title: Using the app-debug.apk to install on my device
body: <p>I have a problem using the app-debug.apk. The program is running correctly on both the device and the emulator  but if I use the app-debug.apk (from PC) to install it on my device (Galaxy Note 4) or another device, the installation complete and once I try to run it, it gives an error &quot;unfortunately, the app has stopped running&quot;.</p>
  <p>Please note this issue happened after I used poi library to write data to an Excel file. It works correctly, but not if I use app-debug.apk generated on my pc.</p>