如何使用Context重新启动调用了其他类的活动？

Question

When i am in an Activity say Activity_A, i go to a class_B using the context of Activity_A.

Now when i want to restart the Activity_A from the class_B. I use this

Intent intent = new Intent(context, Activity_A.class);
context.startActivity(intent);

what i want is when i am calling the class_B from various Activities, it must restart the Activity it is called from, using the context which is sent to the class_B from the Activity.

i want to replace Activity_A.class with the Activity which called class_B

Answer 1

In your case you shoud pass a class variable togethe with Context of activity. eg from Actitity_A:

class_B.doMethod(this,Activity_A.class);

And use class variable for start Activity from class_B

Answer 2

关于使用startActivityForResult（intent，code）而不是仅仅使用startActivity（intent）呢？

Answer 3

You can pass a string containing name of the Activity. like below

Intent intent = new Intent(context, Activity_A.class);
intent.putExtra("CALLED_FROM","ACTIVITY_A"); //PASSING FLAG Variable to know from where it called
context.startActivity(intent);

'

in onCreate of Activity_B you can use below code.

String calledFrom = getIntent().getStringExtra("CALLED_FROM");

and from ClassB, you can basically check Activity Names in calledFrom String and start Activity Accordingly.