在android中后台加载数据
我试图做一些特定的操作，比如创建一个表，在应用程序初始启动时插入720行，这需要一些时间，所以我决定在后台运行它。请看下面的代码 MainActivity.java在android中后台加载数据,android,android-asynctask,Android,Android Asynctask,我试图做一些特定的操作，比如创建一个表，在应用程序初始启动时插入720行，这需要一些时间，所以我决定在后台运行它。请看下面的代码 MainActivity.java DatabaseHandler dbhandler = new DatabaseHandler(this); this.progressDialog = ProgressDialog.show(this, "Please wait...", "Downloading Passengers Informatio
DatabaseHandler dbhandler = new DatabaseHandler(this);
this.progressDialog = ProgressDialog.show(this, "Please wait...",
"Downloading Passengers Information...", true, false);
new DownloadTask().execute();
private class DownloadTask extends AsyncTask<String, Void, Object> {
@Override
protected Object doInBackground(String... args) {
for (int i = 1; i <= 5; i++) {
for (int j = 0; j < 11; j++) {
value = jedis.hget("passengerInfo",
String.valueOf(i + (char) (asciiA) + j)); //this will get the data from hash table passengerInfo created in Redis
if (value != null) {
addSeat = String.valueOf(i + (char) (asciiA) + j);
paxInfo = value.split(",");
passName = paxInfo[0];
passAge = Integer.parseInt(paxInfo[1]);
passGender = Integer.parseInt(paxInfo[2]);
passFoodPref = paxInfo[3];
dbhandler.addPassengerInfo(new PassengerInfo(addSeat,
passName, passAge, passGender, passFoodPref));
}
else {
addSeat = String.valueOf(i + (char) (asciiA) + j);
passName = "NA";
passAge = 0;
passGender = -1;
passFoodPref = "NA";
dbhandler.addPassengerInfo(new PassengerInfo(addSeat,
passName, passAge, passGender, passFoodPref));
}
}
}
return null;
}
@Override
protected void onPostExecute(Object result) {
// Pass the result data back to the main activity
MainActivity.this.data = result;
if (MainActivity.this.progressDialog != null) {
MainActivity.this.progressDialog.dismiss();
}
}
}
Caused by: redis.clients.jedis.exceptions.JedisConnectionException: java.net.SocketTimeoutException: Connection timed out
Caused by: java.net.SocketTimeoutException: Connection timed out