Android 如何以编程方式为 ImageView 设置动画
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How to programmatically animate an ImageView
提问by Jeremy
I am trying to animate an ImageView when the said image view is clicked.
当单击所述图像视图时，我试图为 ImageView 设置动画。
Specifically I want the size of the ImageView gets bigger (say .20 bigger) and the immediately shrink back to its original size).
具体来说，我希望 ImageView 的大小变大（比如 0.20 大）并立即收缩回其原始大小）。
So far I have been experimenting with this code with no luck.
到目前为止，我一直在试验这段代码，但没有运气。
// thumbLike is the imageView I would like to animate.
button.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
ScaleAnimation scaleAnim = new ScaleAnimation(1.0f, 2.5f, 1.0f, 2.5f,
Animation.RELATIVE_TO_SELF, 0.5f,
Animation.RELATIVE_TO_SELF, 0.5f);
scaleAnim.setInterpolator(new LinearInterpolator());
scaleAnim.setDuration(1500);
thumbLike.startAnimation(scaleAnim);
thumbLike.setAnimation(null);
}
});
Can anyone suggest me with a possible solution?
谁能建议我一个可能的解决方案？
Edit #1
编辑 #1
It is working through XML as answered by Hardik4560:
正如 Hardik4560 所回答的，它通过 XML 工作：
// finally i use this code to execute the animation
Animation animationScaleUp = AnimationUtils.loadAnimation(this, R.anim.scale_up);
Animation animationScaleDown = AnimationUtils.loadAnimation(this, R.anim.scale_down);
AnimationSet growShrink = new AnimationSet(true);
growShrink.addAnimation(animationScaleUp);
growShrink.addAnimation(animationScaleDown);
thumbLike.startAnimation(growShrink);
and the XML
和 XML
SCALE_UP
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:interpolator="@android:anim/linear_interpolator">
<scale
android:fromXScale="1.0"
android:toXScale="1.5"
android:fromYScale="1.0"
android:toYScale="1.5"
android:pivotX="50%"
android:pivotY="50%"
android:duration="1000" />
</set>
SCALE_DOWN
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:interpolator="@android:anim/linear_interpolator">
<scale
android:fromXScale="1.5"
android:toXScale="1.0"
android:fromYScale="1.5"
android:toYScale="1.0"
android:pivotX="50%"
android:pivotY="50%"
android:duration="1000" />
</set>
ps: this is awkward, since I already accepted an answer. I am trying to combine between @tharkbad and @Hardik4560 's answers yet now the way it animates does not look smooth.
ps：这很尴尬，因为我已经接受了答案。我正在尝试将 @tharkbad 和 @Hardik4560 的答案结合起来，但现在它的动画方式看起来并不流畅。
during the scale_up animation, it kinda look like being "skip" to the end of animation and then immediately starting scale_down animation. I guess I have to play around with it a bit.
在 scale_up 动画期间，它有点像“跳过”到动画的结尾，然后立即开始 scale_down 动画。我想我必须玩弄一下。
采纳答案by Hardik4560
I use this to achieve popin popout effect,
我用这个来实现popin弹出效果，
See if its of any use to you
看看对你有没有用
Pop Out.
弹出。
<?xml version="1.0" encoding="utf-8"?>
<set
xmlns:android="http://schemas.android.com/apk/res/android"
android:interpolator="@android:anim/bounce_interpolator" >
<scale
android:pivotX="50%"
android:pivotY="50%"
android:fromXScale="0.5"
android:fromYScale="0.5"
android:toXScale="1.0"
android:toYScale="1.0"
android:duration="500" />
</set>
Pop In
流行音乐
<?xml version="1.0" encoding="utf-8"?>
<set
xmlns:android="http://schemas.android.com/apk/res/android"
android:interpolator="@android:anim/bounce_interpolator" >
<scale
android:pivotX="50%"
android:pivotY="50%"
android:fromXScale="1.0"
android:fromYScale="1.0"
android:toXScale="0.0"
android:toYScale="0.0"
android:duration="500" />
</set>
回答by Thrakbad
If you want to implement this without XML you could do so as follows
如果你想在没有 XML 的情况下实现这一点，你可以这样做
final float growTo = 1.2f;
final long duration = 1200;
ScaleAnimation grow = new ScaleAnimation(1, growTo, 1, growTo,
Animation.RELATIVE_TO_SELF, 0.5f,
Animation.RELATIVE_TO_SELF, 0.5f);
grow.setDuration(duration / 2);
ScaleAnimation shrink = new ScaleAnimation(growTo, 1, growTo, 1,
Animation.RELATIVE_TO_SELF, 0.5f,
Animation.RELATIVE_TO_SELF, 0.5f);
shrink.setDuration(duration / 2);
shrink.setStartOffset(duration / 2);
AnimationSet growAndShrink = new AnimationSet(true);
growAndShrink.setInterpolator(new LinearInterpolator());
growAndShrink.addAnimation(grow);
growAndShrink.addAnimation(shrink);
thumbLike.startAnimation(growAndShrink);
Of course, you could also use NineOldAndroidsand use the new animation methods.
当然，您也可以使用NineOldAndroids并使用新的动画方法。
I think your original error is this line, it removes the animation you just started from the view again.
我认为您的原始错误是这一行，它再次从视图中删除了您刚开始的动画。
thumbLike.setAnimation(null);
回答by David Hackro
I created the same animation using kotlin:
我使用 kotlin 创建了相同的动画：
Repo:https://github.com/David-Hackro/Bounce-Animation
回购：https : //github.com/David-Hackro/Bounce-Animation
You need create your element and extend of anything (ImageView,Button etc)
in my case y created a class named BounceWidget
在我的情况下，您需要创建元素并扩展任何内容（ImageView、Button 等） y 创建了一个名为的类 BounceWidget
Add element in xml
在xml中添加元素
<hackro.tutorials.com.bounceWidget.widget.BounceWidget
android:layout_width="match_parent"
android:layout_height="match_parent" />
Add element programmatically
以编程方式添加元素
val xpp = resources.getXml(R.xml.bouncewidget)
val attr = Xml.asAttributeSet(xpp)
val layout : LinearLayout = findViewById(R.id.layout)
val octocat1 : BounceWidget = BounceWidget(this,attr)
//you can change this values and have default values
//octocat1.id_resource(R.mipmap.bounceimage) // change image --> default : R.mipmap.ic_launcher
//octocat1.positionX = 1 //position X starting --> default : 0
//octocat1.positionY = 1 //position Y starting--> default : 0
//octocat1.velocityX = 1 //Velocity X --> default : 20
//octocat1.velocityY = 1 //Velocity Y --> default : 15
octocat1.layoutParams = LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT)
layout.addView(octocat1)
