How can I dynamically set the position of view in Android

Question

How can I change the position of view through code  Like changing its X  Y position  Is it possible

User · Answer

I would recommend using  setTranslationX and  setTranslationY  I m only just getting started on this myself  but these seem to be the safest and preferred way of moving a view  I guess it depends a lot on what exactly you re trying to do  but this is working well for me for 2D animation

User · Answer

Yes  you can dynamically set the position of the view in Android  Likewise  you have an ImageView in LinearLayout of your XML file  So you can set its position through LayoutParams But make sure to take LayoutParams according to the layout taken in your XML file  There are different LayoutParams according to the layout taken  Here is the code to set      LayoutParams layoutParams new LayoutParams int width  int height       layoutParams setMargins int left  int top  int right  int bottom       imageView setLayoutParams layoutParams

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One thing to keep in mind with positioning is that each view has an index relative to its parent view  So if you have a linear layout with three subviews  the subviews will each have an index  0  1  2 in the above case   This allows you to add a view to the last position  or the end  in a parent view by doing something like this   int childCount   parent getChildCount    parentView addView newView  childCount     Alternatively you could replace a view using something like the following   int childIndex   parentView indexOfChild childView   childView setVisibility View GONE    parentView addView newView  childIndex

User · Answer

There are different valid answers already  but none seems to properly suggest which method s  to use in which case  except for the corresponding API level restrictions    If you can wait for a layout cycle and the parent view group supports MarginLayoutParams  or a subclass   set marginLeft   marginTop accordingly  If you need to change the position immediately and persistently  e g  for a PopupMenu anchor   additionally call layout l  t  r  b  with the same coordinates  This preempts what the layout system will confirm later  For immediate  temporary  changes  such as animations   use setX     setY   instead  In cases where the parent size doesn t depend on WRAP CHILDREN  it might be fine to use setX     setY   exclusively  Never use setLeft     setRight     setBottom     setTop    see below    Background  The mLeft   mTop   mBottom   mRight fields get filled from the corresponding LayoutParams in layout    Layout is called implicitly and asynchronously by the Android view layout system  Thus  setting the MarginLayoutParams seems to be the safest and cleanest way to set the position permanently  However  the asynchronous layout lag might be a problem in some cases  e g  when using a View to render a cursor  and it s supposed to be re-positioned and serve as a PopupMenu anchor at the same time  In this case  calling layout   worked fine for me    The problems with setLeft   and setTop   are    Calling them alone is not sufficient -- you also need to call setRight   and setBottom   to avoid stretching or shrinking the view  The implementation of these methods looks relatively complex    doing some work to account for the view size changes caused by each of them  They seem to cause strange issues with input fields  EditText soft numeric keyboard sometimes does not allow digits   setX   and setY   work outside of the layout system  and the corresponding values are treated as an additional offset to the left   top   bottom   right values determined by the layout system  shifting the view accordingly  They seem to have been added for animations  where an immediate effect without going through a layout cycle is required

User · Answer

I found that  Stefan Haustein comes very close to my experience  but not sure 100   My suggestion is    setLeft     setRight     setBottom     setTop   won t work sometimes  If you want to set a position temporarily  e g for doing animation  not affected a hierachy  when the view was added and shown  just use setX    setY   instead   You might want search more in difference setLeft   and setX    And note that X  Y seem to be absolute  and it was supported by AbsoluteLayout which now is deprecated  Thus  you feel X  Y is likely not supported any more  And yes  it is  but only partly  It means if your view is added  setX    setY   will work perfectly  otherwise  when you try to add a view into view group layout  e g FrameLayout  LinearLayout  RelativeLayout   you must set its LayoutParams with marginLeft  marginTop instead  setX    setY   in this case won t work sometimes   Set position of the view by marginLeft and marginTop is an unsynchronized process  So it needs a bit time to update hierarchy  If you use the view straight away after set margin for it  you might get a wrong value

User · Answer

You can try to use the following methods  if you re using HoneyComb Sdk API Level 11    view setX float x     Parameter x is the visual x position of this view   view setY float y     Parameter y is the visual y position of this view   I hope it will be helpful to you

User · Answer

For support to all API levels you can use it like this   ViewPropertyAnimator animate view  translationYBy -yourY  translationXBy -yourX  setDuration 0

User · Answer

For anything below Honeycomb  API Level 11  you ll have to use setLayoutParams         If you can limit your support to Honeycomb and up you can use the setX       setY       setLeft       setTop       etc

User · Answer

Use LayoutParams  If you are using a LinearLayout you have to import android widget LinearLayout LayoutParams  else import the proper version of LayoutParams for the layout you re using  or it will cause a ClassCastException  then   LayoutParams layoutParams   new LayoutParams int width  int height   layoutParams setMargins int left  int top  int right  int bottom   imageView setLayoutParams layoutParams     NB  Note that you can use also imageView setLeft int dim   BUT THIS WON T set the position of the component  it will set only the position of the left border of the component  the rest will remain at the same position

User · Answer

There is a library called NineOldAndroids  which allows you to use the Honeycomb animation library all the way down to version one   This means you can define left  right  translationX Y with a slightly different interface   Here is how it works   ViewHelper setTranslationX view  50f     You just use the static methods from the ViewHelper class  pass the view and which ever value you want to set it to

User · Answer

Use RelativeLayout  place your view in it  get RelativeLayout LayoutParams object from your view and set margins as you need  Then call requestLayout   on your view  This is the only way I know

User · Answer

Set the left position of this view relative to its parent   view setLeft int leftPosition     Set the right position of this view relative to its parent   view setRight int rightPosition     Set the top position of this view relative to its parent   view setTop int topPosition     Set the bottom position of this view relative to its parent   view setBottom int bottomPositon     The above methods are used to set the position the view related to its parent

[android] How can I dynamically set the position of view in Android?

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