问题:android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original

问题:Android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a
我的场景是

LinearLayout.LayoutParams params11 
= new LinearLayout.LayoutParams(264, LinearLayout.LayoutParams.WRAP_CONTENT);
bt21.setLayoutParams(params11);

更新设置UI
问题的意思是更新UI阻塞了主线程
解决方法: 利用runOnUiThread，下面是我一个例子,关于runOnUiThread的用法，自行查询

  runOnUiThread(new Runnable() {
     @Override
     public void run() {
        //更改UI；
         new Handler().postDelayed(new Runnable() {
          @Override
            public void run() {
            //TODO  todo somthing here
            System.out.println("宽度" + bt1.getWidth());
            LinearLayout.LayoutParams params1 
           = new LinearLayout.LayoutParams(bt1.getWidth(),                                 
           LinearLayout.LayoutParams.WRAP_CONTENT);
           bt2.setLayoutParams(params1);
                               }
},1 * 1000);  //延迟10秒执行
            }
        });