package com.example.bottomnavigation;
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import androidx.appcompat.app.AppCompatActivity;
import androidx.navigation.NavController;
import androidx.navigation.Navigation;
import androidx.navigation.ui.AppBarConfiguration;
import androidx.navigation.ui.NavigationUI;
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import android.os.Bundle;
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import com.google.android.material.bottomnavigation.BottomNavigationView;
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public class MainActivity extends AppCompatActivity {
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    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        BottomNavigationView bottomNavigationView = findViewById(R.id.bottomNavigationView);
        NavController navController = Navigation.findNavController(this,R.id.fragment);
        AppBarConfiguration configuration = new AppBarConfiguration.Builder(bottomNavigationView.getMenu()).build();
        NavigationUI.setupActionBarWithNavController(this,navController,configuration);
        NavigationUI.setupWithNavController(bottomNavigationView,navController);
    }
}

package com.example.bottomnavigation;
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import androidx.lifecycle.ViewModelProviders;
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import android.animation.ObjectAnimator;
import android.os.Bundle;
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import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
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import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
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public class firstFragment extends Fragment {
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    private FirstViewModel mViewModel;
    private ImageView imageView;
    public static firstFragment newInstance() {
        return new firstFragment();
    }
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    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container,
                             @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.first_fragment, container, false);
        imageView = view.findViewById(R.id.imageView);
        return view;
    }
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    @Override
    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        mViewModel = ViewModelProviders.of(this).get(FirstViewModel.class);
        final ObjectAnimator objectAnimator = ObjectAnimator.ofFloat(imageView,"rotation",0,0);
        objectAnimator.setDuration(300);
        imageView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (!objectAnimator.isRunning()){
                    objectAnimator.setFloatValues(imageView.getRotation(),imageView.getRotation() - 100);
                    objectAnimator.start();
                }
            }
        });
    }
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}