Android scale animation on view

Question

I want to use ScaleAnimation  programmatically not in xml  to change height to view from 0 to 60  of parent height  Width of view is constant  and is 50px  View is empty only background color is set   Can someone give me code for scaleAnim using ScaleAnimation from code    lt LinearLayout xmlns android  http   schemas android com apk res android      android orientation  vertical      android layout width  fill parent      android layout height  fill parent      android id    id layContainer      gt   lt View       android layout width  50px       android layout height  fill parent       android id    id viewContainer       android background   00f00        gt    lt  LinearLayout gt    ScaleAnimation scaleAnim   new ScaleAnimation           view before and after animation  Thanks

User · Answer

In XML  this what I use for achieving the same result  May be this is more intuitive   scale up xml   lt  xml version  1 0  encoding  utf-8   gt   lt set xmlns android  http   schemas android com apk res android   gt    lt scale     android duration  200      android fromXScale  1 0      android fromYScale  0 0      android pivotX  50       android pivotY  100       android toXScale  1 0      android toYScale  1 0    gt    lt  set gt    scale down xml   lt  xml version  1 0  encoding  utf-8   gt   lt set xmlns android  http   schemas android com apk res android   gt    lt scale     android duration  200      android fromXScale  1 0      android fromYScale  1 0      android pivotX  50       android pivotY  100       android toXScale  1 0      android toYScale  0 0    gt    lt  set gt    See the animation on the X axis is from 1 0 - gt  1 0 which means you don t have any scaling up in that direction and stays at the full width while  on the Y axis you get 0 0 - gt  1 0 scaling  as shown in the graphic in the question  Hope this helps someone   Some might want to know the java code as we see one requested   Place the animation files in anim folder and then load and set animation files something like   Animation scaleDown   AnimationUtils loadAnimation youContext  R anim scale down   ImagView v   findViewById R id your image view   v startAnimation scaleDown

User · Answer

Add this code on values anim  lt  xml version  quot 1 0 quot  encoding  quot utf-8 quot   gt   lt set xmlns android  quot http   schemas android com apk res android quot  gt        lt scale         android duration  quot  android integer config longAnimTime quot          android fromXScale  quot 0 2 quot          android fromYScale  quot 0 2 quot          android toXScale  quot 1 0 quot          android toYScale  quot 1 0 quot          android pivotX  quot 50  quot          android pivotY  quot 50  quot   gt       lt alpha         android fromAlpha  quot 0 1 quot          android toAlpha  quot 1 0 quot          android duration  quot  android integer config longAnimTime quot          android interpolator  quot  android anim accelerate decelerate interpolator quot   gt   lt  set gt   call on styles xml  lt style name  quot DialogScale quot  gt       lt item name  quot android windowEnterAnimation quot  gt  anim scale in lt  item gt       lt item name  quot android windowExitAnimation quot  gt  anim scale out lt  item gt   lt  style gt   In Java code  set Onclick public void onClick View v                fab onclick R style DialogScale   quot Scale quot    Activity  context getWindow   getDecorView   getRootView                   Dialogs fab onclick R style DialogScale   quot Scale quot                setup on method  alertDialog getWindow   getAttributes   windowAnimations   type

User · Answer

Use this method  No need to xml file   If you want scale to quarter half x half y   view animate   scaleX 0 5f  scaleY 0 5f    If you want scale and move to bottom right  view animate   scaleX 0 5f  scaleY 0 5f           translationY  view height 4  toFloat    translationX  view width 4  toFloat      If you want move to top use  -view height 4  and for left  -view width 4   If you want do something after animation ends use withEndAction Runnable runnable  function   You can use some other property like alpha and rotation   Full code  view animate          scaleX 0 5f  scaleY 0 5f   scale to quarter half x half y         translationY  view height 4  toFloat    translationX  view width 4  toFloat      move to bottom   right        alpha 0 5f     make it less visible        rotation 360f     one round turns        setDuration 1000     all take 1 seconds        withEndAction new Runnable                 Override            public void run                     animation ended

User · Answer

try this code to create Scale animation without using xml  ScaleAnimation animation   new ScaleAnimation fromXscale  toXscale  fromYscale  toYscale  Animation RELATIVE TO SELF  0 5f  Animation RELATIVE TO SELF  0 5f

User · Answer

Here is a code snip to do exactly that   public void scaleView View v  float startScale  float endScale        Animation anim   new ScaleAnimation              1f  1f     Start and end values for the X axis scaling             startScale  endScale     Start and end values for the Y axis scaling             Animation RELATIVE TO SELF  0f     Pivot point of X scaling             Animation RELATIVE TO SELF  1f      Pivot point of Y scaling     anim setFillAfter true      Needed to keep the result of the animation     anim setDuration 1000       v startAnimation anim       The ScaleAnimation constructor used here takes 8 args  4 related to handling the X-scale which we don t care about  1f  1f      Animation RELATIVE TO SELF  0f         The other 4 args are for the Y-scaling we do care about   startScale  endScale - In your case  you d use 0f  0 6f   Animation RELATIVE TO SELF  1f - This specifies where the shrinking of the view collapses to  referred to as the pivot in the documentation   Here  we set the float value to 1f because we want the animation to start growing the bar from the bottom  If we wanted it to grow downward from the top  we d use 0f   Finally  and equally important  is the call to anim setFillAfter true   If you want the result of the animation to stick around after the animation completes  you must run this on the animator before executing the animation   So in your case  you can do something like this   View v   findViewById R id viewContainer   scaleView v  0f   6f

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public void expand final View v            ScaleAnimation scaleAnimation   new ScaleAnimation 1  1  1  0  0  0           scaleAnimation setDuration 250           scaleAnimation setAnimationListener new Animation AnimationListener                  Override             public void onAnimationStart Animation animation                                 Override             public void onAnimationEnd Animation animation                    v setVisibility View INVISIBLE                               Override             public void onAnimationRepeat Animation animation                                       v startAnimation scaleAnimation              public void collapse final View v            ScaleAnimation scaleAnimation   new ScaleAnimation 1  1  0  1  0  0           scaleAnimation setDuration 250           scaleAnimation setAnimationListener new Animation AnimationListener                  Override             public void onAnimationStart Animation animation                                 Override             public void onAnimationEnd Animation animation                    v setVisibility View VISIBLE                               Override             public void onAnimationRepeat Animation animation                                       v startAnimation scaleAnimation

User · Answer

Resize using helper methods and start-repeat-end handlers like this   resize      view1      1 0f      0 0f      1 0f      0 0f      0 0f      0 0f      150      null      null      null      return null      Helper methods          Resize a view      public static void resize    View view    float fromX    float toX    float fromY    float toY    float pivotX    float pivotY    int duration       resize      view      fromX      toX      fromY      toY      pivotX      pivotY      duration      null      null      null             Resize a view with handlers         param view     A view to resize      param fromX    X scale at start      param toX      X scale at end      param fromY    Y scale at start      param toY      Y scale at end      param pivotX   Rotate angle at start      param pivotY   Rotate angle at end      param duration Animation duration      param start    Actions on animation start  Otherwise NULL      param repeat   Actions on animation repeat  Otherwise NULL      param end      Actions on animation end  Otherwise NULL      public static void resize    View view    float fromX    float toX    float fromY    float toY    float pivotX    float pivotY    int duration    Callable start    Callable repeat    Callable end       Animation animation     animation       new ScaleAnimation        fromX        toX        fromY        toY        Animation RELATIVE TO SELF        pivotX        Animation RELATIVE TO SELF        pivotY      animation setDuration      duration      animation setInterpolator      new AccelerateDecelerateInterpolator        animation setFillAfter true      view startAnimation      animation      animation setAnimationListener new AnimationListener           Override     public void onAnimationStart Animation animation           if  start    null            try              start call               catch  Exception e              e printStackTrace                                   Override     public void onAnimationEnd Animation animation           if  end    null            try              end call               catch  Exception e              e printStackTrace                                  Override     public void onAnimationRepeat        Animation animation           if  repeat    null            try              repeat call               catch  Exception e              e printStackTrace

[android] Android scale animation on view

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