Question

我的listView有问题，当我点击清除按钮时，我希望我的列表清除（显然）但由于某种原因我的清单未清除这里是下面的代码，任何帮助将不胜感激。谢谢

MainClass

@Component
public class CamelS3HeadersProcessor implements Processor {
  @Override
  public void process(Exchange exchange) throws Exception {
    SimpleBuilder simpleBuilder = new SimpleBuilder("${file:name}");
    String fileName = simpleBuilder.evaluate(exchange, String.class);
    //do some logic and set headers
  }
}

这是我的自定义适配器

public class MainActivity extends AppCompatActivity {
ArrayList<SearchResults> searchResults;
private FloatingActionButton add;
private FloatingActionButton clear;
ArrayList<SearchResults> results = new ArrayList<SearchResults>();
final Context context = this;
String time1, people1, description1, mDate, hour, minute, MeridiemIndicator, dateNumber;
int Year, Month, Day, Hour, Minute;


@Override
public void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    searchResults = new ArrayList<SearchResults>();
    setContentView(R.layout.activity_main);
    final ListView lv1 = (ListView) findViewById(R.id.ListView);
    final CustomAdapter myAdapter = new CustomAdapter(context, R.layout.custom_row_view, results);
    lv1.setAdapter(myAdapter);


    add = (FloatingActionButton) findViewById(R.id.add);
    add.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(final View view) {

            dialogMethod(lv1);
        }


    });

    lv1.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            CustomAdapter adapter = (CustomAdapter) parent.getAdapter();
            adapter.remove(results.get(position));
            adapter.notifyDataSetChanged();


        }
    });
    lv1.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
        @Override
        public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long l) {
            CustomAdapter adapter = (CustomAdapter) parent.getAdapter();
            adapter.remove(results.get(position));
            adapter.notifyDataSetChanged();
            dialogMethod(lv1);

            return false;
        }


    });
    clear = (FloatingActionButton) findViewById(R.id.clear);
    clear.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(final View view) {
            results.clear();
            myAdapter.notifyDataSetChanged();
        }


    });
}

private ArrayList<SearchResults> GetSearchResults() {


    SearchResults sr1 = new SearchResults();
    sr1.setName("  Meeting With: " + people1);
    sr1.setTimeOfMeeting("  Starts At: " + time1);
    sr1.setDescription("  Details: " + description1);
    sr1.setDate("  Date: " + mDate);
    sr1.setDateNumber(dateNumber);
    results.add(sr1);
    Collections.sort(results, new Comparator<SearchResults>() {
        public int compare(SearchResults x, SearchResults y) {
            return Integer.parseInt(x.getDateNumber()) - Integer.parseInt(y.getDateNumber());
        }
    });


    return results;
}

问题更具体地说是浮动动作按钮“清除”下面的主要方法。再次谢谢你

Answer 1

再次清除列表setadapter之后。

  clear.setOnClickListener(new View.OnClickListener() {

    @Override
    public void onClick(final View view) {
        results.clear();
        CustomAdapter myAdapter = new CustomAdapter(context, R.layout.custom_row_view, results);
lv1.setAdapter(myAdapter);
        myAdapter.notifyDataSetChanged();
    }


});

OR

清除适配器

myAdapter.clear();
myAdapter.notifyDataSetChanged();

为什么我的listView不清楚？

1 个答案: