这可能是由于Room数据库中的一些错误引起的,为了确定问题的根本原因,可以尝试在代码中添加一些调试语句来记录应用程序的日志。例如,在您的数据访问对象(Dao)中,您可以添加以下代码:
@Dao public interface MyDao {
@Query("SELECT * FROM my_table")
List
@Insert void insertAll(MyEntity... myEntities);
@Delete void delete(MyEntity myEntity);
@Query("SELECT COUNT(*) FROM my_table") int count();
@Query("DELETE FROM my_table") void deleteAll(); }
添加以下代码,以在日志中记录您的应用程序状态:
@Dao public interface MyDao {
@Query("SELECT * FROM my_table")
List
@Insert void insertAll(MyEntity... myEntities);
@Delete void delete(MyEntity myEntity);
@Query("SELECT COUNT(*) FROM my_table") int count();
@Query("DELETE FROM my_table") void deleteAll();
@Query("SELECT * FROM my_table WHERE id=:id") MyEntity getById(int id);
@Query("SELECT * FROM my_table WHERE name LIKE :name")
List
现在,在您的应用程序中,您可以添加以下调试代码,以记录错误消息:
public class MyApp extends Application {
private static final String TAG = "MyApp";
@Override public void onCreate() { super.onCreate();
// Initialize the logger
LogHelper.init();
// Add an exception handler to log any uncaught exceptions
Thread.setDefaultUncaughtExceptionHandler(new Thread.UncaughtExceptionHandler() {
@Override
public void uncaughtException(Thread thread, Throwable throwable) {
StringWriter sw = new StringWriter();
PrintWriter pw = new PrintWriter(sw);
throwable.printStackTrace(pw);
LogHelper.e(TAG, sw.toString());
System.exit(1);
}
});
} }
通过在日志中查看错误