Animation的简单讲解（1）

首先看API文档   http://developer.android.com/guide/topics/resources/animation-resource.html 

file location:

res/anim/filename.xml

文档上说  文件建在res/anim/下。

resource reference:

In Java: R.anim.filename
In XML: @[package:]anim/filename

在java中R.anim.filename引用   在XML中加上包名引用

下面我们就来试试动画。

文档中有一个列子

example:

XML file saved at res/anim/hyperspace_jump.xml:

<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:shareInterpolator="false">
    <scale
        android:interpolator="@android:anim/accelerate_decelerate_interpolator"
        android:fromXScale="1.0"
        android:toXScale="1.4"
        android:fromYScale="1.0"
        android:toYScale="0.6"
        android:pivotX="50%"
        android:pivotY="50%"
        android:fillAfter="false"
        android:duration="700" />
    <set
        android:interpolator="@android:anim/accelerate_interpolator"
        android:startOffset="700">
        <scale
            android:fromXScale="1.4"
            android:toXScale="0.0"
            android:fromYScale="0.6"
            android:toYScale="0.0"
            android:pivotX="50%"
            android:pivotY="50%"
            android:duration="400" />
        <rotate
            android:fromDegrees="0"
            android:toDegrees="-45"
            android:toYScale="0.0"
            android:pivotX="50%"
            android:pivotY="50%"
            android:duration="400" />
    </set>
</set>

This application code will apply the animation to an ImageView andstart the animation:

ImageView image = (ImageView) findViewById(R.id.image); Animation hyperspaceJump = AnimationUtils.loadAnimation(this, R.anim.hyperspace_jump); image.startAnimation(hyperspaceJump);

文档上已经告诉你怎么调用动画了 。。下面我就来试试。

public class MainActivity extends Activity  {
    ImageView mTrackingText;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
       setContentView(R.layout.main);
       ImageView image = (ImageView) findViewById(R.id.tracking);
       Animation hyperspaceJump = AnimationUtils.loadAnimation(this, R.anim.hyperspace_jump);
       image.startAnimation(hyperspaceJump);
    }

 
}