接手以前同事留下的代码,今天突然出现了一个bug: java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare() 而出错的代码就是一个Toast.makeText()方法. 这个方法很常见,但是报错的不多,前两天有过类似的经验,所以很快找到原因:Android中不允许其他线程更新主线程的视图. 修改很简单,创建一个handler,用来处理消息,然后把原来的处理…

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(),"操作失败:"+r.Message,Toast.LENGTH_LONG).show(); Looper.loop();…

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…

开启resin 服务器以后提示如下:(控制台不断的循环循环打印如下错误提示) java.lang.RuntimeException: java.net.SocketException: Unrecognized Windows Sockets error: 0: JVM_Bind at com.caucho.server.cluster.Server.start(Server.java:1191) at com.caucho.server.cluster.Cluster.startServer(…

今天跑MapReduce项目的时候遇到了这个问题,日志如下所示: // :: DEBUG ipc.ProtobufRpcEngine: Call: getDiagnostics took 19ms Error: java.lang.RuntimeException: java.lang.NoSuchMethodException: com.hadoop.train.Anagram$AnagramReducer.<init>() at org.apache.hadoop.util.Reflect…

14/02/28 20:29:48 INFO mapred.JobClient: Task Id : attempt_201402281833_0004_m_000000_1, Status : FAILED java.lang.RuntimeException: java.lang.ClassNotFoundException: cmd.CmdWordCount$MyMapper at org.apache.hadoop.conf.Configuration.getClass(Configur…

异常:java.lang.RuntimeException: Unable to start activity ComponentInfo{com.william/com.william.ResultActivity}: android.content.res.Resources$NotFoundException: String resource ID #0x14 解决:TextView 对象中有一个方法为setText(param) ,当你传入一个int类型的值时,代码是不会报错的,但是当你…

严重: Dispatcher initialization failed java.lang.RuntimeException: java.lang.reflect.InvocationTargetException处理方法: 1.核对lib包    commons-fileupload-1.2.1.jar, commons-io-1.3.2.jar commons-logging-1.0.4.jar freemarker-2.3.16.jar ognl-3.0.jar struts2-core…

今天学习Android开发突然遇到了这个问题,查阅了很多资料,并且对集中原因进行了分析. 错误信息字符串:java.lang.RuntimeException: Unable to start activity ComponentInfo{com.first/com.first.Game}: java.lang.NullPointerException 一般都会在Activity  onCreate()方法里的setContentView(XXX)发生此错误,网上查阅了很多原因,大概有四种重要可…

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'daoSupport': Injection of resource dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name…