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How do I get the file extension of a file in Java?
...;
Gradle Groovy DSL
implementation 'commons-io:commons-io:2.6'
Gradle Kotlin DSL
implementation("commons-io:commons-io:2.6")
Others https://search.maven.org/artifact/commons-io/commons-io/2.6/jar
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How do I detect if I am in release or debug mode?
... ( getApplicationInfo().flags & ApplicationInfo.FLAG_DEBUGGABLE ) );
Kotlin:
val isDebuggable = 0 != applicationInfo.flags and ApplicationInfo.FLAG_DEBUGGABLE
It is taken from bundells post from here
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How to run a method every X seconds
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With Kotlin, we can now make a generic function for this!
object RepeatHelper {
fun repeatDelayed(delay: Long, todo: () -> Unit) {
val handler = Handler()
handler.postDelayed(object : Runnable {
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How to get the build/version number of your Android application?
... your app as "1.0" or "2.5" or "2 Alpha EXTREME!" or whatever.
Example:
Kotlin:
val manager = this.packageManager
val info = manager.getPackageInfo(this.packageName, PackageManager.GET_ACTIVITIES)
toast("PackageName = " + info.packageName + "\nVersionCode = "
+ info.versionCode + "\n...
To draw an Underline below the TextView in Android
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5 Amazing Ways To Underline A TextView In Android - Kotlin/Java & XML
String html = "<u>Underline using Html.fromHtml()</u>";
textview.setText(Html.fromHtml(html));
But Html.fromHtml(String resource) was deprecated in API 24.
So you can use the latest andr...
Android and in TextView
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In Kotlin, it works very well. I replace all the empty spaces with this, and it will ellipsize from the last characters. str.replace(" ", "\u00A0") yields, "Hello wor..." instead of "Hello..."
– Seop Yoon...
Java equivalent to C# extension methods
...ement in Java (by "Java" I assume you mean bytecode that runs on a JVM)... Kotlin, which compiles to bytecode has extensions. It is just syntactic sugar over static methods. You can use the decompiler in IntelliJ to see what the equivalent Java looks like.
– Jeffrey Blattman
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Fade In Fade Out Android Animation in Java
....addAnimation(fadeOut);
this.setAnimation(animation);
If you are using Kotlin
val fadeIn = AlphaAnimation(0f, 1f)
fadeIn.interpolator = DecelerateInterpolator() //add this
fadeIn.duration = 1000
val fadeOut = AlphaAnimation(1f, 0f)
fadeOut.interpolator = AccelerateInterpolator() //and this
fad...
Can I have onScrollListener for a ScrollView?
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You can use NestedScrollView instead of ScrollView. However, when using a Kotlin Lambda, it won't know you want NestedScrollView's setOnScrollChangeListener instead of the one at View (which is API level 23). You can fix this by specifying the first parameter as a NestedScrollView.
nestedScrollVie...
Android AlertDialog Single Button
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Kotlin?
val dialogBuilder = AlertDialog.Builder(this.context)
dialogBuilder.setTitle("Alert")
.setMessage(message)
.setPositiveButton("OK", null)
.create()
.sho...