|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)
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)
This is the reason why I have set the minimum version to be 10.