JavaFXPorts:未选择 ListView 中的选定项目

Question

示例代码如下:

package com.javafxportslistviewdemo;

import com.gluonhq.charm.down.Platform;
import com.gluonhq.charm.down.Services;
import com.gluonhq.charm.down.plugins.LifecycleEvent;
import com.gluonhq.charm.down.plugins.LifecycleService;
import javafx.application.Application;
import javafx.beans.value.ObservableValue;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.geometry.Rectangle2D;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.control.ListView;
import javafx.scene.input.KeyCode;
import javafx.scene.input.KeyEvent;
import javafx.scene.layout.VBox;
import javafx.stage.Screen;

import javafx.stage.Stage;

public class JavaFXPortsListViewDemo extends Application {

    @Override
    public void init() {
    }

    @Override
    public void start(Stage primaryStage) throws Exception {
        Screen primaryScreen = Screen.getPrimary();
        Rectangle2D visualBounds = primaryScreen.getVisualBounds();
        double width = visualBounds.getWidth();
        double height = visualBounds.getHeight();

        Label label = new Label("Here is selected item...");

        ListView<String> listView = new ListView<>();
        ObservableList<String> items = FXCollections.observableArrayList(
                "one", "two", "three", "four");
        listView.setItems(items);
        listView.getSelectionModel().selectedItemProperty().addListener((ObservableValue<? extends String> ov, String old_val, String new_val) -> {
            label.setText(new_val);
        });

        VBox root = new VBox();
        root.getChildren().addAll(label, listView);

        Scene scene = new Scene(root, width, height);

        Services.get(LifecycleService.class).ifPresent(ls -> {
            ls.addListener(LifecycleEvent.PAUSE, () -> onPause());
            ls.addListener(LifecycleEvent.RESUME, () -> onResume());
        });

        scene.addEventHandler(KeyEvent.KEY_RELEASED, e -> {
            if (KeyCode.ESCAPE.equals(e.getCode())) {
                if (Platform.isAndroid()) {
                    // bring up the menu or other Android stuff
                    Services.get(LifecycleService.class).ifPresent(LifecycleService::shutdown);
                } else {
                    // bring up the menu or other Desktop stuff
                    Services.get(LifecycleService.class).ifPresent(LifecycleService::shutdown);
                }
            }
        });

        primaryStage.setScene(scene);
        primaryStage.show();
    }

    private void onPause() {
    }

    private void onResume() {
    }
}

开发环境:JavaFXPorts 8.60.8、javafxmobile-plugin 1.1.0、Gluon Plugin 2.4.0、NetBeans 8.1、Windows 10 Pro，64 位

测试环境:Android设备Samsung Galaxy A5 2016，Android 6.0.1

重现步骤:1. 使用以下代码构建示例代码:JavaFXPorts 8.60.8、javafxmobile-plugin 1.1.0、Gluon Plugin 2.4.0； 2. 在Android设备(Android 6.0.1)上安装并运行示例； 3. Touch on ListView and Select any item from ListView - item is not selected -> BUG

为 JavaFXPorts 的问题跟踪器添加了错误:JavaFXPorts issue

Answer 1

感谢您报告问题。

众所周知，在某些三星设备中，触摸事件处理与其他 Android 设备不同。

虽然这在 JavaFXPorts 中已修复，但您可以使用以下解决方法:为在内部连接选择的 ListCell 提供一个监听器。

根据您的样本:

    ListView<String> listView = new ListView<>();
    listView.setCellFactory(p -> new ListCell<String>() {

        private String item;
        {
            setOnMouseClicked(e -> listView.getSelectionModel().select(item));
        }

        @Override
        protected void updateItem(String item, boolean empty) {
            super.updateItem(item, empty); 
            this.item = item;
            setText(item);
        }

    });
    listView.getSelectionModel().selectedItemProperty()
      .addListener((ov, old_val, new_val) -> label.setText(new_val));