不能创建处理器 Can't create handler inside thread that has not called Looper.prepare()

最新推荐文章于 2023-04-07 10:47:42 发布

原创最新推荐文章于 2023-04-07 10:47:42 发布 · 174 阅读

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#Android #logcat #handler #thread #DebugLog

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本文详细解析了Android应用在特定线程中创建Handler时遇到的崩溃问题，提供了具体的错误信息及解决方案，帮助开发者理解Looper.prepare()的作用。

Android 2.3.3       
Eclipse Version: 3.7.0       
LogCat

LogCat 报错信息：

02-06 15:07:52.794: WARN/dalvikvm(503): threadid=18: thread exiting with uncaught exception (group=0x40015560)
02-06 15:07:52.815: ERROR/AndroidRuntime(503): FATAL EXCEPTION: Thread-49
02-06 15:07:52.815: ERROR/AndroidRuntime(503): java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
02-06 15:07:52.815: ERROR/AndroidRuntime(503): at android.os.Handler.(Handler.java:121)
02-06 15:07:52.815: ERROR/AndroidRuntime(503): at android.app.Activity.(Activity.java:680)
02-06 15:07:52.815: ERROR/AndroidRuntime(503): at android.app.ListActivity.(ListActivity.java:175)
02-06 15:07:52.815: ERROR/AndroidRuntime(503): at android.preference.PreferenceActivity.(PreferenceActivity.java:76)
02-06 15:07:52.815: ERROR/AndroidRuntime(503): at com.tmall.iphone4s.manage.Preference.(Preference.java:62)
02-06 15:07:52.815: ERROR/AndroidRuntime(503): at com.tmall.iphone4s.Check.run(Check.java:297)
02-06 15:07:52.815: ERROR/AndroidRuntime(503): at java.lang.Thread.run(Thread.java:1019)
02-06 15:07:52.864: WARN/ActivityManager(61): Force finishing activity com.tmall.iphone4s/.PlayAd

发生错误原因：线程内未调用Looper.prepare()，不能创建处理器。
解决办法：在线程Check的run()中加入 Looper.prepare();

public void run() {
	// TODO Auto-generated method stub
	super.run();
	Looper.prepare();
	setting = new Preference(context);
	check();
	}