Android采用async框架实现文件上传

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页面效果

需要的权限

<uses-permission android:name="android.permission.INTERNET"/>

网络访问权限;

布局文件:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    tools:context=".MainActivity" >    <EditText        android:id="@+id/et_url"        android:layout_width="match_parent"        android:layout_height="wrap_content" />    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:onClick="startUplode"        android:text="@string/hello_world" /></LinearLayout>

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;@Overrideprotected 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);// 定义上传的服务器地址String path = "http://172.22.64.193:8080/0001AndroidWebService/UplodeFileServlet";// 判断文件的大小,及是否存在if (file.exists() && file.length() > 0) {// 使用开源框架,//AsyncHttpClient client = new AsyncHttpClient();// 上传的参数RequestParams params = new RequestParams();try {// 添加上传的数据params.put("file", file);} catch (FileNotFoundException e) {// TODO Auto-generated catch blocke.printStackTrace();} // Upload a File// 发送上传的消息,..并处理结果client.post(path, params, new AsyncHttpResponseHandler() {@Overridepublic 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));}@Overridepublic 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

http://download.csdn.net/detail/u011936142/7424999

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