Amigo recomendo vc usar o Download Manager. Com poucas linhas de código vc consegue fazer o download, ter uma notificação e ainda ter o progress do download.
Em 16 de set de 2017 1:14 PM, "Willian do Amor" <willsazon@gmail.com> escreveu:
--Tenho o seguinte código para fazer download de um arquivo
private static final String TAG = "DownloadUpdateAsyncTask";
private int NOTIFICATION_ID = 1;
private HttpURLConnection httpURLConnection;
private InputStream input;
private OutputStream output;
@Override
protected Boolean doInBackground(String... params) {
boolean sucesso;
try {
sucesso = baixarAtualizacao(params[0], params[1], params[2]);
} catch (Exception e) {
return null;
}
return sucesso;
}
@Override
protected void onPostExecute(Boolean result) {
super.onPostExecute(result);
try {
if (result != null) {
if (result) {
/*terminando o download remove a notificacao*/
notificationManager.cancel(NOTIFICATION_ID );
sha1sumLocal = AndroidUtils.getHash(fileDestino );
Log.i(TAG, "sha1sum local: " + sha1sumLocal + " | sha1sum remota: " + sha1sum);
/*Valida o checksum do arquivo para saber se o download
*terminou*/
if (sha1sum.equalsIgnoreCase(sha1sumLocal )) {
Log.i(TAG, "MD5 do arquivo OK! ");
sendNotificationUpdate(DownloadUpdateTaskService .this, android.R.drawable.stat_sys_download_done , DownloadUpdateTaskService.this. getString(R.string.app_name),
DownloadUpdateTaskService.this. getString(R.string.download_notification_install_tittle ), DownloadUpdateTaskService.this. getString(R.string.download_notification_install_message ),
NOTIFICATION_ID, true, fileDestino.getAbsolutePath());
} else {
if (fileDestino.exists()) {
fileDestino.delete();
}
}
} else {
sendNotificationUpdate(DownloadUpdateTaskService .this, android.R.drawable.stat_sys_download_done , DownloadUpdateTaskService.this. getString(R.string.app_name),
DownloadUpdateTaskService.this. getString(R.string.download_notification_install_tittle ), DownloadUpdateTaskService.this. getString(R.string.download_notification_falha ),
NOTIFICATION_ID, false, "");
}
}
} catch (Exception e) {
Log.e(TAG, "onPostExecute - Erro ao fazer download " + e);
sendNotificationUpdate(DownloadUpdateTaskService .this, android.R.drawable.stat_sys_download_done , DownloadUpdateTaskService.this. getString(R.string.app_name),
DownloadUpdateTaskService.this. getString(R.string.download_notification_install_tittle ), DownloadUpdateTaskService.this. getString(R.string.download_notification_falha ),
NOTIFICATION_ID, false, e.toString());
}
}
/*Faz o download do arquivo */
private boolean baixarAtualizacao(String url, String hash, String local) {
urlDownload = url;
sha1sum = hash;
destino = local;
try {
Log.i(TAG, "urlDownload - " + urlDownload);
URL urlOrigem = new URL(urlDownload);
/**/
int slashIndex = urlOrigem.getFile().lastIndexOf ('/');
/**/
String fileName = urlOrigem.getFile().substring(slashIndex + 1);
/**/
fileDestino = new File(destino, fileName);
new File(destino).mkdirs();
/**Conectar a URL de destino*/
URLConnection connect = urlOrigem.openConnection();
/*Pega o tamanho do arquivo*/
int lenghtOfFile = connect.getContentLength();
httpURLConnection = (HttpURLConnection) connect;
httpURLConnection.setConnectTimeout (getConnectionTimeout());
httpURLConnection.setReadTimeout (getReaderTimeout());
httpURLConnection.connect();
/*Realiza o Download do arquivo*/
input = new BufferedInputStream(httpURLConnection .getInputStream());
output = new FileOutputStream(fileDestino);
byte data[] = new byte[1024];
int countRead;
int progress = 0;
int percent = 0;
while (!isCancelled() && (countRead = input.read(data)) != -1) {
/*Verifica se a task nao foi cancelada*/
if (isCancelled()) {
input.close();
}
progress += countRead;
percent = (int) ((progress * 100) / lenghtOfFile);
/*Grava os bytes recebidos do arquivo no dispositivo*/
Log.i(TAG, "Download... " + percent);
output.write(data, 0, countRead);
if (!isCancelled()) {
showNotification(lenghtOfFile, progress, percent, DownloadUpdateTaskService.this. getString(R.string.app_name), DownloadUpdateTaskService.this. getString(R.string.download_notification_download_progress ));
}
}
output.flush();
output.close();
input.close();
Log.i(TAG, "Download do arquivo completo! ");
return true;
} catch (Exception e) {
if (fileDestino.exists()) {
fileDestino.delete();
}
input = null;
output = null;
Log.e(TAG, "Falha no download do arquivo de atualização!", e);
return false;
} finally {
try {
if (httpURLConnection != null) {
httpURLConnection.disconnect();
}
} catch (Exception e) {
Log.e(TAG, "Erro ao fechar arquivo output " + e.getMessage());
}
}/*Finnaly*/
}
//
private void showNotification(int lenghtOfFile, int progresso, int porcentagem, CharSequence ticket, CharSequence contentText) {
/*Cria uma notificacao para informar ao usuario
do andamento do download*/
Intent notificationIntent = new Intent();
notificationIntent.setAction(Intent .ACTION_VIEW);
/*Cria a pending intent*/
PendingIntent contetIntent = PendingIntent.getActivity(DownloadUpdateTaskService .this, 0, notificationIntent, 0);
/*Cria o remote view*/
RemoteViews remoteViews = new RemoteViews(DownloadUpdateTaskService .this.getPackageName(), R.layout.notification_download_media );
remoteViews.setTextViewText(R.id .notification_title, DownloadUpdateTaskService.this. getString(R.string.download_notification_download_progress ));
remoteViews.setProgressBar(R.id .notification_progress, lenghtOfFile, 1, false);
/*Atualiza a porcentagem do download na notificacao*/
remoteViews.setProgressBar(R.id .notification_progress, lenghtOfFile, progresso, false);
remoteViews.setTextViewText(R.id .notification_porcentagem, porcentagem + "%");
//Configura a notificacao
Notification notification = new NotificationCompat.Builder(DownloadUpdateTaskService .this)
//.setLargeIcon(BitmapFactory.decodeResource( DownloadUpdateTaskService. this.getResources(), android.R.drawable.stat_sys_ download))
.setSmallIcon(android.R.drawable .stat_sys_download)
.setContentTitle(DownloadUpdateTaskService .this.getString(R.string .app_name))
.setTicker(ticket)
.setContentText(contentText)
.setWhen(System.currentTimeMillis ())
.setContentIntent(contetIntent)
.setContent(remoteViews)
.build();
notification.flags = Notification.FLAG_AUTO_CANCEL;
notification.flags = notification.flags | Notification.FLAG_ONGOING_EVENT ;
/*Inicia o servico em primeiro plano*/
startForeground(NOTIFICATION_ID , notification);
}
/*Atualiza a notificacao*/
public void sendNotificationUpdate(Context context, int icon, CharSequence ticketText, CharSequence title, CharSequence text, int notifyID, boolean vibrate, String dstFile) {
String ns = Context.NOTIFICATION_SERVICE;
NotificationManager notificationManager = (NotificationManager) DownloadUpdateTaskService.this. getSystemService(ns);
long when = System.currentTimeMillis();
Intent notificationIntent = new Intent(context, InstallUpdateIntent.class);
notificationIntent.putExtra("dstFile" , dstFile);
PendingIntent contIntent = PendingIntent.getActivity(context , 0, notificationIntent, 0);
Notification notification = new NotificationCompat.Builder(context )
.setSmallIcon(icon)
.setContentTitle(title)
.setContentText(text)
.setTicker(ticketText)
.setContentIntent(contIntent)
.setWhen(when)
.build();
if (vibrate) {
notification.defaults = Notification.DEFAULT_VIBRATE;
}
notification.flags = Notification.FLAG_AUTO_CANCEL;
notificationManager.notify(notifyID , notification);
}
}/*Fim da classe DownloadUpdateTaskService*/O código funciona e o download e realizado normalmente.O problema acontece quando eu clica na notificação para ver o andamento do download.Quando tento expandir a notificação trava o aplicativo e chega a travar até o celular.Alguém sabe o que estou fazendo de errado?
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