如何使用下拉选项卡作为listview的过滤器

Question

这就是我现在所拥有的。当我在onitemselected上面使用时，我的listview会正常填充，但是当我将它注释掉或者当我尝试在spinner onitemselected中使用where子句时，它不起作用。

活动

public void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    setContentView(R.layout.listview_supports);

    try {
        openDB();
    } catch (SQLException e) {
        e.printStackTrace();
    }

//populateListFromDbSupports();


    final Spinner spinner2 = (Spinner) findViewById(R.id.spinner2);
    final ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(
            this, R.array.typeArray, android.R.layout.simple_spinner_item);
    adapter.setDropDownViewResource(
            android.R.layout.simple_spinner_dropdown_item);
    spinner2.setAdapter(adapter);
    spinner2.setOnItemSelectedListener(this);

    spinner2.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {

        @Override
        public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
            Toast.makeText(ViewSupports.this,
                    "You selected " + spinner2.getSelectedItem(),
                    Toast.LENGTH_LONG).show();


            final String type = (String) spinner2.getSelectedItem();

            final ImageView im = (ImageView) findViewById(R.id.imageView2);

            if (type.equals("One-Hole"))
                im.setImageDrawable(getResources().getDrawable(R.drawable.a167));
            //populateOneHole();
            if (type.equals("Two-Hole"))
                im.setImageDrawable(getResources().getDrawable(R.drawable.twohole));
            populateTwoHole();
            if (type.equals("One-Piece Strut"))
                im.setImageDrawable(getResources().getDrawable(R.drawable.a174));
            if (type.equals("Two-Piece Strut"))
                im.setImageDrawable(getResources().getDrawable(R.drawable.a131));
            if (type.equals("Mineralac"))
                im.setImageDrawable(getResources().getDrawable(R.drawable.a116));


//                myCursorAdapter.setFilterQueryProvider(new FilterQueryProvider() {
//                    @Override
//                    public Cursor runQuery(CharSequence constraint) {
//                        return DB.fetchSupportsBySize(type);
//
//                    }
//                });
            Log.d(null, type, null);
            //DB.fetchSupportsBySize(type);


        }




        @Override
        public void onNothingSelected(AdapterView<?> parent) {

        }

适配器

public static Cursor fetchSupportsBySize(String inputText) throws     SQLiteException {
    Log.w(TAG, inputText);
    Cursor mCursor = null;
    if (inputText == null ||inputText.length() == 0) {
        mCursor = db.query(SUPPORT_TABLE, new String[]{KEY_SUPPORT_ROWID, KEY_SUPPORT_SIZE, KEY_SUPPORT_TYPE, KEY_SUPPORT_MANUFACTURER, KEY_SUPPORT_PARTNUMBER},
                null, null, null, null, null);
    }
    else  {
        mCursor = db.query(true, SUPPORT_TABLE, new String[] {KEY_SUPPORT_ROWID, KEY_SUPPORT_SIZE, KEY_SUPPORT_TYPE, KEY_SUPPORT_MANUFACTURER, KEY_SUPPORT_PARTNUMBER},
                KEY_SUPPORT_SIZE + inputText, null, null, null, null, null);



    }
    if (mCursor != null) {
        mCursor.moveToFirst();
    }
    return mCursor;
}

public static Cursor fetchAllSupports() {
    Cursor mCursor = db.query(SUPPORT_TABLE, new String[] {KEY_SUPPORT_ROWID, KEY_SUPPORT_SIZE, KEY_SUPPORT_TYPE, KEY_SUPPORT_MANUFACTURER, KEY_SUPPORT_PARTNUMBER},
            null, null, null, null, null);

    if (mCursor != null) {
        mCursor.moveToFirst();
    }
    return mCursor;
}



public static Cursor getAllSupportsBySize() {
    return db.query(SUPPORT_TABLE, null, "support_size=?", new String[]{"1/2"}, null, null, null);

}
public static Cursor getOneHoles() {
    return db.query(SUPPORT_TABLE, null, "support_type=?", new String[]{"One-Hole"}, null, null, null);

}
public static Cursor getTwoHoles() {
    return db.query(SUPPORT_TABLE, null, "support_type=?", new String[]{"Two-Hole"}, null, null, null);

}
    });










}