MonoPaint v0.91

MonoPaint 0.91 adds PNG export, eraser-end pens, and optional smooth brush edges.

• Pens with an eraser end, like the Staedtler Noris digital jumbo, now erase
  when flipped over, and holding a pen's side button while drawing erases too,
  using the Eraser tool's settings. Your selected tool doesn't change, so the
  regular tip keeps drawing with whatever tool you were using.
• Export PNG: a new menu item saves the current page, or every page, as PNG
  pictures in Pictures/MonoPaint. All pages are numbered from your chosen
  name, like sketch001.png, sketch002.png, and so on. Grays match the
  tablet's shading, and pictures are turned the way you're holding the tablet.
  It asks before replacing earlier exports.
• Smooth brush edges: a new option in Settings gives dry brush strokes and the
  hard eraser soft, anti-aliased edges instead of stair-stepped pixels, so
  exported PNGs look clean. Wet paint was already smooth. It's off by default,
  since it makes drawing slightly laggier.
• The side toolbar always uses large icons; the Medium choice is gone, since
  the buttons were the same size either way.
• Open drawing shows your drawings as a grid of first-page previews, like the
  Pages overview, so you can find a drawing by how it looks.

Download monopaint.apk and follow the sideload instructions.
Update with adb install -r monopaint.apk to preserve drawings and settings.
The application ID and signing identity are unchanged from MonoPaint 0.9.
Android version code 43 allows this release to update 0.9 and earlier builds.

SHA256SUMS contains the APK checksum. This is a signed, non-debuggable release build.