Message message = new Message();

message.what = SUCCESS_SEND;

handler.sendMessage(message);

private Handler handler = new Handler() {

        public void handleMessage(android.os.Message msg) {

            String text = null;

            switch (msg.what) {

            case CONTENT_NULL:

                text = "反馈内容不能为空";

                break;

            case SUCCESS_SEND:

                text = "谢谢您的反馈";

            default:

                break;

            }

            Toast toast = Toast.makeText(FeedbackActivity.this, text,

                    Toast.LENGTH_LONG);

            toast.setGravity(Gravity.TOP, 0, 0);

            toast.show();

            Log.d(TAG, text);

        };

    };