Codename One Map

Question

I want to display a map with some coordinates, I can do it on one GUI Element, but when I duplicate the code for other GUI Element the map doesn't appear

This is the code for one GUI Element (page or screen)

@Override
protected void beforeMapaGPS(Form f) {
    MapComponent mapComponent= new MapComponent();
    double latitude=-41.169782;
    double longitude =-71.444885;

    Coord lastLocation = new Coord(latitude, longitude);
    mapComponent.zoomTo(lastLocation, 15);


    f.setLayout(new FlowLayout());
    f.addComponent(mapComponent);
    f.show();
}

and this is the other GUI Element (other page or screen) is copied from the first

@Override
protected void onCreateGUI1() {
 MapComponent mapComponent= new MapComponent();
    double latitude=-41.169782;
    double longitude =-71.444885;

    Coord lastLocation = new Coord(latitude, longitude);
    mapComponent.zoomTo(lastLocation, 15);


    f.setLayout(new FlowLayout());
    f.addComponent(mapComponent);
    f.show();
}

when I run the simulator the map appear on the first page or screen, and not on the other

Message received when I save the designer

Answer 1

首先，不要将FlowLayout用于任何对等组件或复杂组件，如Map，Browser，List，Multi-list ......

其次，您正在onCreate方法中为第二个表单实现Map代码。在beforeShow()或postShow()方法中进行。

最后，您通过在f.show()方法中调用beforeShow()来请求已经显示的表单。

将您的代码更改为：

@Override
protected void beforeMapaGPS(Form f) {
    MapComponent mapComponent= new MapComponent();
    double latitude=-41.169782;
    double longitude =-71.444885;

    Coord lastLocation = new Coord(latitude, longitude);
    mapComponent.zoomTo(lastLocation, 15);

    f.setLayout(new BorderLayout());
    f.addComponent(BorderLayout.CENTER, mapComponent);
}

和第二个：

@Override
protected void beforeGUI1(Form f) {
    MapComponent mapComponent= new MapComponent();
    double latitude=-41.169782;
    double longitude =-71.444885;

    Coord lastLocation = new Coord(latitude, longitude);
    mapComponent.zoomTo(lastLocation, 15);

    f.setLayout(new BorderLayout());
    f.addComponent(BorderLayout.CENTER, mapComponent);
}