Question

如何将自定义ListView的第一项选择为默认

lvModifierSet.setAdapter(modifierSetListAdapter);
AdapterView.OnItemClickListener onItemClickListener = new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int position, long l) {
                ModifierSet modifierSet = modifierSets.get(position);
                Toast.makeText(context, modifierSet.getModifier_set_name(), Toast.LENGTH_SHORT).show();
            }
        };
lvModifierSet.setOnItemClickListener(onItemClickListener);

这是我的自定义适配器

public class ModifierSetListAdapter extends ArrayAdapter<ModifierSet> {

    private Context context;
    private int resourceLayout;
    private List<ModifierSet> modifierSets;

    public ModifierSetListAdapter(Context context, int resource, List<ModifierSet> modifierSets) {
        super(context, resource, modifierSets);
        this.context = context;
        resourceLayout = resource;
        this.modifierSets = modifierSets;
    }

    @NonNull
    @Override
    public View getView(final int position, @Nullable View convertView, @NonNull ViewGroup parent) {

        View view = convertView;
        if (view == null) {
            LayoutInflater vi = LayoutInflater.from(context);
            view = vi.inflate(resourceLayout, null);
        }

        ModifierSet modifierSet = modifierSets.get(position);

        TextView tvModifierName = view.findViewById(R.id.modifier_set_tv_modifier_name);
        tvModifierName.setText(modifierSet.getModifier_set_name());

        return view;

    }

}

我在下面尝试过 link

Answer 1

尝试

检查适配器中的位置0

设置默认的textColor

tvModifierName.setTextColor(Your Color) ;

//现在检查位置0

 if (position ==0){
    tvModifierName.setTextColor(Your Color) ;
    or set backGround
    tvModifierName.setBackgroundColor(Your Color) ;
    }

Answer 2

您有列表视图选择器吗？如果不是，则需要创建一个选择器xml：

<?xml version="1.0" encoding="utf-8" ?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item 
        android:state_selected="true"
        android:drawable="@color/pressed_color"/>
    <item
        android:drawable="@color/default_color" />
</selector>

然后将其作为背景添加到您的列表中：

<ListView>
  ...  
    android:background="@drawable/selector"
  ...
</ListView>

然后它应该可以使用您看到的链接中的方法

如何使自定义ListView的第一项被选择为默认项

2 个答案: