效果贴图: sql查询语句: StringBuilder sql = new StringBuilder("select * from message model where model.message_id in (");sql.append(" ( select m1.message_id from message m1 where m1.status=0 and m1.messag
转载请注明来源:https://blog.csdn.net/devnn/article/details/135638486 前言 众所周知,Android App在子线程中是不允许更新UI的,否则会抛出异常: android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that creat
在子线程中new一个Handler为什么会报以下错误? java.lang.RuntimeException: Can’t create handler inside thread that has not called Looper.prepare() 这是因为Handler对象与其调用者在同一线程中,如果在Handler中设置了延时操作,则调用线程也会堵塞。每个Handler对象都会绑定