网络_Xutils

xUtils有四大模块：
数据库DbUtils,控件ViewUtils,网络ViewUtils,图片BitmapUtils


// get 提交

HttpUtils http = new HttpUtils();
http.send(HttpRequest.HttpMethod.GET,
    "http://www.lidroid.com",
    new RequestCallBack<String>(){
        @Override
        public void onLoading(long total, long current, boolean isUploading) {
            testTextView.setText(current + "/" + total);
        }


        @Override
        public void onSuccess(ResponseInfo<String> responseInfo) {
            textView.setText(responseInfo.result);
        }


        @Override
        public void onStart() {
        }


        @Override
        public void onFailure(HttpException error, String msg) {
        }
});

// Post 提交数据，或者上传文件

RequestParams params = new RequestParams();
params.addHeader("name", "value");
params.addQueryStringParameter("name", "value");


// 只包含字符串参数时默认使用BodyParamsEntity，
// 类似于UrlEncodedFormEntity（"application/x-www-form-urlencoded"）。
params.addBodyParameter("name", "value");


// 加入文件参数后默认使用MultipartEntity（"multipart/form-data"），
// 如需"multipart/related"，xUtils中提供的MultipartEntity支持设置subType为"related"。
// 使用params.setBodyEntity(httpEntity)可设置更多类型的HttpEntity（如：
// MultipartEntity,BodyParamsEntity,FileUploadEntity,InputStreamUploadEntity,StringEntity）。
// 例如发送json参数：params.setBodyEntity(new StringEntity(jsonStr,charset));
params.addBodyParameter("file", new File("path"));
...


HttpUtils http = new HttpUtils();
http.send(HttpRequest.HttpMethod.POST,
    "uploadUrl....",
    params,
    new RequestCallBack<String>() {


        @Override
        public void onStart() {
            testTextView.setText("conn...");
        }


        @Override
        public void onLoading(long total, long current, boolean isUploading) {
            if (isUploading) {
                testTextView.setText("upload: " + current + "/" + total);
            } else {
                testTextView.setText("reply: " + current + "/" + total);
            }
        }


        @Override
        public void onSuccess(ResponseInfo<String> responseInfo) {
            testTextView.setText("reply: " + responseInfo.result);
        }


        @Override
        public void onFailure(HttpException error, String msg) {
            testTextView.setText(error.getExceptionCode() + ":" + msg);
        }
});

// 下载文件

HttpUtils http = new HttpUtils();
HttpHandler handler = http.download("http://apache.dataguru.cn/httpcomponents/httpclient/source/httpcomponents-client-4.2.5-src.zip",
    "/sdcard/httpcomponents-client-4.2.5-src.zip",
    true, // 如果目标文件存在，接着未完成的部分继续下载。服务器不支持RANGE时将从新下载。
    true, // 如果从请求返回信息中获取到文件名，下载完成后自动重命名。
    new RequestCallBack<File>() {


        @Override
        public void onStart() {
            testTextView.setText("conn...");
        }


        @Override
        public void onLoading(long total, long current, boolean isUploading) {
            testTextView.setText(current + "/" + total);
        }


        @Override
        public void onSuccess(ResponseInfo<File> responseInfo) {
            testTextView.setText("downloaded:" + responseInfo.result.getPath());
        }




        @Override
        public void onFailure(HttpException error, String msg) {
            testTextView.setText(msg);
        }
});


...
//调用cancel()方法停止下载
handler.cancel();
...