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2023年12月13日发(作者：)

Android sdk 3.0 编译通过

package ad;

import ;

import tputStream;

import ption;

import tream;

import ;

import nection;

import ProtocolException;

import ty;

import ;

import nment;

import r;

import e;

import ;

import ;

import kListener;

import ;

import ssBar;

import ew;

import ;

public class AndroidDownLoadActivity extends Activity

{

private Button DownloadTextButton = null;

private Button DownloadMp3Button = null;

ProgressBar pb;

TextView tv;

int fileSize;

int downLoadFileSize;

String fileEx, fileNa, filename;

private Handler handler = new Handler()

{

@Override

public void handleMessage(Message msg)

{// 定义一个Handler，用于处理下载线程与UI间通讯

if (!tThread().isInterrupted())

{

};

}

switch () {

case 0:

(fileSize);

case 1:

gress(downLoadFileSize);

int result = downLoadFileSize * 100 / fileSize;

t(result + "%");

break;

case 2:

xt(, "文件下载完成", 1)

.show();

break;

case -1:

String error = a().getString("error");

xt(, error, 1)

.show();

break;

}

}

Message(msg);

/*

* down load file to sdcard.

*/

public void down_file(String url, String path) throws IOException

{

// 下载函数

filename = ing(dexOf("/") + 1);

// 获取文件名

URL myURL = new URL(url);

URLConnection conn = nnection();

t();

InputStream is = utStream();

ze = tentLength();// 根据响应获取文件大小

Log.i("value", "length = " + ze);

if (ze <= 0)

{

throw new RuntimeException("无法获知文件大小 ");

}

if (is == null)

{

}

}

throw new RuntimeException("stream is null");

File file = new File(ernalStorageDirectory(),

filename);

FileOutputStream fos = new FileOutputStream(file);

// 把数据存入路径+文件名

byte buf[] = new byte[1024];

downLoadFileSize = 0;

sendMsg(0);

do

{

// 循环读取

int numread = (buf);

if (numread == -1)

{

break;

}

(buf, 0, numread);

downLoadFileSize += numread;

sendMsg(1);// 更新进度条

} while (true);

sendMsg(2);// 通知下载完成

try

{

();

} catch (Exception ex)

{

Log.e("tag", "error: " + sage(), ex);

}

private void sendMsg(int flag)

{

Message msg = new Message();

= flag;

ssage(msg);

}

/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState)

{

te(savedInstanceState);

setContentView();

}

private class DownTextButtonListener implements OnClickListener

{

public void onClick(View v)

{

te(savedInstanceState);

setContentView();

pb = (ProgressBar) findViewById(_pb);

tv = (TextView) findViewById();

new Thread()

{

public void run()

{

try

{

down_file(

}

}.start();

"下载路径 ",

"/sdcard/");

// 下载文件，参数：第一个URL，第二个存放路径

} catch (ClientProtocolException e)

{

// TODO Auto-generated catch block

tackTrace();

} catch (IOException e)

{

// TODO Auto-generated catch block

tackTrace();

}

DownloadTextButton = (Button) findViewById(xtButtonId);

lickListener(new DownTextButtonListener());

DownloadMp3Button = (Button) findViewById(3ButtonId);

lickListener(new DownMp3ButtonListener());

}

}

}

Thread thread = new Thread(new Runnable()

{

public void run()

{

// TODO Auto-generated method stub

HttpDownloader httpDownloader = new HttpDownloader();

String irc = httpDownloader

.download("下载路径 ",);

n(irc);

}

});

();

private class DownMp3ButtonListener implements OnClickListener

{

public void onClick(View v)

{

Thread thread = new Thread(new Runnable()

{

public void run()

{

// TODO Auto-generated method stub

HttpDownloader httpDownloader = new HttpDownloader();

int result = httpDownloader

.downFile(

}

}

"下载路径 ",,

"test/", "");

n(result);

}

});

();

package ad;

import edReader;

import ;

import ption;

import tream;

import treamReader;

import LConnection;

import medURLException;

import ;

import nection;

import ;

public class HttpDownloader

{

private URL url = null;

public String download(String urlStr)

{

StringBuffer sb = new StringBuffer();

String line = null;

BufferedReader buffer = null;

try

{

// 创建一个url对象

url = new URL(urlStr);

// 创建一个Http连接对象

//HttpURLConnection urlConn = (HttpURLConnection) nnection();

URLConnection urlConn = nnection();

t();

int fileSize = tentLength();// 根据响应获取文件大小

Log.d("filesize " ," **** " + fileSize);

// 使用IO流读取数据

buffer = new BufferedReader(new InputStreamReader(urlConn

}

.getInputStream()));

while ((line = ne()) != null)

{

(line);

}

} catch (Exception e)

{

tackTrace();

} finally

{

try

{

();

} catch (Exception e)

{

tackTrace();

}

}

return ng();

public int downFile(String urlStr, String path, String fileName)

{

InputStream inputStream = null;

try

{

FileUtils fileUtils = new FileUtils();

if (Exist(path + fileName))

{

return 1;

} else

{

inputStream = getInputStreamFromUrl(urlStr);

File resultFile = 2SDFromInput(path, fileName,

inputStream);

if (resultFile == null)

{

return -1;

}

} } catch (Exception e)

{

tackTrace();

return -1;

} finally

{

try

{

();

} catch (Exception e)

{

tackTrace();

}

}

return 0;

}

private InputStream getInputStreamFromUrl(String urlStr)

throws MalformedURLException, IOException

{

// TODO Auto-generated method stub

url = new URL(urlStr);

HttpURLConnection urlConn = (HttpURLConnection) nnection();

InputStream inputStream = utStream();

return inputStream;

}

}

package ad;

import ;

import tputStream;

import ption;

import tream;

import Stream;

import nment;

public class FileUtils

{

private String SDPATH;

public String getSDPATH()

{

return SDPATH;

}

public FileUtils()

{

SDPATH = ernalStorageDirectory() + "/";

}

public File createSDFile(String filename) throws IOException

{

File file = new File(SDPATH + filename);

NewFile();

return file;

}

public File createSDDir(String dirname) throws IOException

{

File file = new File(SDPATH + dirname);

();

return file;

}

public boolean isFileExist(String fileName)

{

File file = new File(SDPATH + fileName);

return ();

}

public File write2SDFromInput(String path, String fileName,

InputStream input)

{

File file = null;

OutputStream output = null;

try

{

createSDDir(path);

file = createSDFile(path + fileName);

output = new FileOutputStream(file);

byte buffer[] = new byte[4 * 1024]; while (((buffer)) != -1)

{

(buffer);

}

();

} catch (Exception e)

{

tackTrace();

} finally

{

try

{

();

} catch (Exception e)

{

tackTrace();

}

}

return file;

}

}

xmlns:android="/apk/res/android"

android:orientation="vertical"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

>

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="@string/hello"

/>

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text=""

/>

android:layout_width="fill_parent"

android:layout_height="wrap_content" android:max="100"

style="?android:attr/progressBarStyleHorizontal"

/>