Android Studio Rendering Problems #393
Description
I've got this stack trace while rendering on Android Studio:
java.lang.NullPointerException at com.alamkanak.weekview.WeekView.drawHeaderRowAndEvents(WeekView.java:613) at com.alamkanak.weekview.WeekView.onDraw_Original(WeekView.java:488) at com.alamkanak.weekview.WeekView.onDraw(WeekView.java) at android.view.View.draw(View.java:17068) at android.view.View.draw(View.java:16976) at android.view.ViewGroup.drawChild_Original(ViewGroup.java:3764) at android.view.ViewGroup_Delegate.drawChild(ViewGroup_Delegate.java:61) at android.view.ViewGroup.drawChild(ViewGroup.java:3764) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3550) at android.view.View.draw(View.java:16974) at android.view.ViewGroup.drawChild_Original(ViewGroup.java:3764) at android.view.ViewGroup_Delegate.drawChild(ViewGroup_Delegate.java:61) at android.view.ViewGroup.drawChild(ViewGroup.java:3764) at android.support.design.widget.CoordinatorLayout.drawChild(CoordinatorLayout.java:1195) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3550) at android.view.View.draw(View.java:16974) at android.view.ViewGroup.drawChild_Original(ViewGroup.java:3764) at android.view.ViewGroup_Delegate.drawChild(ViewGroup_Delegate.java:61) at android.view.ViewGroup.drawChild(ViewGroup.java:3764) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3550) at android.view.View.draw(View.java:16974) at android.view.ViewGroup.drawChild_Original(ViewGroup.java:3764) at android.view.ViewGroup_Delegate.drawChild(ViewGroup_Delegate.java:61) at android.view.ViewGroup.drawChild(ViewGroup.java:3764) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3550) at android.view.View.draw(View.java:17071) at com.android.layoutlib.bridge.impl.RenderSessionImpl.render(RenderSessionImpl.java:394) at com.android.layoutlib.bridge.impl.RenderSessionImpl.render(RenderSessionImpl.java:505) at com.android.layoutlib.bridge.BridgeRenderSession.render(BridgeRenderSession.java:87) at com.android.ide.common.rendering.api.RenderSession.render(RenderSession.java:154) at com.android.ide.common.rendering.api.RenderSession.render(RenderSession.java:136) at com.android.tools.idea.rendering.RenderTask.lambda$renderInner$54(RenderTask.java:698) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745) This is my XML file:
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/content_schedule" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" app:layout_behavior="@string/appbar_scrolling_view_behavior" tools:context="<hidden>.app.MainActivity" tools:showIn="@layout/app_bar_main"> <com.alamkanak.weekview.WeekView android:id="@+id/weekView" android:layout_width="match_parent" android:layout_height="match_parent" app:eventTextColor="@android:color/white" app:textSize="12sp" app:hourHeight="60dp" app:headerColumnPadding="8dp" app:headerColumnTextColor="#8f000000" app:headerRowPadding="12dp" app:columnGap="8dp" app:noOfVisibleDays="5" app:headerRowBackgroundColor="#ffefefef" app:dayBackgroundColor="#05000000" app:todayBackgroundColor="#1848adff" app:headerColumnBackground="#ffffffff" android:layout_alignParentTop="true" android:layout_alignParentLeft="true" android:layout_alignParentStart="true" /> </RelativeLayout> The calendar works fine on the final product, but I can't preview it on Android Studio (sadly). It's annoying because I can't preview the other app layouts because of this problem.
Can you please solve it?
(From the method names, it looks like Android Studio doesn't provide the current time, so it doesn't work)
EDIT: Confirmed with the source code. On line 555 of WeekView, today() returns null.
It can be easily solved by replacing that line with Calendar today = today(); if(today == null) today = new GregorianCalendar(2000, 1, 1);