页面效果
须要的权限
<uses-permission android:name="android.permission.INTERNET"/>
网络訪问权限;布局文件:
核心代码
package com.examp.uplodefile;import java.io.File;import java.io.FileNotFoundException;import org.apache.http.Header;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.widget.EditText;import com.loopj.android.http.AsyncHttpClient;import com.loopj.android.http.AsyncHttpResponseHandler;import com.loopj.android.http.RequestParams;public class MainActivity extends Activity { private EditText et_url; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); et_url = (EditText) findViewById(R.id.et_url); } public void startUplode(View view) { // 获取上传文件的地址 String filePath = et_url.getText().toString().trim(); // 创建出文件对象 File file = new File(filePath); // 定义上传的server地址 String path = "http://172.22.64.193:8080/0001AndroidWebService/UplodeFileServlet"; // 推断文件的大小,及是否存在 if (file.exists() && file.length() > 0) { // 使用开源框架, // AsyncHttpClient client = new AsyncHttpClient(); // 上传的參数 RequestParams params = new RequestParams(); try { // 加入上传的数据 params.put("file", file); } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } // Upload a File // 发送上传的消息,..并处理结果 client.post(path, params, new AsyncHttpResponseHandler() { @Override public void onSuccess(int statusCode, Header[] headers, byte[] responseBody) { System.out.println("==========" + statusCode); for (int i = 0; i < headers.length; i++) { System.out.println("&&&&&&" + headers[i]); } System.out.println("********" + new String(responseBody)); } @Override public void onFailure(int statusCode, Header[] headers, byte[] responseBody, Throwable error) { System.out.println("==========" + statusCode); for (int i = 0; i < headers.length; i++) { System.out.println("&&&&&&" + headers[i]); } System.out.println("********" + new String(responseBody)); System.out.println("--------" + error); } }); } }} 编写前提是将框架代码已经导入到项目中 
框架代码下载