I have posted this question previously但答案並不適用。提供的解決方案只是在自定義按鈕具有焦點和不重點時更改圖片。假設在我的應用程序中,如果用戶點擊了customButton,我需要更改圖片,我通過調用相同的屏幕(例如UiApplication.getUiApplication()。pushScreen(new Screen2(b));)來完成此操作。 Screen2是保存customButton的屏幕。在點擊evevt我米通過傳遞變量pic_status推動相同的屏幕,決定哪個圖片在新屏幕CustomButton中繪製。有沒有什麼辦法可以在點擊事件中更新CustomButtonField中的圖片,而不必一再推動同一個屏幕。如何在點擊事件中更改CustomButtonField的圖片?
//code in Screen2
public void fieldChanged(Field field, int context)
{
if(field == bf1)
{
if(pic_status == 0)
{
pic_status=1;
}
UiApplication.getUiApplication().pushScreen(new Screen2(pic_status));
}
//code in CustomButtonField
CustomButtonField(String label,int pic_status,long style)
{
super(style);
this.label = label;
this.labelHeight = getFont().getHeight();
this.labelWidth = getFont().getAdvance(label);
this.notice = s;
if(pic_status ==0)
{
currentPicture1 = onPicture;
currentPicture2 = onPicture;
}
if(pic_status ==1)
{
currentPicture1 = clickPicture;
currentPicture2 = onPicture;
}
if(pic_status==2)
{
currentPicture1 = onPicture;
currentPicture2 = clickPicture;
}
}
我需要一種方法來更新customButtonField文字和圖片的ButtonClick事件不是聚焦/無焦點的事件,而不連連推同一屏幕。如果我對上述問題的描述不盡如人意,請在下面添加註釋n我可以給出更詳細的解釋我的問題?
所以這是一個http://stackoverflow.com/questions/6517411/about-custombuttonfield-in-blackberry –