I am trying to use a GitHub library (MeowBottomNavigation)in Android Studio.But its written in kotlin and i cant use the listeners in it. The only thing which is given is this
bottomNavigation.setOnShowListener {
}
bottomNavigation.setOnClickMenuListener {
}
the suggestions shows to use
(Function1)
i am not sure as to how to implement this in java . Any help will be appreciated.
I am familiar with java but the library is written in Kotlin. Is there any way to use these listeners in java?
bottomNavigation.setOnClickMenuListener(new
Function1<MeowBottomNavigation.Model, Unit>() {
@Override
public Unit invoke(MeowBottomNavigation.Model p1) {
int i = p1.getId();
switch (i){
case 4:
Toast.makeText(UserMainActivity.this, i, Toast.LENGTH_SHORT).show();
break;
case 1:
Toast.makeText(UserMainActivity.this, i, Toast.LENGTH_SHORT).show();
break;
case 2:
Toast.makeText(UserMainActivity.this, i, Toast.LENGTH_SHORT).show();
break;
case 3:
Toast.makeText(UserMainActivity.this, i, Toast.LENGTH_SHORT).show();
break;
}
return Unit.INSTANCE;
}
});
Function0, Function1, Function2, ... FunctionN are higher-order functions in kotlin.
After converting to java, your click listeners become something like below.
// Set Menu Click Listener
bottomNavigation.setOnClickMenuListener(new Function1<MeowBottomNavigation.Model, Unit>() {
@Override
public Unit invoke(MeowBottomNavigation.Model p1) {
return Unit.INSTANCE;
}
});
// Set Menu Show listener
bottomNavigation.setOnShowListener(new Function1<MeowBottomNavigation.Model, Unit>() {
@Override
public Unit invoke(MeowBottomNavigation.Model s) {
return Unit.INSTANCE;
}
});
something like This::
bottomNavigation.setOnShowListener( new IBottomNavigationListener(Model model)
{
} );
if you are using fragments
//1.-declare fragments globally in your activity
private HomeFragment homeFragment = new HomeFragment();
//2.- declare a method to switch between fragments
public void loadFragment(Fragment fragment){
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.yourFragmentContainer,fragment);
transaction.commit();
}
//3.- in the Set Menu Click/show Listener call the fragment to show
// Set Menu Click Listener
bottomNavigation.setOnClickMenuListener(new Function1<MeowBottomNavigation.Model, Unit>() {
@Override
public Unit invoke(MeowBottomNavigation.Model model) {
int i = model.getId();
switch (i){
case 1:
loadFragment(homeFragment);
break;
//...other cases
}
return Unit.INSTANCE;
}
});
// Set Menu Show listener
bottomNavigation.setOnShowListener(new Function1<MeowBottomNavigation.Model, Unit>() {
@Override
public Unit invoke(MeowBottomNavigation.Model model) {
int i = model.getId();
switch (i){
case 1:
loadFragment(homeFragment);
break;
//...other cases
}
return Unit.INSTANCE;
}
});