How to set a shadow effect on text in a TextView in Kotlin Android

How to set a shadow effect on text in a TextView in Kotlin Android.

Here's a step-by-step tutorial on how to set a shadow effect on text in a TextView in Kotlin Android:

Step 1: Create a new Android project in your preferred IDE (e.g., Android Studio) and open the layout file where you want to add the TextView.

Step 2: Add a TextView element to your layout file. You can do this by opening the XML file for your layout (activity_main.xml by default) and adding the following code:

<TextView
    android:id="@+id/textView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Hello, World!"
    android:textSize="24sp"
    android:textColor="#000000"
    />

Step 3: Open the Kotlin file corresponding to your layout file (e.g., MainActivity.kt).

Step 4: Inside the onCreate method, find the TextView using its ID and assign it to a variable. You can do this by adding the following code:

val textView = findViewById<TextView>(R.id.textView)

Step 5: Set the shadow effect on the TextView by calling the setShadowLayer method on the TextView variable. This method takes three parameters: radius, dx, and dy. The radius parameter specifies the blur radius of the shadow, while dx and dy specify the horizontal and vertical offset of the shadow, respectively. You can add the following code to set a shadow with a blur radius of 10 pixels and an offset of 5 pixels in both the horizontal and vertical directions:

textView.setShadowLayer(10f, 5f, 5f, Color.BLACK)

Step 6: Save your changes and run the app on an emulator or a physical device. You should now see the text in the TextView with a shadow effect.

Here's the complete code for MainActivity.kt:

import android.graphics.Color
import android.os.Bundle
import android.widget.TextView
import androidx.appcompat.app.AppCompatActivity

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        val textView = findViewById<TextView>(R.id.textView)
        textView.setShadowLayer(10f, 5f, 5f, Color.BLACK)
    }
}

That's it! You have successfully set a shadow effect on text in a TextView in Kotlin Android. You can customize the shadow effect by adjusting the parameters passed to the setShadowLayer method according to your requirements.