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.
<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
>
<View
android:layout_width="50px"
android:layout_height="fill_parent"
android:id="@+id/viewContainer"
android:background:"#00f00"
/>
</LinearLayout>
ScaleAnimation scaleAnim = new ScaleAnimation(...);
view before and after animation .Thanks
The answer is
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();
}
}
}
});
}
In XML, this what I use for achieving the same result. May be this is more intuitive.
scale_up.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" >
<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" />
</set>
scale_down.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" >
<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" />
</set>
See the animation on the X axis is from 1.0 -> 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 -> 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);
Add this code on values anim
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<scale
android:duration="@android:integer/config_longAnimTime"
android:fromXScale="0.2"
android:fromYScale="0.2"
android:toXScale="1.0"
android:toYScale="1.0"
android:pivotX="50%"
android:pivotY="50%"/>
<alpha
android:fromAlpha="0.1"
android:toAlpha="1.0"
android:duration="@android:integer/config_longAnimTime"
android:interpolator="@android:anim/accelerate_decelerate_interpolator"/>
</set>
call on styles.xml
<style name="DialogScale">
<item name="android:windowEnterAnimation">@anim/scale_in</item>
<item name="android:windowExitAnimation">@anim/scale_out</item>
</style>
In Java code: set Onclick
public void onClick(View v) {
fab_onclick(R.style.DialogScale, "Scale" ,(Activity) context,getWindow().getDecorView().getRootView());
// Dialogs.fab_onclick(R.style.DialogScale, "Scale");
}
setup on method:
alertDialog.getWindow().getAttributes().windowAnimations = type;
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);
}
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
}
});
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);
Source: Stackoverflow.com