Android帧动画笔记

创建drawable资源文件，选择animation-list
<?xml version="1.0" encoding="utf-8"?>
<animation-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item
        android:drawable="@drawable/progress_1"
        android:duration="200"/>
    <item
        android:drawable="@drawable/progress_2"
        android:duration="200"/>
    <item
        android:drawable="@drawable/progress_3"
        android:duration="200"/>
    <item
        android:drawable="@drawable/progress_4"
        android:duration="200"/>
    <item
        android:drawable="@drawable/progress_5"
        android:duration="200"/>
    <item
        android:drawable="@drawable/progress_6"
        android:duration="200"/>
    <item
        android:drawable="@drawable/progress_7"
        android:duration="200"/>
    <item
        android:drawable="@drawable/progress_8"
        android:duration="200"/>

</animation-list>

在布局文件中引用：

<ImageView
    android:id="@+id/iv_progress"
    android:src="@drawable/progress_anim"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"/>

编写代码：

public class ProgressAnimDemo extends AppCompatActivity {
    private ImageView iv_progress;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_progressanimdemo);
        iv_progress = (ImageView) findViewById(R.id.iv_progress);
        //获取AnimationDrawable对象，xml如果是通过background设置drawable则通过getDrwaable()，如果是src则通过getDrawable
        AnimationDrawable anim = (AnimationDrawable)iv_progress.getDrawable();
        anim.start();//启动帧动画
    }
}
效果：