Assigning a custom class to an existing class in Silver (Android)

Elements
1

Hi,

I have made a custom ImageView class like this.

public class yazDice: android.widget.ImageView

I am wanting to assign this custom ImageView to an ImageView in MainActivity. I am doing it like this

let diceOne = self.findViewById(R.id.ivDiceOne) as! yazDice

The XML looks like this

<ImageView
    android:id="@+id/ivDiceOne"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:src="@drawable/dice1"
    android:layout_marginTop="16dp"
    android:layout_marginLeft="24dp" />

All compiles OK but when it runs it says it cannot assign ImageView as yazDice.

Any ideas why?

Thanks!

2

The xml is wrong. IIRC you need to do <com.mynamesspace.yazDice android:id="....

3

awesome! can you give an example what that would look like?

<com.mynamesspace.yazDice
android:id="@+id/ivDiceOne"
android:layout_width=“wrap_content”
android:layout_height=“wrap_content”
android:src="@drawable/dice1"
android:layout_marginTop=“16dp”
android:layout_marginLeft=“24dp” />

like this?

4

Yes. See also https://developer.android.com/guide/topics/ui/custom-components.html

If you use swift make sure you use the default namespace (project options) + typename.

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5

Thank you very much Carlo.

6

so like this?

<org.fsxp.yazandroid.yazDice
	android:id="@+id/ivDiceOne"
	android:layout_width="wrap_content"
	android:layout_height="wrap_content"
	android:src="@drawable/dice1"
	android:layout_marginTop="16dp"
	android:layout_marginLeft="24dp" />

or does it need the com.

also, do I need to add the class here?

RelativeLayout xmlns:android=“http://schemas.android.com/apk/res/android”
class=“org.fsxp.yazDice”
android:layout_width=“match_parent”
android:layout_height=“match_parent” >

I only ask because it causing Water to crash and I can’t see any of the errors (I have reported this to Marc)

Thanks!

7

FTR, that crash seems to be unrelated, it’s an uncaught exception in the Java debugger.

8

just to update… the layout above is correct “org.fsxp.yazandroid.yazDice”. Seems the device I was testing it on wasn’t OK. I tested on a different device and got past the previous error. :slight_smile:

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