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# ImageDecoderAdapter | ||
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--- | ||
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## 背景 | ||
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3.0我们在HippyEngine引擎初始化参数中增加了ImageDecoderAdapter的设置,如果有开发者业务中有使用到特殊格式的图片,如SharpP、avif等,可以通过设置ImageDecoderAdapter来对接你的自定义图片解码器,具体接口描述如下: | ||
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## 3.0 图片解码Adapter接口定义 | ||
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### ImageDecoderAdapter Public methods | ||
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```java | ||
boolean preDecode(@NonNull byte[] data, | ||
@Nullable Map<String, Object> initProps, | ||
@NonNull ImageDataHolder imageHolder, | ||
@NonNull BitmapFactory.Options options); | ||
``` | ||
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该接口在拉取到图片原始数据的时候会调用,解码的结果可以通过image data holder提供的setBitmap或者setDrawable接口设置到holder中,并且返回true,表示不需要sdk再做解码操作,如果返回false表示需要sdk做默认的解码操作。 | ||
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```java | ||
void afterDecode(@Nullable Map<String, Object> initProps, | ||
@NonNull ImageDataHolder imageHolder, | ||
@NonNull BitmapFactory.Options options); | ||
``` | ||
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该接口在解码结束后会调用,为开发者提供二次处理bitmap的机会, 比如要对bitmap做高斯模糊。 | ||
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```java | ||
void destroyIfNeeded(); | ||
``` | ||
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引擎退出销毁时调用,释放adapter可能占用的资源 |
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