一个能够有shimmer功能的帧动画自定义imageview

1.自定义继承imageview的view:

public class ShimmerFrameLayout extends AppCompatImageView {
    AnimationDrawable animationDrawable;
    Runnable runnable;
    int delayMillis;

public ShimmerFrameLayout(Context context) {
    super(context);
    init(context, null);
}

public ShimmerFrameLayout(Context context, AttributeSet attrs) {
    super(context, attrs);
    init(context, attrs);
}

public ShimmerFrameLayout(Context context, AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
    init(context, attrs);
}

private void init(Context context, @Nullable AttributeSet attrs) {
    setWillNotDraw(false);
    TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.shimmerStyle);
    if (typedArray != null) {
        delayMillis = typedArray.getInt(R.styleable.shimmerStyle_delayMillis, 1000);
    }
    Drawable drawable =  getDrawable();
    if (drawable != null && drawable instanceof AnimationDrawable) {
        animationDrawable = (AnimationDrawable) drawable;
        animationDrawable.start();
        runnable = new Runnable() {
            @Override
            public void run() {
                if (animationDrawable != null) {
                    animationDrawable.stop();
                    animationDrawable.start();
                    postDelayed(runnable, delayMillis);
                }

            }
        };
    }

}


@Override
public void onAttachedToWindow() {
    super.onAttachedToWindow();
    if (runnable != null) {
        postDelayed(runnable, delayMillis);

    }


}

@Override
public void onDetachedFromWindow() {
    super.onDetachedFromWindow();
    if (runnable != null) {
        removeCallbacks(runnable);

    }
}

}

2.自定义间隔属性

<declare-styleable name="kwShimmerStyle">
    <attr name="delayMillis" format="integer"/>
</declare-styleable>

3.removeallbacks

postDelayed方法和removeCallbacks方法的使用

方法postDelayed的作用是延迟多少毫秒后开始运行，而removeCallbacks方法是删除指定的Runnable对象，使线程对象停止运行。

使用方法：

   <cn.shimmer.ShimmerFrameLayout
        android:id="@+id/imvg_live_guard"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentEnd="true"
        android:layout_alignParentRight="true"
        android:layout_below="@+id/iv_live_recorded"
        android:layout_marginEnd="11dp"
        app:delayMillis= "5000"
        android:src="@drawable/play_gif"
        android:layout_marginRight="11dp"
        android:layout_marginTop="10dip"/>

play_gif ：

<?xml version="1.0" encoding="UTF-8"?>
<animation-list android:oneshot="true"
    xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:duration="55" android:drawable="@drawable/gif_0"
        />
    <item android:duration="55" android:drawable="@drawable/gif_1"
        />
    <item android:duration="55" android:drawable="@drawable/gif_2"
        />
</animation-list>