Gson is intended for usage with pure Java and doesn’t interpret Kotlin primary constructors properly. If there is a default no-argument constructor, it is called (in your case, there is one: the primary constructor with default value “” for someString), otherwise Gson calls no constructor at all. Then Gson sets the property values (also, it … Read more
Because Fragment is NOT of Context type, you’ll need to call the parent Activity: val intent = Intent (getActivity(), Main::class.java) getActivity().startActivity(intent) or maybe something like activity?.let{ val intent = Intent (it, Main::class.java) it.startActivity(intent) }
OK, problem is with JDK, I was using Open JDK 8 and it was missing tools.jar for some reason, I switched to Oracle JDK and now it works like a charm!
Edit: note that the API suggested in the original answer is now marked @ObsoleteCoroutineApi: Ticker channels are not currently integrated with structured concurrency and their api will change in the future. You can now use the Flow API to create your own ticker flow: import kotlin.time.Duration import kotlin.time.Duration.Companion.seconds import kotlinx.coroutines.* import kotlinx.coroutines.flow.* fun tickerFlow(period: Duration, … Read more
Go to Tools > Kotlin > Configure Kotlin Plugin Updates and check for updates then in your app gradle file replace jre with jdk implementation”org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version” Update Newer version is jdk8 implementation”org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version”
I’ve created a gist with three debounce operators inspired by this elegant solution from Patrick where I added two more similar cases: throttleFirst and throttleLatest. Both of these are very similar to their RxJava analogues (throttleFirst, throttleLatest). throttleLatest works similar to debounce but it operates on time intervals and returns the latest data for each … Read more
As long as your Fragment creates a View, you can use the IBinder (window token) from that view after it has been attached. For example, you can override onActivityCreated in your Fragment: @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); final InputMethodManager imm = (InputMethodManager) getActivity().getSystemService(Context.INPUT_METHOD_SERVICE); imm.hideSoftInputFromWindow(getView().getWindowToken(), 0); }
What is the intended meaning of “companion object”? Why is it called “companion”? First, Kotlin doesn’t use the Java concept of static members because Kotlin has its own concept of objects for describing properties and functions connected with singleton state, and Java static part of a class can be elegantly expressed in terms of singleton: … Read more
Try this: public class MainActivity extends AppCompatActivity { final Fragment fragment1 = new HomeFragment(); final Fragment fragment2 = new DashboardFragment(); final Fragment fragment3 = new NotificationsFragment(); final FragmentManager fm = getSupportFragmentManager(); Fragment active = fragment1; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); setSupportActionBar(toolbar); BottomNavigationView navigation = (BottomNavigationView) findViewById(R.id.navigation); navigation.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener); … Read more
Google made Android more strict by adding the new BLUETOOTH_CONNECT and BLUETOOTH_SCAN permissions. You will get SecurityException in runtime if you attempt to access any BLE API that requires these permissions. So we need to check the permissions in the activity which is set to android.intent.action.MAIN in the manifest file. I call that as MainActivity. … Read more