在Android中,ContentResolver并不直接支持事務(wù)處理
以下是一個(gè)簡(jiǎn)單的示例:
public class MyContentProvider extends ContentProvider {
private SQLiteDatabase mDb;
@Override
public boolean onCreate() {
// Initialize the SQLiteDatabase object here
return true;
}
@Override
public Uri insert(Uri uri, ContentValues values) {
// Begin a transaction
mDb.beginTransaction();
try {
// Perform database operations
long rowId = mDb.insert(TABLE_NAME, null, values);
if (rowId > 0) {
// If the operation is successful, commit the transaction
mDb.setTransactionSuccessful();
return ContentUris.withAppendedId(uri, rowId);
} else {
throw new SQLException("Failed to insert row into " + uri);
}
} catch (Exception e) {
// If an exception occurs, roll back the transaction
mDb.endTransaction();
throw e;
} finally {
// Close the database connection
mDb.endTransaction();
}
}
// Implement other ContentProvider methods, such as query(), update(), and delete()
}
請(qǐng)注意,這只是一個(gè)簡(jiǎn)單的示例,實(shí)際應(yīng)用中可能需要根據(jù)需求進(jìn)行更復(fù)雜的錯(cuò)誤處理和事務(wù)管理。