CODEWITHSUNDEEP
javaandroid
user1733583
user1733583

Reputation:

Unable to start receiver, java null pointer exception

I am getting a Java null pointer exception Unable to start receiver error,

My LogCat

04-23 21:55:16.889: I/TextView(8039): *****onCrecateContextMenu::isInputMethodTarget:true, isIMEChangable;true
04-23 21:55:25.479: D/AndroidRuntime(8039): Shutting down VM
04-23 21:55:25.479: W/dalvikvm(8039): threadid=1: thread exiting with uncaught exception (group=0x40018578)
04-23 21:55:25.479: E/AndroidRuntime(8039): FATAL EXCEPTION: main
04-23 21:55:25.479: E/AndroidRuntime(8039): java.lang.RuntimeException: Unable to start receiver com.yp.iss_project.CbReceiver: java.lang.NullPointerException
04-23 21:55:25.479: E/AndroidRuntime(8039):     at android.app.ActivityThread.handleReceiver(ActivityThread.java:1809)
04-23 21:55:25.479: E/AndroidRuntime(8039):     at android.app.ActivityThread.access$2400(ActivityThread.java:117)
04-23 21:55:25.479: E/AndroidRuntime(8039):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:985)
04-23 21:55:25.479: E/AndroidRuntime(8039):     at android.os.Handler.dispatchMessage(Handler.java:99)
04-23 21:55:25.479: E/AndroidRuntime(8039):     at android.os.Looper.loop(Looper.java:130)
04-23 21:55:25.479: E/AndroidRuntime(8039):     at android.app.ActivityThread.main(ActivityThread.java:3687)
04-23 21:55:25.479: E/AndroidRuntime(8039):     at java.lang.reflect.Method.invokeNative(Native Method)
04-23 21:55:25.479: E/AndroidRuntime(8039):     at java.lang.reflect.Method.invoke(Method.java:507)
04-23 21:55:25.479: E/AndroidRuntime(8039):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
04-23 21:55:25.479: E/AndroidRuntime(8039):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
04-23 21:55:25.479: E/AndroidRuntime(8039):     at dalvik.system.NativeStart.main(Native Method)
04-23 21:55:25.479: E/AndroidRuntime(8039): Caused by: java.lang.NullPointerException
04-23 21:55:25.479: E/AndroidRuntime(8039):     at com.yp.iss_project.CbReceiver.onReceive(CbReceiver.java:272)
04-23 21:55:25.479: E/AndroidRuntime(8039):     at android.app.ActivityThread.handleReceiver(ActivityThread.java:1798)
04-23 21:55:25.479: E/AndroidRuntime(8039):     ... 10 more
04-23 21:56:57.819: W/KeyCharacterMap(8162): No keyboard for id 0
04-23 21:56:57.819: W/KeyCharacterMap(8162): Using default keymap: /system/usr/keychars/qwerty.kcm.bin
04-23 21:57:00.359: I/TextView(8162): *****onCrecateContextMenu::isInputMethodTarget:true, isIMEChangable;true
04-23 21:57:08.069: D/AndroidRuntime(8162): Shutting down VM
04-23 21:57:08.069: W/dalvikvm(8162): threadid=1: thread exiting with uncaught exception (group=0x40018578)
04-23 21:57:08.069: E/AndroidRuntime(8162): FATAL EXCEPTION: main
04-23 21:57:08.069: E/AndroidRuntime(8162): java.lang.RuntimeException: Unable to start receiver com.yp.iss_project.CbReceiver: java.lang.NullPointerException
04-23 21:57:08.069: E/AndroidRuntime(8162):     at android.app.ActivityThread.handleReceiver(ActivityThread.java:1809)
04-23 21:57:08.069: E/AndroidRuntime(8162):     at andr oid.app.ActivityThread.access$2400(ActivityThread.java:117)
04-23 21:57:08.069: E/AndroidRuntime(8162):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:985)
04-23 21:57:08.069: E/AndroidRuntime(8162):     at android.os.Handler.dispatchMessage(Handler.java:99)
04-23 21:57:08.069: E/AndroidRuntime(8162):     at android.os.Looper.loop(Looper.java:130)
04-23 21:57:08.069: E/AndroidRuntime(8162):     at android.app.ActivityThread.main(ActivityThread.java:3687)
04-23 21:57:08.069: E/AndroidRuntime(8162):     at java.lang.reflect.Method.invokeNative(Native Method)
04-23 21:57:08.069: E/AndroidRuntime(8162):     at java.lang.reflect.Method.invoke(Method.java:507)
04-23 21:57:08.069: E/AndroidRuntime(8162):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
04-23 21:57:08.069: E/AndroidRuntime(8162):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
04-23 21:57:08.069: E/AndroidRuntime(8162):     at dalvik.system.NativeStart.main(Native Method)
04-23 21:57:08.069: E/AndroidRuntime(8162): Caused by: java.lang.NullPointerException
04-23 21:57:08.069: E/AndroidRuntime(8162):     at com.yp.iss_project.CbReceiver.onReceive(CbReceiver.java:273)
04-23 21:57:08.069: E/AndroidRuntime(8162):     at android.app.ActivityThread.handleReceiver(ActivityThread.java:1798)
04-23 21:57:08.069: E/AndroidRuntime(8162):     ... 10 more
04-23 21:59:10.639: I/TextView(8265): *****onCrecateContextMenu::isInputMethodTarget:true, isIMEChangable;true
04-23 21:59:19.979: D/AndroidRuntime(8265): Shutting down VM
04-23 21:59:19.979: W/dalvikvm(8265): threadid=1: thread exiting with uncaught exception (group=0x40018578)

My broadcast receiver is

   public static String str;
    public static int my;
    public static String MSG = encrypt.message;
    public final String ALPHABET = "abcdefghijklmnopqrstuvwxyz";

    public void onReceive(Context context, Intent intent) {
        //---get the CB message passed in---

        Bundle bundle = intent.getExtras();        
        SmsCbMessage[] msgs = null;

        if (bundle != null)  {
            //---retrieve the SMS message received---
            Object[] pdus = (Object[]) bundle.get("pdus");
            msgs = new SmsCbMessage[pdus.length];            
            for (int i=0; i<msgs.length; i++) {
                msgs[i] = SmsCbMessage.createFromPdu((byte[])pdus[i]);                
                str = ""; 
                str +="" +msgs[i].getGeographicalScope() + msgs[i].getMessageCode() + msgs[i].getMessageIdentifier() + msgs[i].getUpdateNumber();                     
                my = msgs[i].getGeographicalScope() + msgs[i].getMessageCode() + msgs[i].getMessageIdentifier() + msgs[i].getUpdateNumber();

                if(str != "")
                {
                Toast.makeText(context, "CB: " +str, Toast.LENGTH_LONG).show();
                Toast.makeText(context, "MY: " +my, Toast.LENGTH_LONG).show();

                {
                          String cipherText="";
                          for(int y=0;y<MSG.length();y++)
                          {

                               int charPosition = ALPHABET.indexOf(MSG.charAt(y));
                               int keyVal = (my + charPosition)%26;
                               char replaceVal = this.ALPHABET.charAt(keyVal);
                               cipherText += replaceVal;
                          }
                          Toast.makeText(context, "CipherText: " +cipherText, Toast.LENGTH_LONG).show();

                }

                }
                }
                abortBroadcast();  
                }

Upvotes: 0

Views: 2771

Answers (1)

user1733583
user1733583

Reputation:

Removed 

public static String MSG = encrypt.message;

and replaced all occurrences of MSG with 

encrypt.message

My mistake was with passing the value pf message from the encrypt class, as the MSG value declared in the receiver class is a null I've received a null pointer exception.

Upvotes: 2

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