android-jetpack

Before trying the Navigation component I used to manually do fragment transactions and used the fragment tag in order to fetch the current fragment. val fragment:MyFragment = supportFragmentManager.findFragmentByTag(tag):MyFragment Now in my main activity layout I have something like: <fragment android:layout_width="match_parent" android:layout_height="match_parent" android:id="@+id/nav_host" app:navGraph= "@navigation/nav_item" android:name="androidx.navigation.fragment.NavHostFragment" app:defaultNavHost= "true" /> How can I retrieve the current displayed fragment by the Navigation component

I been struggling a lot thinking about where to place Android Services in the new Android recommended Architecture . I came up with many possible solutions, but I cannot make up my mind about which one is the best approach. I did a lot of research, and I couldn't find any useful guideline nor tutorial. The only hint I found about where to place the Service in my app architecture is this one, from @JoseAlcerreca Medium post Ideally, ViewModels shouldn’t know anything about Android. This improves testability, leak safety and modularity. A general rule of thumb is to make sure there are no

I'm trying the jetpack navigation and can't show the navigation back button when I move to a new fragment. NavigationActivity.kt class NavActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_navigation) val toolbar = findViewById<Toolbar>(R.id.toolbar) setSupportActionBar(toolbar) val host: NavHostFragment = supportFragmentManager .findFragmentById(R.id.navigation_graph) as NavHostFragment? ?: return // Set up Navigation val navController = host.navController setupActionBarWithNavController

I want to capture photos with fixed resolution (i.e. 1200x1600 ) using CameraX library. So according to documentation I can set target resolution for ImageCaptureConfig : val imageCaptureConfig = ImageCaptureConfig.Builder() .setLensFacing(CameraX.LensFacing.BACK) .setCaptureMode(ImageCapture.CaptureMode.MAX_QUALITY) .setTargetResolution(Size(1200, 1600)) .setTargetAspectRatio(Rational(3,4)) .build() Documentation describes setTargetResolution method as follows: Sets the intended output target resolution. The target resolution attempts to establish a minimum bound for the image resolution. The

I have been messing with the Jetpack Navigation component, and I created an activity that uses a navigation drawer. class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) val navigationController = findNavController(R.id.navigationHostFragment) navigationView.setupWithNavController(navigationController) val appBarConfiguration = AppBarConfiguration(TOP_LEVEL_DESTINATIONS, drawerLayout) toolbar.setupWithNavController(navigationController, appBarConfiguration) } override fun

I'm trying to implement the new Android Navigation Component in an existing app. I have 2 fragments that are identical except for their name. When I set the startDestination to fragment2, the fragment seems to be shown correctly. When the startDestination is set to fragment1, I don't see the inflated view but I do see the "Fragment 1 created" toast. What am I doing incorrectly? class Fragment1 : Fragment() { override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? { Toast.makeText(context, "Fragment 1 created", Toast.LENGTH_LONG).show()

In my fragment, I integrated android jetpack paging library and the data source I using PageKeyedDataSource with retrofit API callback. the code runs as excepted and loads the data to recyclerview but after I scroll to the bottom, it supposed to load more data by firing loadAfter function in data source class but it didn't I also switched to ItemKeyedDataSource still it fails to execute is my code wrong or the plugin have an issue! but in some demo apps which I found in GitHub works perfectly I followed there code. please if anyone had this problem and fixed let me know Edit: Using AndroidX

I am trying to use the navigation controller right now. I want to move from LoginFragment to HomeFragment . In LoginFragment I use this code below to move to HomeFragment . Navigation.findNavController(view).navigate(homeDestination) However, when I tap the back button in the HomeFragment , it will go back to LoginFragment , I expect that when I tap the button it will close the app. In old way, if I use activity instead of using Fragment , I usually do something like this to get that expected behaviour: val intent = Intent(this,HomeActivity::class.java) intent.flags = Intent.FLAG_ACTIVITY