Android 实现文件上传功能，android文件上传,文件上传在B/S应用中是

Android 实现文件上传功能，android文件上传,文件上传在B/S应用中是

文件上传在B/S应用中是一种十分常见的功能，那么在Android平台下是否可以实现像B/S那样的文件上传功能呢？答案是肯定的。下面是一个模拟网站程序上传文件的例子。这里只写出了Android部分的代码，服务器的代码没有贴出来，有需要完整上传功能代码的朋友可以跟我联系哟…

首先新建一个Android工程，新建主启动Activity：

MainActivity.java：

package com.xzq.upload;

import java.io.DataOutputStream;

import java.io.FileInputStream;

import java.io.InputStream;

import java.net.HttpURLConnection;

import java.net.URL;

import android.app.Activity;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.TextView;

import android.widget.Toast;

public class MainActivity extends Activity

{

private String newName = "htys.mp3";

//要上传的本地文件路径

private String uploadFile = "/data/data/com.xzq/htys.mp3";

//上传到服务器的指定位置

private String actionUrl = "http://192.168.100.100:8080/upload/upload.jsp";

private TextView mTextView1;

private TextView mTextView2;

private Button mButton1;

@Override

public void onCreate(Bundle savedInstanceState)

{

super.onCreate(savedInstanceState);setContentView(R.layout.main);mTextView1 = (TextView) findViewById(R.id.myText2); mTextView1.setText("FilePath：/n" + uploadFile);mTextView2 = (TextView) findViewById(R.id.myText3); mTextView2.setText("UploadPath：/n" + actionUrl); /* 设定mButton的onClick事件处理 */mButton1 = (Button) findViewById(R.id.myButton);mButton1.setOnClickListener(new View.OnClickListener() {  public void onClick(View v)   {     uploadFile();   } });

}

private void uploadFile()

{

 String end = "/r/n"; String Hyphens = "--"; String boundary = "*****";try {  URL url = new URL(actionUrl);   HttpURLConnection con = (HttpURLConnection) url.openConnection();   /* 允许Input、Output，不使用Cache */  con.setDoInput(true);  con.setDoOutput(true);  con.setUseCaches(false);   /* 设定传送的method=POST */   con.setRequestMethod("POST");   /* setRequestProperty */   con.setRequestProperty("Connection", "Keep-Alive");   con.setRequestProperty("Charset", "UTF-8");   con.setRequestProperty("Content-Type",       "multipart/form-data;boundary=" + boundary);   /* 设定DataOutputStream */  DataOutputStream ds = new DataOutputStream(con.getOutputStream());   ds.writeBytes(Hyphens + boundary + end);   ds.writeBytes("Content-Disposition: form-data; "       + "name=/"file1/";filename=/"" + newName + "/"" + end);   ds.writeBytes(end);   /* 取得文件的FileInputStream */  FileInputStream fStream = new FileInputStream(uploadFile);   /* 设定每次写入1024bytes */  int bufferSize = 1024;  byte[] buffer = new byte[bufferSize];  int length = -1;   /* 从文件读取数据到缓冲区 */  while ((length = fStream.read(buffer)) != -1)   {     /* 将数据写入DataOutputStream中 */     ds.write(buffer, 0, length);   }   ds.writeBytes(end);   ds.writeBytes(Hyphens + boundary + Hyphens + end);   fStream.close();   ds.flush();   /* 取得Response内容 */   InputStream is = con.getInputStream();  int ch;  StringBuffer b = new StringBuffer();  while ((ch = is.read()) != -1)   {    b.append((char) ch);   }  System.out.println("上传成功");  Toast.makeText(MainActivity.this, "上传成功", Toast.LENGTH_LONG)       .show();   ds.close();} catch (Exception e) {  System.out.println("上传失败" + e.getMessage());  Toast.makeText(MainActivity.this, "上传失败" + e.getMessage(),      Toast.LENGTH_LONG).show(); }

}

}

最后别忘了在AndroidManifest.xml中设置访问Internet的权限：

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