I'm triying to do a task with an Asynctask in android.
class GetItemNames extends AsyncTask<CosmeConnection, String, String> {
@Override
protected void onPreExecute() {
super.onPreExecute();
}
@Override
protected String doInBackground(CosmeConnection... cosme) {
ContentValues cv;
cosme[0].orderListOfNames();
while(!(cosme[0].getState() == CosmeStates.RECEIVED_LIST_OF_NAMES)){}
DBHandler dbHandler = new DBHandler(getApplicationContext());
SQLiteDatabase db = dbHandler.getReadableDatabase();
if(db != null){
db.delete(DBHandler.TABLE_SERVER_ITEM, null, null);
String[] nombres = cosme[0].getExistingNames().getListOfNames().toString().replaceAll("[\\[\\]]", "").split(",");
for (String str : nombres){
cv = new ContentValues();
cv.put(DBHandler.SERVER_ITEM_NAME, str);
cv.put(DBHandler.SERVER_ITEM_NAME, "N");
try{
db.insert(DBHandler.TABLE_SERVER_ITEM, null, cv);
}catch (Exception e){
e.printStackTrace();
}
}
}
db.close();
dbHandler.close();
return null;
}
@Override
protected void onProgressUpdate(String... progress) {
}
@Override
protected void onPostExecute(String result) {
}
}
I'm launching this asyncktask like this:
new GetItemNames().execute(cosme, null, null);
I want to show a dialog wiht the message "obtaining lis of names from server" while doInBackGround() is running. I tried to do in this way:
protected void onProgressUpdate(String... progress) {
String title = getString(R.string.received_list_of_names_title);
String msg = getString(R.string.received_list_of_names_msg);
DialogHelper.getAlertDialog(getApplicationContext(), title, msg);
}
DialogHelper is just a class that manage dialogs, getAlertDialog() mehots is showing an normal alert dialog with a title and a message.
But this is nor working, i can't figure how to show a dialog that opens automaticlly and close when "doInBackGround()" has finished.
How can i do this?
Thanks a lot!
EDIT: after try the suggestion i have this exception:
09-21 14:07:21.966: E/AndroidRuntime(22016): FATAL EXCEPTION: main
09-21 14:07:21.966: E/AndroidRuntime(22016): Process: tfc.unizar.blasmobile, PID: 22016
09-21 14:07:21.966: E/AndroidRuntime(22016): android.view.WindowManager$BadTokenException: Unable to add window -- token null is not for an application
09-21 14:07:21.966: E/AndroidRuntime(22016): at android.view.ViewRootImpl.setView(ViewRootImpl.java:643)
09-21 14:07:21.966: E/AndroidRuntime(22016): at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:261)
09-21 14:07:21.966: E/AndroidRuntime(22016): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:69)
09-21 14:07:21.966: E/AndroidRuntime(22016): at android.app.Dialog.show(Dialog.java:286)
09-21 14:07:21.966: E/AndroidRuntime(22016): at tfc.unizar.blasmobile.BagContent$GetItemNames.onPreExecute(BagContent.java:263)
09-21 14:07:21.966: E/AndroidRuntime(22016): at android.os.AsyncTask.executeOnExecutor(AsyncTask.java:587)
09-21 14:07:21.966: E/AndroidRuntime(22016): at android.os.AsyncTask.execute(AsyncTask.java:535)
09-21 14:07:21.966: E/AndroidRuntime(22016): at tfc.unizar.blasmobile.BagContent.onOptionsItemSelected(BagContent.java:133)
09-21 14:07:21.966: E/AndroidRuntime(22016): at android.app.Activity.onMenuItemSelected(Activity.java:2633)
09-21 14:07:21.966: E/AndroidRuntime(22016): at com.android.internal.policy.impl.PhoneWindow.onMenuItemSelected(PhoneWindow.java:1040)
09-21 14:07:21.966: E/AndroidRuntime(22016): at com.android.internal.view.menu.MenuBuilder.dispatchMenuItemSelected(MenuBuilder.java:735)
09-21 14:07:21.966: E/AndroidRuntime(22016): at com.android.internal.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:152)
09-21 14:07:21.966: E/AndroidRuntime(22016): at com.android.internal.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:874)
09-21 14:07:21.966: E/AndroidRuntime(22016): at com.android.internal.view.menu.MenuPopupHelper.onItemClick(MenuPopupHelper.java:184)
09-21 14:07:21.966: E/AndroidRuntime(22016): at android.widget.AdapterView.performItemClick(AdapterView.java:299)
09-21 14:07:21.966: E/AndroidRuntime(22016): at android.widget.AbsListView.performItemClick(AbsListView.java:1152)
09-21 14:07:21.966: E/AndroidRuntime(22016): at android.widget.AbsListView$PerformClick.run(AbsListView.java:3014)
09-21 14:07:21.966: E/AndroidRuntime(22016): at android.widget.AbsListView$3.run(AbsListView.java:3865)
09-21 14:07:21.966: E/AndroidRuntime(22016): at android.os.Handler.handleCallback(Handler.java:808)
09-21 14:07:21.966: E/AndroidRuntime(22016): at android.os.Handler.dispatchMessage(Handler.java:103)
09-21 14:07:21.966: E/AndroidRuntime(22016): at android.os.Looper.loop(Looper.java:193)
09-21 14:07:21.966: E/AndroidRuntime(22016): at android.app.ActivityThread.main(ActivityThread.java:5296)
09-21 14:07:21.966: E/AndroidRuntime(22016): at java.lang.reflect.Method.invokeNative(Native Method)
09-21 14:07:21.966: E/AndroidRuntime(22016): at java.lang.reflect.Method.invoke(Method.java:515)
09-21 14:07:21.966: E/AndroidRuntime(22016): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:824)
09-21 14:07:21.966: E/AndroidRuntime(22016): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:640)
09-21 14:07:21.966: E/AndroidRuntime(22016): at dalvik.system.NativeStart.main(Native Method)
The application is closed by force after this. Any suggestion?
private ProgressDialog mProgress;
@Override
protected void onPreExecute(){
super.onPreExecute();
mProgress = new ProgressDialog(yourContext);
mProgress.setMessage("Obtaining list of names from server...");
mProgress.show();
}
@Override
protected void onPostExecute(String result){
super.onPostExecute(result);
mProgress.dismiss();
}