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Can't create handler inside thread that has not called Looper.prepare() 异常问题

Posted on 2011-07-30 10:04 oathleo 阅读(4251) 评论(1)  编辑  收藏 所属分类: Android
遇到的情况
AsyncTask
protected GAViewer doInBackground(Activity... params) {
    ......
    GAViewer viewer = new GAViewer(result, drawActivity.getApplicationContext());
    return viewer;
}

产生
Can't create handler inside thread that has not called Looper.prepare()
异常

原因估计
1.viewer 是个 SurfaceView ，而doInBackground是不允许操作UI的
2.drawActivity.getApplicationContext() 已经操作了UI ？maybe

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2011-11-28 20:06 by mark
android webkit plugin

线程里回调javascript函数时，插件直接崩溃，并提示：

WARN/System.err(296): java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
原因是，另外一线程不能更新UI主线程。插件提供同步函数。用这个pluginthreadasynccall，再调用invokeDefault就可以了。


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