onClick in Button不起作用使用数据绑定

Question

我开始学习数据绑定库 https://developer.android.com/topic/libraries/data-binding/index.html

我无法理解不这样做.

android {.... dataBinding {enabled = true}}

<data>
    <variable
        name="presenter"
        type="ua.com.it_st.ordersmanagers.activiteies.HistoryActivity"/>
</data>

<Button
    android:id="@+id/test"
    android:text="Start second activity"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:clickable="true"
    android:onClick="@{presenter::onHistoryClick}"
    />

public class HistoryActivity extends MvpAppCompatActivity implements HistoryView {

    @InjectPresenter
    HistoryPresenter historyPresenter;

    ActivityHistoryBinding binding;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
         binding = DataBindingUtil.setContentView(this, R.layout.activity_history);
    }

    public void onHistoryClick(View view) {
        Log.i("test ","test");
        binding.test.setText("test");
    }

Answer 1

您忘记将ViewModel设置为绑定.如果您希望onClick在活动中收到,则必须这样做

binding.setPresenter(this)

虽然我建议在XML文件中调用ViewModel viewModel或者activity(现在称为presenter).如果您希望presenter接收onClick,请将布局中的ViewModel类型从活动更改为演示者,在演示者中实现该onClick方法,然后执行此操作

binding.setPresenter(presenter)