Questions tagged as 'android'

Tagged questions
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What level of encapsulation do the attributes of the classes in which the logic of an activity in Android have been programmed?

I'm new to programming for Android in Java, I've been watching one or two tutorials to learn. I know that each activity is composed of an .xml file that describes the components that the activity will have and a class in Java where the logic of...
asked by 16.11.2018 / 17:28
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Passing the text of a Button from one Activity to another Activity

First of all forgive my ignorance, I've been learning to program for Android for 2 days and I'm missing something. As the title says try to pass the text of a button from one activity to another The code of the first activity: private Bu...
asked by 10.11.2018 / 11:59
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How to get path of a file through the URI in android?

To select a file I open a file chooser using an Intent: private void showFileChooser() { Intent intent = new Intent(Intent.ACTION_GET_CONTENT); intent.setType("*/*"); intent.addCategory(Intent.CATEGORY_OPENABLE); try {...
asked by 11.11.2018 / 21:12
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How do I get data that does not repeat from Firebase in Android Studio?

Hi, I have a problem with Firebase, I'm creating an app that is like a data capture application where the user clicks on YES or NO and I have to make a statistical chart of how many of them have SI in different fields such as Comment, Plane ,etc...
asked by 11.11.2018 / 21:02
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Error connecting Firebase to Android app

I'm trying to implement Firebase in my Android app but I can not get it to work. I tell you the steps that I have followed I've registered with firebase I have created a project in firebase In the application folder of my application I h...
asked by 10.11.2018 / 18:09
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Flutter: I can not select with the radio button

Hi, I'm new to flutter, I have a questionnaire with alternatives, when I load the first question with its alternatives it lets me select, I go to the second question and it goes well, but when I return to the previous question it does not let me...
asked by 10.11.2018 / 20:33
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I can not restore backup of BD sqlite

Hello, I created a section in my app to make a backup copy of one of the important databases of the app. The point is that my code only creates a .sqlite database but it turns out that 2 more files are automatically generated. Sqlite-wal and .sq...
asked by 09.11.2018 / 23:12
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The RequestQueue returns null

Well I have a code on Android that should be connected to a Web Service, but I can not connect and the truth is that I do not know why. I have started the RequestQueue requestqueue=Volley.newRequestQueue(this); but it gives me null and I...
asked by 09.11.2018 / 23:56
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How to identify when there is movement in the camera?

What I want is for the camera to detect movement (without showing any image) when a person passes in front of it and do some action (in this case that action is to make a noise to get the attention of the person passing by of the camera), I woul...
asked by 10.11.2018 / 03:00
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(Android) Activate several Radiobuttons from different RadioGroups by just swiping their finger, without the need to click on them

These radiobuttons are added in a listview (dynamic), and I want to activate several raddiobutons just by running my finger through them. If the answer is by design, it would be better.     
asked by 10.11.2018 / 04:43