Question

我已提到this，this also和this one too。不，我在哪里找到解决问题的方法。在输入编辑文本时没有过滤，列表视图保持不变这是代码：

MainActivity.java

public class MainActivity extends AppCompatActivity implements OnItemClickListener {

public static final String[] titles = new String[] { "H C Verma",
        "P Bahadur", "I E Irodov", "M L Khanna",
        "O P Tondon", "Morrison & Boyd", "Halliday Resnick",
        "R D Sharma", "S L Loney", "Hall and Knight", "Krotov", "I A Maron" };
public EditText search;
CustomAdapter adapter;

public static final String[] descriptions = new String[] {

        "Physics",
        "Chemistry",
        "Physics",
        "Mathematics",
        "Chemistry",
        "Chemistry",
        "Physics",
        "Mathematics",
        "Mathematics",
        "Chemistry",
        "Physics",
        "Mathematics"

};

public static final Integer[] images = { R.drawable.hcv,
    R.drawable.bahadur, R.drawable.irodov, R.drawable.mlkhanna,
    R.drawable.tondon, R.drawable.boyd, R.drawable.resnick, R.drawable.sharma,
    R.drawable.loney, R.drawable.knight, R.drawable.krotov, R.drawable.maron};
public static final String[] pub = new String[]{"Bharti Bhavan", "G R Bathla Publications", "Arihant",
"Jai Prakash Nath", "G R Bathla Publications", "Pearson Publications",
"Wiley Publications", "Dhanpat Rai Publications","Classic Texts series","Classic Texts series","G K Publications","G K Publications"};

ListView listView;
List<RowItem> rowItems;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    search = (EditText)findViewById(R.id.inputSearch);

    rowItems = new ArrayList<>();
    for (int i = 0; i < titles.length; i++) {
        RowItem item = new RowItem(images[i], titles[i], descriptions[i], pub[i]);
        rowItems.add(item);
    }

    listView = (ListView) findViewById(R.id.list);
    adapter = new CustomAdapter(this, rowItems);
    listView.setAdapter(adapter);
    listView.setOnItemClickListener(this);
    listView.setTextFilterEnabled(true);

    search.addTextChangedListener(new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {

        }

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {
           System.out.println("Text ["+s+"]");

            adapter.getFilter().filter(s.toString());

        }

        @Override
        public void afterTextChanged(Editable s) {

        }
    });
}

@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
                        long id) {
    Toast toast = Toast.makeText(getApplicationContext(),
            "Item " + (position + 1) + ": " + rowItems.get(position),
            Toast.LENGTH_SHORT);
    toast.show();
}

}

CustomAdapter.java

public class CustomAdapter extends BaseAdapter implements Filterable{
List<RowItem> filteredData;
Context context;
List<RowItem> rowItems;
CustomFilter filter;

public CustomAdapter(Context context, List<RowItem> items) {
    this.context = context;
    this.rowItems = items;
    this.filteredData = items;
}
@Override
public int getCount() {
    return filteredData.size();
}

@Override
public Object getItem(int position) {
    return filteredData.get(position);
}

@Override
public long getItemId(int position) {
    return rowItems.indexOf(getItem(position));
}



/*private view holder class*/
private class ViewHolder {
    ImageView imageView;
    TextView txtTitle;
    TextView txtDesc;
    TextView pubname;
}

public View getView(int position, View convertView, ViewGroup parent) {
    ViewHolder holder = null;

    LayoutInflater mInflater = (LayoutInflater)
            context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
    if (convertView == null) {
        convertView = mInflater.inflate(R.layout.list_item, parent, false);
        holder = new ViewHolder();
        holder.txtDesc = (TextView) convertView.findViewById(R.id.desc);
        holder.txtTitle = (TextView) convertView.findViewById(R.id.title);
        holder.pubname = (TextView) convertView.findViewById(R.id.pub);
        holder.imageView = (ImageView) convertView.findViewById(R.id.icon);
        convertView.setTag(holder);
    }
    else {
        holder = (ViewHolder) convertView.getTag();
    }

    RowItem rowItem = (RowItem) getItem(position);

    holder.txtDesc.setText(rowItem.getDesc());
    holder.txtTitle.setText(rowItem.getTitle());
    holder.pubname.setText(rowItem.getPub());
    holder.imageView.setImageResource(rowItem.getImageId());

    return convertView;
}
public Filter getFilter() {
    if(filter == null)
    {
        filter=new CustomFilter();
    }

    return filter;}


  class CustomFilter extends Filter {
      @Override
      protected FilterResults performFiltering(CharSequence constraint) {

          FilterResults results = new FilterResults();

          if (constraint != null && constraint.length() > 0) {
              //CONSTARINT TO UPPER
              constraint = constraint.toString().toUpperCase();

              ArrayList<RowItem> filters = new ArrayList<RowItem>();

              //get specific items
              for (int i = 0; i < filteredData.size(); i++) {
                  if (filteredData.get(i).getTitle().toUpperCase().contains(constraint)) {
                      RowItem p = new RowItem(filteredData.get(i).getImageId(), filteredData.get(i).getTitle(), filteredData.get(i).getDesc(), filteredData.get(i).getPub());

                      filters.add(p);
                  }
              }

              results.count = filters.size();
              results.values = filters;

          } else {
              results.count = filteredData.size();
              results.values = filteredData;

          }

          return results;
      }
      @SuppressWarnings("unchecked")
      @Override
      protected void publishResults(CharSequence constraint, FilterResults results) {
          // TODO Auto-generated method stub

          if (results.count == 0) {
              notifyDataSetInvalidated();
          } else {
              rowItems = (ArrayList<RowItem>) results.values;
              notifyDataSetChanged();
          }
      }

  }}

content_main.xml

<?xml version="1.0" encoding="utf-8"?>


<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:layout_marginTop="35dp"
    android:orientation="vertical" >
<EditText android:id="@+id/inputSearch"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="45dp"
    android:hint="Search Books.."
    android:inputType="textVisiblePassword"/>

<ListView
        android:id="@+id/list"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:clipToPadding="false"
        android:padding="20dip"
        android:listSelector="@drawable/list_selector"
        />

</LinearLayout>

请帮帮我。

使用ArrayAdapter

public class CustomAdapter extends ArrayAdapter<RowItem> implements Filterable{
List<RowItem> filteredData;
Context context;
List<RowItem> rowItems;
CustomFilter filter;

public CustomAdapter(Context context, List<RowItem> items) {
    super(context, R.layout.list_item);
    this.context = context;
    this.rowItems = items;
    this.filteredData = items;
}
 /* @Override
public int getCount() {
    return filteredData.size();
}

@Override
public Object getItem(int position) {
    return filteredData.get(position);
}

@Override
public long getItemId(int position) {
    return rowItems.indexOf(getItem(position));
}*/



/*private view holder class*/
private class ViewHolder {
    ImageView imageView;
    TextView txtTitle;
    TextView txtDesc;
    TextView pubname;
}

public View getView(int position, View convertView, ViewGroup parent) {
    ViewHolder holder = null;

    LayoutInflater mInflater = (LayoutInflater)
            context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
    if (convertView == null) {
        convertView = mInflater.inflate(R.layout.list_item, parent, false);
        holder = new ViewHolder();
        holder.txtDesc = (TextView) convertView.findViewById(R.id.desc);
        holder.txtTitle = (TextView) convertView.findViewById(R.id.title);
        holder.pubname = (TextView) convertView.findViewById(R.id.pub);
        holder.imageView = (ImageView) convertView.findViewById(R.id.icon);
        convertView.setTag(holder);
    }
    else {
        holder = (ViewHolder) convertView.getTag();
    }

    RowItem rowItem = (RowItem) getItem(position);

    holder.txtDesc.setText(rowItem.getDesc());
    holder.txtTitle.setText(rowItem.getTitle());
    holder.pubname.setText(rowItem.getPub());
    holder.imageView.setImageResource(rowItem.getImageId());

    return convertView;
}
public Filter getFilter() {
    if(filter == null)
    {
        filter=new CustomFilter();
    }

    return filter;}


  class CustomFilter extends Filter {
      @Override
      protected FilterResults performFiltering(CharSequence constraint) {

          FilterResults results = new FilterResults();

          if (constraint != null && constraint.length() > 0) {
              //CONSTARINT TO UPPER
              constraint = constraint.toString().toUpperCase();

              ArrayList<RowItem> filters = new ArrayList<RowItem>();

              //get specific items
              for (int i = 0; i < filteredData.size(); i++) {
                  if (filteredData.get(i).getTitle().toUpperCase().contains(constraint)) {
                      RowItem p = new RowItem(filteredData.get(i).getImageId(), filteredData.get(i).getTitle(), filteredData.get(i).getDesc(), filteredData.get(i).getPub());

                      filters.add(p);
                  }
              }

              results.count = filters.size();
              results.values = filters;

          } else {
              results.count = filteredData.size();
              results.values = filteredData;

          }

          return results;
      }
      @SuppressWarnings("unchecked")
      @Override
      protected void publishResults(CharSequence constraint, FilterResults results) {
          // TODO Auto-generated method stub

          if (results.count == 0) {
              notifyDataSetInvalidated();
          } else {
              rowItems = (ArrayList<RowItem>) results.values;
              notifyDataSetChanged();
          }
      }

  }

Answer 1

好的！代码中完成的两个愚蠢的错误是： 在CustomAdapter.java 中扩展基类替换

 rowItems = (ArrayList<RowItem>) results.values;

与

 filteredData = (ArrayList<RowItem>) results.values;

并且因为在擦除编辑文本中输入的文本也会导致调用textchange函数，因此如果再次搜索filteredData，它将只搜索先前过滤的数据，所以添加

filteredData = rowItems;

之前

 FilterResults results = new FilterResults();

谢谢。

搜索不在自定义列表视图中工作

1 个答案: