Questions tagged as 'android'

Tagged questions
2
answers

Differences between ReciclerView and ListView

I am developing a app in android . I have integrated the sdk de twitter , and it offers me 2 options to show a timeline, by ReciclerView or by ListView .    The problem is that I do not know what is the differe...
asked by 27.03.2018 / 11:15
4
answers

I can not see anything on the design screen. (Android Studio)

I just started with Android Studio and it gives me nothing but problems. In principle when I create a basic activity project, everything seems to be going well. but when I enter the graphic part of the design screen I see this and I do not see a...
asked by 13.06.2018 / 16:30
2
answers

Show image in listview from url with Android Studio

public class MainActivity extends AppCompatActivity { ListView lista; ArrayList imagen=new ArrayList(); ArrayList posicion=new ArrayList(); ArrayList hora=new ArrayList(); @Override protected void onCreate(Bundle savedInstan...
asked by 09.03.2018 / 10:19
2
answers

How can I validate if a file exists or not?

I have a problem when doing a validation to see if a file exists or not, the problem is that in the validation it always shows me that the file does not exist, when I close the application or change of activity and return to my activity where I...
asked by 12.03.2018 / 18:33
1
answer

The 'X' method could not be found in the 'Z' activity

When I run my code I get an alert that the program stopped. The code is about a motorcycle rental app. That I have to calculate the rental price per day: public class MainActivity extends Activity { private RadioButton radio0,radio1,radio...
asked by 10.05.2018 / 14:21
2
answers

Android Fragments bundle getArguments () returns null

I try to pass an arraylist (which is not empty) from one fragment to another. This is the code in which I try to pass through the arguments: Instalaciones_fragment itf = new Instalaciones_fragment(); Bundle bundle = new Bundle();...
asked by 14.05.2018 / 13:45
1
answer

Gallery full screen images

Good morning everyone. I wanted to show a gallery of images that occupy the whole screen, and I saw the option of viewFlipper. The code works perfectly, but it takes a long time to load when the images to be displayed exceed 5. How can I o...
asked by 29.10.2017 / 20:03
2
answers

Image in Drawable Get route URI Android

I would like to be able to put an "x" image by hand in the Drawable folder of android and be able to obtain the Uri route of that image, so that I can then do Img.setImageURI(aca quisiera la Uri de esa imagen que agrege a la carpeta Drwable)...
asked by 26.10.2017 / 15:03
2
answers

Error WindowLeaked when displaying a Dialog

Performing some tests to display a custom dialog box of class Dialog , you are throwing me an error of type " android.view.WindowLeaked " when you rotate the screen when it is displayed. From what I have read on the Internet it is an...
asked by 01.03.2018 / 12:04
1
answer

SQLSTATE error [23000] when trying to add a new item to my BD through my api

I am developing a API with slim framework 3 that connects to a local database. The problem is the following, when I try to insert a new element, it throws the following error {"error": {"text": SQLSTATE[23000]: Integrity constr...
asked by 14.02.2018 / 15:48