In this android example, we will see how to work with shared preferences in Android Studio by using Kotlin Language. SharedPreferences is an interface for accessing and updating preference data. It deals with objects that point to a file containing key-value pairs and provides methods for reading and writing them. SharedPreferences can be used to store basic types (Int, Float, Long, Boolean, String, and Set of Strings). Implementation: Step 1: Create a new Project in android studio. Step 2: Go to activity_main.xml file and add the following code <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" <EditText <Button <Button Step 3: Open MainActivity.kt file and add the following code. lateinit var shared : SharedPreferences override fun onCreate(savedInstanceState: Bundle?) { shared = getSharedPreferences("Test" , Context.MODE_PRIVATE) save.setOnClickListener { show.setOnClickListener { txt.text = shared.getString("txt" , "No imported" ) } Step 4: Run the app on emulator or real device, you will get the output as given below Complete Source Code of Shared Preferences Example : activity_main.xml file <?xml version="1.0" encoding="utf-8"?> <EditText <Button <Button MainActivity.kt file import android.content.Context class SPActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { shared = getSharedPreferences("Test" , Context.MODE_PRIVATE) save.setOnClickListener { show.setOnClickListener { txt.text = shared.getString("txt" , "No imported" ) } Conclusion: In this article we have covered how to deal with Shared Preferences in Android Studio by using Kotlin Language.
Go to File > New > New Project > Empty Activity > Next > Enter Name > Select Language Kotlin > Finish
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:orientation="vertical"
tools:context=".MainActivity">
<TextView
android:id="@+id/txt"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:padding="10dp"
android:textColor="#101010"
android:textSize="25sp"/>
android:id="@+id/edt"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Enter a Text"
android:layout_margin="10dp"
android:textColor="#101010"/>
android:id="@+id/save"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Save"
android:layout_margin="10dp"/>
android:id="@+id/show"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Show"
android:layout_margin="10dp"/>
</LinearLayout>
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_spactivity)
val save = findViewById(R.id.save)
val show = findViewById(R.id.show)
val edt = findViewById(R.id.edt)
val txt = findViewById(R.id.txt)
val edit = shared.edit()
edit.putString("txt" , edt.text.toString())
Toast.makeText(this , "Data Saved" , Toast.LENGTH_SHORT).show()
edit.apply()
}
Toast.makeText(this , shared.getString("txt" , "No imported" ) , Toast.LENGTH_SHORT).show()
}
OUTPUT:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:orientation="vertical"
tools:context=".MainActivity">
<TextView
android:id="@+id/txt"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:padding="10dp"
android:textColor="#101010"
android:textSize="25sp"/>
android:id="@+id/edt"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Enter a Text"
android:layout_margin="10dp"
android:textColor="#101010"/>
android:id="@+id/save"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Save"
android:layout_margin="10dp"/>
android:id="@+id/show"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Show"
android:layout_margin="10dp"/>
</LinearLayout>
import android.content.SharedPreferences
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.widget.*
lateinit var shared : SharedPreferences
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
val save = findViewById(R.id.save)
val show = findViewById(R.id.show)
val edt = findViewById(R.id.edt)
val txt = findViewById(R.id.txt)
val edit = shared.edit()
edit.putString("txt" , edt.text.toString())
Toast.makeText(this , "Data Saved" , Toast.LENGTH_SHORT).show()
edit.apply()
}
Toast.makeText(this , shared.getString("txt" , "No imported" ) , Toast.LENGTH_SHORT).show()
}
}
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