Question

正如您所看到的，这是我的列表类。我希望能够使用editText过滤此列表。任何人都可以指出我所需的查询布局或代码片段的正确方向吗？

public class CBFilter extends ListActivity {

EditText Filter;
ListView RecipeNames;
Cursor cursor;
CBListAdapter adapter;
CBDataBaseHelper data;
SQLiteDatabase data2;
TextView RecipeText, RowId;
String[] from = { CBDataBaseHelper.KEY_NAME};
int[] to = { R.id.rowText};
ImageView image;
byte[] dataImage;
BufferedInputStream buf;

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);
setContentView(R.layout.main);
boolean diditwork;
try{

//FileInputStream in;//= openFileInput("//STEFAN-PC/Users/stefan/Desktop/Uni Work/Image.jpg");
RecipeNames = (ListView) findViewById(android.R.id.list);
RecipeNames.setTextFilterEnabled(true);
RecipeText = (TextView) findViewById(R.id.recipeText);
Filter = (EditText) findViewById(R.id.search_box);

//adapter = new SimpleCursorAdapter (this, 0, cursor, null, null);
image = (ImageView) findViewById(R.id.RecipeImage);
data = new CBDataBaseHelper(this);
data.open();
cursor = data.query();
startManagingCursor(cursor);
adapter = new CBListAdapter(this, 0, cursor, from, to);
RecipeNames.setAdapter(adapter);
adapter.notifyDataSetChanged();

Filter.addTextChangedListener(new TextWatcher() {
    public void onTextChanged(CharSequence s, int start, int before, int count) {
    }

    public void beforeTextChanged(CharSequence s, int start, int count, int after) {
    }

    public void afterTextChanged(Editable s) {

        RecipeNames = (ListView) findViewById(android.R.id.list);
        CBListAdapter filteradapter = (CBListAdapter)RecipeNames.getAdapter();
        filteradapter.getFilter().filter(s.toString());


    }




});

 /*adapter.setFilterQueryProvider(new FilterQueryProvider() {
        public Cursor runQuery(CharSequence constraint) {
            return getDirectoryList(constraint);
        }
    });*/


/*adapter.setFilterQueryProvider(new FilterQueryProvider() {
    public Cursor runQuery(CharSequence constraint) {
        return getDirectoryList(constraint);
    }
});*/


}catch(Exception e){
diditwork = false;
String error = e.toString();
Dialog d = new Dialog(this);
d.setTitle("darn");
TextView tv = new TextView(this);
tv.setText(error);
d.setContentView(tv);
d.show();
}}


/*public Cursor getDirectoryList (CharSequence constraint)  {
    SQLiteQueryBuilder queryBuilder = new SQLiteQueryBuilder();
    queryBuilder.setTables(
        CBDataBaseHelper.DATABASE_TABLE
    );

    String asColumnsToReturn[] = { 
            CBDataBaseHelper.DATABASE_TABLE + "."
            + CBDataBaseHelper.KEY_NAME 
    };

    if (constraint == null  ||  constraint.length () == 0)  {
        //  Return the full list
        return queryBuilder.filter(, asColumnsToReturn, null, null,
                null, null, null);  }  
    else  {
        String value = "%"+constraint.toString()+"%";

        return data.query(CBDataBaseHelper.DATABASE_TABLE, asColumnsToReturn, "LAST_NAME like ? ", new String[]{value}, null, null, null);
    }
}*/

public void CreateNew(View view){

    Intent myIntent = new Intent(this, CBCreate.class);
    startActivity(myIntent);
}

@Override
public void onListItemClick(ListView parent, View v, int position, long id) {
    super.onListItemClick(parent, v, position, id);
    Intent intent1 = new Intent(this, CBCreate.class);
    long rowId = cursor.getLong(cursor.getColumnIndex(CBDataBaseHelper.KEY_ROWID));
    String s = String.valueOf(rowId);
    intent1.putExtra("SELECTED", s);
    startActivity(intent1);
}


}

Answer 1

我在SQLite上并不擅长，但我想如果你只是放置你的过滤器在查询中它应该只吐出你想要的东西。

public Cursor findRecipe(String filter) {
    return db.query("myrecipetable", null, 
        "rec_recipecolumn LIKE" + filter, null, null, null, null);
}

然后只需针对您需要涵盖的所有表格进行调整。

如何过滤数据库内容以填充ListView？

1 个答案: