Kotlin - Revision history

Chris: /* Instance State */

2017-11-27T00:44:28Z

‎Instance State

2017-11-27T00:44:05Z

2017-11-19T00:35:02Z

‎Lambdas

2017-11-19T00:29:53Z

‎Lambdas

2017-11-18T23:32:56Z

‎Lambdas

2017-11-18T23:32:30Z

‎Lambdas

2017-11-18T23:30:32Z

‎Lambdas

2017-11-18T23:28:01Z

2017-11-18T23:21:07Z

2017-11-18T23:17:08Z

@@ Line 150: / Line 150: @@
+     }
 </pre>
-In this case we need to override onSaveInstanceState and inRestoreInstanceState
+In this case we need to override onSaveInstanceState and onRestoreInstanceState

← Older revision		Revision as of 00:44, 27 November 2017
Line 124:		Line 124:
	}		}
	</pre>		</pre>
		+
		+	=Instance State=
		+	Instance will be lost on rotation unless everything is saved and restored
		+	<pre>
		+	class LeagueActivity : BaseActivity() {
		+
		+	var player = Player("","")
		+
		+	override fun onSaveInstanceState(outState: Bundle?) {
		+	super.onSaveInstanceState(outState)
		+	outState?.putParcelable(EXTRA_PLAYER,player)
		+	}
		+
		+	override fun onRestoreInstanceState(savedInstanceState: Bundle?) {
		+	super.onRestoreInstanceState(savedInstanceState)
		+	if (savedInstanceState != null) {
		+	player = savedInstanceState.getParcelable(EXTRA_PLAYER)
		+	}
		+	}
		+
		+	override fun onCreate(savedInstanceState: Bundle?) {
		+	super.onCreate(savedInstanceState)
		+	setContentView(R.layout.activity_league)
		+	leagueNextBtn.isEnabled = false
		+	}
		+	</pre>
		+	In this case we need to override onSaveInstanceState and inRestoreInstanceState

@@ Line 95: / Line 95: @@
          println(it.color)
          println(it.make)
+     }
 </pre>

@@ Line 56: / Line 56: @@
 <pre>
 val sumA : (Int, Int) -> Int = {x,y -> x + y}
 </pre>

@@ Line 47: / Line 47: @@
 val printMessage = { message: String -> println(message)}
 </pre>
 <pre>

@@ Line 50: / Line 50: @@
 <pre>
 val sumA = {x: Int, y: Int -> x + y}
 </pre>

@@ Line 35: / Line 35: @@
+     }
+}
 </pre>

@@ Line 9: / Line 9: @@
 To override class functions they must also be declared open
 <pre>
-open class Vehicle() {
+open class Vehicle(val make: String, val model: String) {
      open fun drive() {}
+}
-class Car() : Vehicle() {
+class Car(make: String, model: String, val seats: Int) : Vehicle(make, model) {
      override fun drive() {
+     }
+}
 </pre>
 ===Super===

@@ Line 1: / Line 1: @@
 ==Class==
 By default Kotlin classes are final, meaning no classes can inherit from them. In order to make them not final declare them open
 <pre>
 open class Vehicle() {}
 </pre>
 To override class functions they must also be declared open
 <pre>
@@ Line 12: / Line 15: @@
 class Car() : Vehicle() {
      override fun drive() {
+     }
+}
 </pre>