android.widget.SimpleCursorAdapter#setFilterQueryProvider ( )源码实例Demo

/**
 * @param context this
 * @param layout  support_simple_spinner_dropdown_item
 * @return
 */
public ListAdapter getAutoCompleteAdapter(Context context, int layout) {
    SimpleCursorAdapter adapter =
            new SimpleCursorAdapter(context, layout,
                    null,
                    new String[]{FIELD_HWD},
                    new int[]{android.R.id.text1},
                    0
            );
    adapter.setFilterQueryProvider(
            new FilterQueryProvider() {
                @Override
                public Cursor runQuery(CharSequence constraint) {
                    return getFilterCursor(constraint.toString());
                }
            }
    );
    adapter.setCursorToStringConverter(
            new SimpleCursorAdapter.CursorToStringConverter() {
                @Override
                public CharSequence convertToString(Cursor cursor) {
                    return cursor.getString(1);
                }
            }
    );

    return adapter;
}
 

public ListAdapter getAutoCompleteAdapter(Context context, int layout) {
    SimpleCursorAdapter adapter =
            new SimpleCursorAdapter(context, layout,
                    null,
                    new String[]{"hwd"},
                    new int[]{android.R.id.text1},
                    0
            );
    adapter.setFilterQueryProvider(
            new FilterQueryProvider() {
                @Override
                public Cursor runQuery(CharSequence constraint) {
                    return getFilterCursor(constraint.toString());
                }
            }
    );
    adapter.setCursorToStringConverter(
            new SimpleCursorAdapter.CursorToStringConverter() {
                @Override
                public CharSequence convertToString(Cursor cursor) {
                    return cursor.getString(1);
                }
            }
    );

    return adapter;
}
 

/**
 * @param context this
 * @param layout  support_simple_spinner_dropdown_item
 * @return
 */
public ListAdapter getAutoCompleteAdapter(Context context, int layout) {
    SimpleCursorAdapter adapter =
            new SimpleCursorAdapter(context, layout,
                    null,
                    new String[]{FIELD_HWD},
                    new int[]{android.R.id.text1},
                    0
            );
    adapter.setFilterQueryProvider(
            new FilterQueryProvider() {
                @Override
                public Cursor runQuery(CharSequence constraint) {
                    return getFilterCursor(constraint.toString());
                }
            }
    );
    adapter.setCursorToStringConverter(
            new SimpleCursorAdapter.CursorToStringConverter() {
                @Override
                public CharSequence convertToString(Cursor cursor) {
                    return cursor.getString(1);
                }
            }
    );

    return adapter;
}
 

/**
 * @param context this
 * @param layout  support_simple_spinner_dropdown_item
 * @return
 */
public ListAdapter getAutoCompleteAdapter(Context context, int layout) {
    SimpleCursorAdapter adapter =
            new SimpleCursorAdapter(context, layout,
                    null,
                    new String[]{FIELD_HWD},
                    new int[]{android.R.id.text1},
                    0
            );
    adapter.setFilterQueryProvider(
            new FilterQueryProvider() {
                @Override
                public Cursor runQuery(CharSequence constraint) {
                    return getFilterCursor(constraint.toString());
                }
            }
    );
    adapter.setCursorToStringConverter(
            new SimpleCursorAdapter.CursorToStringConverter() {
                @Override
                public CharSequence convertToString(Cursor cursor) {
                    return cursor.getString(1);
                }
            }
    );

    return adapter;
}
 

@Override
public ListAdapter getAutoCompleteAdapter(Context context, int layout) {
    SimpleCursorAdapter adapter =
            new SimpleCursorAdapter(context, layout, null,
                    new String[] {ExternalDatabase.getHeadwordColumnName()},
                    new int[] {android.R.id.text1},
                    0
                    );
    adapter.setFilterQueryProvider(
            new FilterQueryProvider() {
                @Override
                public Cursor runQuery(CharSequence constraint) {
                    return mDatabase.getFilterCursor(mDictId, constraint.toString());
                }
            }
    );

    adapter.setCursorToStringConverter(
            new SimpleCursorAdapter.CursorToStringConverter() {
                @Override
                public CharSequence convertToString(Cursor cursor) {
                    return cursor.getString(1);
                }
            }
    );

    return adapter;
}
 

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    ButterKnife.bind(this);

    // Initializations
    drawerLayout = findViewById(R.id.drawer_layout);
    navigationView = findViewById(R.id.nav_view);
    toolbar = findViewById(R.id.toolbar_main);

    // Sets the Toolbar to act as the ActionBar for this Activity
    setSupportActionBar(toolbar);

    // Disable title (There is a textView instead of title, so we can skip the title)
    Objects.requireNonNull(getSupportActionBar()).setDisplayShowTitleEnabled(false);

    ActionBar actionBar = getSupportActionBar();
    if (actionBar != null) {
        actionBar.setDisplayHomeAsUpEnabled(true);
        actionBar.setHomeAsUpIndicator(R.drawable.ic_menu_white);
    }


    cityCountryName = sharedPreferences.getString(CITY_COUNTRY_NAME, "");
    actvCityCountryName.setText(cityCountryName);


    if (database.isOpen()) {
        checkDatabaseState();
    } else {
        database = databaseHelper.getReadableDatabase();
        checkDatabaseState();
    }

    // Create a SimpleCursorAdapter for the State Name field.
    mAdapter = new SimpleCursorAdapter(this,
            R.layout.dropdown_text,
            null,
            new String[]{CITY_COUNTRY_NAME},
            new int[]{R.id.text}, 0);
    mAdapter.setFilterQueryProvider(constraint -> {
        if (constraint != null) {
            if (constraint.length() >= 3 && !TextUtils.isEmpty(constraint)) {
                Bundle bundle = new Bundle();
                String query = charArrayUpperCaser(constraint);
                bundle.putString(CITY_ARGS, query);
                getLoaderManager().restartLoader(0, bundle, MainActivity.this).forceLoad();
            }
        }
        return null;
    });

    // Set an OnItemClickListener, to update dependent fields when
    // a choice is made in the AutoCompleteTextView.
    actvCityCountryName.setOnItemClickListener((listView, view, position, id) -> {
        // Get the cursor, positioned to the corresponding row in the
        // result set
        Cursor cursor = (Cursor) listView.getItemAtPosition(position);

        // Get the state's capital from this row in the database.
        cityCountryName = cursor.getString(cursor.getColumnIndexOrThrow(CITY_COUNTRY_NAME));

        // Update the parent class's TextView
        actvCityCountryName.setText(cityCountryName);

        requestWeather();
        hideKeyboard();
    });

    actvCityCountryName.setAdapter(mAdapter);

    actionBarDrawerToggle = new ActionBarDrawerToggle(
            this, drawerLayout, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);

    // Activate navigation drawer's listener
    activateDrawerListener();
}