Question

如何阻止我的应用程序多次显示Toast消息？每当我发送短信是否是一个，两个或更多联系人时，它总是多次显示吐司消息。有时吐司看起来好像在闪烁，同时显示“短信发送”信息大约2,4,18次。我认为它将“短信发送”的消息加倍。如果我将它发送到1号码，它会显示2，依此类推

try {

                    String message = "firealert";
                    String additionalMessage = send_input.getText().toString();
                    info.open();
                    ArrayList<String> data = info.getContactNumber();
                    info.close();
                    for(String contactNum : data)
                    {
                        sendSMS("0".concat(contactNum), message+" "+additionalMessage);
                        //sendSMS(contactNum, message+" "+additionalMessage);
                    }
                    } catch (Exception e) {
                        Toast.makeText(getApplicationContext(),
                        "SMS failed, please try again later!",
                        Toast.LENGTH_LONG).show();
                        e.printStackTrace();
                    }

并使用此代码显示短信状态

private void sendSMS(String phoneNumber, String message)
{        
        String SENT = "SMS_SENT";
        String DELIVERED = "SMS_DELIVERED";

        PendingIntent sentPI = PendingIntent.getBroadcast(this, 0,
            new Intent(SENT), 0);

        PendingIntent deliveredPI = PendingIntent.getBroadcast(this, 0,
            new Intent(DELIVERED), 0);

        //---when the SMS has been sent---
        registerReceiver(new BroadcastReceiver()
        {
            public void onReceive(Context arg0, Intent arg1)
            {
                switch (getResultCode())
                {
                    case Activity.RESULT_OK:
                        Toast.makeText(getBaseContext(), "SMS sent", 
                                Toast.LENGTH_SHORT).show();
                        break;
                    case SmsManager.RESULT_ERROR_GENERIC_FAILURE:
                        Toast.makeText(getBaseContext(), "Generic failure", 
                                Toast.LENGTH_SHORT).show();
                        break;
                    case SmsManager.RESULT_ERROR_NO_SERVICE:
                        Toast.makeText(getBaseContext(), "No service", 
                                Toast.LENGTH_SHORT).show();
                        break;
                    case SmsManager.RESULT_ERROR_NULL_PDU:
                        Toast.makeText(getBaseContext(), "Null PDU", 
                                Toast.LENGTH_SHORT).show();
                        break;
                    case SmsManager.RESULT_ERROR_RADIO_OFF:
                        Toast.makeText(getBaseContext(), "Radio off", 
                                Toast.LENGTH_SHORT).show();
                        break;
                }
            }
        }, new IntentFilter(SENT));

        //---when the SMS has been delivered---
        registerReceiver(new BroadcastReceiver()
        {
            @Override
            public void onReceive(Context arg0, Intent arg1) 
            {
                switch (getResultCode())
                {
                    case Activity.RESULT_OK:
                        Toast.makeText(getBaseContext(), "SMS delivered", 
                                Toast.LENGTH_SHORT).show();
                        break;
                    case Activity.RESULT_CANCELED:
                        Toast.makeText(getBaseContext(), "SMS not delivered", 
                                Toast.LENGTH_SHORT).show();
                        break;                        
                }
            }
        }, new IntentFilter(DELIVERED));        

        SmsManager sms = SmsManager.getDefault();
        sms.sendTextMessage(phoneNumber, null, message, sentPI, deliveredPI);        
}

Answer 1

您可以做的是创建一个Toast变量。

private Toast t;

if(t!=null)    
   t.cancel();
Toast.makeText(getBaseContext(), "SMS sent", 
                                Toast.LENGTH_SHORT).show();

OR

if(t==null)    
    Toast.makeText(getBaseContext(), "SMS sent", 
                                    Toast.LENGTH_SHORT).show();

Answer 2

短信的内容是否超过160个字符？您是否有可能看到Toast（content.length（）/ 160）次？短信可能分为几个部分。

吐司消息看起来好像在闪烁 - 安卓

2 个答案: