本文介绍了Android ImageView连续放大和缩小的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
有什么方法可以在Android中连续放大和缩小 ImageView
。我尝试使用下面的代码,但是只有一个Zoom功能起作用。
Is there any way to Zoom-in and Zoom-out an ImageView
continuously in Android. I tried using the below code, but only one of the Zoom function is working.
zoomin.xml
zoomin.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:fillAfter="true" >
<scale
xmlns:android="http://schemas.android.com/apk/res/android"
android:duration="20000"
android:fromXScale="1"
android:fromYScale="1"
android:pivotX="50%"
android:pivotY="50%"
android:toXScale="3"
android:toYScale="3" >
</scale>
</set>
zoomout.xml
zoomout.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:fillAfter="true" >
<scale
xmlns:android="http://schemas.android.com/apk/res/android"
android:duration="20000"
android:fromXScale="1.0"
android:fromYScale="1.0"
android:pivotX="50%"
android:pivotY="50%"
android:toXScale="0.5"
android:toYScale="0.5" >
</scale>
</set>
还有我已经完成的 Activity
类:
Animation zoomin, zoomout; //declared as public
@Override
public void onCreate(Bundle savedInstanceState) {
// animation
zoomin = AnimationUtils.loadAnimation(this, R.anim.zoomin);
zoomout = AnimationUtils.loadAnimation(this, R.anim.zoomout);
bgImage.setAnimation(zoomin);
bgImage.setAnimation(zoomout);
Thread t = new Thread(new Zoom());
t.start();
}
private class Zoom implements Runnable {
@Override
public void run() {
while (true) {
bgImage.startAnimation(zoomin);
try {
Thread.sleep(8000);
} catch (InterruptedException e) {
e.printStackTrace();
}
bgImage.startAnimation(zoomout);
}
}
}
此处 zoomin
动画似乎运行良好。有什么方法可以连续实现 zoomin
和 zoomout
动画吗?
Here the zoomin
animation seems to be working fine. Is there any way to implement the zoomin
and zoomout
animation continuously???
谢谢
推荐答案
使用此方法代替线程
zoomin.setAnimationListener(new AnimationListener() {
@Override
public void onAnimationStart(Animation arg0) {
// TODO Auto-generated method stub
}
@Override
public void onAnimationRepeat(Animation arg0) {
// TODO Auto-generated method stub
}
@Override
public void onAnimationEnd(Animation arg0) {
bgImage.startAnimation(zoomout);
}
});
和
zoomout.setAnimationListener(new AnimationListener() {
@Override
public void onAnimationStart(Animation arg0) {
// TODO Auto-generated method stub
}
@Override
public void onAnimationRepeat(Animation arg0) {
// TODO Auto-generated method stub
}
@Override
public void onAnimationEnd(Animation arg0) {
bgImage.startAnimation(zoomin);
}
});
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