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App Inventor 2开发计步器与定位器 - App Inventor 2 中文网 - 清泛IT论坛，有思想、有深度
...数据持久化，掌握数据存储等功能的实现；
3.通过编程实践，感受和体验利用手机自身硬件开发实用的手机应用程序。 【项目范例】
1. 情境
现在的手机都已经具有计步器及位置传感器等各种硬件传感器，利...
How to check if Location Services are enabled?
... return LocationManagerCompat.isLocationEnabled(locationManager);
}
In Kotlin
private fun isLocationEnabled(context: Context): Boolean {
val locationManager = context.getSystemService(Context.LOCATION_SERVICE) as LocationManager
return LocationManagerCompat.isLocationEnabled(locationMan...
Limit Decimal Places in Android EditText
...n also restrict digits before decimal point using length filter like this. Kotlin : edtAnyAmount.filters = arrayOf<InputFilter>(InputFilter.LengthFilter(7),DecimalDigitsInputFilter(2))
– Faldu Jaldeep
May 15 '19 at 10:15
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How to manage startActivityForResult on Android?
...t
To implement passing data between two activities in much better way in Kotlin please go through this link 'A better way to pass data between Activities'
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Reasons that the passed Intent would be NULL in onStartCommand
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in kotlin, the intent is marked as not-null, and it crashes the app override fun onStartCommand(intent: Intent, flags: Int, startId: Int): Int {}
– Muhammad Naderi
Apr 10 '18 at 5:08
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How do I add a new sourceset to Gradle?
...uring integration tests
Example 14 and 15 for details (both for Groovy and Kotlin DSL, either which one you prefer)
alt: "current" Gradle doc link at 2, but might defer in future, you should have a look at if examples changes)
for Gradle 4 have a look at ancient version 3 which is close near to w...
How to Copy Text to Clip Board in Android?
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As a handy kotlin extension:
fun Context.copyToClipboard(text: CharSequence){
val clipboard = getSystemService(Context.CLIPBOARD_SERVICE) as ClipboardManager
val clip = ClipData.newPlainText("label",text)
clipboard.primary...
How to get the absolute coordinates of a view
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First Way:
In Kotlin we can create a simple extension for view:
fun View.getLocationOnScreen(): Point
{
val location = IntArray(2)
this.getLocationOnScreen(location)
return Poi
Is it possible dynamically to add String to String.xml in Android?
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In Kotlin you just need to set your string value like this:
<string name="song_number_and_title">"%1$d ~ %2$s"</string>
Create a text view on your layout:
<TextView android:id="@+id/song_number_and_title"/>...
Can't create handler inside thread that has not called Looper.prepare()
...st = Toast.makeText(mContext, "Something", Toast.LENGTH_SHORT);
}
});
KOTLIN
Handler(Looper.getMainLooper()).post {
Toast.makeText(mContext, "Something", Toast.LENGTH_SHORT)
}
An advantage of this method is that you can use it without Activity or Context.
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