Android-java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
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的，如下代码：
|
1
2
3
4
5
6
7
8
9
10
11
|
@Overridepublic void run() { //前面代码省略 Looper.prepare(); Log.i("---my tag---", "下载完成："+downloadPath); Toast.makeText(context, fileName+"下载完成...", Toast.LENGTH_LONG).show(); Looper.loop(); } |
在使用Toast之前加一行Looper.prepare();，然后在Toast之后加一行Looper.loop();，即可实现。看了很多文章也没理解，所以这里就不误导大家了，感兴趣的自己搜搜原因。
上面代码是我自己写的文件下载功能一部分代码，完整代码可以查看：
Android-java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
Android-java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()的更多相关文章
- java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()解决办法
代码改变世界 java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.pre ...
- java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
- android Toast提示异常：java.lang.RuntimeException: Can't create handler inside thread that has not called
Toast只能在UI线程弹出,解决此问题可以在Toast前后加两行代码,如下所示: Looper.prepare(); Toast.makeText(getApplicationContext(),& ...
- Android 线程更新UI报错 : Can't create handler inside thread that has not called Looper.prepare()
MainActivity中有一个按钮,绑定了save方法 public void save(View view) { String title = titleText.getText().toStri ...
- Android handler 报错处理Can't create handler inside thread that has not called Looper.prepare()
问题: 写了一个sdk给其他人用,提供一个回调函数,函数使用了handler处理消息 // handler监听网络请求,完成后操作回调函数 final Handler trigerGfHandler ...
- Android Exception 13(Can't create handler inside thread that has not called Looper.prepare())
10-12 17:02:55.500: E/AndroidRuntime(28343): FATAL EXCEPTION: Timer-2 10-12 17:02:55.500: E/AndroidR ...
- 在子线程中new Handler报错--Can't create handler inside thread that has not called Looper.prepare()
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 ...
- 【转】在子线程中new Handler报错--Can't create handler inside thread that has not called Looper.prepare()
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 ...
- 转 在子线程中new Handler报错--Can't create handler inside thread that has not called Looper.prepare()
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 ...
随机推荐
- svn has stoped working
各种问各种搜 ,看来还得靠自己,,,,下面是解决方案; 如果你出现这种情况, 右键点击svn的选项,就弹出这个框框,,,,点击svn里的哪个选项都是弹出这个框框,,,,重新安装,重启,换各种版本安 ...
- HTML——<meta http-equiv="content-type" content="text/html; charset=UTF-8">
没有添加这句话的编码方式的话,很容易就乱码了 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"&g ...
- System.Web.Mvc.Html 命名空间小计(转)
最近在看MVC框架,发现这个博文对初学者可能有帮助,故转之. 1,Html.Action 使用指定参数调用指定子操作方法并以 HTML 字符串形式返回结果. Html.Action() < ...
- ### 线性回归(Regression)
linear regression logistic regression softmax regression #@author: gr #@date: 2014-01-21 #@email: fo ...
- ###《Effective STL》--Chapter2
点击查看Evernote原文. #@author: gr #@date: 2014-09-15 #@email: forgerui@gmail.com Chapter2 vector和string T ...
- 第21条：理解Objective-C错误模型
首先要注意的是: “自动引用计数”(Automatic Reference Counting, ARC,参见第30条)在默认情况下不是“异常安全的”(exception safe).具体来说,这意味着 ...
- Container容器控件的使用、Hbox与Vbox布局管理器的使用、以及AjaxAction前后台事件响应
1.由于有前后台交互功能,需要在Spring上下文中注册一个用于提供服务的bean,对于这个bean使用Spring提供的@Component标注,如果需要使用@Component注解,需要在项目中W ...
- CUDA_矢量相加
#include<iostream> #define N 10 _ _global_ _ void add(*a,*b,*c) { int tid=blockIdx.x; if(tid&l ...
- （poj）1502 MPI Maelstrom
题目链接:http://poj.org/problem?id=1502 Description BIT has recently taken delivery of their processor A ...
- asp.net mvc上传头像加剪裁功能介绍
正好项目用到上传+剪裁功能,发上来便于以后使用. 我不能告诉你们其实是从博客园扒的前台代码,哈哈. 前端是jquery+fineuploader+jquery.Jcrop 后台是asp.net mvc ...