包含ListView中

Question

特定字母显示视图我有自定义适配器ListView和我创建使用矢量 我想只显示包含字母“A”，例如该国的TextView。 和我找不到解决方案来做到这一点。

这是我的适配器和我怎样努力去做

public class CountryAdapter extends BaseAdapter { 
protected MainActivity main = new MainActivity(); 
private Context mContext; 
protected Vector<Country> mVector; 
protected SQLiteDatabase mDb; 
Cursor cursor; 
ImageView deleteIt; 
View rowView; 
public int pos; 


public void setmContext(Context mContext) { 
    this.mContext = mContext; 
} 

public CountryAdapter(Context mContext) { 
    this.mContext = mContext; 

    mVector = new Vector<Country>(); 

    CountryOpenHelper helper = new CountryOpenHelper(mContext); 
    mDb = helper.getWritableDatabase(); 

    cursor = mDb.rawQuery("SELECT * FROM COUNTRIES", null); 

    if (cursor.getCount() > 0) { 

     cursor.moveToFirst(); 
    } 
    do { 
     Country country = new Country(); 
     country.setmCountryIndex(cursor.getInt(0)); 

     country.setmCountryName(cursor.getString(2)); 
     country.setmCountryTextSize(cursor.getInt(1)); 
     country.setmCountryColor(cursor.getInt(3)); 
     mVector.add(country); 
     for (int i = 0; i < cursor.getCount(); i++){ 
      if (mVector.get(i).toString().contains("a") == false){ 
       mVector.remove(i); 
      } 
     } 

    } while (cursor.moveToNext()); 

如果这里需要的是在我的CountryAdapter我GetView方法多数民众赞成在太：

public View getView(int position, View convertView, ViewGroup parent) { 
    TextView tv; 
    if(convertView == null){ 
     tv = new TextView(mContext); 
    }else{ 
     tv = (TextView) convertView; 
    } 

    this.pos = position; 

    tv.setText(mVector.get(position).getmCountryName()); 
    tv.setTextColor(mVector.get(position).getmCountryColor()); 
    tv.setTextSize(mVector.get(position).getmCountryTextSize()); 

    return tv; 




} 

Answer 1

我建议改变方向了一下：使用内置SimpleCursorAdapter或自定义CursorAdapter。 Cursors和CursorAdapters比转换Cursor成Vector或任何其它类型的List更有效的和有弹性的。他们还提供访问FilterQueryProvider类将过滤Cursor你。

尝试这个basic tutorial。

在for循环