Question

我有一个项目，我可以添加数据，删除它们并使用SQLite更新它们。当然我在列表视图中显示它们。我想做的最后一件事是使用searchView对象，因此用户可以搜索他想要的数据并检查它们是否在那里。但是SearchView对象什么都不做。我按目的键入了列表视图中存在的内容，并且匹配的行不会出现。

这是我的代码。

public class DisplayForldersActivity extends AppCompatActivity {
DatabaseHandler dba;

private ArrayList<MyFolder> dbFolders = new ArrayList<>();
private FolderAdapter folderAdapter;
private ListView listView;

SearchView inputSearch;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_display_forlders);

    listView = (ListView)findViewById(R.id.list);
    inputSearch = (SearchView) findViewById(R.id.inputSearch);


    fetchDataFromDB();


}

private void fetchDataFromDB() {
    dbFolders.clear();
    dba = new DatabaseHandler(getApplicationContext());

    ArrayList<MyFolder> foldersFromDB = dba.getFolderDetails();

    for(int i=0; i<foldersFromDB.size();i++){

        String plateNo = foldersFromDB.get(i).getPlateNumber();
        String owner = foldersFromDB.get(i).getOwnerName();
        String cardId = foldersFromDB.get(i).getCardId();
        String content = foldersFromDB.get(i).getContent();
        String date = foldersFromDB.get(i).getRecordDate();
        int mid = foldersFromDB.get(i).getItemId();

        MyFolder f = new MyFolder();
        f.setPlateNumber(plateNo);
        f.setOwnerName(owner);
        f.setCardId(cardId);
        f.setContent(content);
        f.setRecordDate(date);
        f.setItemId(mid);

        dbFolders.add(f);

        folderAdapter = new FolderAdapter(DisplayForldersActivity.this,R.layout.folders_row,dbFolders);
        listView.setAdapter(folderAdapter);
        folderAdapter.notifyDataSetChanged();

        inputSearch.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
            @Override
            public boolean onQueryTextSubmit(String query) {
                return false;
            }

            @Override
            public boolean onQueryTextChange(String newText) {
                folderAdapter.getFilter().filter(newText);
                return false;
            }
        });

    }
    dba.close();
}

我的适配器代码

 private class FolderAdapter extends ArrayAdapter<MyFolder>{
    Activity activity;
    int layoutResource;
    MyFolder myFolder;
    ArrayList<MyFolder> mData = new ArrayList<>();


    public FolderAdapter(Activity act, int resource, ArrayList<MyFolder> data) {
        super(act, resource,data);

        activity = act;
        layoutResource = resource;
        mData = data;

        notifyDataSetChanged();
    }

    @Override
    public int getCount() {
        return mData.size();
    }

    @Override
    public MyFolder getItem(int position) {
        return mData.get(position);
    }

    @Override
    public long getItemId(int position) {
        return super.getItemId(position);
    }

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

        View row = convertView;

        ViewHolder holder = null;

        if(row == null || row.getTag()==null){
            LayoutInflater inflater = LayoutInflater.from(activity);

            row = inflater.inflate(layoutResource,null);

            holder = new ViewHolder();

            holder.mPlateNo = (TextView)row.findViewById(R.id.plateNumberList);
            //holder.mOwner = (TextView)row.findViewById(R.id.ownerName);
            holder.mcardId = (TextView)row.findViewById(R.id.idNumber);
            //holder.mContent = (TextView)row.findViewById(R.id.processing);
            holder.mDate = (TextView)row.findViewById(R.id.dateText);

            row.setTag(holder);

        }else{
            holder = (ViewHolder)row.getTag();
        }
        holder.myF = getItem(position);

        holder.mPlateNo.setText(holder.myF.getPlateNumber());
        //holder.mOwner.setText(holder.myF.getOwnerName());
        //holder.mcardId.setText(holder.myF.getCardId());
        //holder.mPlateNo.setText(holder.myF.getPlateNumber());
        holder.mDate.setText(holder.myF.getRecordDate());
        final ViewHolder finalHolder = holder;


        holder.mPlateNo.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                String dateText = finalHolder.myF.getRecordDate().toString();
                String owner = finalHolder.myF.getOwnerName().toString();
                String cardId = finalHolder.myF.getCardId().toString();
                String plateNumber = finalHolder.myF.getCardId().toString();
                String content = finalHolder.myF.getContent().toString();

                int mid = finalHolder.myF.getItemId();


                Intent i = new Intent(DisplayForldersActivity.this,DetailedFolderActivity.class);
                i.putExtra("id",mid);
                i.putExtra("owner",owner);
                i.putExtra("cardId",cardId);
                i.putExtra("plateNumber",plateNumber);
                i.putExtra("content",content);
                i.putExtra("dateText",dateText);

                startActivity(i);
            }
        });

        return row;
    }

    class ViewHolder{
        MyFolder myF;
        int mid;
        TextView mPlateNo;
        TextView mOwner;
        TextView mcardId;
        TextView mContent;
        TextView mDate;


    }


}

我做错了什么吗？感谢

Answer 1

您需要在附加到listView的适配器中调用notifyDataSetChanged以使ListView无效并使其绘制已更改/删除/插入的行。

Answer 2

您的数组适配器需要实现Filterable接口，它将覆盖getFilter（）方法。然后在你的getFilter（）方法中，你可以执行过滤操作。

查看此stackoverflow链接，此代码可能会帮助您 No results with custom ArrayAdapter Filter

Answer 3

SerchView不处理任何搜索，它只是一个小部件。您必须自己实现搜索逻辑。试试这里描述的解决方案： http://developer.android.com/guide/topics/search/search-dialog.html

您也可以通过调用SearchView.setOnQueryTextListener（SearchView.OnQueryTextListener侦听器）并传入侦听器的自定义实现来执行此操作。

在自定义列表视图中搜索行时，SearchView无法正常工作

3 个答案: