Android-WhatsApp：贴纸不显示

Question

为了构建一个贴纸应用程序，我遵循以下指南：https://github.com/whatsapp/stickers/tree/master/Android

一切都很好（包括将贴纸添加到whatsapp)，除了一件事：包细节视图(sticker_pack_details.xml)中没有显示webp贴纸。

我正在像这样更改贴纸文件的加载位置

StickerPreviewAdapter.java

public void onBindViewHolder(@NonNull final StickerPreviewViewHolder stickerPreviewViewHolder, final int i)}
{
    stickerPreviewViewHolder.stickerPreviewView.setImageResource(errorResource);
    //stickerPreviewViewHolder.stickerPreviewView.setImageURI(StickerPackLoader.getStickerAssetUri(stickerPack.identifier, stickerPack.getStickers().get(i).imageFileName));

    String filename = "/data/user/0/com.example.samplestickerapp/files/" + stickerPack.identifier + "/" + stickerPack.getStickers().get(i).imageFileName;
    android.net.Uri stickerURI = android.net.Uri.parse(filename);
    stickerPreviewViewHolder.stickerPreviewView.setImageURI(stickerURI);
}

*如这里所述:https://github.com/whatsapp/stickers/blob/master/android/readme.md#expose-files-that-are-internal-as-stickers-trans-contentprovider

Answer 1

我让它工作了！！

所有的功劳都归功于梅基姆：他对自己答案的评论为我指明了正确的方向

public void onBindViewHolder(@NonNull final StickerPreviewViewHolder stickerPreviewViewHolder, final int i)}
{
    stickerPreviewViewHolder.stickerPreviewView.setImageResource(errorResource);
    //stickerPreviewViewHolder.stickerPreviewView.setImageURI(StickerPackLoader.getStickerAssetUri(stickerPack.identifier, stickerPack.getStickers().get(i).imageFileName));

    String filename = "/data/user/0/com.example.samplestickerapp/files/" + stickerPack.identifier + "/" + stickerPack.getStickers().get(i).imageFileName;

    //Instead of this:
    //android.net.Uri stickerURI = android.net.Uri.parse(filename);

    //I had to do this:
    java.io.File file = new java.io.File(filename);
    android.net.Uri stickerURI = android.net.Uri.fromFile(file);

    stickerPreviewViewHolder.stickerPreviewView.setImageURI(stickerURI);
}