In this paper, we present a design research study in Mobile Assisted Language Learning (MALL) that emphasizes learner created content and contextualized meaning making. In learning Chinese idioms, students proactively used smartphones on a 1:1 basis to capture photos of the real-life contexts pertaining to the idioms, and to construct sentences with them. Subsequently, in-class or online sharing and discussions on the contexts took place, which would enhance the students' understanding of the proper usage of the idioms. The learning design is grounded in seamless learning that encompasses in-class formal learning and out-of-class informal settings, and personal and social learning spaces. Our analysis of the student artifacts in both product- and process-oriented aspects reveal the students' cognitive process and learning strategies during the course of content creation. The students' ongoing, open-ended, personal-to-social meaning making process and artifacts have shown some indicators of "seamless language learning" that has the potential of transforming language learning into an authentic learning experience. (Contains 1 table and 4 figures.)