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POHow to pass an Arraylist from Activity to Widget
 

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  1. POHow to pass an Arraylist from Activity to Widget
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    <p>I am trying to pass an arraylist from activity to widget but my app crushes at the my widget provider.</p> <p>I gave details below.</p> <p>Here is part of code from my first activity:</p> <pre><code> Intent intent1 = new Intent(MainActivity.this, AppProviderWidget.class); intent1.setAction("android.appwidget.action.APPWIDGET_UPDATE"); // Use an array and EXTRA_APPWIDGET_IDS instead of // AppWidgetManager.EXTRA_APPWIDGET_ID, // since it seems the onUpdate() is only fired on that: int[] ids = widgetIDs; intent1.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, ids); intent1.putExtra("widgetlist", result); sendBroadcast(intent1); </code></pre> <p><strong>I sent data is here :</strong></p> <pre><code> intent1.putExtra("widgetlist", result); </code></pre> <p><strong>And code from the AppProviderWidget onReceive method</strong></p> <pre><code> @Override public void onReceive(Context context, Intent intent) { super.onReceive(context, intent); ArrayList&lt;DuyuruHaber&gt; arl = new ArrayList&lt;DuyuruHaber&gt;(); arl = (ArrayList&lt;DuyuruHaber&gt;) intent .getSerializableExtra("widgetlist"); try { liste = arl; } catch (Exception e) { Log.w("Log",e.toString()); }} </code></pre> <p><strong>AppProviderWidget.onReceive(AppProviderWidget.java:170)</strong></p> <pre><code>arl = (ArrayList&lt;DuyuruHaber&gt;) intent .getSerializableExtra("widgetlist"); </code></pre> <p><strong>my log cat</strong></p> <pre><code>08-23 16:28:01.684: E/AndroidRuntime(10067): FATAL EXCEPTION: main 08-23 16:28:01.684: E/AndroidRuntime(10067): java.lang.RuntimeException: Unable to start receiver widget.AppProviderWidget: java.lang.NullPointerException 08-23 16:28:01.684: E/AndroidRuntime(10067): at android.app.ActivityThread.handleReceiver(ActivityThread.java:2821) 08-23 16:28:01.684: E/AndroidRuntime(10067): at android.app.ActivityThread.access$3200(ActivityThread.java:125) 08-23 16:28:01.684: E/AndroidRuntime(10067): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2083) 08-23 16:28:01.684: E/AndroidRuntime(10067): at android.os.Handler.dispatchMessage(Handler.java:99) 08-23 16:28:01.684: E/AndroidRuntime(10067): at android.os.Looper.loop(Looper.java:123) 08-23 16:28:01.684: E/AndroidRuntime(10067): at android.app.ActivityThread.main(ActivityThread.java:4627) 08-23 16:28:01.684: E/AndroidRuntime(10067): at java.lang.reflect.Method.invokeNative(Native Method) 08-23 16:28:01.684: E/AndroidRuntime(10067): at java.lang.reflect.Method.invoke(Method.java:521) 08-23 16:28:01.684: E/AndroidRuntime(10067): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858) 08-23 16:28:01.684: E/AndroidRuntime(10067): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 08-23 16:28:01.684: E/AndroidRuntime(10067): at dalvik.system.NativeStart.main(Native Method) 08-23 16:28:01.684: E/AndroidRuntime(10067): Caused by: java.lang.NullPointerException 08-23 16:28:01.684: E/AndroidRuntime(10067): at widget.AppProviderWidget.onReceive(AppProviderWidget.java:170) 08-23 16:28:01.684: E/AndroidRuntime(10067): at android.app.ActivityThread.handleReceiver(ActivityThread.java:2810) </code></pre> <p><em>Thanks for the help.</em></p>
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