MyApplication.java

package com.mycompany.myapp;

//Android > Source Packages > package com.mycompany.myapp > MyApplication.java
// full working android project + configured theme.res (mine)
// android images parts link : https://imgur.com/a/T57SF32

import com.codename1.components.ImageViewer;
import static com.codename1.ui.CN.*;
import com.codename1.ui.Display;
import com.codename1.ui.Form;
import com.codename1.ui.Dialog;
import com.codename1.ui.Label;
import com.codename1.ui.plaf.UIManager;
import com.codename1.ui.util.Resources;
import com.codename1.io.Log;
import com.codename1.ui.Toolbar;
import java.io.IOException;
import com.codename1.ui.layouts.BoxLayout;
import com.codename1.io.NetworkEvent;
import com.codename1.ui.Container;
import com.codename1.ui.util.UIBuilder;

/**
 * This file was generated by <a href="https://www.codenameone.com/">Codename One</a> for the purpose
 * of building native mobile applications using Java.
 */
public class MyApplication {

    private Form current;
    private Resources theme;

    public void init(Object context) {
        // use two network threads instead of one
        updateNetworkThreadCount(2);

        theme = UIManager.initFirstTheme("/theme");

        // Enable Toolbar on all Forms by default
        Toolbar.setGlobalToolbar(true);

        // Pro only feature
        Log.bindCrashProtection(true);

        addNetworkErrorListener(err -> {
            // prevent the event from propagating
            err.consume();
            if(err.getError() != null) {
                Log.e(err.getError());
            }
            Log.sendLogAsync();
            Dialog.show("Connection Error", "There was a networking error in the connection to "
                     + err.getConnectionRequest().getUrl(), "OK", null);
        });
    }

    public void start() {
        if(current != null){
            current.show();
            return;
        }


        UIBuilder UIB = new UIBuilder () ;
        UIBuilder.registerCustomComponent("ImageViewer",ImageViewer.class);
        Container ct = UIB.createContainer(theme, "GUI 1");
        Form f=(Form) ct;

            f.show();
       }

    public void stop() {
        current = getCurrentForm();
        if(current instanceof Dialog) {
            ((Dialog)current).dispose();
            current = getCurrentForm();
        }
    }

    public void destroy() {}

}