android 進度條_android 檔案下載下傳及進度條顯示

android 檔案下載下傳

進度條：

ProgressDialog progress = new ProgressDialog(context);

progress.setTitle(“檔案下載下傳”);

progress.setMessage("loading...");

progress.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);

progress.setIndeterminate(false);//設定為fase等待進度更新，設定為true則左右循環滾動

progress.setMax(100);

下載下傳部分

HttpURLConnection conn = null;

URL url = null;

url = new URL(connStr);//connStr，通路路徑

conn = url.openConnection();

long size = conn.getContentLength();//檔案大小

BufferedInputStream in = new BufferedInputStream(conn.openStream());

ByteArrayOutputStream dataStream = new ByteArrayOutputStream();

BufferedOutputStream out = new BufferedOutputStream(dataStream);

int count = 0;

long total = 0L;

byte[] data = new byte[512];

while((count = in.read(data)) != -1){

total += count;

publishProgress((int)(total*100/size));//放在Asycntask裡面做進度條更新;

out.write(data,0,count);

}

out.flush();

byte[] bytes = dataStream.toByteArray();

String s = new String(bytes);//轉換成對應的類型

return s;