Questions tagged as 'android'

Tagged questions
1
answer

Scalability Apps

I do not have much knowledge about servers and business models for apps. Develop an app that has at the moment 9 users these enter from the android app or the web. I have a SSD VPS on ovh.com and its features are: 1 core to 2.4 Ghz 2 GB...
asked by 31.03.2018 / 22:54
0
answers

Read multiple NFC cards from android (SERIALPORT)

Hello everyone, I'm making an application on android to read NFC cards and so far all the problem is that when I want to read more than one I just can not, I'm making a serial connection with the library UsbSerialForAndroid so far I read the d...
asked by 25.04.2018 / 23:09
1
answer

I have this error when wanting to go from an Activity to a Fragment

He tells me that I should add the fragment to Manifest but he will not let me ... This is the error in the logcat E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.matias.finalcode, PID: 9941 a...
asked by 01.04.2018 / 15:59
0
answers

WebView. Verify certificates. Save data

My code is as follows: @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_web); //Activar Flecha ir atras getSupportActionBar().setDefaultDisplay...
asked by 02.05.2018 / 15:51
1
answer

Assign data to an ignore attribute in Realm

I have a RecyclerView adapter where I send a list of an object as a parameter, what I want is that when I select an item to set a boolean the selected position, I created a ignore field that is a boolean . This is the class: public class...
asked by 02.05.2018 / 17:43
1
answer

Use items from my Adapter

Hello friends, I am working on filling a recyclerview. I do this using volley, consuming a rest service, until here everything is fine, but I have to change the color of the cardview depending on a data that is sent to me from the service. How c...
asked by 02.05.2018 / 18:19
1
answer

Objects in Android do not appear in place [duplicated]

I came from java some time ago, but I felt the need to make an application on Android. The case, that when I compile my program with the Android Studio simulator, things appear hidden in the upper left corner. I searched all over the internet,...
asked by 02.04.2018 / 00:10
1
answer

How to send a value from a CustomDialog to an Activity?

In the activity_main.xml - > I have a button, which when pressed - > open a custom list view, where when you press the element 1 - > open a custom alert dialog, - > which has 2 buttons and when pressed the Button A - > it takes to...
asked by 01.04.2018 / 22:09
1
answer

Get data from the database in this way, Firebase Android

How do I obtain this data that is marked in this example, in a list. Try this code, but nothing. String cuswtId = String.valueOf (FirebaseDatabase.getInstance (). getReference (). child ("Users"). child ("Customers") Any way?     
asked by 01.04.2018 / 21:13
0
answers

Trust anchor for certification path not found

I receive the following error javax.net.ssl.SSLHandshakeException: java.security.cert.CertPathValidatorException: Trust anchor for certification path not found. This is undoubtedly given by the certificates, I used the following class to av...
asked by 02.04.2018 / 20:51