Android实现多线程下载文件的方法

downloadedSize += fds[i].getDownloadSize(); if (!fds[i].isFinished()) {

finished = false; }

} handler.sendEmptyMessage(0);

//线程暂停一秒 sleep(1000);

} } catch (Exception e) {

e.printStackTrace(); }

} }

} public class ThreadDownloadDemo extends Activity {

private TextView downloadurl; private EditText downloadnum;

private Button downloadbutton; private ProgressBar downloadProgressBar;

private TextView downloadinfo; private int downloadedSize = 0;

private int fileSize = 0; private long downloadtime;

@Overridepublic void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);

setContentView(R.layout.threaddemo); downloadurl = (TextView) findViewById(R.id.downloadurl);

downloadurl.setText("http://www.easck.com/201105110911/AA5CC27CBE34DEB50A194581D1300881/Special_323149/%E8%8D%B7%E5%A1%98%E6%9C%88%E8%89%B2.mp3"); downloadnum = (EditText) findViewById(R.id.downloadnum);

downloadinfo = (TextView) findViewById(R.id.downloadinfo); downloadbutton = (Button) findViewById(R.id.downloadbutton);

downloadProgressBar = (ProgressBar) findViewById(R.id.downloadProgressBar); downloadProgressBar.setVisibility(View.VISIBLE);

downloadProgressBar.setMax(100); downloadProgressBar.setProgress(0);

downloadbutton.setOnClickListener(new OnClickListener() { public void onClick(View v) {download();

downloadtime = SystemClock.currentThreadTimeMillis(); }

} );

} private void download() {// 获取SD卡目录

String dowloadDir = Environment.getExternalStorageDirectory()+ "/threaddemodownload/"; File file = new File(dowloadDir);

//创建下载目录 if (!file.exists()) {file.mkdirs();

}//读取下载线程数，如果为空，则单线程下载 int downloadTN = Integer.valueOf("".equals(downloadnum.getText().toString()) ? "1" : downloadnum.getText().toString());

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Android实现多线程下载文件的方法

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