android-sqlite

问题 I am coding a Xamarin Android application, and am getting an error when trying to create a SQLite database. Here is my code: string applicationFolderPath = System.IO.Path.Combine(System.Environment.GetFolderPath(System.Environment.SpecialFolder.Personal), "CanFindLocation"); string databaseFileName = System.IO.Path.Combine(applicationFolderPath, "CanFindLocation.db"); SQLite.SQLite3.Config(SQLite.SQLite3.ConfigOption.Serialized); var db = new SQLiteConnection (databaseFileName); Here is the

问题 I have created an app when I install and launch it for first time it closes automatically but when I open it after it works fine. If I clear data of the app it also closes for first time. It shows android.database.sqlite.SQLiteCantOpenDatabaseException: unknown error (code 14): Could not open database Can anyone help here is my log 11-22 23:14:56.175 13193-13193/? I/art: Late-enabling -Xcheck:jni 11-22 23:14:56.195 13193-13193/? D/TidaProvider: TidaProvider() 11-22 23:14:56.285 13193-13193

问题 I have created an app when I install and launch it for first time it closes automatically but when I open it after it works fine. If I clear data of the app it also closes for first time. It shows android.database.sqlite.SQLiteCantOpenDatabaseException: unknown error (code 14): Could not open database Can anyone help here is my log 11-22 23:14:56.175 13193-13193/? I/art: Late-enabling -Xcheck:jni 11-22 23:14:56.195 13193-13193/? D/TidaProvider: TidaProvider() 11-22 23:14:56.285 13193-13193

问题 According the entity-relationship model, the relationship between tbl_post and tbl_category could be specified using Room Persistency Library as follows: @Entity(foreignKeys = @ForeignKey( entity = TblPost.class, parentColumns = "id", childColumns = "tbl_post_id") ) class TblPostCategory { @PrimaryKey public String id; @ColumnInfo(name = "user_id") public String postId; } However TblPostCategory depends on two foreign keys: post_id and category_id from TblPost and TbCategory . How the

问题 According the entity-relationship model, the relationship between tbl_post and tbl_category could be specified using Room Persistency Library as follows: @Entity(foreignKeys = @ForeignKey( entity = TblPost.class, parentColumns = "id", childColumns = "tbl_post_id") ) class TblPostCategory { @PrimaryKey public String id; @ColumnInfo(name = "user_id") public String postId; } However TblPostCategory depends on two foreign keys: post_id and category_id from TblPost and TbCategory . How the

问题 This code was working fine with one table....and was attaching file Now I want to create two tables first activity is inserting data in table1...but second activity is not inserting data....there is no log message........while calling attach it gives log as given below: E/SQLiteLog: (1) My database class is public class DatabaseHelper extends SQLiteOpenHelper { public static final String DATABASE_NAME="GEOTAG.db"; public static final String TABLE_NAME1="Coordinates_table"; public static final

问题 Hello I am working on an app and in which at one point I need to take input from user and store it in database and then fetch that data and put it on different TextView . Problem is I did stored the data in database and when i trying to fetch it My app shows a pop up i.e : App is not responding and logcat shows this: Package has already posted 50 toasts. Not showing more. I have used 6 database operations before this pullAccStt can this be a problem. DatabseAdapotor public long

问题 The application has a SearchView which fetches suggestions from a specific database table. Everything worked without any errors until Android 5.0 appeared. As of then, when the SQLiteQueryBuilder queries the database to fill the Cursor object, the return is empty cursor. Not NULL , but empty. On other platforms, I can output the Cursor 's content via DatabaseUtils.dumpCursorToString(cursorObject) , but on Android 5.0+ the method reports output on null objects Dumping cursor null <<<<< Even

问题 Can't seem to find a solution to this. I'm trying to edit the data in my List View item. The List View uses an array adapter to display the data in a row in the list view. The user holds their finger over the list view item they wish to edit which causes a box to pop up containing the option of either 'Delete' or 'Edit'. When the user clicks to Edit the data, the data from that list view item is supposed to be transferred over to the other activity where the user can edit it. Instead of

问题 i have database with all data saved inside it how can i change that and make get the data from strings,xml so when i change the locale all the data can be translated to locale language here is my code: public class DB_Sqlite extends SQLiteOpenHelper { public static final String BDname = "data.db"; public static final int DBVERSION = 1; /*<<<<< ADDED BUT NOT NEEDED */ public static final String TABLE_FAVOURITES = "mytable"; public static final String FAVOURITES_COL_ID = BaseColumns._ID; /*<<<<