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对象都会绑定一个Looper对象,每个Looper对象对应一个消息队列(MessageQueue).如果在创建Ha…
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对象都会绑定一个Looper对象,每个Looper对象对应一个消息队列(MessageQueue).如果在创建Ha…
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对象都会绑定一个Looper对象,每个Looper对象对应一个消息队列(MessageQueue).如果在创建Ha…
Error:Can't create handler inside thread that has not called Looper.prepare() 原代码: //利用Handler消息传递机制 final Handler myHandler = new Handler(MainActivity.this.getMainLooper()){ @Override public void handleMessage(Message msg) { super.handleMessage(msg)…
Looper.prepare(); // Can't create handler inside thread that has not called Looper.prepare(). Toast.makeText(context,"登录超时",Toast.LENGTH_SHORT).show(); Looper.loop(); 这样子写就不会报错了: 但是他为什么报错???你是不是在子线程显示Toast了:来看一下Toast的源码: /** * Constructs an empt…
1)在Android 2.3以前,为防止ANR(Application Not Responding),Google是不赞成将网络连接等一系列耗时操作直接放到应用主线程进行的,推荐将这类操作放在子线程内:而Android 4.0版本开始,Google强制要求这类操作必须在子线程内进行,否则将抛出 NetworkOnMainThreadException 异常. (2)操作UI必须只能在主线程内进行,否则报“Can’t create handler inside thread that has n…
章出自:luchg技术交流 http://www.luchg.com 版权所有.本站文章除注明出处外,皆为作者原创文章,可自由引用,但请注明来源,谢谢. Android-java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare() 当我们在一个新的线程中使用android UI时,遇到这个异常 看了很多文章也还是不太清楚具体是什么原因,但是处理这个问题是很简单…
原子线程调用Toast报Can't create handler inside thread that has not called Looper.prepare() 错误 今天用子线程调Toast报了一个Can't create handler inside thread that has not calledLooper.prepare()错误. 因为toast的实现需要在activity的主线程才能正常工作,所以传统的非主线程不能使toast显示在actvity上,通过Handler可以使…
Can't create handler inside thread that has not called Looper.prepare() 将 Handler handler = new Handler() 更为 Handler handler = new Handler(Looper.getMainLooper()).方可解决 也可以在run 之前 调用 Looper.prepare(); 来解决此类问题 原因可点击: 参考文章…
代码改变世界 java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()解决办法 android Toast提示异常:java.lang.RuntimeException: Can't create handler inside thread that has not called 原因是在子线程弹Toast了, 切记,Toast只能在UI线程弹出 解决办法…
package com.example.kbr.utils; import android.view.Gravity; import android.widget.Toast; import io.reactivex.Observable; import io.reactivex.android.schedulers.AndroidSchedulers; /** * Created by keranbin on 2017/12/19. */ public class ToastUtil { pr…