1 初始化

调用示例：

QALHttpRequest.init();

2 设置cache大小

设置Http的缓存大小，缓存get请求的结果。空闲空间不足时将通过LRU淘汰数据。参数size为缓存大小，单位为字节，填0表示关闭Cache.
调用示例：

QALHttpRequest.setCacheMaxSize(10*1024*1024);

3 发送请求

GET调用示例：

QALHttpRequest request = new QALHttpRequest("http://www.qq.com");
request.setRequestMethod(http.GET);
request.setContentType("text/html");            
Log.i(TAG,"request:" + url );
request.request(new QALHttpValueCallBack(){                        
    @Override
    public void onFailed(int arg0, String arg1) {
        // TODO Auto-generated method stub
        Log.e(TAG,"http request error:" + arg0 +":" + arg1);
    }

    @Override
    public void onFinished(QALHttpResponse arg0) {
        // TODO Auto-generated method stub                                    
       Log.i(TAG,"http rsp status:" +  arg0.getStatus() +"|len:" + arg0.getBody().length  +"|costTime:" + use_time );
    }

});

POST调用示例：

String url = "http://stat.m.jd.com/stat/access";
QALHttpRequest request = new QALHttpRequest(url);
request.setRequestMethod(http.POST);
request.setContentType("text/html");    
Map<String,String> formData = new HashMap<String,String>();
formData.put("key1", "value1");
formData.put("key2", "value2");
request.setFormData("charset=utf-8", formData);

final long startTime = System.currentTimeMillis();
request.request(new QALHttpValueCallBack(){

    @Override
    public void onFailed(int arg0, String arg1) {
        // TODO Auto-generated method stub
        Log.e(TAG,"http request error:" + arg0 +":" + arg1);
    }

    @Override
    public void onFinished(QALHttpResponse arg0) {
        // TODO Auto-generated method stub
        long use_time = System.currentTimeMillis() - startTime;
        Log.d(TAG,"http rsp status:" +  arg0.getStatus() +"|len:" + arg0.getBody().length  +"|costTime:" + use_time );
    }
});

4 错误码