It seems that simply using android:layout_height=”wrap_content” on your RecyclerView won’t make its height automatically expand when new items are added in it.
Android
How to start using view binding //Android Kotlin Dev Diary
First, open your app/build.gradle file Inside the android{} block of app/build.gradle, add the following: buildFeatures { viewBinding = true } Sync project with gradle files. In your activity or fragment, define the following class-wide property:
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private lateinit var binding: <strong>FragmentorActivityNameBinding</strong> |
Replace the FragmentorActivityNameBinding above with the appropriate binding class name. Tip: The binding class name is based on the […]
Disable animations programmatically during instrumented tests // Android Dev Diary
When running an instrumented Android test, or “androidTest”, and you encounter the following error: It means that you need to disable animations for it to successfully run the test. But, it can take a lot of clicks on the emulator/device screen to get to the developer settings to turn off animations! So, for a quicker […]
Two-way data binding with StateFlow & BindingAdapters //Dev Diary
I created BindingAdapters for an EditText like so: My XML layout element looks like this: And in my ViewModel, the inputAmount is set up this way:
Fix coroutine error: Cannot access database on the main thread // Android Dev Diary
As I was running a test for a ViewModel function, I encountered the following error: […] Main Thread @coroutine java.lang.IllegalStateException: Cannot access database on the main thread since it may potentially lock the UI for a long period of time. I think it may be caused by the viewModelScope from viewModelScope.launch {} being used by […]
Grant, revoke permissions via Android Studio Terminal (ADB Shell) // Android Dev Diary
To grant and revoke permissions via Terminal (ADB Shell), run your app on an emulator (I haven’t personally tried on a device but it should work there too). Open your Terminal, and then enter the following command: adb shell Once you’re in, you may use the following syntax for granting or revoking your Android device’s […]
A working shared ViewModel between parent and child Fragments //Android Kotlin Dev Diary
I initially had a problem with the shared ViewModel because the child fragments were creating a new instance from the one held by the parent fragment. The ViewModel instantiations below work for me: CreateLogFragment.kt (parent)
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class CreateLogFragment : Fragment() { private val mainViewModel: MainViewModel by activityViewModels { MainViewModel.Factory } . . . |
CreateLogFoodFragment.kt (child)
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class CreateLogFoodFragment : Fragment() { private val mainViewModel: MainViewModel by activityViewModels( null, factoryProducer = { MainViewModel.Factory }) . . . |
CreateLogNotesFragment.kt (another child)
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class CreateLogFoodFragment : Fragment() { private val mainViewModel: MainViewModel by activityViewModels( null, factoryProducer = { MainViewModel.Factory }) . . . |
by activityViewModels turned things around!
My Fave Android Studio Keyboard Shortcuts
I have been working on small Android apps, and I just want to share some of my favorite keyboard shortcuts. Some of them were manually added by me. Keyboard shortcuts are one of my must-haves for productivity as a programmer, as they let me navigate through code faster, allowing me to focus on creating new […]
val vs. const //Kotlin Android Dev Diary
Let’s start off by introducing val. To define a variable in Kotlin, you may use var or val: var val has a mutable value (changeable) has an immutable value (read-only) So we use val for immutable values, so what is the const keyword and what’s its difference from val? const val has an immutable value […]
Error: Type mismatch. Required: ActivityMainBinding. Found: ViewDataBinding! //Android Kotlin Dev Diary
The problem is that this line of code is producing an error: And the error says: Type mismatch.Required:ActivityMainBindingFound:ViewDataBinding! The solution is to add a <layout> tag in the layout file that you are inflating!