java当按钮调用onClick时活动停止

Question

所以我有一个重置按钮，它调用onclick resetbutton。点击这里是代码

public void ResetButtonClicked(View view){
   SharedPreferences sharedPref= getSharedPreferences("userInfo", Context.MODE_PRIVATE);
    SharedPreferences.Editor editor=sharedPref.edit();
    editor.putString("phone1",sa.toString());
    editor.putString("phone2",re.toString());
    mActivity.stud();
    Toast.makeText(this, "All Emergency Numbers have been Reset.", Toast.LENGTH_SHORT).show();

}

顺便说一句：mActivity。stud是主活动的一个函数。它以前在下面给出的创建代码中声明过

 MainActivity mActivity= new MainActivity();