I'm using libgdx in my game and I want to catch android back button.
I want this scenario:
I have three screens: Screen1, Screen2 and Screen3. When I'm on Screen3 and I press back button on android I want to open Screen2 screen, but in my case all app exit (Closes all sceens 1,2 and 3). I'm using this code:
#Override
public void show() {
backButtonPressed = false;
Gdx.input.setCatchBackKey(true);
}
#Override
public void hide() {
Gdx.input.setCatchBackKey(false);
}
#Override
public void render(float deltaTime) {
if (Gdx.input.isKeyPressed(Keys.BACK) && !backButtonPressed){
ScreenTransition transition = ScreenTransitionFade.init(0.5f);// init(0.5f, ScreenTransitionSlice.UP_DOWN, 10, Interpolation.pow5Out);
game.setScreen(new Screen2(), transition);
backButtonPressed = true;
}
}
The same code in Screen3 and Screen2 (new Screen1() and new Screen2())
Thanks
See catchbackkey not working (libgdx) Android for the solution - the short version is that you should be hooking isKeyUp
Related
Testing my libGDX app in RoboVM, I have encountered a major problem. When I pause my app (by actually going to the Home screen or sending app invites via Facebook) and then return to my app, classes of my games disappear. As if it does not store data properly on the resume() method. First i though it there was a problem of my AssetLoader, but after some debugging I found that the situation is worse. Actual instances of classes and shapes disappear. As if they never existed.
After googling the issue, I found that it might be related to IOSGraphics, but I have not managed to fix the problem.
My IOSLauncher looks something like this, I have erased the Facebook & Google AdMob specific code.
protected IOSApplication createApplication() {
IOSApplicationConfiguration config = new IOSApplicationConfiguration();
config.useAccelerometer = true;
config.useCompass = true;
config.orientationPortrait = true;
config.orientationLandscape = false;
return new IOSApplication(new Game(this), config);
}
#Override
public boolean didFinishLaunching(UIApplication application,
UIApplicationLaunchOptions launchOptions) {
FBSDKApplicationDelegate.getSharedInstance().didFinishLaunching(application, launchOptions);
initialize();
return true;
}
public void initialize() {
//...
}
public static void main(String[] argv) {
NSAutoreleasePool pool = new NSAutoreleasePool();
UIApplication.main(argv, null, IOSLauncher.class);
pool.close();
}
#Override
public void showAds(boolean show) {
//...
}
#Override
public void shareOnFacebook() {
//...
}
#Override
public void inviteFriends() {
//....
}
#Override
public boolean openURL(UIApplication application, NSURL url,
String sourceApplication, NSPropertyList annotation) {
super.openURL(application, url, sourceApplication, annotation);
return FBSDKApplicationDelegate.getSharedInstance().openURL(
application, url, sourceApplication, annotation);
}
#Override
public void didBecomeActive(UIApplication application) {
super.didBecomeActive(application);
FBSDKAppEvents.activateApp();
}
#Override
public void willResignActive(UIApplication application) {
super.willResignActive(application);
}
#Override
public void willTerminate(UIApplication application) {
super.willTerminate(application);
}
}
This sounds similar to a threading bug I once encountered. I fixed it by deferring resize and resume but I'm not sure if it will help in your case. Something like this:
private boolean needResize, needResume;
private void resize (int width, int height){
needResize = true;
}
private void deferredResize ();
if (!needResize) return;
needResize = false;
int width = Gdx.graphics.getWidth();
int height = Gdx.graphics.getHeight();
//move your resize code here
}
private void resume (){
needResume = true;
}
private void deferredResume (){
if (!needResume) return;
needResume = false;
//move your resume code here
}
public void render (){
deferredResize();
deferredResume();
//...
}
I suggest that you start looking for an alternative to RoboVM to avoid more issues in the future, as Robovm was acquired by Microsoft Xamarin (sad but true) and the framework is no longer maintained. License keys (with Libgdx) will continue to work until the 17th of April 2017, there will be no further updates to RoboVM, be it new features or bug fixes.
As far as I know, Libgdx will switch to Multi-OS engine as the default iOS backend for newly created libGDX projects in the next couple of weeks.
After a couple of days filled with headache I found the solution!
LifeCycle methods like pause & resume, hide & show are not always called When they are supposed to be called, therefore data is not stored properly. This issue can completely break your game.
This thing only occurred when testing my game on the iOS platform, mainly when I opened a 3rd party app, Facebook in this case. No such thing found on Android, though.
The only thing I changed on the iOS version was calling the mentioned methods manually to make sure it always pauses and resumes when it has to.
I am creating an android app (lollipop version). App shows large logo in middle of splash screen. Login screen contains a small sized logo at top. I use ActivityOptions.makeSceneTransitionAnimation() to set animation from large logo of splash screen to small logo of login screen.
Splash screen launches to launch app. After delay of few milisec , splash screen creates intent for login screen. Also set transition. Then it starts login activity. It begins transition animation of logo. And shows login screen successfully. Everything is working well and animation is smooth up to this point.
Then I added "finish();" in splash screen so that back button on login screen do not loads splash screen. Now transition was giving flicker.
I tried following approach but still flicker is there.
used "finishAfterTransition();" instead of "finish();"
added FLAG_ACTIVITY_CLEAR_TOP and FLAG_ACTIVITY_NEW_TASK flags to intent (this leads to even wired behavior)
Override onBackPressed() in login screen. and added
finish();
android.os.Process.killProcess(android.os.Process.myPid()); - This terminates app but restarts it again.
Here, I'm pasting the code of splashScreen. This code is working but gives flicker while transition. gotoLoginScreen() method at the end of class is the place which loads login activity. The login screen is basic activity template from android studio. Using com.android.support:appcompat-v7:21.0.2 library to support lower devices.
public class SplashActivity extends ActionBarActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_splash);
if (savedInstanceState == null) {
getSupportFragmentManager().beginTransaction()
.add(R.id.container, new PlaceholderFragment())
.commit();
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_splash, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
ImageView imageView_logo;
public PlaceholderFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_splash, container, false);
imageView_logo = (ImageView) rootView.findViewById(R.id.imageview_logo);
imageView_logo.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
startTimer();
}
});
startTimer();
return rootView;
}
private void startTimer() {
new CountDownTimer(1000, 1000) {
#Override
public void onTick(long l) {
}
public void onFinish() {
launchNextActivity();
}
}.start();
}
/**
* base on session continuity the next activity will be decided and
* launches next activity
*/
private void launchNextActivity() {
if (isSessionContinue()) {
goToHomeScreen();
} else {
goToLoginScreen();
}
}
/**
* checks current user ID, null indicate terminated session
*
* #return true if session is continued and false of session is terminated
*/
private boolean isSessionContinue() {
return false;
}
/**
* directly leads to home screen
*/
private void goToHomeScreen() {
//code to start home screen by skipping login
}
/**
* leads to login screen.
*/
#TargetApi(Build.VERSION_CODES.LOLLIPOP)
**private void goToLoginScreen() {
Intent loginIntent = new Intent(getActivity(), LoginActivity.class);
if (android.os.Build.VERSION.SDK_INT >= 21) {
ActivityOptions options = ActivityOptions.makeSceneTransitionAnimation(getActivity(), imageView_logo, getString(R.string.transition_logo));
getActivity().startActivity(loginIntent, options.toBundle());
getActivity().finishAfterTransition();
} else {
startActivity(loginIntent);
getActivity().finish();
}
}**
}
}
Is there any way to avoid flicker? It is a stain on beauty.
add this to your activity:
private boolean shouldFinish = false;
#Override
public void onStop() {
super.onStop();
if (shouldFinish) {
getActivity().finish();
}
}
and change this:
private void goToLoginScreen() {
shouldFinish = true;
Intent loginIntent = new Intent(getActivity(), LoginActivity.class);
if (android.os.Build.VERSION.SDK_INT >= 21) {
ActivityOptions options = ActivityOptions.makeSceneTransitionAnimation(getActivity(), imageView_logo, getString(R.string.transition_logo));
getActivity().startActivity(loginIntent, options.toBundle());
} else {
startActivity(loginIntent);
}
}
We are creating a web application using Vaadin. Our application contains alot of drag and drop features.
We have an object which is drag-able.
We can click on it to open its menu as well.
Sometimes that when we click that item it behaves as if it is dragged.
When this happens we are unable to open its menu because the component is in dragmode.
All components with the same functionality behave the same however in development environment, when we restart the tomcat the problem disappeared?
I noticed that when the components start showing me this behavior the webpage in FireFox the behavior is fine there?
A simple solution to this could be to introduce a drag mode/edit button which would allow the user to switch the drag mode on and off.
This would mean the user could interact with the components and then enter this "drag mode" when they wished to drag them. Hence reducing the frustration of trying to interact with the component and it starting to "drag" instead.
I've create a simple example program to try out below.
public class DemoUI extends UI {
HorizontalSplitPanel splitPanel;
DragAndDropWrapper wrapperA;
DragAndDropWrapper wrapperB;
DragAndDropWrapper splitPaneWrapper;
Button buttonA;
Button buttonB;
private boolean isDragMode = false;
#WebServlet(value = "/*", asyncSupported = true)
#VaadinServletConfiguration(productionMode = false, ui = DemoUI.class)
public static class Servlet extends VaadinServlet {
}
#Override
protected void init(VaadinRequest request) {
final HorizontalSplitPanel splitPanel = new HorizontalSplitPanel();
Button buttonA = new Button("Button A");
Button buttonB = new Button("Button B");
final DragAndDropWrapper wrapperA = new DragAndDropWrapper(buttonA);
final DragAndDropWrapper wrapperB = new DragAndDropWrapper(buttonB);
final VerticalLayout leftPanel = new VerticalLayout();
final VerticalLayout rightPanel = new VerticalLayout();
DragAndDropWrapper leftPanelWrapper = new DragAndDropWrapper(leftPanel);
DragAndDropWrapper rightPanelWrapper = new DragAndDropWrapper(rightPanel);
buttonA.addClickListener(new ClickListener() {
#Override
public void buttonClick(ClickEvent event) {
Notification.show("Button A was clicked");
}
});
buttonB.addClickListener(new ClickListener() {
#Override
public void buttonClick(ClickEvent event) {
Notification.show("Button B was clicked");
}
});
leftPanelWrapper.setDropHandler(new DropHandler() {
#Override
public void drop(DragAndDropEvent event) {
leftPanel.addComponent(event.getTransferable().getSourceComponent());
}
#Override
public AcceptCriterion getAcceptCriterion() {
return AcceptAll.get();
}
});
rightPanelWrapper.setDropHandler(new DropHandler() {
#Override
public void drop(DragAndDropEvent event) {
rightPanel.addComponent(event.getTransferable().getSourceComponent());
}
#Override
public AcceptCriterion getAcceptCriterion() {
return AcceptAll.get();
}
});
final Button dragMode = new Button("Drag Mode On");
dragMode.addClickListener(new ClickListener() {
#Override
public void buttonClick(ClickEvent event) {
isDragMode = !isDragMode;
if (isDragMode) {
dragMode.setCaption("Drag Mode Off");
wrapperA.setDragStartMode(DragStartMode.WRAPPER);
wrapperB.setDragStartMode(DragStartMode.WRAPPER);
} else {
dragMode.setCaption("Drag Mode On");
wrapperA.setDragStartMode(DragStartMode.NONE);
wrapperB.setDragStartMode(DragStartMode.NONE);
}
}
});
leftPanel.setSizeFull();
rightPanel.setSizeFull();
leftPanelWrapper.setSizeFull();
rightPanelWrapper.setSizeFull();
leftPanel.addComponent(wrapperA);
rightPanel.addComponent(wrapperB);
splitPanel.setFirstComponent(leftPanelWrapper);
splitPanel.setSecondComponent(rightPanelWrapper);
splitPanel.setSizeFull();
VerticalLayout layout = new VerticalLayout();
layout.addComponent(dragMode);
layout.addComponent(splitPanel);
layout.setSizeFull();
this.setContent(layout);
this.setSizeFull();
}
.
All the best.
I am a new game developing with libgdx. I have a problem with Admob ads. When I call "adView.loadAd(adRequest);" my game is slowl, when I start game, FPS ~ 60 , when I call adView.loadAd(adRequest) my game is slowly FPS ~ 30.
Here is my
public class MainActivity extends AndroidApplication implements IActivityRequestHandler {
protected AdView adView;
AdRequest adRequest;
private final int SHOW_ADS = 1;
private final int HIDE_ADS = 0;
protected Handler handler = new Handler() {
#Override
public void handleMessage(Message msg) {
switch (msg.what) {
case SHOW_ADS: {
System.out.println("SHOW ADVIEW");
adView.setVisibility(View.VISIBLE);
break;
}
case HIDE_ADS: {
adView.setVisibility(View.GONE);
break;
}
}
}
};
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Create the layout
RelativeLayout layout = new RelativeLayout(this);
// Do the stuff that initialize() would do for you
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
getWindow().clearFlags(WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN);
// Create the libgdx View
View gameView = initializeForView(new MyGdxGame(this), false);
// Create and setup the AdMob view`enter code here`
adView = new AdView(this, AdSize.BANNER, "XXXXXX"); // Put in your
// secret key
// here
adRequest = new AdRequest();
adView.loadAd(adRequest);
// adView.loadAd(new AdRequest());
// Add the libgdx view
layout.addView(gameView);
// Add the AdMob view
RelativeLayout.LayoutParams adParams = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT,
RelativeLayout.LayoutParams.WRAP_CONTENT);
adParams.addRule(RelativeLayout.ALIGN_PARENT_TOP);
adParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
layout.addView(adView, adParams);
// Hook it all up
setContentView(layout);
}
// This is the callback that posts a message for the handler
#Override
public void showAds(boolean show) {
handler.sendEmptyMessage(show ? SHOW_ADS : HIDE_ADS);
}
}
I read topic Using interstitials from Admob in a Libgdx game for Android, it's slow when dismissing it
but not solution
Please help me if you have a solution.
This is a known issue and at the moment you cant change it.
Post at the libgdx Forum
It has nothing todo with your code. I think
I am using GWT
If You look at my code , When I click on Hide button it clear the pieFlowPanel Panel but when I click on Show button it does not show my PieChart
final Panel panel = RootPanel.get();
final FlowPanel pieFlowPanel = new FlowPanel();
final Runnable onLoadCallback = new Runnable() {
public void run() {
PieChart pie;
// Create a pie chart visualization.
pie = new PieChart(createTable(), createOptions());
pie.addOnMouseOverHandler(createSelectHandler(pie));
// pie.addSelectHandler(createSelectHandler(pie));
pieFlowPanel.add(pie);
panel.add(pieFlowPanel);
}
};
VisualizationUtils.loadVisualizationApi(onLoadCallback, PieChart.PACKAGE);
Button button = new Button("Hide");
Button button2 = new Button("Show");
button.addClickHandler(new ClickHandler() {
#Override
public void onClick(ClickEvent event) {
pieFlowPanel.clear();
}
});
button2.addClickHandler(new ClickHandler() {
#Override
public void onClick(ClickEvent event) {
final Runnable onLoadCallback1 = new Runnable() {
public void run() {
Window.alert("RUN");
PieChart pie;
pie = new PieChart(createTable(), createOptions());
pie.addOnMouseOverHandler(createSelectHandler(pie));
pieFlowPanel.add(pie);
panel.add(pieFlowPanel);
}
};
VisualizationUtils.loadVisualizationApi(onLoadCallback1, PieChart.PACKAGE);
}
});
panel.add(button);
panel.add(button2);
Please suggest me solution ...
Thanks
I had this problem earlier. All my applications that use a customized component based on Visualization API suddenly stop working, even older versions and local deployments.
Then I replace this line:
VisualizationUtils.loadVisualizationApi(onLoadCallback, Blabla.PACKAGE);
with:
VisualizationUtils.loadVisualizationApi(onLoadCallback);
and it works. Still have no idea on what has happened though.