How to pass null argument in Android Databinding
Why can't pass null value? how can fix it? I can't find any hint from Document.
ERROR
****/ data binding error ****msg:cannot find method onClick(java.lang.Object, java.lang.Object) in class kr.co.app.MyActivity.MyListener file:/Users/jujaeho/projects/app/src/main/res/layout/activity_my.xml loc:24:71 - 24:106 **** data binding error ****
CODE
class MyActivity {
interface MyListener {
fun onClick(abc: ABC?, count: Int?)
}
}
<layout>
<data>
<variable
name="handler"
type="kr.co.app.MyActivity.MyListener" />
</data>
<View
...
android:onClick="@{() -> handler.onClick(null, null)}" />
</layout>
android-databinding
asked Nov 13 '18 at 11:58
illusionJJillusionJJ
123415
add a comment |
Why can't pass null value? how can fix it? I can't find any hint from Document.
ERROR
****/ data binding error ****msg:cannot find method onClick(java.lang.Object, java.lang.Object) in class kr.co.app.MyActivity.MyListener file:/Users/jujaeho/projects/app/src/main/res/layout/activity_my.xml loc:24:71 - 24:106 **** data binding error ****
CODE
class MyActivity {
interface MyListener {
fun onClick(abc: ABC?, count: Int?)
}
}
<layout>
<data>
<variable
name="handler"
type="kr.co.app.MyActivity.MyListener" />
</data>
<View
...
android:onClick="@{() -> handler.onClick(null, null)}" />
</layout>
android-databinding
asked Nov 13 '18 at 11:58
illusionJJillusionJJ
123415
If problem was withnullhandler there should be NPE. But according to posted error, problem is connected to wrong method signature ofMyListenerinterface
– ConstOrVar
Nov 13 '18 at 16:59
add a comment |
Why can't pass null value? how can fix it? I can't find any hint from Document.
ERROR
****/ data binding error ****msg:cannot find method onClick(java.lang.Object, java.lang.Object) in class kr.co.app.MyActivity.MyListener file:/Users/jujaeho/projects/app/src/main/res/layout/activity_my.xml loc:24:71 - 24:106 **** data binding error ****
CODE
class MyActivity {
interface MyListener {
fun onClick(abc: ABC?, count: Int?)
}
}
<layout>
<data>
<variable
name="handler"
type="kr.co.app.MyActivity.MyListener" />
</data>
<View
...
android:onClick="@{() -> handler.onClick(null, null)}" />
</layout>
android-databinding
asked Nov 13 '18 at 11:58
illusionJJillusionJJ
123415
Why can't pass null value? how can fix it? I can't find any hint from Document.
ERROR
****/ data binding error ****msg:cannot find method onClick(java.lang.Object, java.lang.Object) in class kr.co.app.MyActivity.MyListener file:/Users/jujaeho/projects/app/src/main/res/layout/activity_my.xml loc:24:71 - 24:106 **** data binding error ****
CODE
class MyActivity {
interface MyListener {
fun onClick(abc: ABC?, count: Int?)
}
}
<layout>
<data>
<variable
name="handler"
type="kr.co.app.MyActivity.MyListener" />
</data>
<View
...
android:onClick="@{() -> handler.onClick(null, null)}" />
</layout>
android-databinding
android-databinding
asked Nov 13 '18 at 11:58
illusionJJillusionJJ
123415
asked Nov 13 '18 at 11:58
illusionJJillusionJJ
123415
asked Nov 13 '18 at 11:58
illusionJJillusionJJ
123415
asked Nov 13 '18 at 11:58
illusionJJillusionJJ
123415
asked Nov 13 '18 at 11:58
illusionJJillusionJJ
123415
123415
If problem was withnullhandler there should be NPE. But according to posted error, problem is connected to wrong method signature ofMyListenerinterface
– ConstOrVar
Nov 13 '18 at 16:59
add a comment |
If problem was withnullhandler there should be NPE. But according to posted error, problem is connected to wrong method signature ofMyListenerinterface
– ConstOrVar
Nov 13 '18 at 16:59
If problem was with
null handler there should be NPE. But according to posted error, problem is connected to wrong method signature of MyListener interface– ConstOrVar
Nov 13 '18 at 16:59
If problem was with
null handler there should be NPE. But according to posted error, problem is connected to wrong method signature of MyListener interface– ConstOrVar
Nov 13 '18 at 16:59
add a comment |
2 Answers
2
active
oldest
votes
if you are intending to pass null why cannot you assign default value for your onClick method
class MyActivity {
interface MyListener {
fun onClick(abc: ABC?=null, count: Int?=null)
}
}
you can pass nothing if you want to pass null
answered Nov 16 '18 at 10:28
ABrABr
20017
I think android databinding under the Java. So handling default value is some difficult. while we can type@JvmOverloadsabove the method, but this is not allowed in interface.
– illusionJJ
Nov 18 '18 at 9:00
but i am able to pass null to my parameters inside interface. The only difference is that it's a separate file not with inside activity
– ABr
Nov 21 '18 at 6:44
add a comment |
I just encountered this problem today, and what I did basically was to cast the null parameters to the types expected in the method parameters. In your case, this should be something like:
<layout>
<data>
<import type="ABC" /> // just an illustration, specify the full package
<variable
name="handler"
type="kr.co.app.MyActivity.MyListener" />
</data>
<View
...
android:onClick="@{() -> handler.onClick((ABC) null, (int) null)}" />
</layout>
I am not sure about the int casting, but you can try it or use the Integer wrapper class for casting.
answered Jan 5 at 19:11
idrisadetunmbiidrisadetunmbi
386
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
if you are intending to pass null why cannot you assign default value for your onClick method
class MyActivity {
interface MyListener {
fun onClick(abc: ABC?=null, count: Int?=null)
}
}
you can pass nothing if you want to pass null
answered Nov 16 '18 at 10:28
ABrABr
20017
I think android databinding under the Java. So handling default value is some difficult. while we can type@JvmOverloadsabove the method, but this is not allowed in interface.
– illusionJJ
Nov 18 '18 at 9:00
but i am able to pass null to my parameters inside interface. The only difference is that it's a separate file not with inside activity
– ABr
Nov 21 '18 at 6:44
add a comment |
if you are intending to pass null why cannot you assign default value for your onClick method
class MyActivity {
interface MyListener {
fun onClick(abc: ABC?=null, count: Int?=null)
}
}
you can pass nothing if you want to pass null
answered Nov 16 '18 at 10:28
ABrABr
20017
I think android databinding under the Java. So handling default value is some difficult. while we can type@JvmOverloadsabove the method, but this is not allowed in interface.
– illusionJJ
Nov 18 '18 at 9:00
but i am able to pass null to my parameters inside interface. The only difference is that it's a separate file not with inside activity
– ABr
Nov 21 '18 at 6:44
add a comment |
if you are intending to pass null why cannot you assign default value for your onClick method
class MyActivity {
interface MyListener {
fun onClick(abc: ABC?=null, count: Int?=null)
}
}
you can pass nothing if you want to pass null
answered Nov 16 '18 at 10:28
ABrABr
20017
if you are intending to pass null why cannot you assign default value for your onClick method
class MyActivity {
interface MyListener {
fun onClick(abc: ABC?=null, count: Int?=null)
}
}
you can pass nothing if you want to pass null
answered Nov 16 '18 at 10:28
ABrABr
20017
answered Nov 16 '18 at 10:28
ABrABr
20017
answered Nov 16 '18 at 10:28
ABrABr
20017
answered Nov 16 '18 at 10:28
ABrABr
20017
20017
I think android databinding under the Java. So handling default value is some difficult. while we can type@JvmOverloadsabove the method, but this is not allowed in interface.
– illusionJJ
Nov 18 '18 at 9:00
but i am able to pass null to my parameters inside interface. The only difference is that it's a separate file not with inside activity
– ABr
Nov 21 '18 at 6:44
add a comment |
I think android databinding under the Java. So handling default value is some difficult. while we can type@JvmOverloadsabove the method, but this is not allowed in interface.
– illusionJJ
Nov 18 '18 at 9:00
but i am able to pass null to my parameters inside interface. The only difference is that it's a separate file not with inside activity
– ABr
Nov 21 '18 at 6:44
I think android databinding under the Java. So handling default value is some difficult. while we can type
@JvmOverloads above the method, but this is not allowed in interface.– illusionJJ
Nov 18 '18 at 9:00
I think android databinding under the Java. So handling default value is some difficult. while we can type
@JvmOverloads above the method, but this is not allowed in interface.– illusionJJ
Nov 18 '18 at 9:00
but i am able to pass null to my parameters inside interface. The only difference is that it's a separate file not with inside activity
– ABr
Nov 21 '18 at 6:44
but i am able to pass null to my parameters inside interface. The only difference is that it's a separate file not with inside activity
– ABr
Nov 21 '18 at 6:44
add a comment |
I just encountered this problem today, and what I did basically was to cast the null parameters to the types expected in the method parameters. In your case, this should be something like:
<layout>
<data>
<import type="ABC" /> // just an illustration, specify the full package
<variable
name="handler"
type="kr.co.app.MyActivity.MyListener" />
</data>
<View
...
android:onClick="@{() -> handler.onClick((ABC) null, (int) null)}" />
</layout>
I am not sure about the int casting, but you can try it or use the Integer wrapper class for casting.
answered Jan 5 at 19:11
idrisadetunmbiidrisadetunmbi
386
add a comment |
I just encountered this problem today, and what I did basically was to cast the null parameters to the types expected in the method parameters. In your case, this should be something like:
<layout>
<data>
<import type="ABC" /> // just an illustration, specify the full package
<variable
name="handler"
type="kr.co.app.MyActivity.MyListener" />
</data>
<View
...
android:onClick="@{() -> handler.onClick((ABC) null, (int) null)}" />
</layout>
I am not sure about the int casting, but you can try it or use the Integer wrapper class for casting.
answered Jan 5 at 19:11
idrisadetunmbiidrisadetunmbi
386
add a comment |
I just encountered this problem today, and what I did basically was to cast the null parameters to the types expected in the method parameters. In your case, this should be something like:
<layout>
<data>
<import type="ABC" /> // just an illustration, specify the full package
<variable
name="handler"
type="kr.co.app.MyActivity.MyListener" />
</data>
<View
...
android:onClick="@{() -> handler.onClick((ABC) null, (int) null)}" />
</layout>
I am not sure about the int casting, but you can try it or use the Integer wrapper class for casting.
answered Jan 5 at 19:11
idrisadetunmbiidrisadetunmbi
386
I just encountered this problem today, and what I did basically was to cast the null parameters to the types expected in the method parameters. In your case, this should be something like:
<layout>
<data>
<import type="ABC" /> // just an illustration, specify the full package
<variable
name="handler"
type="kr.co.app.MyActivity.MyListener" />
</data>
<View
...
android:onClick="@{() -> handler.onClick((ABC) null, (int) null)}" />
</layout>
I am not sure about the int casting, but you can try it or use the Integer wrapper class for casting.
answered Jan 5 at 19:11
idrisadetunmbiidrisadetunmbi
386
answered Jan 5 at 19:11
idrisadetunmbiidrisadetunmbi
386
answered Jan 5 at 19:11
idrisadetunmbiidrisadetunmbi
386
answered Jan 5 at 19:11
idrisadetunmbiidrisadetunmbi
386
386
add a comment |
add a comment |
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If problem was with
nullhandler there should be NPE. But according to posted error, problem is connected to wrong method signature ofMyListenerinterface– ConstOrVar
Nov 13 '18 at 16:59