我在我的片段中使用了AppCompatSpinner,并且想要在我的布局中使用setOnItemSelectedListener()
。我尝试使用这里的教程部分。
https://developer.android.com/topic/libraries/data-binding/index.html?hl=en#custom_setters
但它没有提供一个完整的例子来执行简单的操作。我也在这里寻找答案: 在自定义控件中使用Android数据绑定 我仍然不明白如何做到这一点。我想要一个完整的例子,来执行简单的自定义绑定,并且带有一些在xml属性中不存在但在UI控件中非常有用的属性。这是我的xml:
<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:apps="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
>
<data>
<import type="android.view.View"/>
<variable
name="handler"
type="com.my.OldHandlerInterface"/>
</data>
<merge
tools:showIn="@layout/fragment_stock_replacement">
<android.support.v7.widget.CardView
android:id="@+id/exist_eqpt_card"
style="@style/sccardview"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0.29"
android:visibility="@{oldObj.updateOld_mode ? View.VISIBLE : View.GONE}"
>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="10dp"
android:orientation="vertical">
<android.support.v7.widget.AppCompatSpinner
android:id="@+id/spn_status"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_below="@+id/chk_installed"
apps:adapter="@{statusAdapter}"/>
</RelativeLayout>
</android.support.v7.widget.CardView>
<!--</LinearLayout>-->
</merge>
</layout>
这是我的片段
public class ReplacementFragment extends QRScanFragment {
../
@BindingAdapter("app:setOnItemSelectedListener")
public static void setOnItemSelectedListener(AppCompatSpinner view, int pos) {
//do sth
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
binding = DataBindingUtil.inflate(inflater, R.layout.binding, container, false);
String[] status = new String[]{"Spare", "Lost", "Damage", "Faulty"};
statusAdapter = new StatusAdapter(getActivity(), status);
binding.setHandler(new Handler());
View view = binding.getRoot();
AppCompatSpinner lAppCompatSpinner = (AppCompatSpinner) view.findViewById(R.id.spn_status);
lAppCompatSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
}
}
}
}