AS-cannot resolve constructor intent

喵呜，好烦，又cannont resolve，在这种情况下遇到的

 Intent intent = new Intent(this,emergencyIntent.class);、、

解决：

 Intent intent = new Intent(MainActivity.this,emergencyIntent.class);

原因：

The error is because you are writing it in public void onClick(View v), where 'this' will mean instance of anonymous class that implements View.OnClickListener. while first parameter in Intent constructor Intent(Context context, Class<?> cls) requires Activity context.