public void handleMessage(Message msg) { if (waitingDialog != null) { waitingDialog.dismiss(); } switch (msg.what) { case 0: Toast.makeText(getApplicationContext(), "信件发送成功!", Toast.LENGTH_SHORT).show(); onBackPressed(); break; case 1: Toast.makeText(getApplicationContext(), "信件发送失败!", Toast.LENGTH_SHORT).show(); break; } }