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Questions tagged [android]

Android is Google's mobile operating system, used for programming or developing digital devices (Smartphones, Tablets, Automobiles, TVs, Wear, Glass, IoT). For topics related to Android, use Android-specific tags such as android-intent, not intent, android-activity, not activity, android-adapter, ...

1,131,141 questions
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Create custom android keyboard with keys that have one charcter above another

I need help getting a custom android keyboard to have keys with one character above the other, like the stock samsung keyboard. I understand i need to use ondraw, import.graphics.x and so on, ...
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button does not appear in design view android studio

Building an android app. The idea is to open a second activity. When building get an error class interface or enum expected where it says Activity { Button button ... and also where it says void I ...
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Use getter/setter to save/access variable extracted from JSON in Android with Volley

I need stract data from a json, idVideo variable is saved in setter from Video class, then i have other method for acces with getter but the value is always null. Code from method extract data JSON: ...
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How to know when the phone connects to a WiFi network

I've been looking for a way to know when my Android smartphone connects to a WiFi network and IS READY to connect to a certain server to exchange data. I have already tried setting a broadcast ...
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React Native: blob.data undefined file access api on android

React native now supports blobs https://github.com/facebook/react-native/releases/tag/v0.54.0 I cannot make them work on Android. axios({ method: 'GET', url: imageUrl, responseType:...
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Issue to pass JSON string from fragment to adapter

I am a newbie to android Development, I was trying to implement a list view with items, by which when an item clicked it should display another list view with lists of specific items, I used JSON ...
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Read Data Structure value binded to Bluetooth LE Descriptor in Android

I am writing an android app which reads the data sent from an arm processor over BLE (with characteristics and descriptors). in the hardware part I am using the function below : tBleStatus ...
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1answer
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How to use Dagger2 in Android to inject activity objects easier?

On Android, When using Dagger2, I have to call the following line on every activities that uses apiService: @Inject public ApiService apiService; @Override protected void onCreate(Bundle ...
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Options available for cloud resource and DRM management for mobile app

As a straw man, consider a mobile car racing game (on iOS and Android). Each car could be a separate purchase. Each race track could be a separate purchase. Users could download or delete any of their ...
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Prevent flickering on camera preview update

I am using the frames that I receive from a USB camera (Using the UVCCamera library) and I apply a blur effect using RenderScript. The frame format is NV21. The blur effect created by RenderScript ...
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How to add a Linear Layout dinamically to Fragment [duplicate]

Im working with fragments and adding dinamically stuff to it. What Im trying to do is adding a relative layout inside the fragment. The relative layout has some width , height and a drawable. It ...
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2answers
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Firebase storage, cannot get download url successfully. (Android)

this is my code so far. public void getimage() { FirebaseStorage storagi = FirebaseStorage.getInstance(); StorageReference imagerefi = storagi.getReference(); userimage = (ImageView) ...
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Override not working on onNewTask() in FirebaseMessagingService

I've just installed Firebase in my Android app to enable push notifications. I confirmed it's working by sending a push notification from the Firebase console to all devices running the app. Now I'm ...
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How can i use different slot to make a call in Android Studio

need help to make an application who let me make a call with any slot for dual sim devices in android Studio .
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Ionic Image Resizer not working on Android Oreo

Recently I've been having issues using the Image Resizer plugin from Ionic 3. As the title says, it does not work on devices that run Android Oreo. I've tried on older versions, like Nougat 7.0, and ...
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scheduleAtFixedRate doesn't repeat runnable [duplicate]

It's my first attempt to create an action in activity, which should repeat periodically. My snippet looks like this private void setBackground(final ConstraintLayout mainActivityLayout) { //...
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Trying to change a state

The following code is a tool bar that has a star icon that will allow a user to favourite a song. const songFavIcon = (props) => { const { state, goBack, color, size, fetch, ...
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4answers
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Superclass and class having the same method

I have a superclass called Base, that implements two functions: protected void callSomething() { doSomething(); } protected void doSomething() { } The second class only exists because I need it....
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1answer
8 views

Freshly created ionic3 app not working on android device

I have created a new Ionic 3 app, i haven't touched it yet, it works fine on browser however when i tried to build and run it on a actual android device, the generated apk output is always "Couldn'...
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1answer
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Notifications oreo api 26 - were working perfectly, now they're not

thanks for your time. I had notifications working perfectly after implementing channels etc, but then they suddenly stopped working. I'm wondering is it the dependencies or something? Notification ...
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Create image files which don't appear in galley

I'm creating some image files from bitmaps in my android app and I don't like them to be shown in device gallery. Just like Telegram that saves images in Telegram folder but they never show up in ...
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2answers
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Android - How can I create layout as per image attached for different screens?

Android - How can I create layout as per image attached for different screens?
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Elastic data won't display properly in android

I have created an elastic index with products And every product has a Category, Sub category, Sub Sub Category. I have hardcoded name of all Category, Sub Category and Sub Sub category in my ...
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How to fix “Expecting a top level declaration” in Android studio

How do I fix the error of "Expecting a top level declaration" in Android studio activity_main
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2answers
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NullPointerException for LatLng GPS location

I am using Google Maps to obtain my current location and display a red marker on my location. So far it only the mMap.setMyLocation(true); works for my location. I am getting NullPointerException for ...
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Phonegap InAppBrowser Socket.io not working after restarting Android App

I built an Android App on build.phonegap.com Socket server: EC2 on AWS Client code: var socket; socket = io('wss://mydomain.com:3000/my-namespace', { query: userName }); Success Way 1: Socket ...
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Finding location by area code - Android Studio

Okay, I'm very basic on computer programming and even more new to Android Studio, but it's becoming a tinker time project of mine.. here is the issue. I want to build an app where someone can enter a ...
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build failed Google io 2018 (iosched)

Download the project of Google IO 2018 (iosched), try to compile it in Android Studio 3.3 Canary 7, also the probe in 3.2 RC1. But I get the following error: error: resource style/TextAppearance....
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Fresco library not loading imagi on api 26

public void LoadImageByFresco(SimpleDraweeView sdView, String url) { { try { String BASE_URL = ApiConfiguration.BASE_URL_STAGING; if (SessionManager.AppProperties....
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Xamarin Plugin Geolocator not working on Xamarin Forms android

I have installed the following nuget: Xamarin.Forms.Maps Version => 3.1.0.697729 Plugin.CurrentActivity => 2.1.0.4 Xam.Plugin.Geolocator => 4.5.0.6 Plugin.Permissions => 3.0.0.12 I have the ...
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Android Logic Based On Multiple Live Data Values

I am using the Android data binding library to make reactive views with LiveData I make a repo request for a list of jobs var jobsRequest: LiveData<Resource<List<Job>>> = ...
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Socket send buffer queue stuck in Samsung

I'm developing an Qt Android app that sends UDP audio packets every 10 ms. In some devices like Google Pixel 2 it works fine and data arrives to the server on time. However in Samsung devices like S8 ...
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4answers
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Best way to dynamically render different views in Android?

I am relatively new to Android development and I am confused on what would be the best way to dynamically render different views in Android. I have an activity that searches through a database of ...
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Error cordova build android

Tengo que hacer una modificacion a una app hibrida existente, esta construida con ionic y cordova, y la abren desde visual studio 2015. Pero al ejecutar "cordova build android", estoy obteniendo el ...
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Getting the caller ID in Android 9

I have been using the following code in a BroadcastReceiver to get the caller ID of incoming calls: @Override public void onReceive(Context aContext, Intent aIntent) { String action = aIntent....
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1answer
28 views

database created on emulator but not on device

in the following class i have created methods to create and manipulate the database package com.ashish.testquiz2; import android.content.Context; import android.database.Cursor; import android....
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1answer
25 views

LinearLayout color changing (Smooth animation)

I have a LinearLayout with an initial background (lets say : #ff4455) and I want the background color to change to another value when clicking a buttonin Smooth way (FADE) .. How to do that .. NOTE :...
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Error creating a new Native-Application (Android) in Visual Studio 2017

I just installed Visual Studio 2017 latest and included Visual c++ cross-platform for Android. The installation was successful. After installation I created a new project Native-Activity Application (...
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3answers
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Cannot return string from function Kotlin/Android Studio

I have a button that calls a function: btnRegistrationRegister.setOnClickListener { val email = etRegistrationEmail.text.toString() val password = etRegistrationPassword.text....
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Appium isn’t able to detect activities from my app

This is an issue I had using Appium from a Mac on Android. Appium isn’t able to detect activities from my app. It was detecting these fine with another version of this app, and I’ve confirmed with ...
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1answer
21 views

How to get RadioGroup checked state in Recyclerview?

Before asking this question I have searched for it, there are plenty of solutions for it but that are not what I want. I have a RecyclerView with a RadioGroup with 3 Buttons . I want to get the ...
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Which app creator would you recommend me for my project?

I am planning to create an app for my local community (I am collaborating for a disabled people "ONG" in Barcelona). The idea for my app would be a platform (with assigned users and passwords) with ...
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1answer
28 views

Button not responding when clicked

I am new to Android Programming and I wanted to make a simple app where the user would enter there name and after they click the button, it would say Hello (name of person). Also the button will ...
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1answer
39 views

Reduce space between menu items

I have the following menu: <menu xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:android="http://schemas.android.com/apk/res/android"> <item android:title="@string/...
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1answer
37 views

Refactoring of switch statement calling other functions

I've a big switch statement in my fragment class. Each case call other functions that for example download an Image and display It, or inflate a layout and show It. Is It a bad pratice? I've read that ...
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1answer
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layout_alignParentBottom to LinearLayout not showing in screen

I am making form in my application in fragment. My parent view is RelativeLayout and in that i have ScrollView and Linearlayout. Scrollview contails form and LinearLayout contains Buttons to submit ...
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1answer
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Interstitial Ad not loading

Okay this is embarrassing but I have been trying to load interstitial ad and it just does not load and I don't understand why even the logcat does not say anything. I have used the same code in two ...
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0answers
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Display dynamic text instead of 3D object in vuforia android sample after image recognition?

What I want to do is display text instead of 3D object in vuforia sample after image recognition. Like if I scan a shoe image, it should display the name of the shoe, brand and shoe details in real ...
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1answer
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Can not read any text file

First of all, I would like you to say that I am quite new here and I'm also a beginner in Android Studio and Java. My problem/question is: I have an App in Android Studio which should write a string ...
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How to only update new data from firebase android?

I new with Firebase , and also have a problem. I have RecyclerView, it does run great until I'm adding new child on the realtimedatabase. The data that I adding is accumulate or doubled. Example I ...

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