SkAndroidCodec::NewFromStream returned null解决方案

android 7的系统上BitmapFactory.decodeStream函数第二次调用的时候会报错SkAndroidCodec::NewFromStream returned null，这是因为Android 7.0对BitmapFactory修改了BitmapFactory代码。

解决方法就是在两次decodeStream之间reset一下InputStream，增加如下的代码。

    try {
        is.reset();
    } catch (IOException e) {
        return null;
    }

 于是，读取bitmap代码如下

private Bitmap getImage(String imagename) {
    // Log.dd(logger, "AsyncImageLoader: " + ORDNER_IMAGES + imagename);

    AssetManager asset = context.getAssets();
    InputStream is = null;
    try {
        is = asset.open(ORDNER_IMAGES + imagename);
    } catch (IOException e) {
        // Log.de(logger, "image konnte nicht gelesen werden: " + ORDNER_IMAGES + imagename);
        return null;
    }


    // First decode with inJustDecodeBounds=true to check dimensions
    final BitmapFactory.Options options = new BitmapFactory.Options();
    options.inJustDecodeBounds = true;
    BitmapFactory.decodeStream(is, null, options);
 
try {
    is.reset();
} catch (IOException e) {

}
    // Calculate inSampleSize    options.inSampleSize = calculateInSampleSize(options, PW, PH);    // Decode bitmap with inSampleSize set    options.inJustDecodeBounds = false;    // Lesen des Bitmaps in der optimierten Groesse    return BitmapFactory.decodeStream(is, null, options);}

来源：

https://stackoverflow.com/questions/39316069/bitmapfactory-decodestream-from-assets-returns-null-on-android-7

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