onActivityResult

btn_call.setOnClickListener(new OnClickListener() {			
			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				Intent 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 stub
		super.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();				
			}
		}
	}
}