package com.doumee.lib_coremodel.binding.viewadapter.spinner;
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import android.text.TextUtils;
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import android.view.View;
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import android.widget.AdapterView;
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import android.widget.ArrayAdapter;
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import android.widget.Spinner;
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import androidx.databinding.BindingAdapter;
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import com.doumee.lib_coremodel.binding.command.BindingCommand;
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import java.util.ArrayList;
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import java.util.List;
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/**
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* Created by goldze on 2017/6/18.
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*/
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public class ViewAdapter {
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/**
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* 双向的SpinnerViewAdapter, 可以监听选中的条目,也可以回显选中的值
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*
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* @param spinner 控件本身
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* @param itemDatas 下拉条目的集合
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* @param valueReply 回显的value
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* @param bindingCommand 条目点击的监听
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*/
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@BindingAdapter(value = {"itemDatas", "valueReply", "resource", "dropDownResource", "onItemSelectedCommand"}, requireAll = false)
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public static void onItemSelectedCommand(final Spinner spinner, final List<IKeyAndValue> itemDatas, String valueReply, int resource, int dropDownResource, final BindingCommand<IKeyAndValue> bindingCommand) {
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if (itemDatas == null) {
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throw new NullPointerException("this itemDatas parameter is null");
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}
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List<String> lists = new ArrayList<>();
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for (IKeyAndValue iKeyAndValue : itemDatas) {
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lists.add(iKeyAndValue.getKey());
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}
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if (resource == 0) {
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resource = android.R.layout.simple_spinner_item;
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}
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if (dropDownResource == 0) {
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dropDownResource = android.R.layout.simple_spinner_dropdown_item;
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}
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ArrayAdapter<String> adapter = new ArrayAdapter(spinner.getContext(), resource, lists);
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adapter.setDropDownViewResource(dropDownResource);
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spinner.setAdapter(adapter);
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spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
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@Override
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public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
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IKeyAndValue iKeyAndValue = itemDatas.get(position);
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//将IKeyAndValue对象交给ViewModel
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bindingCommand.execute(iKeyAndValue);
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}
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@Override
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public void onNothingSelected(AdapterView<?> parent) {
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}
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});
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//回显选中的值
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if (!TextUtils.isEmpty(valueReply)) {
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for (int i = 0; i < itemDatas.size(); i++) {
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IKeyAndValue iKeyAndValue = itemDatas.get(i);
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if (valueReply.equals(iKeyAndValue.getValue())) {
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spinner.setSelection(i);
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return;
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}
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}
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}
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}
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}
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