kandi X-RAY | MyLiveData Summary
kandi X-RAY | MyLiveData Summary
MyLiveData
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Top functions reviewed by kandi - BETA
- Called when the activity is created
- Request a pojo
- Send a request to Radar station
- Init data
- Initialize when the json is clicked
- Init view
- Initializes the view
- Sets the result
- Getter for the beat event
- Method to hide loading dialog
- Display loading dialog
- Update the text
MyLiveData Key Features
MyLiveData Examples and Code Snippets
Community Discussions
Trending Discussions on MyLiveData
QUESTION
In my app, I have a ViewModel looks like that:
...ANSWER
Answered 2022-Feb-06 at 08:50I understood why myLiveData
is not populated in my test. According to the documentation "LiveData objects that are lazily calculated on demand." and LiveData#getValue
only get the value if the LiveData is already populated but doesn't calculate the value.
So I fixed my test adding a getter on my LiveData and an observer on my LiveData to force the calculation like that LiveDataUtil.getValue(myExampleViewModel.getMyLiveData());
with LiveDataUtil#getValue
:
QUESTION
I am using OkHttp library to download some data from the internet in my androidx.lifecycle.ViewModel
I then want to update my LiveData
. It seems that doing it from background thread throws exception like so:
ANSWER
Answered 2022-Jan-17 at 05:54there are many ways to do that you can simply post value to live data, using dispatcher's and handler which is running on main thread as you provide looper of main thread.
Another way is you can use high order functions to update the viewmodels which is easy to use and give it a try.
QUESTION
I have this basic Android Architecture Component use-case where I observe a live-data and update UI.
...ANSWER
Answered 2021-May-03 at 14:33You could use distinctUntilChanged, it has been added to Transformations:
QUESTION
How to start a fragment with a LiveData observer in the test scope with Robolectric
Fragment
...ANSWER
Answered 2021-Apr-17 at 11:22I took a look into your repository on github here. Here's what I've found.
Problem 1Your first problem is that you mock out a ViewModel
. So, when you simulate onResume
for your Fragment
it invokes:
QUESTION
ANSWER
Answered 2021-Mar-03 at 17:52Create 1 separate method.
QUESTION
I'm teaching myself Kotlin, based on some very old coding knowledge, so I might be missing something very obvious.
Basically, I want to adjust some LiveData slightly, every time it's returned from the Room database. The LiveData is a key value pair, and I want to make sure the key is assigned even if the requested item isn't in the database, so the LiveData is never null. I've tried a number of ways to do this -- most recently with a LiveData builder, but it tends to return null the first time, and then never updates. I think the problem I'm having (which I expected the LiveData builder to solve) is that the LiveData isn't returned from the database in time to make the adjustments.
I know I can do this with two LiveData objects -- observing the one that comes direct from the database, and then performing the adjustments before assigning it to a second variable -- but I'll be doing this with a large number of variables and there must be a cleaner way.
Here's the last thing I tried.
In ViewModel:
...ANSWER
Answered 2021-Feb-09 at 17:23I believe the recommended way to do this is through Transformations—see https://developer.android.com/codelabs/kotlin-android-training-live-data-transformations#0 for details.
That said, LiveData appears to be on the way out (Android moves fast!) and you might want to consider using https://developer.android.com/kotlin/flow instead.
QUESTION
I am trying to return LiveData from Android Room. I am having trouble returning the result as LiveData.
Here is the excerpt from Dao
...ANSWER
Answered 2021-Jan-23 at 16:24I believe the issue is with myLiveData = repository.getAllTransactions()
.
Since getAllTransactions()
returns a LiveData
, assigning repository.getAllTransactions
to a member variable is similar to registering an observer on it and the observer, in your case myLiveData
, won't be triggered or notified unless there's a change in the underlying database.
Try the following,
QUESTION
Is there a way to initialise MediatorLiveData
with an initial value?
I want to achieve something like the following:
ANSWER
Answered 2020-Dec-21 at 06:34Try the following by overriding addSource
, and post the initial value with postValue()
or setValue()
QUESTION
I'm trying to make room entity observable (extend BaseObservable) so it could be used in LiveData with bi-directional binding. So I have this data class:
...ANSWER
Answered 2020-Nov-10 at 13:48Answering my own question... So my question was missing one important detail - in my model class I had second constructor which was not annotated with @Ignore so Android Room was complaining " Room cannot pick a constructor since multiple constructors are suitable. Try to annotate unwanted constructors with @Ignore."
BUT(!) the error was shown ONLY for the class in Java, not in Kotlin for some strange reason.
So in Java I had this class:
QUESTION
I am working on a android project with MVVM structure. I want to use LiveData as recommended.
In the samples there are always just simple objecttypes e.g. String.
But I want to put an more complex/nested objecttype into LiveData.
For example an objectstructure like this:
ANSWER
Answered 2020-Oct-20 at 14:07The issue is from the way you create your ViewModel. You can't directly instantiate it. If you use fragment-ktx artifact you can do like that :
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install MyLiveData
You can use MyLiveData like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the MyLiveData component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .
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