onActivityResult

     btn_call.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubIntent call_intent=new Intent(Ex_activity_intentActivity.this,Input_numActivity.class);//有返回结果的跳转startActivityForResult(call_intent, CALL_REQUEST);//startActivity(call_intent);}});    }@Override//结果返回处理protected void onActivityResult(int requestCode, int resultCode, Intent data) {// TODO Auto-generated method stubsuper.onActivityResult(requestCode, resultCode, data);if (requestCode == CALL_REQUEST) {if (resultCode == RESULT_CANCELED) {Bundle bundle = data.getExtras();String phone_num=bundle.getString("PHONE_NUM");Toast.makeText(this, "拨打的号码是："+phone_num, 1000).show();}}}}