CODEWITHSUNDEEP
javablackberrybrowsernavigation
user806548
user806548

Reputation:

How to go back in browser's history with physical back button?

I'm making an app in which I open a BrowserField and the user can navigate further to links present in the web page. The problem is that when I press the physical back button, the previous screen is presented while I want to present the previous page in the BrowserField itself. How to do that? Is that even possible?

Thanks.

Upvotes: 1

Views: 1713

Answers (2)

alishaik786
alishaik786

Reputation: 3726

Yes It is Possible.

Try this code:

public class NewsBrowserScreen extends MainScreen 
{
int current_index,popup;
String url;
VerticalFieldManager vertical;
BrowserField browserField;
BrowserFieldConfig browserFieldConfig;
BrowserFieldHistory browserFieldHistory;

public NewsBrowserScreen(int current_index,int popup,String url) 
{
    this.current_index=current_index;
    this.popup=popup;
    this.url=url;
    createGUI();
}
private void createGUI()    
{       
    vertical=new VerticalFieldManager(VERTICAL_SCROLL|VERTICAL_SCROLLBAR|HORIZONTAL_SCROLL|HORIZONTAL_SCROLLBAR);
    browserFieldConfig=new BrowserFieldConfig();
    browserFieldConfig.setProperty(BrowserFieldConfig.NAVIGATION_MODE, BrowserFieldConfig.NAVIGATION_MODE_POINTER);     
    browserField=new BrowserField(browserFieldConfig);
    browserFieldHistory=browserField.getHistory();
    vertical.add(browserField);
    add(vertical);
    browserField.requestContent(url);
}
public boolean onClose() 
{
    if(browserFieldHistory.canGoBack())
    {
        browserFieldHistory.goBack();           
        return true;
    }
    else
    {
        browserFieldHistory.clearHistory();
        return super.onClose();
    }   
}
}

Enough;

Upvotes: 1

tipycalFlow
tipycalFlow

Reputation: 7644

You need to use BrowserFieldHistory to go back to previous pages using the canGoBack() and goBack() methods. Just over-ride the keyChar method to control the ESCAPE key input and put your own logic like so:

public boolean keyChar(char key, int status, int time) {
  if ( key == Characters.ESCAPE) {
    if(yourBrowserField.getHistory().canGoBack()){
      yourBrowserField.getHistory().goBack();
    }else{
      UiApplication.getUiApplication().popScreen(this);
      return true;
    }
   }
}

Upvotes: 2

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