Android App is not responding on click in android studio?

Question

I am beginner in android studio and When i click on button to transfer my activity from one to another then i am getting error:App is not responding? What's wrong with my code?

Here is first activity which is initial destination

Here is my Second Activity which is final destination

Answer 1

您的按钮b变量实例化不好，您应该声明如下：

b = (Button) findViewById(R.id.simpleProgramDisplayDate);