Questions tagged as 'android'

Tagged questions
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Problem does not work setOnChildClickListener in ExpandableListView

I have an ExpandebleListView as a menu in a navigationDrawer, I need to add event listenes to the child items, however I do exercise for each parent and child group, in the parent groups you can get the position with setOnGroupClickListener fo...
asked by 27.10.2017 / 17:42
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how can I increase the degrade android

I want to increase the degrade so that the target is closer to the middle, how can I do it? <item> <shape> <gradient android:angle="0" android:endColor="#E8E8E8" android:st...
asked by 06.06.2018 / 14:58
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List Order

My query is as follows: I have a list of objects where each one receives a latitude and longitude. Using a CustomAdapter I show the objects and with a method I calculate the distance between my position and that of the list to show how many kilo...
asked by 23.11.2017 / 14:06
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How to leave a service running in the background on Android by closing the application that starts it

From an Android application I create and execute a service that runs on a thread and runs in the background, but when the main application is completely closed, the service also dies. The thread I think I declare as Daemon but still "kill" th...
asked by 25.05.2017 / 13:39
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Find a character that is not a space or a letter, including accents and diacritics of Spanish

I want to include the space and only accept letters, numbers and accents and the special character > ñ . What I have done is the following: if (primernombre.length() == 0 || a.matches(".*[^a-zñáéíóúA-ZÑÁÉÍÓÚ].*")) { primerno...
asked by 04.01.2017 / 16:12
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Android: NullPointerException in .getIntent (). getExtras ()

I'm in an android class project and I have it almost finished but I need to pass some variables from one activity to another, it gives me NullPointerException and looking for I have not found anything.    Logcat       Caused by: java.lang.Nu...
asked by 11.01.2018 / 19:32
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Initialize SharedPreferences from a class that does not extend from activity

I am trying to get an app to start automatically when the device is turned on as long as the user wants. To do this, I save the value of a variable using SharedPreference . The problem is that for this I use Read and Save methods, that bei...
asked by 25.07.2017 / 08:21
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Various ProgressDialog in recursive request using Volley and AsyncTask

Hi, I'm doing request using the library Volley to API to get many records approximately 8,000 and save them in BD . The response of API brings a parameter count with the total of the objects and...
asked by 29.01.2016 / 01:34
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XML parsing error: duplicate attribute

Why this 'error'? I do not have any duplicate attributes. What is the solution? MESSAGE ERROR activity_commerce.xml <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/r...
asked by 08.02.2016 / 13:57
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Load an Image from the Android Gallery

I click on the image and it lets me select one from the gallery, but when I select it, it does not change. I know I'm missing part of the code, could someone help me with it? Thanks! MainActivity: public class MainActivity extends AppCompat...
asked by 30.12.2016 / 17:54