In all online tutorials they are selecting map activity while creating new project but i want to use map activity as additional feature and hence want to create project with main activity. How can i create maps activity after creating new project with main activity?
Not getting an option of creating maps activity after creating project with empty activity
Follow these steps:
Right-click on app -> New -> Activity -> Gallery
Click on Gallery. There you will find Google Map Activity.
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I have an Android app with a main fragment that you can navigate from using navigation graph. Data is loaded when the main fragment is opened. The problem is when I navigate from it and go back the data is loaded again, because fragment is recreated. How is it possible to load data only once?
You can use ViewModel with the app and make a check if the ViewModel is already created do not load the data again
I suggest to you use SingleLiveEvent it will fix your problem please check this
Medium
StackOverFlow
So here's the problem, when I create a new project using Basic Activity template it generates two fragments and every page or tutorial I've seen it's not generated. Is it something normal? How to I to avoid Android Studio creating this two fragments?
That started in version 3.6 of Android Studio. I believe they're trying to promote their Navigation Component, where the principle is to use one single Activity (host) and many Fragments (for all the other screens of the app).
As the other answers have suggested, you can either select "Empty Activity" instead or delete these fragments after they're created.
My suggestion would be to try and learn about the new Navigation Component, as it might become the new Standard in the near future.
I honestly don't know why Android Studio does that but if you want just one activity you can start with "Empty Activity" Or just "Add No Activity" option. And then add an activity with the App->New->Activity->Empty Activity.
I'm working with the AppNext ads SDK and I found inside the Interstitial ad a display function that calls startActivity (new Intent (this.context, InterstitialActivity.class)).
InterstitialActivity extends the AppnextActivity class, which in turn extends Activity.
My question is: How could they start its activity without registering the InterstitialActivity class at the Manifest?
Android SDK permits merging manifests from multiple sources, including any libraries you depend on for your project. This way, such Android libraries could register their components like Activity or Service without the app developer touching the main AndroidManifest.xml at all.
This link: http://www.kind-kristiansen.no/2010/android-adding-desktop-shortcut-support-to-your-app/ teaches me how to create a shortcut to any of my app's activities. However, when you look at your phone's shortcuts list, you see that apps like settings have a whole bunch of shortcuts. So there's my question: How do you add multiple shortcuts to the shortcut list?
You can have as many shortcuts for an App, as many public intents are declared in its manifest. The Activity in example is returning only one Intent and finishing on the spot. You can have your Shortcut Activity show a list of all available intents of your app and return that intent in its result.
I have defined some common Activities in a library project and want to reuse these activity in my working project.
I declared my library project as Android library, use the fully-qualified name of the Activities and declare them in the AndroidManifest.xml of the new project. However, I get 'Unable to find explicit activity class' error when launching the application.
Any other configurations shall I do in order to start the Activities?
Either your activity is not in your manifest, or there is some problem with your library project causing the activity class to not be included in the APK.
You need to use Implicit Intent and Intent Filters, check this blog entry and the android documentation for more information.
I have made a very simple sample (quick and dirty but working here): http://dl.dropbox.com/u/5289718/DummyIntent.zip