The lack of reliable internet connectivity may occur in places such as remote locations, disaster areas, or areas where only limited forms of internet access are supported. We propose a Bluetooth-based offline communication framework for Android devices as a potential solution. The framework allows users to send and receive messages directly between adjacent devices without having to rely on either WiFi or cellular network connectivity, thus removing the need for local infrastructure, including routers. The framework establishes adaptable short-range communication links and quickly discovers devices to establish secure connections and transfer data seamlessly using either Bluetooth Classic or Bluetooth Low Energy (BLE) technology. Due to its modular architecture, the framework can easily be integrated with a variety of real-world applications such as emergency communications, on-site coordination, rural connectivity, and closed-campus chat systems through the device discovery, connection handling, message transfer, and data synchronization modules that are all part of the framework. The framework has demonstrated an ability to function across multiple models of Android devices with very low latency, stable data transfers and use very little energy from the battery. In many cases, the Bluetooth-based offline communication solution presented here could act as a viable and scalable offline communication solution in instances where access to traditional networks is not available or feasible.