how to update notification with system battery status in android
<p>In notification i try to update my battery status. I create notification with service. But i don't know how to update Notofication with battery status:</p>

<p>I also read this docs:
<a href="http://developer.android.com/guide/topics/ui/notifiers/notifications.html" rel="nofollow">http://developer.android.com/guide/topics/ui/notifiers/notifications.html</a></p>

<p>MainActivity</p>

<pre><code>@Override
    public void onCreate(Bundle savedInstanceState) {

registerReceiver(batteryReceiver, new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
..
}


private BroadcastReceiver batteryReceiver = new BroadcastReceiver() {

        private int scale = -1;
        private int level = -1;
        private int voltage = -1;
        private int temp = -1;

        @Override
        public void onReceive(Context context, Intent intent) {
            level = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, -1);
            scale = intent.getIntExtra(BatteryManager.EXTRA_SCALE, -1);
            temp = intent.getIntExtra(BatteryManager.EXTRA_TEMPERATURE, -1);
            voltage = intent.getIntExtra(BatteryManager.EXTRA_VOLTAGE, -1);

            String ns = Context.NOTIFICATION_SERVICE;
            NotificationManager mNotificationManager = (NotificationManager)context.getSystemService(ns);
            long when = System.currentTimeMillis();

            String percent = ((level * 100) / scale) + "%";
            Notification notification = new Notification(R.drawable.call, percent, when);
            /* &lt;set your intents here&gt; */
            mNotificationManager.notify(7331, notification);

            Log.d(TAG, "Battery level is " + level + "/" + scale + ", temp is " + temp + ", voltage is " + voltage);
        }
    };
</code></pre>

<p>and i am using service which create Notification like</p>

<pre><code>private void showNotification() {
        Notification notification = new Notification(R.drawable.call, getString(R.string.notification_text), System.currentTimeMillis());
        Intent intent = new Intent(this, MainActivity.class);

        intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
        PendingIntent pi = PendingIntent.getActivity(this, 0, intent, 0);
        notification.setLatestEventInfo(this, getString(R.string.notification_label), getString(R.string.notification_text_short), pi);
        notification.flags |= Notification.FLAG_NO_CLEAR;
        startForeground(7331, notification);
    }
</code></pre>

<p>error:</p>

<pre><code>12-07 14:46:29.425: E/AndroidRuntime(25758): FATAL EXCEPTION: main
12-07 14:46:29.425: E/AndroidRuntime(25758): java.lang.RuntimeException: Error receiving broadcast Intent { act=android.intent.action.BATTERY_CHANGED flg=0x60000010 (has extras) } in com.xxx.xxx.MainActivity$1@41558b80
12-07 14:46:29.425: E/AndroidRuntime(25758):    at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:737)
12-07 14:46:29.425: E/AndroidRuntime(25758):    at android.os.Handler.handleCallback(Handler.java:605)
12-07 14:46:29.425: E/AndroidRuntime(25758):    at android.os.Handler.dispatchMessage(Handler.java:92)
12-07 14:46:29.425: E/AndroidRuntime(25758):    at android.os.Looper.loop(Looper.java:137)
12-07 14:46:29.425: E/AndroidRuntime(25758):    at android.app.ActivityThread.main(ActivityThread.java:4511)
12-07 14:46:29.425: E/AndroidRuntime(25758):    at java.lang.reflect.Method.invokeNative(Native Method)
12-07 14:46:29.425: E/AndroidRuntime(25758):    at java.lang.reflect.Method.invoke(Method.java:511)
12-07 14:46:29.425: E/AndroidRuntime(25758):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:980)
12-07 14:46:29.425: E/AndroidRuntime(25758):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:747)
12-07 14:46:29.425: E/AndroidRuntime(25758):    at dalvik.system.NativeStart.main(Native Method)
12-07 14:46:29.425: E/AndroidRuntime(25758): Caused by: java.lang.IllegalArgumentException: contentView required: pkg=com.xxx.xxx id=7331 notification=Notification(contentView=null vibrate=null,sound=null,defaults=0x0,flags=0x0)
12-07 14:46:29.425: E/AndroidRuntime(25758):    at android.os.Parcel.readException(Parcel.java:1331)
12-07 14:46:29.425: E/AndroidRuntime(25758):    at android.os.Parcel.readException(Parcel.java:1281)
12-07 14:46:29.425: E/AndroidRuntime(25758):    at 
android.app.INotificationManager$Stub$Proxy.enqueueNotificationWithTag(INotificationManager.java:317)
12-07 14:46:29.425: E/AndroidRuntime(25758):    at android.app.NotificationManager.notify(NotificationManager.java:127)
12-07 14:46:29.425: E/AndroidRuntime(25758):    at android.app.NotificationManager.notify(NotificationManager.java:106)
12-07 14:46:29.425: E/AndroidRuntime(25758):    at com.xxx.xxx.MainActivity$1.onReceive(MainActivity.java:72)
12-07 14:46:29.425: E/AndroidRuntime(25758):    at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:728)
12-07 14:46:29.425: E/AndroidRuntime(25758):    ... 9 more
</code></pre>
