Android应用中使用AsyncHttpClient来异步网络数据

首先下载AsyncHttpClient的库文件，可以自行搜索，可以到下面地址下载

http://download.csdn.net/detail/xujinyang1234/5767419

测试的Activity，用到了RequstClient,LoadCacheResponseLoginouthandler,LoadDatahandler三个重写的类

 

package com.example.asynchttpclienttest;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.widget.TextView;

import com.loopj.android.http.RequestParams;

public class MainActivity extends Activity {
    private TextView test;

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

    private void init() {
        test = (TextView) findViewById(R.id.test);
        System.out.println("拉拉");
        RequestParams param = new RequestParams();
        param.put("id", 1 + "");
        RequstClient.get(
                "http://58.192.23.75:8080/xiaoxiao2/ColumnServletAndroid",
                param, new LoadCacheResponseLoginouthandler(MainActivity.this,
                        new LoadDatahandler() {
                            @Override
                            public void onStart() {
                                super.onStart();
                                test.setText("开始拉去数据");
                            }

                            @Override
                            public void onSuccess(String data) {
                                super.onSuccess(data);
                                test.setText(data);
                                System.out.println("拉倒的数据" + data);
                            }

                            @Override
                            public void onFailure(String error, String message) {
                                super.onFailure(error, message);
                                test.setText("错误的数据" + message);
                            }

                            @Override
                            public void onFinish() {
                                super.onFinish();
                            }
                        }));
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

}

RequstClient.java

 

 

package com.example.asynchttpclienttest;

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

public class RequstClient {
    /**
     * 定义一个异步网络客户端 默认超时未20秒 当超过，默认重连次数为5次 默认最大连接数为10个
     */
    private static AsyncHttpClient mClient = new AsyncHttpClient();
    static {
        mClient.setTimeout(20000);
    }
    public static void post(String url, AsyncHttpResponseHandler handler) {
        post(url, null, handler);
    }
    /**
     * post 请求
     *
     * @param url
     *            API 地址
     * @param params
     *            请求的参数
     * @param handler
     *            数据加载句柄对象
     */
    public static void post(String url, RequestParams params,
            AsyncHttpResponseHandler handler) {
        System.out.println("进入post");
        mClient.post(url, params, handler);
    }
    public static void get(String url, AsyncHttpResponseHandler handler) {

    }
    public static void get(String url, RequestParams params,
            AsyncHttpResponseHandler handler) {
        System.out.println("进入get");
        mClient.get(url, params, handler);
    }
}

 

 

package com.example.asynchttpclienttest;

import org.apache.http.Header;

import android.content.Context;

import com.loopj.android.http.AsyncHttpResponseHandler;

public class LoadCacheResponseLoginouthandler extends AsyncHttpResponseHandler {
    private Context context;
    private LoadDatahandler mHandler;

    public LoadCacheResponseLoginouthandler(Context context,
            LoadDatahandler mHandler) {
        this.context = context;
        this.mHandler = mHandler;
    }
    @Override
    public void onStart() {
        super.onStart();
        mHandler.onStart();
    }
    @Override
    public void onFailure(Throwable error, String content) {
        super.onFailure(error, content);
        mHandler.onFailure("", "网络连接超时");
    }
    @Override
    public void onFinish() {
        super.onFinish();
        mHandler.onFinish();
    }

    @Override
    public void onSuccess(int statusCode, Header[] headers, String content) {
        super.onSuccess(statusCode, headers, content);
        System.out.println("得到的返回码" + statusCode);
        try {
            switch (statusCode) {
            case 200:
                mHandler.onSuccess(content);
                System.out.println("返回的内容" + content);
                break;
            case 401:
                onFailure("401", "没有登录");

                break;
            case 403:
                onFailure("404", "没有权限");
                break;
            default:
                break;
            }

        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 出错
     *
     * @param error
     * @param errorMessage
     */
    public void onFailure(String error, String errorMessage) {
        if (errorMessage != null) {
            mHandler.onFailure(error, errorMessage);
        }
    }
}

 

 

接口：

 

 

package com.example.asynchttpclienttest;

public class LoadDatahandler {
    /**
     * 加载数据时调用
     */
    public void onStart() {};
    /**
     * 加载数据调用,得到缓存数据
     * @param data
     */
    public void onLoadCaches(String data) {};
    /**
     * 当调用服务器接口成功获取数据时,调用这个方法
     * @param data
     */
    public void onSuccess(String data) {};

    /**
     * 当调用服务器接口获取数据失败时,调用这个方法
     * @param error     出错原因
     * @param message   出错原因描述
     */
    public void onFailure(String error, String message) {};
    /**
     * 加载完成时调用
     */
    public void onFinish() {};

}

 

扩展：

Android在AsyncHttpClient框架的基础上定制能直接返回对象数组的框架

 

转自：http://blog.csdn.net/mobilexu/article/details/9350467