Communication between Android activity

Package Com.example.myapp;import Android.app.activity;import Android.content.dialoginterface;import Android.content.intent;import Android.os.bundle;import Android.view.view;import Android.widget.Button;public class MyActivity extends Activity {    private Button Btnok = null;    /**     * Called when the activity is first created.     *    /@Override public    void OnCreate (Bundle savedinstancestate) {        super.oncreate (savedinstancestate);        Setcontentview (r.layout.main);        Btnok = (Button) Findviewbyid (r.id.btncallother);        Btnok.setonclicklistener (New Mybuttonlistener ());    }    Class Mybuttonlistener implements View.onclicklistener {        @Override public        void OnClick (view view) {            Intent Intent = new Intent ();            Intent.putextra ("Key", "value");            Intent.setclass (myactivity.this,otheractivity.class);            MyActivity.this.startActivity (intent);}}}    

Package Com.example.myapp;import Android.app.activity;import Android.content.intent;import android.os.Bundle; Import android.widget.textview;/** * Created by Chang on 14-9-17. */public class Otheractivity extends activity{    private TextView TV = null;    @Override    protected void onCreate (Bundle savedinstancestate) {        super.oncreate (savedinstancestate);        Setcontentview (r.layout.other);        Intent Intent = Getintent ();        String s = Intent.getstringextra ("key");        TV = (TextView) Findviewbyid (R.id.othertextview);        Tv.settext (s);    }}

Communication between Android activity