(For example, the androidos notepad function includes UI and SQlite operations. The function is terminated in three periods, and the end of the file name is_ The file of Solution is a solution, which can be practiced. The code has comments. This material includes the following attachments:
NotepadCodeLab\Notepadv1\res\drawable\icon.png
NotepadCodeLab\Notepadv1\res\layout\notepad_ list.xml
NotepadCodeLab\Notepadv1\res\values\strings.xml
NotepadCodeLab\Notepadv1\src\com\android\demo\notepad1\Notepadv1.java
NotepadCodeLab\Notepadv1\src\com\android\demo\notepad1\NotesDbAdapter.java
NotepadCodeLab\Notepadv1\AndroidManifest.xml
NotepadCodeLab\Notepadv1Solution\res\drawable\icon.png
NotepadCodeLab\Notepadv1Solution\res\layout\notepad_ list.xml
NotepadCodeLab\Notepadv1Solution\res\layout\notes_ row.xml
NotepadCodeLab\Notepadv1Solution\res\values\strings.xml
NotepadCodeLab\Notepadv1Solution\src\com\android\demo\notepad1\Notepadv1.java
NotepadCodeLab\Notepadv1Solution\src\com\android\demo\notepad1\NotesDbAdapter.java
NotepadCodeLab\Notepadv1Solution\AndroidManifest.xml
NotepadCodeLab\Notepadv2\res\drawable\icon.png
NotepadCodeLab\Notepadv2\res\layout\notes_ list.xml
NotepadCodeLab\Notepadv2\res\layout\notes_ row.xml
NotepadCodeLab\Notepadv2\res\layout\note_ edit.xml
NotepadCodeLab\Notepadv2\res\values\strings.xml
NotepadCodeLab\Notepadv2\src\com\android\demo\notepad2\Notepadv2.java
NotepadCodeLab\Notepadv2\src\com\android\demo\notepad2\NotesDbAdapter.java
NotepadCodeLab\Notepadv2\AndroidManifest.xml
NotepadCodeLab\Notepadv2Solution\res\drawable\icon.png
NotepadCodeLab\Notepadv2Solution\res\layout\notes_ list.xml
NotepadCodeLab\Notepadv2Solution\res\layout\notes_ row.xml
NotepadCodeLab\Notepadv2Solution\res\layout\note_ edit.xml
NotepadCodeLab\Notepadv2Solution\res\values\strings.xml
NotepadCodeLab\Notepadv2Solution\src\com\android\demo\notepad2\NoteEdit.java
NotepadCodeLab\Notepadv2Solution\src\com\android\demo\notepad2\Notepadv2.java
NotepadCodeLab\Notepadv2Solution\src\com\android\demo\notepad2\NotesDbAdapter.java
NotepadCodeLab\Notepadv2Solution\AndroidManifest.xml
.....)