Questions tagged as 'android'

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Delete and Rebuild BD

I have a database on android, in which by means of a button or something I need the user to delete all the data, all the tables ... Absolutely everything and automatically the tables are generated again could do it? This is my SQLiteOpenHelper c...
asked by 15.12.2018 / 16:30
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What are the reasons why the Android operating system silences notifications?

I have an app in which I implement notification channels but there are certain cases that upon receiving the notification does not sound even though the device settings have not been moved.  My suspicion is that the SO automatically silences the...
asked by 14.12.2018 / 18:54
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How to restrict access in an app on android?

I am new programming so you can explain me with pears and apples and maybe add some article so you can read it would be perfect I have researched but can not find anything. I'm using XAMPP for this project The app does this: 1) Request...
asked by 12.12.2018 / 05:03
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Insert Dynamic List in RecyclerViewAdapter

I am in the process of creating an app which has some questions, these questions have a response, a list attribute of the question class. since the answers are loaded from the bd. The thing is that I'm trying to load the questions into a spinner...
asked by 12.12.2018 / 07:33
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The app stops when I click on enter

Hello, good evening, I'm trying to login but the app stops when I try to enter the username and password I guess the only thing they need is the java login class: public class Login extends AppCompatActivity { TextView tv_registrar; EditTe...
asked by 12.12.2018 / 07:40
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Android Studio - Save records of a table in an Array

For my project I have a database in which I insert 10 records to the "books" table (it has 9 fields). These 10 records I need to save them in an Array [i] and then do something with the information. For example, in Array [0] you have to bring me...
asked by 11.12.2018 / 06:02
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I need to bring a position

I have a recycler view with several cardview and I need a button to open a dialog from which I put a text and edit the textview inside the cardview inside the recycler view. I already have to be able to edit everything but I do not know how to p...
asked by 11.12.2018 / 12:00
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Problems downloading PopUp window file in Android Studio

I have an application for android, where I am using WebView to show a web page, from which to download files it shows a popup window (see image) where there are DOWNLOAD buttons to download files, but when pressing DOWNLOAD DO NOT download....
asked by 10.12.2018 / 20:50
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Android Studio Emulator with MediaRecorder Hangs

Good evening I wanted to know if someone knows about the relationship between the emulator and the class MediaRecorder since the application gets stuck when the microphone is working, try the application in a physical cell and it works co...
asked by 10.12.2018 / 01:36
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Prevent ExpandableListView from losing data when scrolling

The problem is that the elements of the submenu of the ExpandableListView are loaded as they appear on the screen, and when they are no longer displayed on the screen they lose their data because when I go back to where they are located they are...
asked by 14.12.2018 / 00:58