Android Support Annotation 使用 dependencies { compile 'com.android.support:support-annotations:22.2.0' } 或者 compile 'com.android.support:appcompat-v7:23.1.1' 分类 Nullness Annotations @Nullable @NonNull Resource Type Annotations @StringRes @DrawableRes @ColorRes @InterpolatorRes @InterpolatorRes Typedef Annotations @IntDef @StringDef