Don't load the bitmap after the transfer on my watch.

Hello everybody,

I try (because it's fun) to develop my first watchface. Unfortunately, all the topics, help and tutorials are in English so it's quite complicated following the bug I could have ...

After some days, I finalized an watchface working on ConnectIQ, but after transferred the app on my Forerunner 245, I found a mistake. It seems that the bitmap is not loaded and each time I change what I want to see (go to a menu, an app or whatever) then come back to the clock screen, the last screen stay in font. I don't really understand what it happens. Do you have an idea ?

Thank's for your help.

My code : 

using Toybox.WatchUi as Ui;
using Toybox.Graphics as Gfx;
using Toybox.System as Sys;
using Toybox.Lang as Lang;
using Toybox.Application as App;
using Toybox.Time.Gregorian as Date;
using Toybox.ActivityMonitor as Act;
using Toybox.Activity as Acty;

class WFView extends Ui.WatchFace {
    var myBitmap;

    function initialize() {
        WatchFace.initialize();
        myBitmap = Ui.loadResource(Rez.Drawables.fondWF); 
    }

    function onLayout(dc) {
        dc.clear();
        setLayout(Rez.Layouts.WatchFace(dc));
    }

    function onShow() {
    }

    function onUpdate(dc) {
        dc.clear(); 
        View.onUpdate(dc);
        dc.drawBitmap(0, 0, myBitmap); 

        // Function ClockDisplay
        var clockTime = Sys.getClockTime();
        var timeStringHour = Lang.format("$1$", [clockTime.hour]);
        var timeStringMin = Lang.format("$1$", [clockTime.min.format("%02d")]);

        dc.setColor(Graphics.COLOR_BLUE, Graphics.COLOR_TRANSPARENT);
        dc.drawText(120, 20, Gfx.FONT_SYSTEM_NUMBER_HOT, timeStringHour, Graphics.TEXT_JUSTIFY_CENTER );
        dc.setColor(Graphics.COLOR_WHITE, Graphics.COLOR_TRANSPARENT);
        dc.drawText(120, 130, Gfx.FONT_SYSTEM_NUMBER_HOT, timeStringMin, Graphics.TEXT_JUSTIFY_CENTER ); 

        // Function DateDisplay
        var now = Time.now();
        var date = Date.info(now, Time.FORMAT_LONG);
        var dateString = Lang.format("$1$ $2$", [date.day, date.month]);
        var dayString = Lang.format("$1$", [date.day_of_week]);

        dc.setColor(Graphics.COLOR_DK_GRAY, Graphics.COLOR_TRANSPARENT);
        dc.drawText(120, 0, Gfx.FONT_XTINY, dateString, Gfx.TEXT_JUSTIFY_CENTER );
        dc.setColor(Graphics.COLOR_DK_GRAY, Graphics.COLOR_TRANSPARENT);
        dc.drawText(120, 15, Gfx.FONT_XTINY, dayString, Gfx.TEXT_JUSTIFY_CENTER );
        
    // continued ...

// ... continued
       // Function BatteryDisplay 
        var batteryinfo = Sys.getSystemStats().battery;
        var stats = Sys.getSystemStats();
        var pwr = stats.battery;
        var battery = Lang.format("$1$%",[pwr.format("%2d")]);
        dc.setColor(Graphics.COLOR_DK_GRAY, Graphics.COLOR_TRANSPARENT);
        dc.drawText(120, 220, Gfx.FONT_XTINY, battery, Gfx.TEXT_JUSTIFY_CENTER );

        // Function StepCountDisplay 
        var stepCount = Act.getInfo().steps.toString(); 

        dc.setColor(Graphics.COLOR_WHITE, Graphics.COLOR_TRANSPARENT);
        dc.drawText(40, 100, Gfx.FONT_XTINY, stepCount, Gfx.TEXT_JUSTIFY_CENTER ); 
        dc.setColor(Graphics.COLOR_WHITE, Graphics.COLOR_TRANSPARENT);
        dc.drawText(40, 120, Gfx.FONT_XTINY, "Step", Gfx.TEXT_JUSTIFY_CENTER ); 

 // continued ...

// ... continued

       // Function HeartrateDisplay
        var heartRate = Activity.getActivityInfo().currentHeartRate;
        if(heartRate==null) {
            var HRH=Act.getHeartRateHistory(1, true);
            var HRS=HRH.next();
            if(HRS!=null && HRS.heartRate!= Act.INVALID_HR_SAMPLE){
                heartRate = HRS.heartRate;
            }
        }
        if(heartRate!=null) {
            heartRate = heartRate.toString();
        }
        else{
            heartRate = "--";
        }

        dc.setColor(Graphics.COLOR_WHITE, Graphics.COLOR_TRANSPARENT);
        dc.drawText(200, 100, Gfx.FONT_XTINY, heartRate, Gfx.TEXT_JUSTIFY_CENTER ); 
        dc.setColor(Graphics.COLOR_WHITE, Graphics.COLOR_TRANSPARENT);
        dc.drawText(200, 120, Gfx.FONT_XTINY, "Bpm", Gfx.TEXT_JUSTIFY_CENTER ); 
    }
}