performance - Android CalendarView slowing down layout

Question

This is driving me crazy. I have a fragment in my Android app which is laid out using a RelativeLayout. Problem is that for some reason it takes ages to render, about 5 seconds just to load about 4 elements on screen.

One of the elements is a CalendarView and when I remove it it goes back to proper speeds (ie: instant). I'd imagine the problem is got to do with the way I'm asking Android to lay it out, must not make much sense or is inefficient or something.

Here's the XML file:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="20dp">

<TextView
     android:id="@+id/title"
     android:layout_width="0dp"
     android:layout_height="wrap_content"
     android:textStyle="bold"
     android:text="TODAY"
     android:textAppearance="?android:attr/textAppearanceLarge" 

     android:layout_alignParentLeft="true"
     android:layout_alignParentTop="true"
     android:layout_toLeftOf="@+id/time" />

<TextView
     android:id="@id/time"
     android:gravity="right"
     android:textStyle="bold"
     android:layout_width="100dp"
     android:layout_height="wrap_content"
     android:text="11:32"
     android:textAppearance="?android:attr/textAppearanceLarge"

     android:layout_alignParentRight="true" />

<TextView
    android:id="@+id/date_info"
    android:layout_margin="20dp"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Wednesday, 15th August 2012"
    android:textAppearance="?android:attr/textAppearanceMedium"

    android:layout_below="@id/title"
    android:layout_alignParentLeft="true" />

<CalendarView        
    android:id="@+id/calendar_view"
    android:layout_width="250dp"
    android:layout_height="250dp"
    android:background="@drawable/white_back_black_border"

    android:layout_alignParentBottom="true"
    android:layout_alignParentLeft="true" />
</RelativeLayout>

I've tried loads of different layout options but removing the Calendar seems to be the only thing that makes a difference.

Any insights would be greatly appreciated. Thanks

Answer 1

I've had this problem too, both with relative layouts and linear layouts. It doesn't seem to be layout-related.

Here is an example to see the error, just with a simple layout, no code at all:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".FechaHoraActivity" >

    <TimePicker
        android:id="@+id/timePicker1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="20dp" />

    <CalendarView
        android:id="@+id/calendarView1"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</LinearLayout>

And now just change the linear layout height to:

android:layout_height="match_parent"

With this change the problem is gone, at least in my Samsung Galaxy Tab 2

So it seems it is more "space" related, but I'm still not sure why this problem appears. And I haven't found any other interesting results on google searching "calendarview slow"...

EDIT Let's see if we can find an answer with a small bounty