Android ListView Divider

Question

I have this code    lt ListView      android layout width  wrap content       android layout height  wrap content       android id    id cashItemsList       android cacheColorHint   00000000       android divider   drawable list divider  gt  lt  ListView gt    where  drawable list divider is    lt shape  xmlns android  http   schemas android com apk res android   android shape  line  gt    lt stroke    android width  1dp     android color   8F8F8F     android dashWidth  1dp     android dashGap  1dp    gt   lt  shape gt    but I can t see any divider

User · Answer

Folks  here s why you should use 1px instead of 1dp or 1dip  if you specify 1dp or 1dip  Android will scale that down  On a 120dpi device  that becomes something like 0 75px translated  which rounds to 0  On some devices  that translates to 2-3 pixels  and it usually looks ugly or sloppy  For dividers  1px is the correct height if you want a 1 pixel divider and is one of the exceptions for the  everything should be dip  rule  It ll be 1 pixel on all screens  Plus  1px usually looks better on hdpi and above screens   It s not 2012 anymore  edit  you may have to switch over to dp dip starting at a certain screen density

User · Answer

I had the same issue  However making the view 1px didn t seem to work on my original Nexus 7  I noticed that the screen density was 213 which is less than the 240 used in xhdpi  So it was thinking the device was an mdpi density    My solution was to make it so the dimens folder had a dividerHeight parameter  I set it to  2dp in the values-mdpi folder but 1dp in the values-hdpi etc folders

User · Answer

Add android dividerHeight  1px  and it will work     lt ListView      android layout width  wrap content       android layout height  wrap content       android id    id cashItemsList       android cacheColorHint   00000000       android divider   drawable list divider  android dividerHeight  1px  gt  lt  ListView gt

User · Answer

set android dividerHeight  1dp        lt ListView             android id    id myphnview              android layout width  fill parent              android layout height  wrap content              android layout below   drawable dividerheight              android background   E9EAEC              android clickable  true      android divider   color white                  android dividerHeight  1dp                  android headerDividersEnabled  true   gt       lt  ListView gt

User · Answer

The android docs warn about things dissappearing due to round-off error    Perhaps try dp instead of px  and perhaps also try   1 first to see if it is the round-off problem   see http   developer android com guide practices screens support html testing  for the section  Images with 1 pixel height width

User · Answer

you forgot an  r  at the end of divider in your divider xml layout  you call the layout  drawable list divider but your divider xml is named  list divide

User · Answer

From the doc   public void setDivider Drawable divider  on ListView         Sets the drawable that will be drawn between each item in the list  If the drawable does    not have an intrinsic height  you should also call   link  setDividerHeight int          param divider The drawable to use        Looks like setDividerHeight   must be called in order for the divider to show up if it has no intrinsic height

User · Answer

From the doc      file location       res drawable filename xml       The filename is used as the resource ID    basically  you ll need to put a file named list divider xml in res drawable  so you can access it as R drawable list divider  if you can access it that way  then you can use android divider   drawable list divider  in the XML for ListView

User · Answer

The problem you re having stems from the fact that you re missing android dividerHeight  which you need  and the fact that you re trying to specify a line weight in your drawable  which you can t do with dividers for some odd reason   Essentially to get your example to work you could  do something like the following   Create your drawable as either a rectangle or a line  either works you just can t try to set any dimensions on it  so either    lt shape xmlns android  http   schemas android com apk res android  android shape  line  gt        lt stroke android color   8F8F8F  android dashWidth  1dp  android dashGap  1dp    gt   lt  shape gt    OR    lt shape xmlns android  http   schemas android com apk res android   android shape  rectangle  gt        lt solid android color   8F8F8F   gt   lt  shape gt    Then create a custom style  just a preference but I like to be able to reuse stuff    lt style name  dividedListStyle  parent   android style Widget ListView  gt       lt item name  android cacheColorHint  gt  android color transparent lt  item gt       lt item name  android divider  gt  drawable list divider lt  item gt       lt item name  android dividerHeight  gt 1dp lt  item gt   lt  style gt    Finally declare your list view using the custom style    lt ListView      style   style dividedListStyle       android layout width  wrap content       android layout height  wrap content       android id    id cashItemsList  gt   lt  ListView gt    I m assuming you know how to use these snippets  if not let me know  Basically the answer to your question is that you can t set the divider thickness in the drawable  you have to leave the width undefined there and use android dividerHeight to set it instead

User · Answer

Some people might be experiencing a solid line  I got around this by adding android layerType  software  to the view referencing the drawable

User · Answer

This is a workaround  but works for me   Created res drawable divider xml as follows    lt  xml version  1 0  encoding  UTF-8   gt   lt shape   xmlns android  http   schemas android com apk res android  gt       lt gradient android startColor   ffcdcdcd  android endColor   ffcdcdcd  android angle  270 0    gt   lt  shape gt    And in styles xml for listview item  I added the following lines        lt item name  android divider  gt  drawable divider lt  item gt       lt item name  android dividerHeight  gt 1px lt  item gt    Crucial part was to include this 1px setting  Of course  drawable uses gradient  with 1px  and that s not the optimal solution  I tried using stroke but didn t get it to work   You don t seem to use styles  so just add android dividerHeight  1px  attribute for the ListView

User · Answer

Your  drawable list divide should look like this    lt shape  xmlns android  http   schemas android com apk res android   android shape  line  gt    lt stroke    android height  1dp     android color   8F8F8F     android dashWidth  1dp     android dashGap  1dp    gt   lt  shape gt    In your version you provide an android width  1dp   simply change it to an android height  1dp  and it should work

[android] Android ListView Divider

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