Android研究

Java代码 
 
1、Android从网上下载文件
Java代码 
URL url=null; 
    try { 
        url = new URL("http://192.168.1.100/Test/111.mp3"); 
        HttpURLConnection urlConn = (HttpURLConnection) url 
                .openConnection(); 
        BufferedInputStream bis = new BufferedInputStream(urlConn 
                .getInputStream()); 
 
        FileOutputStream fos = new FileOutputStream( 
                Environment.getExternalStorageDirectory().getName()+ 
                "\\music\\6.mp3"); 
 
        BufferedOutputStream bos = new BufferedOutputStream(fos); 
 
        byte[] buf = new byte[3 * 1024]; 
 
        int result = bis.read(buf); 
 
        while (result != -1) { 
            bos.write(buf, 0, result); 
            result = bis.read(buf); 
        } 
        bos.flush(); 
        bis.close(); 
        fos.close(); 
        bos.close(); 
    } catch (MalformedURLException e) { 
        e.printStackTrace(); 
    } catch (IOException e) { 
        e.printStackTrace(); 
    } 

Xml代码 
<uses-permission android:name="android.permission.INTERNET"/><!--访问网络--> 

Xml代码 
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/><!--访问sd卡--> 

2、android实现多线程
Java代码 
package cd.edu.app; 
 
import android.app.Activity; 
import android.os.Bundle; 
import android.os.HandlerThread; 
import android.os.Message; 
import cn.edu.subclass.MyHandler; 
 
public class AndroidThreadActivity extends Activity {