Android ImageView Animation

Question

I ve created a layout with an image view and a web view  The web view is set to have a default visibility of gone  When the activity fires up it displays the image view first and when the web view has finished loading its url  it marks itself as visible and the imageview is marked as hidden   When the imageview is shown  I would like it to rotate repeatedly just for a little added pizazz    I have never done animations before in Android and all the posts I found when I asked the internet were not helpful  thus  I have returned to SO for help    So if I start with this         final ImageView splash    ImageView findViewById R id splash     How do I create a repeated rotate animation and apply it to the ImageView   Thanks again

User · Accepted Answer

Use a RotateAnimation  setting the pivot point to the centre of your image   RotateAnimation anim   new RotateAnimation 0f  350f  15f  15f   anim setInterpolator new LinearInterpolator     anim setRepeatCount Animation INFINITE   anim setDuration 700       Start animating the image final ImageView splash    ImageView  findViewById R id splash   splash startAnimation anim       Later   stop the animation splash setAnimation null

User · Answer

How to rotate an image around its center   ImageView view         Initialize ImageView via FindViewById or programatically  RotateAnimation anim   new RotateAnimation 0 0f  360 0f  Animation RELATIVE TO SELF  0 5f  Animation RELATIVE TO SELF  0 5f      Setup anim with desired properties anim setInterpolator new LinearInterpolator     anim setRepeatCount Animation INFINITE     Repeat animation indefinitely anim setDuration 700     Put desired duration per anim cycle here  in milliseconds    Start animation view startAnimation anim      Later on  use view setAnimation null  to stop it    This will cause the image to rotate around its center  0 5 or 50  of its width height   I am posting this for future readers who get here from Google  as I have  and who wish to rotate the image around its center without defining said center in absolute pixels

User · Answer

You can also simply use the Rotate animation feature  That runs a specific animation  for a pre-determined amount of time  on an ImageView   Animation rotate   AnimationUtils loadAnimation  context   R anim rotate picture   splash startAnimation rotate     Then create an animation XML file in your res anim called rotate picture with the content    lt  xml version  1 0  encoding  utf-8   gt   lt set xmlns android  http   schemas android com apk res android       android shareInterpolator  false  gt        lt rotate      android fromDegrees  0      android toDegrees  360      android duration  5000      android pivotX  50       android pivotY  50   gt   lt  rotate gt   lt  set gt    Now unfortunately  this will only run it once  You ll need a loop somewhere to make it repeat the animation while it s waiting  I experimented a little bit and got my program stuck in infinite loops  so I m not sure of the best way to that  EDIT  Christopher s answer provides the info on how to make it loop properly  so removing my bad suggestion about separate threads

User · Answer

Verified Code   imageView setImageResource R drawable ic arrow up    boolean up   true   if   up         up   true       imageView startAnimation animate up       else        up   false       imageView startAnimation animate up        private Animation animate boolean up        Animation anim   AnimationUtils loadAnimation this  up   R anim rotate up   R anim rotate down       anim setInterpolator new LinearInterpolator        for smooth animation     return anim      drawable ic arrow up xml   lt vector xmlns android  http   schemas android com apk res android          android width  24dp          android height  24dp          android viewportWidth  24 0          android viewportHeight  24 0  gt       lt path         android fillColor   3d3d3d          android pathData  M7 41 15 41L12 10 83l4 59 4 58L18 14l-6 -6 -6 6z   gt   lt  vector gt    anim rotate up xml   lt  xml version  1 0  encoding  utf-8   gt   lt set xmlns android  http   schemas android com apk res android      android fillAfter  true      android fillEnabled  true  gt       lt rotate         android duration  200          android fromDegrees  -180          android pivotX  50           android pivotY  50           android toDegrees  0    gt   lt  set gt    anim rotate down xml   lt  xml version  1 0  encoding  utf-8   gt   lt set xmlns android  http   schemas android com apk res android      android fillAfter  true      android fillEnabled  true  gt       lt rotate         android duration  200          android fromDegrees  0          android pivotX  50           android pivotY  50           android toDegrees  180    gt   lt  set gt

User · Answer

imgDics    ImageView  v findViewById R id img player tab2 dics       imgDics setOnClickListener onPlayer2Click       anim   new RotateAnimation 0f  360f              Animation RELATIVE TO SELF  0 5f  Animation RELATIVE TO SELF                              0 5f       anim setInterpolator new LinearInterpolator         anim setRepeatCount Animation INFINITE       anim setDuration 4000           Start animating the image     imgDics startAnimation anim

User · Answer

I have found out  that if you use the  getWidth 2 etc    that it won t work you need to get the number of pixels the image is and divide it by 2 yourself and then just type in the number for the last 2 arguments   so say your image was a 120 pixel by 120 pixel square  ur x and y would equal 60 pixels  so in your code  you would right   RotateAnimation anim   new RotateAnimation 0f  350f  60f  60f   anim setInterpolator new LinearInterpolator     anim setRepeatCount Animation INFINITE   anim setDuration 700     and now your image will pivot round its center

User · Answer

One way - split you image into N rotating it slightly every time  I d say 5 is enough  then create something like this in drawable   lt animation-list   android id    id handimation  android oneshot  false       xmlns android  http   schemas android com apk res android  gt       lt item android drawable   drawable progress1  android duration  150    gt       lt item android drawable   drawable progress2  android duration  150    gt       lt item android drawable   drawable progress3  android duration  150    gt    lt  animation-list gt     code start  progress setVisibility View VISIBLE   AnimationDrawable frameAnimation    AnimationDrawable progress getDrawable    frameAnimation setCallback progress   frameAnimation setVisible true  true     code stop   AnimationDrawable frameAnimation    AnimationDrawable progress getDrawable    frameAnimation stop    frameAnimation setCallback null   frameAnimation   null  progress setVisibility View GONE     more here

User · Answer

Inside the  element put   android repeatCount  infinite

User · Answer

Don t hard code image bounds  Just use   RotateAnimation anim   new RotateAnimation  fromAngle  toAngle  imageView getDrawable   getBounds   width   2  imageView getDrawable   getBounds   height   2

[android] Android ImageView Animation

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