-
-
Save valokafor/4fba5f75ec5539e13f65 to your computer and use it in GitHub Desktop.
Android Notepad App Tutorial - this is the way the Content Provider should look like at the start
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| package com.okason.simplenoteapp.data; | |
| import android.content.ContentProvider; | |
| import android.content.ContentValues; | |
| import android.content.UriMatcher; | |
| import android.database.Cursor; | |
| import android.database.sqlite.SQLiteDatabase; | |
| import android.database.sqlite.SQLiteQueryBuilder; | |
| import android.net.Uri; | |
| import android.text.TextUtils; | |
| import com.okason.simplenoteapp.utility.Constants; | |
| import java.util.Arrays; | |
| import java.util.HashSet; | |
| /** | |
| * Created by Valentine on 9/18/2015. | |
| */ | |
| public class NoteContentProvider extends ContentProvider{ | |
| private static final int NOTE = 100; | |
| private static final int NOTES = 101; | |
| private static final String BASE_PATH_NOTE = "notes"; | |
| private static final String AUTHORITY = "com.okason.prontonotes.data.provider"; | |
| public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/" + BASE_PATH_NOTE); | |
| private DatabaseHelper dbHelper; | |
| private static final UriMatcher URI_MATCHER = new UriMatcher(UriMatcher.NO_MATCH); | |
| static { | |
| URI_MATCHER.addURI(AUTHORITY, BASE_PATH_NOTE, NOTES); | |
| URI_MATCHER.addURI(AUTHORITY, BASE_PATH_NOTE + "/#", NOTE); | |
| } | |
| private void checkColumns(String[] projection) { | |
| if (projection != null) { | |
| HashSet<String> request = new HashSet<String>(Arrays.asList(projection)); | |
| HashSet<String> available = new HashSet<String>(Arrays.asList(Constants.COLUMNS)); | |
| if (!available.containsAll(request)) { | |
| throw new IllegalArgumentException("Unknown columns in projection"); | |
| } | |
| } | |
| } | |
| @Override | |
| public boolean onCreate() { | |
| dbHelper = new DatabaseHelper(getContext()); | |
| return false; | |
| } | |
| @Override | |
| public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder) { | |
| SQLiteQueryBuilder queryBuilder = new SQLiteQueryBuilder(); | |
| checkColumns(projection); | |
| int type = URI_MATCHER.match(uri); | |
| switch (type){ | |
| case NOTE: | |
| //there not to do if the query is for the table | |
| break; | |
| case NOTES: | |
| queryBuilder.appendWhere(Constants.COLUMN_ID + " = " + uri.getLastPathSegment()); | |
| break; | |
| default: | |
| throw new IllegalArgumentException("Unknown URI: " + uri); | |
| } | |
| SQLiteDatabase db = dbHelper.getWritableDatabase(); | |
| Cursor cursor = queryBuilder.query(db, projection, selection, selectionArgs, null, null, sortOrder); | |
| cursor.setNotificationUri(getContext().getContentResolver(), uri); | |
| return cursor; | |
| } | |
| @Override | |
| public String getType(Uri uri) { | |
| return null; | |
| } | |
| @Override | |
| public Uri insert(Uri uri, ContentValues values) { | |
| int type = URI_MATCHER.match(uri); | |
| SQLiteDatabase db = dbHelper.getWritableDatabase(); | |
| Long id; | |
| switch (type){ | |
| case NOTES: | |
| id = db.insert(Constants.NOTES_TABLE, null, values); | |
| break; | |
| default: | |
| throw new IllegalArgumentException("Unknown URI: " + uri); | |
| } | |
| getContext().getContentResolver().notifyChange(uri, null); | |
| return Uri.parse(BASE_PATH_NOTE + "/" + id); | |
| } | |
| @Override | |
| public int delete(Uri uri, String selection, String[] selectionArgs) { | |
| int type = URI_MATCHER.match(uri); | |
| SQLiteDatabase db = dbHelper.getWritableDatabase(); | |
| int affectedRows; | |
| switch (type) { | |
| case NOTES: | |
| affectedRows = db.delete(Constants.NOTES_TABLE, selection, selectionArgs); | |
| break; | |
| case NOTE: | |
| String id = uri.getLastPathSegment(); | |
| if (TextUtils.isEmpty(selection)) { | |
| affectedRows = db.delete(Constants.NOTES_TABLE, Constants.COLUMN_ID + "=" + id, null); | |
| } else { | |
| affectedRows = db.delete(Constants.NOTES_TABLE, Constants.COLUMN_ID + "=" + id + " and " + selection, selectionArgs); | |
| } | |
| break; | |
| default: | |
| throw new IllegalArgumentException("Unknown URI: " + uri); | |
| } | |
| getContext().getContentResolver().notifyChange(uri, null); | |
| return affectedRows; | |
| } | |
| @Override | |
| public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) { | |
| int type = URI_MATCHER.match(uri); | |
| SQLiteDatabase db = dbHelper.getWritableDatabase(); | |
| int affectedRows; | |
| switch (type) { | |
| case NOTES: | |
| affectedRows = db.update(Constants.NOTES_TABLE, values, selection, selectionArgs); | |
| break; | |
| case NOTE: | |
| String id = uri.getLastPathSegment(); | |
| if (TextUtils.isEmpty(selection)) { | |
| affectedRows = db.update(Constants.NOTES_TABLE, values, Constants.COLUMN_ID + "=" + id, null); | |
| } else { | |
| affectedRows = db.update(Constants.NOTES_TABLE, values, Constants.COLUMN_ID + "=" + id + " and " + selection, selectionArgs); | |
| } | |
| break; | |
| default: | |
| throw new IllegalArgumentException("Unknown URI: " + uri); | |
| } | |
| getContext().getContentResolver().notifyChange(uri, null); | |
| return affectedRows; | |
| } | |
| } |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment