android.widget.AutoCompleteTextView#setOnKeyListener ( )源码实例Demo

private void setupSearch() {

        search = (AutoCompleteTextView) findViewById(R.id.search);
        //Quando o usuario digita enter, ele faz a requisição procurando a posição daquela linha
        search.setOnKeyListener(new View.OnKeyListener() {
            @Override
            public boolean onKey(View v, int keyCode, KeyEvent event) {
                String searchContent = search.getText().toString();
                Activity activity = MainActivity.this;

                if ((event.getAction() == KeyEvent.ACTION_DOWN) &&
                        (keyCode == KeyEvent.KEYCODE_ENTER) &&
                        Util.isValidString(searchContent)) {

                    InputMethodManager imm = (InputMethodManager) getSystemService(
                            Context.INPUT_METHOD_SERVICE);
                    imm.hideSoftInputFromWindow(search.getWindowToken(), 0);

                    if (NetworkUtil.checkInternetConnection(activity)) {

                        new BusSearchTask(MainActivity.this).execute(searchContent);

                    } else {
                        Toast.makeText(activity, getString(R.string.error_connection_internet), Toast.LENGTH_SHORT).show();
                    }
                    return true;
                }
                return false;
            }
        });
    }
 

@Override
protected void onCreate(Bundle savedInstanceState) {
	super.onCreate(savedInstanceState);
	setContentView(R.layout.activity_add_item_shopping_list);

	try {
		shoppingList = ShoppingListDAO.select(this, getIntent().getExtras().getInt((getString(R.string.id_shopping_list))));
	} catch (VansException e) {
		Toast.makeText(this, e.getMessage(), Toast.LENGTH_LONG).show();
		e.printStackTrace();
	}

	this.setTitle(shoppingList.getName());

	lvItensShoppingList = (ListView) findViewById(R.id.lvItemShoppingList);
	lvItensShoppingList.setOnItemClickListener(this);
	lvItensShoppingList.setOnItemLongClickListener(this);

	headerView = (View) getLayoutInflater().inflate(R.layout.header_list_view_item_shopping_list, null);
	lvItensShoppingList.addHeaderView(headerView, null, false);

	adapter = new ItemShoppingListCursorAdapter(this, shoppingList.getId());
	lvItensShoppingList.setAdapter(adapter);

	edUnitValue = (EditText) findViewById(R.id.edUnitValue);
	edUnitValue.setVisibility(UserPreferences.getShowUnitValue(this) ? View.VISIBLE : View.GONE);
	edUnitValue.setOnKeyListener(this);
	edUnitValue.addTextChangedListener(new CustomEditTextWatcher(edUnitValue, 5));
	edUnitValue.setOnFocusChangeListener(this);

	edQuantity = (EditText) findViewById(R.id.edQuantity);
	edQuantity.addTextChangedListener(new CustomEditTextWatcher(edQuantity, 4));
	edQuantity.setVisibility(UserPreferences.getShowQuantity(this) ? View.VISIBLE : View.GONE);
	edQuantity.setOnFocusChangeListener(this);

	edDescription = (AutoCompleteTextView) findViewById(R.id.edDescription);
	edDescription.setOnItemClickListener(this);
	edDescription.addTextChangedListener(new CustomEditTextWatcher(edDescription, -1));

	if ((!UserPreferences.getShowQuantity(this)) && (!UserPreferences.getShowUnitValue(this))) {
		edDescription.setImeOptions(EditorInfo.IME_ACTION_GO);
		edDescription.setOnKeyListener(this);
	} else if (!UserPreferences.getShowUnitValue(this)) {
		edQuantity.setImeOptions(EditorInfo.IME_ACTION_GO);
		edQuantity.setOnKeyListener(this);
	}

}