Home/ Questions/Q 9215777
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-06-18T02:16:43+00:00

I have an app that I’m trying to set up so that when I

  • 0

I have an app that I’m trying to set up so that when I receive a text containing a certain phrase (Currently set to “This is a test” just to test it), a button onClick event will fire. If my message receiver was in my main activity, I could simply call .performClick(). However, I cant get it to work unless the message receiver is in a seperate class.

MessageReceiver.java

package com.defsoftsol.snow.alert;

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 MessageReceiver extends BroadcastReceiver 
{
    public void onReceive(Context context, Intent intent) 
    {
        Bundle pudsBundle = intent.getExtras();
        Object[] pdus = (Object[]) pudsBundle.get("pdus");
        SmsMessage messages =SmsMessage.createFromPdu((byte[]) pdus[0]);    
        Log.i("MessageBody",  messages.getMessageBody());
        if(messages.getMessageBody().contains("This is a test")) 
        {
            Toast.makeText(context, "It worked", Toast.LENGTH_LONG).show();
        }
    }
}

How can I do a performClick() on a button thats in MainActivity.java? Can I somehow access the View from that class?

manifest entry

<receiver android:name=".MainActivity.MessageReceiver" android:exported="true">
    <intent-filter>
        <action android:name="android.provider.Telephony.SMS_RECEIVED"></action>
    </intent-filter>
</receiver>

Logcat from crash when receive text with receiver in mainactivity.java

01-30 20:31:57.002: E/AndroidRuntime(32555): FATAL EXCEPTION: main
01-30 20:31:57.002: E/AndroidRuntime(32555): java.lang.RuntimeException: Unable to instantiate receiver com.defsoftsol.snow.alert.MainActivity.MessageReceiver: java.lang.ClassNotFoundException: com.defsoftsol.snow.alert.MainActivity.MessageReceiver
01-30 20:31:57.002: E/AndroidRuntime(32555):    at android.app.ActivityThread.handleReceiver(ActivityThread.java:2100)
01-30 20:31:57.002: E/AndroidRuntime(32555):    at android.app.ActivityThread.access$1500(ActivityThread.java:123)
01-30 20:31:57.002: E/AndroidRuntime(32555):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1197)
01-30 20:31:57.002: E/AndroidRuntime(32555):    at android.os.Handler.dispatchMessage(Handler.java:99)
01-30 20:31:57.002: E/AndroidRuntime(32555):    at android.os.Looper.loop(Looper.java:137)
01-30 20:31:57.002: E/AndroidRuntime(32555):    at android.app.ActivityThread.main(ActivityThread.java:4428)
01-30 20:31:57.002: E/AndroidRuntime(32555):    at java.lang.reflect.Method.invokeNative(Native Method)
01-30 20:31:57.002: E/AndroidRuntime(32555):    at java.lang.reflect.Method.invoke(Method.java:511)
01-30 20:31:57.002: E/AndroidRuntime(32555):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:787)
01-30 20:31:57.002: E/AndroidRuntime(32555):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:554)
01-30 20:31:57.002: E/AndroidRuntime(32555):    at dalvik.system.NativeStart.main(Native Method)
01-30 20:31:57.002: E/AndroidRuntime(32555): Caused by: java.lang.ClassNotFoundException: com.defsoftsol.snow.alert.MainActivity.MessageReceiver
01-30 20:31:57.002: E/AndroidRuntime(32555):    at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:61)
01-30 20:31:57.002: E/AndroidRuntime(32555):    at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
01-30 20:31:57.002: E/AndroidRuntime(32555):    at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
01-30 20:31:57.002: E/AndroidRuntime(32555):    at android.app.ActivityThread.handleReceiver(ActivityThread.java:2095)
01-30 20:31:57.002: E/AndroidRuntime(32555):    ... 10 more
Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    you can make MessageReceiver as a inner class of mainactivity, and then, you can call button.performClick in your mainactivity

    public class MainAcitivity extends Activity
{
   private Button button;
   ....

   ....

   public static class MessageReceiver extends BroadcastReceiver 
   {
       public void onReceive(Context context, Intent intent) 
      {
           button.performClick();
      }
   }

 }


<receiver android:name=".MainActivity$MessageReceiver" android:exported="true">
<intent-filter>
    <action android:name="android.provider.Telephony.SMS_RECEIVED"></action>
</intent-filter>

    • 0