void clientGET(String url, NetConnectionCallback callback){

        client.get(url, callback);

    }

    public static void clientPOST(String url, RequestParams params, NetConnectionCallback callback){

        client.post(url, params, callback);

    }
}

自定义一个 基于async-http库的网络访问回调类

package com.example.zhaoyun.usingasynchttpclient;

import android.util.Log;

import com.loopj.android.http.AsyncHttpResponseHandler;

//自定义网络请求回调类，扩展自AsyncHttpResponseHandler
public abstract class NetConnectionCallback extends AsyncHttpResponseHandler {

    @Override
    public void onStart() {

        Log.i("info","请求开始,呈现进度提示框");
        super.onStart();
    }

    @Override
    public void onSuccess(String content) {

        Log.i("info","请求成功，隐藏进度提示框" + content);
        MyOnSuccess(content);
        super.onSuccess(content);
    }

    @Override
    public void onFailure(Throwable error) {

        Log.i("info","请求失败，隐藏进度提示框" + error);
        MyOnFailure(error);
        super.onFailure(error);
    }

    //抽象方法用于向主类传递请求回调结果
    public abstract void MyOnSuccess(String content);
    public abstract void MyOnFailure(Throwable error);
}

在主类中使用自定义的网络访问类

package com.example.zhaoyun.usingasynchttpclient;

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

import com.loopj.android.http.AsyncHttpClient;
import com.loopj.android.http.AsyncHttpResponseHandler;
import com.loopj.android.http.RequestParams;

public class MainActivity extends AppCompatActivity {

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

        btnRead = (Button) findViewById(R.id.btnRead);
        btnRead.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                asyncHttpClientPost();

            }
        });
    }

    private void asyncHttpClientPost() {
        String url = "http://10.150.249.211:8080/TestServer/api.jsp";
        //创建请求参数
        RequestParams params = new RequestParams();
        params.put("action","login");
        params.put("machine_id","2");

        //client使用POST方式访问
        RequestUtils.clientPOST(url, params, new NetConnectionCallback() {
            @Override
            public void MyOnSuccess(String content) {
                Toast.makeText(MainActivity.this, content, Toast.LENGTH_SHORT).show();
            }

            @Override
            public void MyOnFailure(Throwable error) {
                Toast.makeText(MainActivity.this, "请求失败", Toast.LENGTH_SHORT).show();

            }
        });
    }

    private void asyncHttpClientGet() {

        String url = "http://10.150.249.211:8080/TestServer/api.jsp?action=login&machine_id=1&";

        //client使用GET方式进行网络访问
        RequestUtils.clientGET(url, new NetConnectionCallback() {
            @Override
            public void MyOnSuccess(String content) {
                Toast.makeText(MainActivity.this, content, Toast.LENGTH_SHORT).show();
            }

            @Override
            public void MyOnFailure(Throwable error) {
                Toast.makeText(MainActivity.this, "请求失败", Toast.LENGTH_SHORT).show();

            }
        });
    }

    private Button btnRead;
}

测试结果
 
备注：代码中的url是我另外一个Demo里写的本地测试服务器url