Storing simple data
It's a common requirement to store simple data, and Android makes it simple using the Preferences API. It's not limited to just user preferences either; you can store any of the primitive data types using a name/value pair.
We'll demonstrate saving a name from an EditText and displaying it when the application starts. The following screenshots shows how the application looks the first time with no saved name:
This is an example of how it looks after saving a name:
Getting ready
Create a new project in Android Studio and call it Preferences. Use the default Phone & Tablet options and select Empty Activity in the Add an Activity to Mobile dialog.
How to do it...
We'll use the existing TextView to display a Welcome back message and create a new EditText button to save the name. Start by opening activity_main.xml:
- Replace the existing
TextViewwith the following new views:
<TextView android:id="@+id/textView" android:layout_width="wrap_content" android:layout_height="wrap_content...
