当应用未运行时，使用FirebaseMessagingService在SQLlite中保存数据

Question

**当应用程序未运行时会出现此问题，请回答

我的问题很简单。

我正在使用Firebase推送通知来获取通知。当我的应用程序运行时，我的整个代码正在运行，正确的值正在保存到数据库。当应用程序未运行且发出通知且FirebaseMessagingService中没有数据保存到数据库时，会出现问题。

我的FirebaseMessagingService代码是

  public class MyFirebaseMessagingService extends FirebaseMessagingService {
    private static int NOTIFY_ME_ID = 0;

    @Override
    public void onMessageReceived(RemoteMessage remoteMessage) {

        Message message= new Message(remoteMessage.getNotification().getTitle(),remoteMessage.getNotification().getBody(),remoteMessage.getData().get(Constants.Keys.IMPORTANT));

        DatabaseHandler databaseHandler= new DatabaseHandler(getApplicationContext());
        databaseHandler.addMessage(message);
}
}

数据库代码在

之下

public class DatabaseHandler extends SQLiteOpenHelper {
    // All Static variables
    // Database Version
    private static final int DATABASE_VERSION = 1;

    // Database Name
    private static final String DATABASE_NAME = "notifierxdatabase";

    // Contacts table name
    private static final String TABLE_MESSAGE = "message";

    // Contacts Table Columns names
    private static final String KEY_ID = "id";
    private static final String KEY_TITLE = "title";
    private static final String KEY_BODY = "body";
    private static final String KEY_TYPE = "type";

    public DatabaseHandler(Context context) {
        super(context, DATABASE_NAME, null, DATABASE_VERSION);
    }

    // Creating Tables
    @Override
    public void onCreate(SQLiteDatabase db) {
        String CREATE_CONTACTS_TABLE = "CREATE TABLE " + TABLE_MESSAGE + "("
                + KEY_ID + " INTEGER PRIMARY KEY," + KEY_TITLE + " TEXT,"
                + KEY_BODY + " TEXT," + KEY_TYPE +" TEXT"+ ")";
        db.execSQL(CREATE_CONTACTS_TABLE);
    }

    // Upgrading database
    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        // Drop older table if existed
        db.execSQL("DROP TABLE IF EXISTS " + TABLE_MESSAGE);

        // Create tables again
        onCreate(db);
    }

    /**
     * All CRUD(Create, Read, Update, Delete) Operations
     */

    // Adding new contact
    public void addMessage(Message message) {
        SQLiteDatabase db = this.getWritableDatabase();

        ContentValues values = new ContentValues();
        values.put(KEY_TITLE,message.getTitle());
        values.put(KEY_BODY,message.getBody());
        values.put(KEY_TYPE,message.getType());
        // Inserting Row
        db.insert(TABLE_MESSAGE, null, values);
        db.close(); // Closing database connection
    }

    // Getting single contact
    public Message getMessage(int id) {
        SQLiteDatabase db = this.getReadableDatabase();

        Cursor cursor = db.query(TABLE_MESSAGE, new String[] { KEY_ID,
                        KEY_TITLE, KEY_BODY,KEY_TYPE }, KEY_ID + "=?",
                new String[] { String.valueOf(id) }, null, null, null, null);
        if (cursor != null)
            cursor.moveToFirst();

        Message message = new Message(Integer.parseInt(cursor.getString(0)),
                cursor.getString(1), cursor.getString(2),cursor.getString(3));
        // return contact
        return message;
    }

    // Getting All Contacts
    public List<Message> getAllMessages() {
        List<Message> messageList = new ArrayList<Message>();
        // Select All Query
        String selectQuery = "SELECT  * FROM " + TABLE_MESSAGE;

        SQLiteDatabase db = this.getWritableDatabase();
        Cursor cursor = db.rawQuery(selectQuery, null);

        // looping through all rows and adding to list
        if (cursor.moveToFirst()) {
            do {

                Message message= new Message();
                message.setId(Integer.parseInt(cursor.getString(0)));
                message.setTitle(cursor.getString(1));
                message.setBody(cursor.getString(2));
                message.setType(cursor.getString(3));
                messageList.add(message);
            } while (cursor.moveToNext());
        }

        // return contact list
        return messageList;
    }

    // Updating single contact
    public int updateMessage(Message message) {
        SQLiteDatabase db = this.getWritableDatabase();

        ContentValues values = new ContentValues();
        values.put(KEY_TYPE, message.getTitle());
        values.put(KEY_BODY, message.getBody());
        values.put(KEY_TYPE, message.getType());

        // updating row
        return db.update(TABLE_MESSAGE, values, KEY_ID + " = ?",
                new String[] { String.valueOf(message.getId()) });
    }

    // Deleting single contact
    public void deleteMessage(Message message) {
        SQLiteDatabase db = this.getWritableDatabase();
        db.delete(TABLE_MESSAGE, KEY_ID + " = ?",
                new String[] { String.valueOf(message.getId()) });
        db.close();
    }


    // Getting contacts Count
    public int getMessagesCount() {
        String countQuery = "SELECT  * FROM " + TABLE_MESSAGE;
        SQLiteDatabase db = this.getReadableDatabase();
        Cursor cursor = db.rawQuery(countQuery, null);
        cursor.close();

        // return count
        return cursor.getCount();
    }

}