Android 动态创建SQLite表？

我有一个流媒体视频应用程序。在我的应用程序中，我有DB和一个表“保存的播放列表”。当用户单击“保存播放列表”按钮时，它会将播放列表保存到该表中。 我现在需要创建新表，用户点击视频“保存视频”并选择要保存的播放列表，如果没有播放列表，他需要创建一个。所以是这样的：

TABLE SAVED PLAYLISTS

TABLE_ID | TABLE_NAME | TABLE_DATA
         |            |


TABLE SAVED VIDEOS

VIDEO_ID | VIDEO_NAME | VIDEO_DATA | PLAYLIST_ID 
         |            |

我保存的播放列表表有以下代码：

    private static final String SELECT_PLAYLISTS_SQL_QUESTION = "SELECT * FROM " + DatabaseDefinition.TABLE_SAVED_PLAYLISTS;

在主要活动中：

 private View.OnClickListener btnSavePlaylistListener = new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if (gridCustomAdapter.getPlaylistId() == -1) {
                String playlistDataTemp = new Gson().toJson(gridCustomAdapter.getCurrentPlaylist());
                dbHandler.insertNewPlaylist(currentSearchContent, playlistDataTemp);
                onSwipeRight();
            }
        }
    };

---

您真的不应该在SQLiteOpenHelper的

onCreate

之外创建新表

动态创建SQLite表吗？

为什么？提前创建所有需要的表。然后在需要时填写。相同类型的所有元素都应放入同一个表中。如果需要区分它们，请添加另一列。

 public List<DatabasePlaylistObject> getPlaylists() {
        List<DatabasePlaylistObject> resultList = new ArrayList<DatabasePlaylistObject>();
        try {
            openReadableInstance();
            Cursor cursorNew = databaseInstance.rawQuery(SELECT_PLAYLISTS_SQL_QUESTION, null);
            if (cursorNew.moveToFirst()) {
                do {
                    DatabasePlaylistObject tempPlaylistObject = new DatabasePlaylistObject();
                    tempPlaylistObject.setId(cursorNew.getInt(0));
                    tempPlaylistObject.setPlaylistName(cursorNew.getString(1));
                    tempPlaylistObject.setPlaylistData(cursorNew.getString(2));
                    resultList.add(tempPlaylistObject);
                }
                while (cursorNew.moveToNext());
            }
            closeDatabaseInstance();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return resultList;
    }

 public void removePlaylist(int playlistId) {
        try {
            openWritableInstance();
            databaseInstance.delete(DatabaseDefinition.TABLE_SAVED_PLAYLISTS, DatabaseDefinition.COLUMN_ID_PLAYLIST + "=" + playlistId, null);
            closeDatabaseInstance();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

 private View.OnClickListener btnSavePlaylistListener = new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if (gridCustomAdapter.getPlaylistId() == -1) {
                String playlistDataTemp = new Gson().toJson(gridCustomAdapter.getCurrentPlaylist());
                dbHandler.insertNewPlaylist(currentSearchContent, playlistDataTemp);
                onSwipeRight();
            }
        }
    };