Hi Prasad, It seems that you are getting error in context.registerReceiver(myReceiver, verifyFilter);
Probably because the ACTION_VERIFY_VALUE might not be properly defined in Intent.java, please varify on how to register new Intent action in AOSP. As per all your above code everything looks fine, just the registration of that intent filter is causing the Exception, So cross check the intent filter availability in AOSP. Hope it helps! Shridutt Kothari Impetus Infotech Limited [email protected] On Tuesday, September 17, 2013 5:58:12 PM UTC+5:30, Prasad wrote: > > Hi All, > > In my Android project I am reading a data from hardware device. I have > Service class which contains a thread reading continuously data from > hardware. while reading data from hardware I will check true = 1 or false > = 0 values. My code is like below, > > public class MyService extends IMyservice.Stub{ > > class MyThread extends Thread{ > > public void run(){ > > int value = dataFromHardware(); > updateValueToUi(value); > } > } > > } > > The above class in in a path of AOSP: > frameworks/base/services/java/com/android/server/MyService.java > > In the above code the thread will start when MyService class gets a event > from user and it reads data from hardware giving value. Now I want that > value to pass to UI. For that I am creating updateValueToUi(value) method > so that I can Broadcast it to user. Here I dont know how to broadcast above > value to UI. Compared with other code and I tried following mechanism to > pass value to UI but it's giving NullpointerException > Here is a code, > > public void updateValueToUi(int value){ > > Intent intent = new Intent(Intent.ACTION_VERIFY_VALUE); > int myValue = value; > intent.putExtra("verifyKey", myValue); > intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); > mContext.sendBroadcastAsUser(intent, UserHandle.CURRENT); > } > > The value 'ACTION_VERIFY_VALUE' I defined in Intent.java class. and > receiving in application side like below > > public BroadcastReceiver myReceiver = new BroadcastReceiver{ > > public void onReceive(Context context, Intent intent){ > > > if("android.intent.action.ACTION_VERIFY_VALUE".equals(intent.getAction())){ > > updateVerifyValue(intent); > } > } > > myMethod(){ > > verifyFilter = new IntentFilter(); > verifyFilter.addAction(Intent.ACTION_VERIFY_VALUE); > context.registerReceiver(myReceiver, verifyFilter); > Toast.makeText(context, "verify clicked", 30).show(); > } > } > > The above code giving me below eroor : > > FATAL EXCEPTION: main > E/AndroidRuntime( 3934): java.lang.NullPointerException > E/AndroidRuntime( 3934): at > android.app.ActivityManagerProxy.registerReceiver(ActivityManagerNative.java:2097) > E/AndroidRuntime( 3934): at > android.app.ContextImpl.registerReceiverInternal(ContextImpl.java:1338) > E/AndroidRuntime( 3934): at > android.app.ContextImpl.registerReceiver(ContextImpl.java:1306) > E/AndroidRuntime( 3934): at > android.app.ContextImpl.registerReceiver(ContextImpl.java:1300) > E/AndroidRuntime( 3934): at > android.content.ContextWrapper.registerReceiver(ContextWrapper.java:423) > E/AndroidRuntime( 3934): at > com.example.biometricclient.BioClient$2.onClick(BioClient.java:97) // > my class in app layer > E/AndroidRuntime( 3934): at android.view.View.performClick(View.java:4202) > E/AndroidRuntime( 3934): at > android.view.View$PerformClick.run(View.java:17340) > E/AndroidRuntime( 3934): at > android.os.Handler.handleCallback(Handler.java:725) > E/AndroidRuntime( 3934): at > android.os.Handler.dispatchMessage(Handler.java:92) > E/AndroidRuntime( 3934): at android.os.Looper.loop(Looper.java:137) > E/AndroidRuntime( 3934): at > android.app.ActivityThread.main(ActivityThread.java:5039) > E/AndroidRuntime( 3934): at java.lang.reflect.Method.invokeNative(Native > Method) > E/AndroidRuntime( 3934): at > java.lang.reflect.Method.invoke(Method.java:511) > E/AndroidRuntime( 3934): at > com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) > E/AndroidRuntime( 3934): at > com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) > E/AndroidRuntime( 3934): at dalvik.system.NativeStart.main(Native Method) > W/ActivityManager( 2716): Force finishing activity > com.example.biometricclient/.BioClient > > > In between this i have Manager class and AIDL file in > framework/base/core/java/android/os to access API from MyService to App > layer. > > Is I am following right way ? If no how to solve this problem. > > > -- -- unsubscribe: [email protected] website: http://groups.google.com/group/android-porting --- You received this message because you are subscribed to the Google Groups "android-porting" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
