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Snackbar extensions on Kotlin, to create a useful small DSL.
class HomeActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_home)
setSupportActionBar(toolbar)
fab.setOnClickListener {
it.snack("Snack message") {
action("Action") { toast("Action clicked") }
}
}
}
}
inline fun View.snack(@IntegerRes messageRes: Int, length: Int = Snackbar.LENGTH_LONG, f: Snackbar.() -> Unit) {
snack(resources.getString(messageRes), length, f)
}
inline fun View.snack(message: String, length: Int = Snackbar.LENGTH_LONG, f: Snackbar.() -> Unit) {
val snack = Snackbar.make(this, message, length)
snack.f()
snack.show()
}
fun Snackbar.action(@IntegerRes actionRes: Int, color: Int? = null, listener: (View) -> Unit) {
action(view.resources.getString(actionRes), color, listener)
}
fun Snackbar.action(action: String, color: Int? = null, listener: (View) -> Unit) {
setAction(action, listener)
color?.let { setActionTextColor(color) }
}
@LouisCAD

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@LouisCAD LouisCAD commented Nov 25, 2016

Hey, you should replace the @IntegerRes annotations with @StringRes ones.

@alwarren

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@alwarren alwarren commented Mar 8, 2018

setActionTextColor needs to use a ColorInt. With the current support library, you can use this:

fun Snackbar.action(action: String, color: Int? = null, listener: (View) -> Unit) {
    setAction(action, listener)
    color?.let { setActionTextColor(ContextCompat.getColor(context, color)) }
}
@webserveis

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@webserveis webserveis commented Jan 30, 2020

All changes:

import android.view.View
import androidx.annotation.StringRes
import androidx.core.content.ContextCompat
import com.google.android.material.snackbar.Snackbar

inline fun View.snack(@StringRes messageRes: Int, length: Int = Snackbar.LENGTH_LONG, f: Snackbar.() -> Unit) {
    snack(resources.getString(messageRes), length, f)
}

inline fun View.snack(message: String, length: Int = Snackbar.LENGTH_LONG, f: Snackbar.() -> Unit) {
    val snack = Snackbar.make(this, message, length)
    snack.f()
    snack.show()
}

fun Snackbar.action(@StringRes actionRes: Int, color: Int? = null, listener: (View) -> Unit) {
    action(view.resources.getString(actionRes), color, listener)
}

fun Snackbar.action(action: String, color: Int? = null, listener: (View) -> Unit) {
    setAction(action, listener)
    color?.let { setActionTextColor(ContextCompat.getColor(context, color)) }
}
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