如何在android中的数据绑定（MVVM）中将活动A意图到活动B

Question

如何将 Android 中活动 A 的 DataBinding（MVVM 模型）中的意图从 Button1 的 Activity-A 到 Activity-B 以及从 Button2 的 Activity-A 到 Activity-C。

public class MainActivity extends AppCompatActivity {

    private ActivityMainBinding binding;
    public static final int start_status = 1;
    public static final int  intent_status = 2;
    public static int current_status = -1;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        LoginViewModel loginViewModel = ViewModelProviders.of(this).get(LoginViewModel.class);

        binding = DataBindingUtil.setContentView(MainActivity.this, R.layout.activity_main);
        binding.setLifecycleOwner(this);

        binding.setLoginViewModel(loginViewModel);

        loginViewModel.getUser().observe(this, new Observer<User>() {
            @Override
            public void onChanged(@Nullable User loginUser) {
                switch (current_status){
                    case start_status :
                        Intent intentt = new Intent(MainActivity.this, Main2Activity.class);
                        startActivity(intentt);
                        break;

                    case intent_status :
                        Intent intent = new Intent(MainActivity.this, Main2Activity.class);
                        startActivity(intent);
                        break;
                }

                Intent intentt = new Intent(MainActivity.this, Main2Activity.class);
                startActivity(intentt);



            }
        });


    }


}