how to call An Activity class from a noraml java class in Android [duplicate]

Question

I have one noraml java class say ReceivedChat.java in the constructor of this class i want to call an Activity of Android.

public class ReceivedChat {
    String message;
    String from;
    Context context;

    ReceivedChat(String message, String from) {
        this.message = message;
        this.from = from;

        Bundle b = new Bundle();
        b.putString("message", this.message);
        b.putString("from", this.from);
        b.putString("fromChat", "true");

        Intent i = new Intent(context.getApplicationContext(), XmppChatActivity.class);
        i.putExtras(b);
        context.getApplicationContext().startActivity(i);
    }
}

My Activity class is XmppChatActivity.

This program is not working. it is not calling the onCreate of my XmppChatActivity class Any help will be thankfull to me.

Answer 1

how to call An Activity class from a normal java class

you will need to pass Current Activity Context to ReceivedChat at the time of Object Creation from an Activity or any other Application Components as :

ReceivedChat(String message, String from,Context context)
{
this.message = message;
this.from = from;
this.context=context;  //<< initialize Context here 
Intent i = new Intent(context,XmppChatActivity.class);
 //....your code here
context.startActivity(i);

}

and instead of starting another Activity from class Constructor create an method in ReceivedChat and call it after object creation