Android-【报错】java.lang.ClassCastException: .MainActivity cannot be cast to java.lang.Runnable

像这种情况肯定是：

    //在子线程中进行耗时操作handler.post(new Runnable() {@Overridepublic void run() {// TODO Auto-generated method stub☆这里的this写成了MainActivity.this，所以报错了，他实际上需要的是Runnable这个内部类handler.postDelayed(this, 2000);  //延时2shandler.sendEmptyMessage(0);  //发送}}); }
}

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Android-【报错】java.lang.ClassCastException: .MainActivity cannot be cast to java.lang.Runnable

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