Android Intent Jump

One, does not need to return the value the jump

Intent intent=new Intent ();

Intent.setclass (current acitivy.this, Target activity.class);

StartActivity (Intent);

Second, a jump that needs a return value

Intent intent=new Intent ();

Intent.setclass (current acitivy.this, Target activity.class);

StartActivity (Intent);

Startactivityforresult (Intent, status value (int type));

The status value is used as a validation of the accepted target return value.

Requestcode receive the returned status value

RESULTCODE:RESULT_OK Result_canceled can assign its own value, press the return key, the system default assignment is: result_canceled

Target activity closed to return request activity

For example:

1. Request page

public class Mainactivy extends Activity {

@Override
public void OnCreate (Bundle savedinstancestate) {
Super.oncreate (savedinstancestate);
Setcontentview (R.layout.main);
Intent intent=new Intent ();
Intent.setclass (Mainactivy.this, Receivemsg.class);
Startactivityforresult (Intent, 0);
}

protected void Onactivityresult (int requestcode, int resultcode, Intent data) {
TODO auto-generated Method Stub
Super.onactivityresult (Requestcode, ResultCode, data);
if (requestcode==0) {
if (RESULTCODE==RESULT_OK) {
Toast.maketext (This, "Send SMS result_ok", Toast.length_short). Show ();
}else if (resultcode==result_canceled) {
Toast.maketext (This, "result Cancel", Toast.length_short). Show ();
}else {
Toast.maketext (This, ResultCode, Toast.length_short). Show ();
}
}else {
Toast.maketext (This, "Requsetcode not 0", Toast.length_short). Show ();
}

}
}

2. Receive the return value interface

public class Receivemsg extends activity{

    protected void OnCreate (Bundle savedinstancestate) {
         //TODO auto-generated Method stub
         Super.oncreate (savedinstancestate);         
         receivemsg.this.setresult (RESULT_OK);
        this.finish ();       
    }
}