I’ve tried different things but things are still not ‘going’<\/p>\n
I have an activity. In this, when I press one of the options in the menu, I need to popup a dialog and in that dialog a listview of string values wich I get out of an string-arrays xml.<\/p>\n
I’ve already deleted some code to clean it up but still no luck…<\/p>\n
myList.xml<\/p>\n
\n\n<\/code><\/pre>\nmy custom dialog<\/p>\n
public class Selector extends Dialog {\n\nString[] testArray;\nprotected Selector(Context context) {\n super(context);\n\n ListView lijstje = (ListView) findViewById(R.layout.mylist);\n testArray = context.getResources().getStringArray(R.array.currencies);\n Log.d(\"test\",testArray[0]);\/\/wich shows me the 1e string and it's working\n ArrayAdapter adapter = new ArrayAdapter(this.getContext(),android.R.layout.simple_list_item_1, testArray);\n lijstje.setAdapter(adapter);\n\n LayoutInflater li = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);\n View v = li.inflate(R.layout.mylist, null, false);\n this.setContentView(v);\n\n}\n\n}\n<\/code><\/pre>\nin my main activity I have I function<\/p>\n
public void showPopup()\n{ \n Selector test = new Selector(this);\n test.show();\n}\n<\/code><\/pre>\nwhen I put lijstje.setAdapter(adapter); in comment my app is not crashing but the dialog is very small and empty<\/p>\n
02-24 22:14:29.705: D\/AndroidRuntime(28734): Shutting down VM\n02-24 22:14:29.705: W\/dalvikvm(28734): threadid=1: thread exiting with uncaught exception (group=0x40a4e1f8)\n02-24 22:14:29.715: E\/AndroidRuntime(28734): FATAL EXCEPTION: main\n02-24 22:14:29.715: E\/AndroidRuntime(28734): java.lang.NullPointerException\n02-24 22:14:29.715: E\/AndroidRuntime(28734): at be.veeteedev.OmzetterActivity.showPopup(OmzetterActivity.java:83)\n02-24 22:14:29.715: E\/AndroidRuntime(28734): at be.veeteedev.OmzetterActivity.onOptionsItemSelected(OmzetterActivity.java:59)\n02-24 22:14:29.715: E\/AndroidRuntime(28734): at android.app.Activity.onMenuItemSelected(Activity.java:2502)\n02-24 22:14:29.715: E\/AndroidRuntime(28734): at com.android.internal.policy.impl.PhoneWindow.onMenuItemSelected(PhoneWindow.java:950)\n02-24 22:14:29.715: E\/AndroidRuntime(28734): at com.android.internal.view.menu.MenuBuilder.dispatchMenuItemSelected(MenuBuilder.java:735)\n02-24 22:14:29.715: E\/AndroidRuntime(28734): at com.android.internal.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:149)\n02-24 22:14:29.715: E\/AndroidRuntime(28734): at com.android.internal.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:874)\n02-24 22:14:29.715: E\/AndroidRuntime(28734): at com.android.internal.view.menu.ListMenuPresenter.onItemClick(ListMenuPresenter.java:163)\n02-24 22:14:29.715: E\/AndroidRuntime(28734): at android.widget.AdapterView.performItemClick(AdapterView.java:292)\n02-24 22:14:29.715: E\/AndroidRuntime(28734): at android.widget.AbsListView.performItemClick(AbsListView.java:1058)\n02-24 22:14:29.715: E\/AndroidRuntime(28734): at android.widget.AbsListView$PerformClick.run(AbsListView.java:2514)\n02-24 22:14:29.715: E\/AndroidRuntime(28734): at android.widget.AbsListView$1.run(AbsListView.java:3168)\n02-24 22:14:29.715: E\/AndroidRuntime(28734): at android.os.Handler.handleCallback(Handler.java:605)\n02-24 22:14:29.715: E\/AndroidRuntime(28734): at android.os.Handler.dispatchMessage(Handler.java:92)\n02-24 22:14:29.715: E\/AndroidRuntime(28734): at android.os.Looper.loop(Looper.java:137)\n02-24 22:14:29.715: E\/AndroidRuntime(28734): at android.app.ActivityThread.main(ActivityThread.java:4424)\n02-24 22:14:29.715: E\/AndroidRuntime(28734): at java.lang.reflect.Method.invokeNative(Native Method)\n02-24 22:14:29.715: E\/AndroidRuntime(28734): at java.lang.reflect.Method.invoke(Method.java:511)\n02-24 22:14:29.715: E\/AndroidRuntime(28734): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)\n02-24 22:14:29.715: E\/AndroidRuntime(28734): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)\n02-24 22:14:29.715: E\/AndroidRuntime(28734): at dalvik.system.NativeStart.main(Native Method)\n<\/code><\/pre>\n\n- \n
I’m not sure this will magically solve all you’re problems, but in your Selector constructor you have the following assignment:<\/p>\n
ListView lijstje = (ListView) findViewById(R.layout.mylist);\n<\/code><\/pre>\nNote how you are trying to find a View with a layout id. It should say something like R.id.mylist<\/code> in stead. Currently it’ll resolve to null<\/code>, hence the NullPointerException<\/code>.<\/p>\nAlso, you’re doing setContentView(...)<\/code> all the way at the end. If you’re trying to inflate views from the mentioned layout file (R.layout.mylist<\/code>), make sure you do this after<\/strong> having set the content view.<\/p>\nBy the way, if you don’t have a fancy layout for the dialog displaying a list, you can probably suffice with the default AlertDialog builder. Have a read here, samples included. For some help on custom dialogs, look further down the bottom of that same page.<\/p>\n<\/li>\n
- \n
I’m guessing that this is your problem. There is nothing to find the view by<\/p>\n
ListView lijstje = (ListView) findViewById(R.layout.mylist);\n<\/code><\/pre>\nlijstje is null when called this way lijstje is a layout not a view<\/p>\n
also set content view should be before anything else<\/p>\n
public class Selector extends Dialog {\n\nString[] testArray;\nprotected Selector(Context context) {\n super(context);\n setContentView(R.layout.list);\n\n ListView lijstje = (ListView) findViewById(R.id.mylist);\n testArray = context.getResources().getStringArray(R.array.currencies);\n Log.d(\"test\",testArray[0]);\/\/wich shows me the 1e string and it's working\n ArrayAdapter adapter = new ArrayAdapter (this.getContext(),android.R.layout.simple_list_item_1, testArray);\n lijstje.setAdapter(adapter);\n}\n<\/code><\/pre>\nmylist.xml<\/p>\n
\n\n \n\n\n<\/code><\/pre>\n<\/li>\n- \n
check the following links dialogwithlistview stackoverflow anddev<\/p>\n<\/li>\n<\/ol>\n
Originally posted 2013-12-02 21:02:14. <\/small><\/p>","protected":false},"excerpt":{"rendered":"
I’ve tried different things but things are still not ‘going’ I have an activity. In this, when I press one of the options in the menu, I need to popup a dialog and in that dialog a listview of string values wich I get out of an string-arrays xml. I’ve already deleted some code to […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1862","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/1862","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/comments?post=1862"}],"version-history":[{"count":0,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/1862\/revisions"}],"wp:attachment":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/media?parent=1862"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/categories?post=1862"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/tags?post=1862"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}