How does the activity under Android Tabhost get the value coming in?

How does the activity under Android Tabhost get the value coming in, the specific solution is as follows:

Solution:

Other activity Settings Intent:intent intent=new Intent ();
   Intent.putextra ("key", value), value of//intent key value
           Intent.setclass (Fromactivity.this,tabhostactivity.class);
                    FromActivity.this.startActivity (Intent);
Tabhostacticity get the value and pass the value:
                   Intent intent=getintent ();
   String Value=intent.getstringextra ("key");
Intent.putextra ("Another key", another value);
   Intent.setclass (Tabhostactivity.this, Dest.class);
   Ts1.setcontent (Intent);
                                Mtabhost.addtab (TS1);
Target activity value: .... (no need to say)

How does the activity under Android Tabhost get the value coming in?