androidasynchttp开源项目的GET或POST方式实现

android-async-http是一个强大的网络请求库，这个网络请求库是基于Apache HttpClient库之上的一个异步网络请求处理库，网络处理均基于Android的非UI线程，通过回调方法处理请求结果。
android-async-http是一个强大的第三方开源网络请求库，

官网源码：https://github.com/loopj/android-async-http

官网教程：http://loopj.com/android-async-http/


这个网络请求库是基于Apache HttpClient库之上的一个异步网络请求处理库，网络处理均基于Android的非UI线程，通过回调方法处理请求结果。

主要类介绍

AsyncHttpRequest

继承自Runnabler，被submit至线程池执行网络请求并发送start，success等消息


AsyncHttpResponseHandler

接收请求结果，一般重写onSuccess及onFailure接收请求成功或失败的消息，还有onStart，onFinish等消息


TextHttpResponseHandler

继承自AsyncHttpResponseHandler，只是重写了AsyncHttpResponseHandler的onSuccess和onFailure方法，将请求结果由byte数组转换为String


JsonHttpResponseHandler

继承自TextHttpResponseHandler，同样是重写onSuccess和onFailure方法，将请求结果由String转换为JSONObject或JSONArray


BaseJsonHttpResponseHandler

继承自TextHttpResponseHandler，是一个泛型类，提供了parseResponse方法，子类需要提供实现，将请求结果解析成需要的类型，子类可以灵活地使用解析方法，可以直接原始解析，使用gson等。


RequestParams

请求参数，可以添加普通的字符串参数，并可添加File，InputStream上传文件


AsyncHttpClient

核心类，使用HttpClient执行网络请求，提供了get，put，post，delete，head等请求方法，使用起来很简单，只需以url及RequestParams调用相应的方法即可，还可以选择性地传入Context，用于取消Content相关的请求，同时必须提供ResponseHandlerInterface（AsyncHttpResponseHandler继承自ResponseHandlerInterface）的实现类，一般为AsyncHttpResponseHandler的子类，AsyncHttpClient内部有一个线程池，当使用AsyncHttpClient执行网络请求时，最终都会调用sendRequest方法，在这个方法内部将请求参数封装成AsyncHttpRequest（继承自Runnable）交由内部的线程池执行。


SyncHttpClient

继承自AsyncHttpClient，同步执行网络请求，AsyncHttpClient把请求封装成AsyncHttpRequest后提交至线程池，SyncHttpClient把请求封装成AsyncHttpRequest后直接调用它的run方法。


服务器端php测试代码：

<?php
$data = array(
'status'=>'success', 
'get'=>json_encode($_GET), 
'post'=>json_encode($_POST),
'upload'=>json_encode($_FILES)
);
echo json_encode($data);

?>

android客户端测试代码：

package com.penngo.http;

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

public class HttpUtil {
    private static final String BASE_URL = "http://192.168.17.99/";

    private static AsyncHttpClient client = new AsyncHttpClient();

    public static void setTimeout(){
        client.setTimeout(60000);
    }

    public static void get(String url, RequestParams params, AsyncHttpResponseHandler responseHandler) {
        client.get(getAbsoluteUrl(url), params, responseHandler);
    }

    public static void post(String url, RequestParams params, AsyncHttpResponseHandler responseHandler) {
        client.post(getAbsoluteUrl(url), params, responseHandler);
    }

    public static void download(String url, RequestParams params, FileAsyncHttpResponseHandler fileAsyncHttpResponseHandler){
        client.get(getAbsoluteUrl(url), params, fileAsyncHttpResponseHandler);
    }

    private static String getAbsoluteUrl(String relativeUrl) {
        return BASE_URL + relativeUrl;
    }
}
package com.penngo.http;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;

import com.loopj.android.http.FileAsyncHttpResponseHandler;
import com.loopj.android.http.RequestParams;
import com.loopj.android.http.TextHttpResponseHandler;

import org.apache.http.Header;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Locale;

public class MainActivity extends Activity {
    private final static String tag = "MainActivity-->";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Button getBtn = (Button)this.findViewById(R.id.getBtn);
        getBtn.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                testGet();
            }
        });
        Button postBtn = (Button)this.findViewById(R.id.postBtn);
        postBtn.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                testPost();
            }
        });

        Button upLoadBtn = (Button)this.findViewById(R.id.upLoadBtn);
        upLoadBtn.setOnClickListener(new View.OnClickListener(){
            public void onClick(View v){
                testUploadFile();
            }
        });

        Button downloadBtn = (Button)this.findViewById(R.id.downloadBtn);
        downloadBtn.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                testDownloadFile();
            }
        });
    }

    private void testGet(){
        HttpUtil.get("test/android.php", getParames(), responseHandler);
    }

    private RequestParams getParames(){
        RequestParams params = new RequestParams();
        params.put("user", "penngo");
        params.put("psw", "penngo");
        return params;
    }

    private TextHttpResponseHandler responseHandler =  new TextHttpResponseHandler(){
        @Override
        public void onStart() {
            Log.e(tag, "onStart====");
        }

        @Override
        public void onSuccess(int statusCode, Header[] headers, String response) {
            Log.e(tag, "onSuccess====");
            StringBuilder builder = new StringBuilder();
            for (Header h : headers) {
                String _h = String.format(Locale.US, "%s : %s", h.getName(), h.getValue());
                builder.append(_h);
                builder.append("\n");
            }
            Log.e(tag, "statusCode:" + statusCode + " headers:" + builder.toString() + " response:" + response);
        }

        @Override
        public void onFailure(int statusCode, Header[] headers, String errorResponse, Throwable e) {
            Log.e(tag, "onFailure====");
            StringBuilder builder = new StringBuilder();
            for (Header h : headers) {
                String _h = String.format(Locale.US, "%s : %s", h.getName(), h.getValue());
                builder.append(_h);
                builder.append("\n");
            }
            Log.e(tag, "statusCode:" + statusCode + " headers:" + builder.toString(), e);
        }

        @Override
        public void onRetry(int retryNo) {
            // called when request is retried
        }
    };

    private void testPost(){
        HttpUtil.post("test/android.php", getParames(), responseHandler);
    }

    private void testUploadFile(){
        RequestParams params = new RequestParams();
        try {
            InputStream is = this.getAssets().open("png/launcher.png");
            String png = this.getExternalCacheDir().getAbsolutePath() + "/launcher.png";
            File myFile = new File(png);
            Log.e(tag, "png====" + png);
            this.copyToSD(png, "png/launcher.png");
            params.put("pngFile", myFile, RequestParams.APPLICATION_OCTET_STREAM);
        } catch(Exception e) {
            Log.e(tag,"上传失败", e);
        }
        HttpUtil.post("test/android.php", params, responseHandler);
    }

    private void testDownloadFile(){
        String mp3 = this.getExternalCacheDir().getAbsolutePath() + "/fa.mp3";
        File mp3File = new File(mp3);
        FileAsyncHttpResponseHandler fileHandler = new FileAsyncHttpResponseHandler(mp3File){
            public void onSuccess(int statusCode, Header[] headers, File file){
                Log.e(tag, "onSuccess====");
                StringBuilder builder = new StringBuilder();
                for (Header h : headers) {
                    String _h = String.format(Locale.US, "%s : %s", h.getName(), h.getValue());
                    builder.append(_h);
                    builder.append("\n");
                }
                Log.e(tag, "statusCode:" + statusCode + " headers:" + builder.toString() + " file:" + file.getAbsolutePath());
            }
            public void onFailure(int statusCode, Header[] headers, Throwable throwable, File file){

            }
        };
        HttpUtil.download("test/fa.mp3", null, fileHandler);
    }
    /**
     * 复制文件到sdcard
     */
    private void copyToSD(String strOut, String srcInput) throws IOException
    {
        InputStream myInput;
        OutputStream myOutput = new FileOutputStream(strOut);
        myInput = this.getAssets().open(srcInput);
        byte[] buffer = new byte[1024];
        int length = myInput.read(buffer);
        while(length > 0)
        {
            myOutput.write(buffer, 0, length);
            length = myInput.read(buffer);
        }

        myOutput.flush();
        myInput.close();
        myOutput.close();
    }
}