我在做一个简单的程序，既可以发送简单的信息，也可以在手机收到信息时收听。两者似乎都不起作用，手机对收到的信息根本没有React，当我点击发送一条信息时，我得到的信息是我设置的，而信息无法发送。
以下是主要的活动课程：

package com.example.smsapplication;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.telephony.SmsManager;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    private SMSListener SMSReceiver;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        SMSReceiver = new SMSListener();
        SendMessageButton();
    }

    private void SendMessageButton() {
        Button btn1 = (Button) findViewById(R.id.button1);
        btn1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                try {
                    SmsManager smsManager = SmsManager.getDefault();
                    smsManager.sendTextMessage("123456789", null, "text message", null, null);
                    Toast.makeText(
                            MainActivity.this,
                            "Message sent",
                            Toast.LENGTH_LONG
                    ).show();
                } catch (Exception e) {
                    Toast.makeText(getApplicationContext(),
                            "Message wasn't sent",
                            Toast.LENGTH_LONG).show();
                    e.printStackTrace();
                }
            }
        });
    }
}

以下是android清单：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.smsapplication">
    <uses-permission android:name="android.permission.RECEIVE_SMS"/>
    <uses-permission android:name="android.permission.READ_SMS" />
    <uses-permission android:name="android.permission.SEND_SMS"/>
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <receiver android:name="com.example.smsapplication.SMSListener"
            android:enabled="true">
            <intent-filter android:priority="2147483647">
                <action android:name="android.provider.Telephony.SMS_RECEIVED" />
            </intent-filter>
        </receiver>
    </application>

</manifest>

最后是listener类：

package com.example.smsapplication;

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

public class SMSListener extends BroadcastReceiver {
    public void onReceive(Context context, Intent 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();
                    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);
        }
    }
}