android 로더 작성

protected String downloadApkFile(String url) {

//

String fileName = null;

URLConnection sourceUrl;

try {

//Connect to URL and gets content

sourceUrl = new URL(url).openConnection();

Object data = sourceUrl.getContent();

//find Filename

fileName = sourceUrl.toString();

fileName = fileName.substring(fileName.lastIndexOf('/') + 1);

// create/open file in the 'data/data/<app namespace>/files'

// directory

FileOutputStream fos = openFileOutput(fileName,

Context.MODE_WORLD_READABLE);

byte[] buffer = new byte[1024];

BufferedInputStream bis = new BufferedInputStream(

(InputStream) data);

int len1 = 0;

while ((len1 = bis.read(buffer)) != -1) {

fos.write(buffer, 0, len1);

}

fos.close();

bis.close();

} catch (MalformedURLException e) {

Log.i("ghi", e.getMessage());

} catch (IOException e) {

Log.i("ghi", e.getMessage());

}

return getFileStreamPath(fileName).getAbsolutePath();

}

File apkFile = new File(downloadApkFile("http://new.apk"));

Intent installIntent = new Intent(Intent.ACTION_VIEW);

installIntent.setDataAndType(Uri.fromFile(apkFile), "application/vnd.android.package-archive");

startActivity(installIntent);

// DELETE

Uri packageURI = Uri.parse("package:yourapkfullpackagename");

Intent uninstallIntent = new Intent(Intent.ACTION_DELETE, packageURI);

startActivity(uninstallIntent);