Android Open Source - droidnotes D N Helper

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License

The source code is released under:

GNU General Public License

Java Source Code

package com.example.droidnotes.app;
/*  w  w w. ja  v a  2  s .c om*/
import android.content.*;
import android.database.Cursor;
import android.net.Uri;

public class DNHelper {
    public static String MESSAGE_NOTE_ID = "com.example.droidnotes.app.MESSAGE_NOTE_ID";

    public static Uri BASE_URI = new Uri.Builder()
            .scheme(ContentResolver.SCHEME_CONTENT)
            .authority("com.example.droidnotes.provider")
            .path("notes")
            .build();


    public static Loader<Cursor> getNotesLoader(Context context) {
        Uri contentUri = BASE_URI;
        String[] projection = {DNModel.Notes.ID, DNModel.Notes.NOTE};
        String orderBy = DNModel.Notes.ID + " " + "DESC";

        return new CursorLoader(
                context,
                contentUri,
                projection,
                null,
                null,
                orderBy
        );
    }


    public static void insertNote(Context context, Integer id, String note) {
        assert (id == -1 || id > 0);

        Uri contentUri = BASE_URI;
        ContentValues contentValues = new ContentValues();

        if (id == -1) {
            contentValues.put(DNModel.Notes.NOTE, note);
        } else {
            contentValues.put(DNModel.Notes.ID, id);
            contentValues.put(DNModel.Notes.NOTE, note);
        }

        context.getContentResolver().insert(contentUri, contentValues);
    }

    public static void deleteNote(Context context, Integer id) {
        assert (id > 0);

        Uri contentUri = ContentUris.withAppendedId(BASE_URI, id);

        context.getContentResolver().delete(
                contentUri,
                null,
                null
        );
    }

    public static String queryNote(Context context, Integer id) {
        assert (id > 0);

        Uri contentUri = ContentUris.withAppendedId(BASE_URI, id);
        String[] projection = {DNModel.Notes.ID, DNModel.Notes.NOTE};

        Cursor cursor = context.getContentResolver().query(
                contentUri,
                projection,
                null,
                null,
                null
        );

        String note;

        if (cursor.getCount() > 0) {
            cursor.moveToFirst();
            note = cursor.getString(1);
        } else {
            note = null;
        }

        return note;
    }


    public static void spawnInsertNoteActivity(Context context, Integer id) {
        Intent intent = new Intent(context, InsertNoteActivity.class);
        intent.putExtra(MESSAGE_NOTE_ID, id);
        context.startActivity(intent);
    }

    public static void spawnDeleteNoteDialog(Context context, Integer id) {
        deleteNote(context, id);
    }

}

Java Source Code List

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