在Android中,ContentResolver并不直接支持事务处理
以下是一个简单的示例:
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()
}
请注意,这只是一个简单的示例,实际应用中可能需要根据需求进行更复杂的错误处理和事务管理。