初学Android,图形图像之使用逐帧动画(三十四)

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逐帧动画其实跟动画片的原理是一样的，一段时间内连续播放一组图片，使之看起来像在动一样

下面是一个例子，不用专门说明就可以理解了

定义文件的资源名为girl,放在res->anmi目录下,下面有一个重要的参数 "

class="language-html">class="tags" href="/tags/ANDROID.html" title=android>android:oneshot="false"

如果为true，动画将不会循环播放

class="language-html"><?xml version="1.0" class="tags" href="/tags/ENCODING.html" title=encoding>encoding="utf-8"?>
<animation-list xmlns:class="tags" href="/tags/ANDROID.html" title=android>android="http://schemas.class="tags" href="/tags/ANDROID.html" title=android>android.com/apk/res/class="tags" href="/tags/ANDROID.html" title=android>android"
    class="tags" href="/tags/ANDROID.html" title=android>android:oneshot="false">
    <item class="tags" href="/tags/ANDROID.html" title=android>android:drawable="@drawable/one" class="tags" href="/tags/ANDROID.html" title=android>android:duration = "60" />
    <item class="tags" href="/tags/ANDROID.html" title=android>android:drawable="@drawable/two" class="tags" href="/tags/ANDROID.html" title=android>android:duration = "60" />
    <item class="tags" href="/tags/ANDROID.html" title=android>android:drawable="@drawable/three" class="tags" href="/tags/ANDROID.html" title=android>android:duration = "60" />
    <item class="tags" href="/tags/ANDROID.html" title=android>android:drawable="@drawable/four" class="tags" href="/tags/ANDROID.html" title=android>android:duration = "60" />
    <item class="tags" href="/tags/ANDROID.html" title=android>android:drawable="@drawable/five" class="tags" href="/tags/ANDROID.html" title=android>android:duration = "60" />
    <item class="tags" href="/tags/ANDROID.html" title=android>android:drawable="@drawable/six" class="tags" href="/tags/ANDROID.html" title=android>android:duration = "60" />
</animation-list>

主界面main中，imageveiw组件对动画资源进行引用

class="language-html"><?xml version="1.0" class="tags" href="/tags/ENCODING.html" title=encoding>encoding="utf-8" ?> 
<LinearLayout xmlns:class="tags" href="/tags/ANDROID.html" title=android>android="http://schemas.class="tags" href="/tags/ANDROID.html" title=android>android.com/apk/res/class="tags" href="/tags/ANDROID.html" title=android>android" class="tags" href="/tags/ANDROID.html" title=android>android:orientation="vertical" class="tags" href="/tags/ANDROID.html" title=android>android:class="tags" href="/tags/LAYOUT.html" title=layout>layout_width="fill_parent" class="tags" href="/tags/ANDROID.html" title=android>android:class="tags" href="/tags/LAYOUT.html" title=layout>layout_height="fill_parent" class="tags" href="/tags/ANDROID.html" title=android>android:background="#fff">
- <LinearLayout xmlns:class="tags" href="/tags/ANDROID.html" title=android>android="http://schemas.class="tags" href="/tags/ANDROID.html" title=android>android.com/apk/res/class="tags" href="/tags/ANDROID.html" title=android>android" class="tags" href="/tags/ANDROID.html" title=android>android:orientation="horizontal" class="tags" href="/tags/ANDROID.html" title=android>android:class="tags" href="/tags/LAYOUT.html" title=layout>layout_width="fill_parent" class="tags" href="/tags/ANDROID.html" title=android>android:class="tags" href="/tags/LAYOUT.html" title=layout>layout_height="wrap_content" class="tags" href="/tags/ANDROID.html" title=android>android:gravity="center">
  <Button class="tags" href="/tags/ANDROID.html" title=android>android:id="@+id/play" class="tags" href="/tags/ANDROID.html" title=android>android:class="tags" href="/tags/LAYOUT.html" title=layout>layout_width="wrap_content" class="tags" href="/tags/ANDROID.html" title=android>android:class="tags" href="/tags/LAYOUT.html" title=layout>layout_height="wrap_content" class="tags" href="/tags/ANDROID.html" title=android>android:text="@string/play" /> 
  <Button class="tags" href="/tags/ANDROID.html" title=android>android:id="@+id/stop" class="tags" href="/tags/ANDROID.html" title=android>android:class="tags" href="/tags/LAYOUT.html" title=layout>layout_width="wrap_content" class="tags" href="/tags/ANDROID.html" title=android>android:class="tags" href="/tags/LAYOUT.html" title=layout>layout_height="wrap_content" class="tags" href="/tags/ANDROID.html" title=android>android:text="@string/stop" /> 
  </LinearLayout>
  <ImageView class="tags" href="/tags/ANDROID.html" title=android>android:id="@+id/anim" class="tags" href="/tags/ANDROID.html" title=android>android:class="tags" href="/tags/LAYOUT.html" title=layout>layout_width="wrap_content" class="tags" href="/tags/ANDROID.html" title=android>android:class="tags" href="/tags/LAYOUT.html" title=layout>layout_height="wrap_content" class="tags" href="/tags/ANDROID.html" title=android>android:background="@anim/girl" class="tags" href="/tags/ANDROID.html" title=android>android:scaleType="center" /> 
</LinearLayout>

主界面中两个按钮，一个用来播放动画，一个用来停止动画

class="language-java">package WangLi.Graphics.AnimationFrame;

import class="tags" href="/tags/ANDROID.html" title=android>android.app.Activity;
import class="tags" href="/tags/ANDROID.html" title=android>android.graphics.drawable.AnimationDrawable;
import class="tags" href="/tags/ANDROID.html" title=android>android.os.Bundle;
import class="tags" href="/tags/ANDROID.html" title=android>android.view.View;
import class="tags" href="/tags/ANDROID.html" title=android>android.view.View.OnClickListener;
import class="tags" href="/tags/ANDROID.html" title=android>android.widget.Button;
import class="tags" href="/tags/ANDROID.html" title=android>android.widget.ImageView;

public class AnimationFrame extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.class="tags" href="/tags/LAYOUT.html" title=layout>layout.main);
        //获取两个按钮
        Button play = (Button)findViewById(R.id.play);
        Button stop = (Button)findViewById(R.id.stop);
        ImageView imageView = (ImageView)findViewById(R.id.anim);
        //获取AnimationDrawable动画对象
        final AnimationDrawable anim = (AnimationDrawable)imageView.getBackground();
        play.setOnClickListener(new OnClickListener(){
        	public void onClick(View v)
        	{
        		anim.start();
        	}
        });
        stop.setOnClickListener(new OnClickListener(){
        	public void onClick(View v)
        	{
        		anim.stop();
        	}
        });
    }
}