java - 收到某些短信时如何在android上显示文本

Question

我是 android 开发和 java 编程的新手。我只是想知道如果收到此“特定”消息，如何打印或显示特定文本。 I got this code on the web on how to receive and read SMS .

ReadIncomingSms.java

package readnewsms.adk;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.telephony.SmsManager;
import android.telephony.SmsMessage;
import android.util.Log;
import android.widget.Toast;

public class IncomingSms extends BroadcastReceiver {

// Get the object of SmsManager
final SmsManager sms = SmsManager.getDefault();
 
public void onReceive(Context context, Intent intent) {
 
    // Retrieves a map of extended data from the intent.
    final Bundle bundle = intent.getExtras();

    try {
         
        if (bundle != null) {
             
            final Object[] pdusObj = (Object[]) bundle.get("pdus");
             
            for (int i = 0; i < pdusObj.length; i++) {
                 
                SmsMessage currentMessage = SmsMessage.createFromPdu((byte[])    pdusObj[i]);
                String phoneNumber = currentMessage.getDisplayOriginatingAddress();
                 
                String senderNum = phoneNumber;
                String message = currentMessage.getDisplayMessageBody();
                
                

                Log.i("SmsReceiver", "senderNum: "+ senderNum + "; message: " + message);
                 
                
               // Show Alert
                int duration = Toast.LENGTH_LONG;
                Toast toast = Toast.makeText(context, 
                             "senderNum: "+ senderNum + ", message: " + message, duration);
                toast.show();
                
                
            }
            // end for loop
          } // bundle is null 
    } catch (Exception e) {
        Log.e("SmsReceiver", "Exception smsReceiver" +e);
         
    }
}    

然后我在 toast.show() 之后添加了这段代码；仍在循环中

if  (message.equals(("1"))){
                    System.out.println("user sends 1");
                } else {
                    System.out.println("other");
                }

我该怎么做才能在屏幕上显示这些消息？或者如果消息包含特定值，我如何评估代码，然后我将根据发送的消息打印特定消息。例如，如果 INCOMING 消息包含 1，则应用程序将显示用户发送 1。

Answer 1

看起来您想在屏幕上放置一个Toast。这会在底部显示一条小消息。代码如下所示:

if  (message.equals(("1"))){
    Toast toast = Toast.makeText(context, "User sent 1");
    toast.show();
                } else {
                    Toast toast = Toast.makeText(context, "Other);
                    toast.show();
                }