在Material TextInputLayout中创建自定义MultiAutoCompleteTextView可以通过以下步骤实现:
implementation 'com.google.android.material:material:1.4.0'
<com.google.android.material.textfield.TextInputLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Enter text">
<AutoCompleteTextView
android:id="@+id/autoCompleteTextView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textAutoComplete" />
</com.google.android.material.textfield.TextInputLayout>
AutoCompleteTextView autoCompleteTextView = findViewById(R.id.autoCompleteTextView);
ArrayAdapter<String> adapter = new ArrayAdapter<>(this, android.R.layout.simple_dropdown_item_1line, suggestions);
autoCompleteTextView.setAdapter(adapter);
autoCompleteTextView.setTokenizer(new MultiAutoCompleteTextView.CommaTokenizer());
其中,suggestions是一个包含建议文本的字符串数组。
public class CustomAdapter extends ArrayAdapter<String> implements Filterable {
private List<String> suggestions;
public CustomAdapter(Context context, int resource, List<String> suggestions) {
super(context, resource, suggestions);
this.suggestions = suggestions;
}
@NonNull
@Override
public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
View view = super.getView(position, convertView, parent);
// 自定义样式
return view;
}
@NonNull
@Override
public Filter getFilter() {
return new Filter() {
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults filterResults = new FilterResults();
// 进行过滤操作
return filterResults;
}
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
if (results != null && results.count > 0) {
suggestions = (List<String>) results.values;
notifyDataSetChanged();
} else {
notifyDataSetInvalidated();
}
}
};
}
}
然后,在代码中使用自定义的Adapter来设置AutoCompleteTextView的适配器:
AutoCompleteTextView autoCompleteTextView = findViewById(R.id.autoCompleteTextView);
CustomAdapter adapter = new CustomAdapter(this, android.R.layout.simple_dropdown_item_1line, suggestions);
autoCompleteTextView.setAdapter(adapter);
autoCompleteTextView.setTokenizer(new MultiAutoCompleteTextView.CommaTokenizer());
这样就可以在Material TextInputLayout中创建自定义的MultiAutoCompleteTextView了。
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