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Id

@android:id vs @id

@id

This refers to the ids defined in the application, either in layouts itself using @+id/<id-nam> or in ids.xml. These ids are exposed to Java through R.id.

@android:id

This namespace contains builtin ids from android itself. These ids are exposed to Java through android.R.id.

@android:id vs @id

@id

This refers to the ids defined in the application, either in layouts itself using @+id/<id-nam> or in ids.xml. These ids are exposed to Java through R.id.

@android:id

This namespace contains builtin ids from android itself. These ids are exposed to Java through android.R.id.