there is PopupScreen in my application .. PopupScreen have some Field like BasiceditTextfield and Buttonfield .
when i click on my BasiceditTextfield virtual keyboard open automatically in my 9550 Storm but when i click on Device Menu key nothing happen. i cant hide virtual keyboard ..
how to hide that .?
Use this.
This will enable Menuscreen and disable back key of the device.
protected boolean keyDown(int keycode, int status)
{
if(keycode==1769472)
{
return true;
}
else
{
return false;
}
}
Related
In application, Whenever i move bewteen tabs a full menu, copy, switch application pop up open.
To prevent this i override navigationClick method.
Now pop is not shown. In my second tab i have implemented drop down list. Because i have override navigationClick method when i click on drop down list it is not showing me list of items.
Any idea will be apperciated.
Update:
Here is navigationClick implementation:
public boolean navigationClick(int status, int time) {
return true;
}
Make sure while selecting a tab, no errors occur which probably could be the reason for the menu options to pop up. if this is fixed i guess the subsequent problem will be dissolved!
Out of my experience i have observed the menu pops up in blackberry when a NullPointerException event occurs.
Just check the logs or debug to make sure no exception occurs when you navigate between tabs
If you want to click the labelfield then:
LabelField labelField=new LabelField("Click")
{
protected boolean navigationClick(int status, int time)
{
doLabelFieldClicked();
return true;
}
}
and if Menu option is highlighted then override this:
public boolean onMenu(int instance)
{
return true; //It doesn't show the Menu option.
}
If I am thinking wrong let me know.
I solved this problem by implementing navigationClick() while creating lablelField
tab5 = new LabelField("News", LabelField.FOCUSABLE | LabelField.HIGHLIGHT_SELECT)
{
public boolean navigationClick(int status, int time)
{
return true;
}
};
The spacebar has a default action on many UI fields: click for buttonfield, select/unselect for checkbox, scrolling on a verticalfieldmanager.
My screen has a listfield with more than 20 rows. When the user hits the spacebar, I want the listfield to scroll.
For example, BlackBerry default calendar app, when we hit spacebar, it will scroll down.
and BlackBerry default text Messages, when we hit spacebar, it will scroll down.
is this a default property? or do I need to write code for spacebar key?
You have to create a custom key listener:
private class CustomKeyListener implements KeyListener {
public boolean keyChar(char key, int status, int time) {
if(key == Characters.SPACE){
//TODO handle key here
//WARNING: this code runs on event thread!
return true;
}
return false;
}
public boolean keyDown(int keycode, int time) {
return false;
}
public boolean keyRepeat(int keycode, int time) {
return false;
}
public boolean keyStatus(int keycode, int time) {
return false;
}
public boolean keyUp(int keycode, int time) {
return false;
}
}
Then call Mainscreen.addKeyListener with an instance of your key listener as parameter.
From there you can change your manager (main manager or nested one) scroll with the Manager.setVerticalScroll method. If you want to increment it, you can retrieve the current scroll calling Manager.getVerticalScroll and then add a fixed value. In case you don't have a nested VerticalFieldManager in your screen, you can try with your screen's default, which you can obtain calling Mainscreen.getMainManager.
UPDATE:
For List fields, you can call ListField.getSelectedIndex and ListField.setSelectedIndex to change elements, but this is not an smooth scrolling. But if you placed the list field inside a VerticalFieldManager, you can change the manager scroll as described above.
In my BlackBerry application, I have a home screen. The user can then navigate to a settings screen. When the user goes back to the home screen, is there no method that is called on the home screen indicating that the screen has come to the foreground?
I have tried onFocus() with no avail.
Thanks!
Unfortunately, hooking on the onExposed is not enough. I found that in Blackberry dialogs are also screens and even context menus are screens too. They are pushed on top of your screen so you receive onExposed callback when they are dismissed.
Though it's OK in many cases, in other cases it poses a problem - e.g. if I must refresh the screen's content only when the user returns to it, but not after menus/dialogs, then how do I do that? My case is, unfortunately, one of those.
I found no documented way of detecting "covered"/"uncovered" events. Here is my approach. onCovered/onUncovered callbacks are called when the current screen is covered/uncovered by another screen of the app, but not by dialogs/menus/virtual keyboard:
public class MyAppScreen extends MainScreen {
private boolean isCovered;
protected void onExposed() {
Log.d("onExposed");
super.onExposed();
if (isCovered) {
onUncovered();
isCovered = false;
}
}
protected void onObscured() {
Log.d("onObscured");
super.onObscured();
final Screen above = getScreenAbove();
if (above != null) {
if (isMyAppScreen(above)) {
isCovered = true;
onCovered();
}
}
}
private boolean isMyAppScreen(final Screen above) {
return (above instanceof MyAppScreen);
}
protected void onUncovered() {
Log.d("onUncovered");
}
protected void onCovered() {
Log.d("onCovered");
}
protected void onUiEngineAttached(final boolean attached) {
if (attached) {
Log.d("UI Engine ATTACHED");
} else {
Log.d("UI Engine DETACHED");
}
super.onUiEngineAttached(attached);
}
protected void onFocusNotify(final boolean focus) {
if(focus){
Log.d("focus GAINED");
} else {
Log.d("focus LOST");
}
super.onFocusNotify(focus);
}
}
And a test. Try various combinations and see what events you receive in the log.
public class TestLifecycle extends MyAppScreen implements FieldChangeListener {
private final ABNTextEdit txt1;
private final ButtonField btn1;
private final ButtonField btn2;
public TestLifecycle() {
final Manager manager = getMainManager();
txt1 = new ABNTextEdit();
manager.add(txt1);
btn1 = new ButtonField("Dialog", ButtonField.CONSUME_CLICK);
btn1.setChangeListener(this);
manager.add(btn1);
btn2 = new ButtonField("Screen", ButtonField.CONSUME_CLICK);
btn2.setChangeListener(this);
manager.add(btn2);
}
public void fieldChanged(final Field field, final int context) {
if (field == btn1) {
Dialog.alert("Example alert");
} else if (field == btn2) {
UiApplication.getUiApplication().pushScreen(new TestLifecycle());
}
}
}
Update:
This method has a limitation: if a new screen is pushed when a dialog or the soft keyboard has focus your current screen will not receive onCovered/onUncovered notification.
Example A: if you have an input field of fixed size and you push a new screen when the user completes it, your current screen will not receive the notification if the user types very quickly. This happens because in the moment between you call push(newScreen) and it is actually pushed the user clicks on a letter on soft KB and it grabs the focus. So only onObscured is called, but not onCovered.
Solution: explicitly hide the soft keyboard before the push(newScreen).
Example B: if you have a customized dialog which pushes new screen and then dismisses itself, your current screen will not receive the notification. This happens because your customized dialog is not recognized as a screen, so only onObscured is called, but not onCovered.
Solution: dismiss the dialog in the first place returning a result value, and let your screen push the new screen based on that value. -OR- override isMyAppScreen() to return true also for your customized dialog.
You should be able to use protected void onExposed() to detect when it is displayed again.
I have a problem that popup menu appear when I click a button field. I will solve it by using Buttonfield.consumeclick but it also appears on RichTextField focus. How can I solve this? I am overriding RichTextField method, and that is the reason the popup menu appears.
ButtonField c = new ButtonField("button", FIELD_LEFT | ButtonField.CONSUME_CLICK) {
protected boolean navigationClick(int status, int time) {
Status.show("Button has clicked");
// write your code.
return true;
}
}
I am using NullField() in one of my screen so that the default focus should not be on any of the button . but when i am clicking on the screen where no field is there , menu screen is being displayed. i dont want that menu screen to be poped up tough it should open when i click menu button.
Thanks alot
override method.
protected boolean navigationClick(int status, int time) {
Field focus = UiApplication.getUiApplication().getActiveScreen()
.getLeafFieldWithFocus();
if (focus instanceof NullField) {
return true;
}
return super.navigationClick(status, time);
}
Note:This code is only for giving you hint.