Injecting into superclass when only subclass is modified.

[lhunath]

Given a class hierarchy like so:

class A { @Bind(R.id.a) View viewA; { ButterKnife.inject(this) } }

class B extends A { @Bind(R.id.b) View viewB; }

Where A and B exist in their own file, A.java and B.java, when you modify B.java without modifying A.java, you end up with viewA being null at runtime.

I use the following ANT build script to ensure all classes that include @Bind annotations are included for each build. This is not ideal but avoids the issue.

<project basedir=".">
    <description>
        Fix ButterKnife bug caused by the compiler not including unmodified @Bind classes.
    </description>

    <target name="prebuild" description="Ensure the right source files are added to the build">
        <touch>
            <fileset dir="../source/java">
                <contains text="@Bind" />
            </fileset>
        </touch>
    </target>
</project>

I'm not sure if a bug exists for this issue already; but it's likely related to #362

[tasomaniac]

I am just curious. When you do a clean build, does it work or is it always null?

[lhunath]

Works just fine from a clean build. The issue only happens when the build is done using only the subclass.

Modifying both the subclass and the superclass files also doesn't trigger this bug.

[YiiGuxing]

don't use 'com.android.tools.build:gradle:2.0-xxx'.
#438

[JakeWharton]

This is a dupe of #31. Maybe we can write out superclass details into a non-Java file to be read across invocations?