|  | I improved the user interface of Semi-Arc on Android.  Now it has an editor and a finder. You can rotate the screen without losing the session (see AndroidManifest.xml).  Typing a right parenthesis shows the corresponding left parenthesis (see EditorWatcher.java).  Semi-Arc on Android with Editor/Finder (in Japanese)
  http://www.oki-osk.jp/esc/llsp/and3.html
 If you modify the AndroidManifest.xml (android:minSdkVersion="10") and compile the source as follows, you might be able to run it on Android of API level 7 and 8.  - - - - -
 However, I am afraid of the bug of old Androids.  In an emulator of API level 7 and 8, the symbol "-" has the value 0 strangely:  Android Development Cheat Sheet (in Japanese)
  http://www.oki-osk.jp/esc/llsp/and-howto.html
 This is the reason why I have set the minimum version to be 10.  http://www.oki-osk.jp/esc/llsp/and1.html#4
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