set text size programmatically android kotlin
To set the text size programmatically in Android using Kotlin, you can follow these steps:
Get a reference to the TextView: First, you need to obtain a reference to the TextView whose text size you want to set. You can do this by using the
findViewById
method in your activity or fragment.Set the text size: Once you have the reference to the TextView, you can use the
setTextSize
method to set the desired text size. ThesetTextSize
method takes two parameters: the first parameter is the unit of the text size, and the second parameter is the actual size of the text.The unit of the text size can be specified using the constants defined in the
TypedValue
class, such asTypedValue.COMPLEX_UNIT_SP
for scaled pixels,TypedValue.COMPLEX_UNIT_DIP
for density-independent pixels, orTypedValue.COMPLEX_UNIT_PX
for pixels.The size of the text can be specified as a float value representing the desired size in the specified unit.
Apply the changes: Finally, you need to apply the changes to the TextView by calling the
invalidate
method to redraw the TextView with the updated text size.
Here's an example of how you can set the text size programmatically in Kotlin:
val textView = findViewById<TextView>(R.id.textView)
val textSize = 18f // desired text size in scaled pixels
textView.setTextSize(TypedValue.COMPLEX_UNIT_SP, textSize)
textView.invalidate()
In this example, we first obtain a reference to the TextView with the id textView
. Then, we set the text size to 18 scaled pixels using the setTextSize
method. Finally, we call the invalidate
method to apply the changes and redraw the TextView.
Remember to replace R.id.textView
with the actual id of your TextView in your layout file.