Android使用Glide加载Gif慢 获取gif时间

1,解决Glide加载Gif非常慢问题

Glide.with(MainActivity.this).load(url).asGif().diskCacheStrategy(DiskCacheStrategy.SOURCE).into(imageView);  

为其添加缓存策略,其中缓存策略可以为:Source及None,None及为不缓存,Source缓存原型.如果为ALL和Result就不行

2,加载第一贞：

Glide.with(context).load(gifUrl).asBitmap().into(imageViewGifAsBitmap);

3,控制动画次数：

Glide.with(this).load(getResource()).diskCacheStrategy(DiskCacheStrategy.SOURCE).into(new GlideDrawableImageViewTarget(imageView, 1));

4，GIF 时间：

                        Glide.with(FirstActivity.this)
                                .load(file)
                                .asGif()
                                .fitCenter()
                                .diskCacheStrategy(DiskCacheStrategy.SOURCE)
                                .listener(new RequestListener<File, GifDrawable>() {
                                    @Override
                                    public boolean onException(Exception e, File model, Target<GifDrawable> target, boolean isFirstResource) {
                                    
                                        return false;
                                    }

                                    @Override
                                    public boolean onResourceReady(final GifDrawable resource, File model, Target<GifDrawable> target, boolean isFromMemoryCache, boolean isFirstResource) {
                                        new Thread(new Runnable() {
                                            @Override
                                            public void run() {
                                                int duration = 0;
                                                try {
                                                    GifDrawable gifDrawable = (GifDrawable) resource;
                                                    GifDecoder decoder = gifDrawable.getDecoder();
                                                    for (int i = 0; i < gifDrawable.getFrameCount(); i++) {
                                                        duration += decoder.getDelay(i);
                                                    }

                                                    mGifAdTime = duration;
                                                } catch (Throwable e) {
                                                }
                                            }
                                        }).start();

                                        return false;
                                    }
                                })
                                .into(mAdImg);

 4.+ Glide版本获取gif时间

Glide.with(FirstActivity.this)
        .asGif()
        .load(file)
        .fitCenter()
        .diskCacheStrategy(DiskCacheStrategy.DATA)
        .listener(new RequestListener<GifDrawable>() {
            @Override
            public boolean onLoadFailed(@Nullable GlideException e, Object model, Target<GifDrawable> target, boolean isFirstResource) {
                return false;
            }

            @Override
            public boolean onResourceReady(final GifDrawable resource, Object model, Target<GifDrawable> target, DataSource dataSource, boolean isFirstResource) {
                new Thread(new Runnable() {
                    @Override
                    public void run() {
                        // 计算动画时长
                        int duration = 0;
                        try {
                            GifDrawable gifDrawable = (GifDrawable) resource;
                            //设置循环播放次数为1次
                            gifDrawable.setLoopCount(1);
                            //GifDecoder decoder = gifDrawable.getDecoder();//4.0开始没有这个方法了
                            Drawable.ConstantState state = gifDrawable.getConstantState();
                            if (state != null) {
                                //不能混淆GifFrameLoader和GifState类
                                Object gifFrameLoader = GlideGifUtil.getValue(state, "frameLoader");
                                if (gifFrameLoader != null) {
                                    Object decoder = GlideGifUtil.getValue(gifFrameLoader, "gifDecoder");
                                    if (decoder != null && decoder instanceof GifDecoder) {
                                        for (int i = 0; i < gifDrawable.getFrameCount(); i++) {
                                            duration += ((GifDecoder) decoder).getDelay(i);
                                        }
                                    }
                                }
                            }
                        } catch (Throwable e) {
                        }
                    }
                }).start();
                return false;
            }
        })
        .into(mAdImg);

public class GlideGifUtil {
    /**
     * 通过字段名从对象或对象的父类中得到字段的值
     *
     * @param object    对象实例
     * @param fieldName 字段名
     * @return 字段对应的值
     * @throws Exception
     */
    public static Object getValue(Object object, String fieldName) throws Exception {
        if (object == null) {
            return null;
        }
        if (TextUtils.isEmpty(fieldName)) {
            return null;
        }
        Field field = null;
        Class<?> clazz = object.getClass();
        for (; clazz != Object.class; clazz = clazz.getSuperclass()) {
            try {
                field = clazz.getDeclaredField(fieldName);
                field.setAccessible(true);
                return field.get(object);
            } catch (Exception e) {
                //这里甚么都不要做！并且这里的异常必须这样写，不能抛出去。
                //如果这里的异常打印或者往外抛，则就不会执行clazz = clazz.getSuperclass(),最后就不会进入到父类中了
            }
        }
        return null;
    }
}

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