そのため、Android 4.0 + でコードをテストし、他のバージョンでも問題なく動作すると考えるという大きな間違いを犯しました。しかし、SQLiteOpenHelper で 2.X と 3.X の問題に直面しています。
最初のコード:
public class HelperDB extends SQLiteOpenHelper implements BaseColumns {
public static final int DATABASE_VERSION = 2;
public static final String DATABASE_NAME = "MYDB.db";
public static final String TABLE_NAME = "MYtable";
public static final String TABLE_NAME_LOGO = "MYLogos";
public static final String COLUMN_NAME_1 = "xxxxx";
public static final String COLUMN_NAME_2 = "yyyy";
public static final String COLUMN_NAME_3 = "zzzz";
public static final String COLUMN_NAME_4 = "aaaa";
public static final String COLUMN_NAME_LOGO = "logo";
public static final String COLUMN_NAME_5 = "3333";
public static final String COLUMN_NAME_6 = "fffff";
public static final String COLUMN_NAME_7= "Abc";
public HelperDB(Context context)
{
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db){
db.execSQL("CREATE TABLE " + TABLE_NAME + "(" + _ID + " INTEGER PRIMARY KEY autoincrement," + COLUMN_NAME_1 + " TEXT not null," + COLUMN_NAME_2
+ " TEXT not null," + COLUMN_NAME_3 + " TEXT not null," + COLUMN_NAME_4 + " LONG not null," + COLUMN_NAME_5 + " INT DEFAULT 99," + COLUMN_NAME_6 +" INT DEFAULT 99);");
db.execSQL("CREATE TABLE " + TABLE_NAME_LOGO + "(" + _ID + " INTEGER PRIMARY KEY autoincrement," + COLUMN_NAME_6 + " TEXT not null," + COLUMN_NAME_7 + " INTERGET not null);");
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
}
}
******************************************************************************
public class MatchesDB {
private HelperDB dbHelper;
private SQLiteDatabase dbw, dbr;
public static int id;
public MatchesDB(Context context){
dbHelper = new HelperDB(context);
dbw = dbHelper.getWritableDatabase();
dbr = dbHelper.getReadableDatabase();
}
public void fillinfotable(){}
And all other functions to query the database and delete etc
を呼び出して DB を作成する
MatchesDB newdb = new MatchesDB(context);
newdb.fillinfotable();
これはすべて、すべての 4.0 以降のデバイスで完全に機能しています。ただし、2.x デバイスで実行しようとすると、次のエラーが発生します。
07-14 21:29:14.890: E/Database(22231): CREATE TABLE android_metadata failed
07-14 21:29:14.898: E/Database(22231): CREATE TABLE android_metadata failed
07-14 21:29:15.640: E/Database(22231): Failed to setLocale() when constructing, closing the database
07-14 21:29:15.640: E/Database(22231): android.database.sqlite.SQLiteException: database is locked
07-14 21:29:15.640: E/Database(22231): at android.database.sqlite.SQLiteDatabase.native_setLocale(Native Method)
07-14 21:29:15.640: E/Database(22231): at android.database.sqlite.SQLiteDatabase.setLocale(SQLiteDatabase.java:2000)
07-14 21:29:15.640: E/Database(22231): at android.database.sqlite.SQLiteDatabase. <init>(SQLiteDatabase.java:1857)
07-14 21:29:15.640: E/Database(22231): at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:822)
07-14 21:29:15.640: E/Database(22231): at android.database.sqlite.SQLiteDatabase.openOrCreateDatabase(SQLiteDatabase.java:856)
07-14 21:29:15.640: E/Database(22231): at android.database.sqlite.SQLiteDatabase.openOrCreateDatabase(SQLiteDatabase.java:849)
07-14 21:29:15.640: E/Database(22231): at android.app.ContextImpl.openOrCreateDatabase(ContextImpl.java:556)
07-14 21:29:15.640: E/Database(22231): at android.content.ContextWrapper.openOrCreateDatabase(ContextWrapper.java:203)
07-14 21:29:15.640: E/Database(22231): at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:118)
どんな助けでも大歓迎です!! アプリはすでにプレイストアにあり、アップデートを公開する必要があるため、本当に迅速な修正が必要です