android:gravity
android:gravity=”value” android:gravity lets you say where you want the view’s contents to appear inside the view…
android:layout_gravity
android:layout_gravity lets you say where you want views to appear in their available space. android:layout_gravity deals…
LinearLayout
How you specify a linear layout You specify a linear layout using <LinearLayout>. You must specify…
The State of an activity
When Android creates and destroys an activity, the activity moves from being launched to running to…
Handlers allow you to schedule code
In non-Android Java, you can perform tasks like using a background thread. In Android, that approach…
AndroidManifest.xml
Every Android app must include a file called AndroidManifest.xml. You can find it in the app/src/main…
Use a custom Class in Android Studio
Add a cutom class to an Android project by going to File menu -> New ->…
findViewById()
We can get references for our two GUI components using a method called findViewById(). This method…
String Resource Files
string.xml is the default resource file used to hold name/value pairs of Strings sot that they…
Static variables
A static variables value is the same for aALL instances of the class…The static duckCount variable…