Edit: I understand why this happens that wasn’t my point. My point is that it at least needs to give a warning or call the notifyDataSetChanged() function. Because apparently I am calling the submitList(…) function for a reason. I am pretty sure people are trying to figure out what went wrong for hours until they … Read more
To get a bulk insert with Spring Boot and Spring Data JPA you need only two things: set the option spring.jpa.properties.hibernate.jdbc.batch_size to appropriate value you need (for example: 20). use saveAll() method of your repo with the list of entities prepared for inserting. Working example is here. Regarding the transformation of the insert statement into … Read more
It’s not recommended but you can access to database on main thread with allowMainThreadQueries() MyApp.database = Room.databaseBuilder(this, AppDatabase::class.java, “MyDatabase”).allowMainThreadQueries().build()
You’re getting crashes because you initialize those variables in one Activity, and expect it to be set always, in the other Activity. But Android doesn’t work like that, you can easily end up crashing because after low memory condition happens, only the current Activity gets recreated at first, previous Activity is recreated on back navigation, … Read more
There is no question that the future of parsing in Kotlin will be with kotlinx.serialization. It is part of Kotlin libraries. Version kotlinx.serialization 1.0 is finally released https://github.com/Kotlin/kotlinx.serialization import kotlinx.serialization.* import kotlinx.serialization.json.JSON @Serializable data class MyModel(val a: Int, @Optional val b: String = “42”) fun main(args: Array<String>) { // serializing objects val jsonData = JSON.stringify(MyModel.serializer(), … Read more
I know of enabling or disabling wifi: WifiManager wifiManager = (WifiManager)this.context.getSystemService(Context.WIFI_SERVICE); wifiManager.setWifiEnabled(status); where status may be true or false as per requirement. Edit: You also need the following permissions in your manifest file: <uses-permission android:name=”android.permission.ACCESS_WIFI_STATE”/> <uses-permission android:name=”android.permission.CHANGE_WIFI_STATE”/>
You do not need any formatter to parse your input string You input string, 2006-03-25T10:30:00+12:00 is already in the default format used by OffsetDateTime#parse and therefore, you do not need to use a formatter explicitly in order to parse your input date-time string. m specifies the minute while M specifies the month You have wrongly … Read more
As @Vadzim said, in IntelliJ or Android Studio, you just have to do the following to get java code from kotlin: Menu > Tools > Kotlin > Show Kotlin Bytecode Click on the Decompile button Copy the java code Update: With a recent version (1.2+) of the Kotlin plugin you also can directly do Menu … Read more
Try: import android.os.Vibrator; … Vibrator v = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE); // Vibrate for 500 milliseconds if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) { v.vibrate(VibrationEffect.createOneShot(500, VibrationEffect.DEFAULT_AMPLITUDE)); } else { //deprecated in API 26 v.vibrate(500); } Note: Don’t forget to include permission in AndroidManifest.xml file: <uses-permission android:name=”android.permission.VIBRATE”/>
First, you should read all about Null Safety in Kotlin which covers the cases thoroughly. In Kotlin, you cannot access a nullable value without being sure it is not null (Checking for null in conditions), or asserting that it is surely not null using the !! sure operator, accessing it with a ?. Safe Call, … Read more