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 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);

        }
    });

 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);

        }
    });

这篇关于Android ImageView连续放大和缩小的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

07-13 01:37