Java – sqlitedatabase ‘does not implement interface’

This error occurs when sqlitedatabase is used as closeable

I have a sample project to recreate it:

https://github.com/blundell/SQLDatabaseError

Use classes that extend sqliteopenhelper:

public class DatabaseHelper extends sqliteOpenHelper {

....

public void openAndCloseDatabase() {
    sqliteDatabase database = getWritableDatabase();

    close(database);
}

private void close(Closeable database) {
    try {
        if (database != null) {
            database.close();
        }
    } catch (Exception e) {
        Log.e("Error","Oh no!",e);
    }
}

}

Stack trace:

12-14 12:23:43.719: E/AndroidRuntime(5179): FATAL EXCEPTION: main
12-14 12:23:43.719: E/AndroidRuntime(5179): java.lang.IncompatibleClassChangeError: interface not implemented
12-14 12:23:43.719: E/AndroidRuntime(5179):   at com.blundell.sqldatabasecursorerror.DatabaseHelper.close(DatabaseHelper.java:35)
12-14 12:23:43.719: E/AndroidRuntime(5179):     at com.blundell.sqldatabasecursorerror.DatabaseHelper.openAndCloseDatabase(DatabaseHelper.java:29)
12-14 12:23:43.719: E/AndroidRuntime(5179):     at com.blundell.sqldatabasecursorerror.MainActivity.onCreate(MainActivity.java:13)
12-14 12:23:43.719: E/AndroidRuntime(5179):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
12-14 12:23:43.719: E/AndroidRuntime(5179):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1623)
12-14 12:23:43.719: E/AndroidRuntime(5179):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1675)
12-14 12:23:43.719: E/AndroidRuntime(5179):     at android.app.ActivityThread.access$1500(ActivityThread.java:121)
12-14 12:23:43.719: E/AndroidRuntime(5179):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:943)
12-14 12:23:43.719: E/AndroidRuntime(5179):     at android.os.Handler.dispatchMessage(Handler.java:99)
12-14 12:23:43.719: E/AndroidRuntime(5179):     at android.os.Looper.loop(Looper.java:130)
12-14 12:23:43.719: E/AndroidRuntime(5179):     at android.app.ActivityThread.main(ActivityThread.java:3701)
12-14 12:23:43.719: E/AndroidRuntime(5179):     at java.lang.reflect.Method.invokeNative(Native Method)
12-14 12:23:43.719: E/AndroidRuntime(5179):     at java.lang.reflect.Method.invoke(Method.java:507)
12-14 12:23:43.719: E/AndroidRuntime(5179):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866)
12-14 12:23:43.719: E/AndroidRuntime(5179):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:624)
12-14 12:23:43.719: E/AndroidRuntime(5179):     at dalvik.system.NativeStart.main(Native Method)

API：

http://developer.android.com/reference/android/database/sqlite/SQLiteDatabase.html

http://developer.android.com/reference/android/database/sqlite/SQLiteClosable.html

http://developer.android.com/reference/java/io/Closeable.html

Shouldn't this work?

public final class sqliteDatabase extends sqliteClosable
 >>
 public abstract class sqliteClosable extends Object implements Closeable
 >>
 public interface Closeable

Not working:

> Xperia Play Android 2.3. 4 > Motorola XOOM Android 4.0 four

Work:

>Samsung Galaxy nexus Android 4.2

Solution

OK, in the change notes for 4.1 (API level 16):

android. database. sqlite. Sqliteclosable implements Java only from API level 16 io. Closeable. Before that, they were irrelevant (even if the two interfaces existed from the beginning)

Therefore, if you want your code to be backward compatible, you should use sqliteclosable

It may also be worth installing the SDK for the minimum version you want to support and trying to build with it, and then the compiler will detect this