簡單實現Android檔案上傳_Android

檔案上傳在B/S應用中是一種十分常見的功能，那麼在Android平台下是否可以實現像B/S那樣的檔案上傳功能呢？答案是肯定的。下面是一個類比網站程式上傳檔案的例子。

首先建立一個Android工程，建立主啟動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"; //要上傳的本地檔案路徑 private String uploadFile = "/data/data/com.xzq/htys.mp3"; //上傳到伺服器的指定位置 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);  /* 設定mButton的onClick事件處理 */  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();   /* 允許Input、Output，不使用Cache */   con.setDoInput(true);   con.setDoOutput(true);   con.setUseCaches(false);   /* 設定傳送的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);   /* 設定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);   /* 取得檔案的FileInputStream */   FileInputStream fStream = new FileInputStream(uploadFile);   /* 設定每次寫入1024bytes */   int bufferSize = 1024;   byte[] buffer = new byte[bufferSize];   int length = -1;   /* 從檔案讀取資料到緩衝區 */   while ((length = fStream.read(buffer)) != -1){    /* 將資料寫入DataOutputStream中 */    ds.write(buffer, 0, length);   }   ds.writeBytes(end);   ds.writeBytes(Hyphens + boundary + Hyphens + end);   fStream.close();   ds.flush();   /* 取得Response內容 */   InputStream is = con.getInputStream();   int ch;   StringBuffer b = new StringBuffer();   while ((ch = is.read()) != -1){    b.append((char) ch);   }   System.out.println("上傳成功");   Toast.makeText(MainActivity.this, "上傳成功", Toast.LENGTH_LONG)     .show();   ds.close();  } catch (Exception e){   System.out.println("上傳失敗" + e.getMessage());   Toast.makeText(MainActivity.this, "上傳失敗" + e.getMessage(),     Toast.LENGTH_LONG).show();  } }}

最後別忘了在AndroidManifest.xml中設定訪問Internet的許可權：

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

以上就是本文的全部內容，希望對大家的學習有所協助，也希望大家多多支援雲棲社區。