将Glide Library与Fragment适配器一起使用 [英] Using Glide Library with a Fragment adapter

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本文介绍了将Glide Library与Fragment适配器一起使用的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我有一个适配器类，该适配器类用于用cardviews填充recyclerview项目.此RecyclerView位于片段下.在此适配器内部，我试图将图像绑定到cardview布局下的imageview.我正在尝试通过适配器类中的以下方法来实现该目标:

I have an adapter class that is being used to populate the recyclerview item with cardviews. This RecyclerView is located under a fragment. Inside this adapter, I am trying to bind an image to a imageview which is under the cardview layout. I am trying to achieve that under the following method which is in the adapter class:

public void onBindViewHolder(@NonNull ProductViewHolder holder, int position) {
    Product product = myProducts.get(position);
    holder.productTitle.setText(product.getProductName());
    holder.productDesc.setText(product.getDescription());
    Uri uri = Uri.parse(product.getImageUri());
    Glide.with(/*WHAT SHOULD I PASS HERE??*/).load(new File(uri.getPath())).into(holder.productImage);
}

每个产品实例都有一个包含图像路径的字段，我想采用该路径，找到对应的图像并将其绘制在cardview项中.但是我不知道我应该传递给Glide.with()作为参数.在此先感谢，并指出任何错误.我是android编程的新手.

Each product instance has a field which contains path to an image and I want to take that path, find corresponding image and draw it in the cardview item. But I have no idea what should I pass to Glide.with() as an argument. Thanks in advance and please point out anything seems wrong. I am very novice in android programming.

以下是持有人类别.

class ProductViewHolder extends RecyclerView.ViewHolder {

    private ImageView productImage;
    private TextView productTitle;
    private TextView productDesc;

    public ProductViewHolder(View itemView) {
        super(itemView);
        productImage = itemView.findViewById(R.id.product_image);
        productTitle = itemView.findViewById(R.id.product_title);
        productDesc = itemView.findViewById(R.id.product_desc);
    }

}

我已经尝试过了

Glide.with(holder.itemView).load(new File(uri.getPath())).into(holder.productImage);

但是它给出了这样的错误:

But it gave an error like this:

class com.bumptech.glide.load.engine.GlideException: Failed to load resource
There were 3 causes:
java.io.IOException(File unsuitable for memory mapping)
java.io.FileNotFoundException(/document/msf:24: open failed: ENOENT (No such file or directory))
java.io.FileNotFoundException(open failed: ENOENT (No such file or directory))

这是我的适配器类:

 public class ProductAdapter extends RecyclerView.Adapter<ProductAdapter.ProductViewHolder> {

    private final LayoutInflater myInflater;
    private List<Product> myProducts = new ArrayList<>();
    private Context context;

    public ProductAdapter(Context context) {
        this.context = context;
        myInflater = LayoutInflater.from(context);
    }

    @NonNull
    @Override
    public ProductViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View itemView = myInflater.inflate(R.layout.card_view_product, parent, false);
        return new ProductViewHolder(itemView);
    }

    @Override
    public void onBindViewHolder(@NonNull ProductViewHolder holder, int position) {
        Product product = myProducts.get(position);
        holder.productTitle.setText(product.getProductName());
        holder.productDesc.setText(product.getDescription());
        Uri uri = Uri.parse(product.getImageUri());
        Glide.with(context).load(new File(uri.getPath())).into(holder.productImage);
    }

    @Override
    public int getItemCount() {
        return myProducts.size();
    }

    public void setProducts(List<Product> products) {
        myProducts = products;
        notifyDataSetChanged();
    }

    class ProductViewHolder extends RecyclerView.ViewHolder {

        private ImageView productImage;
        private TextView productTitle;
        private TextView productDesc;

        public ProductViewHolder(View itemView) {
            super(itemView);
            productImage = itemView.findViewById(R.id.product_image);
            productTitle = itemView.findViewById(R.id.product_title);
            productDesc = itemView.findViewById(R.id.product_desc);
        }

    }
}

错误

    W/Glide: Load failed for /document/msf:25 with size [384x384]
    class com.bumptech.glide.load.engine.GlideException: Failed to load resource
    There were 3 causes:
    java.io.IOException(File unsuitable for memory mapping)
    java.io.FileNotFoundException(/document/msf:25: open failed: ENOENT (No such file or directory))
    java.io.FileNotFoundException(open failed: ENOENT (No such file or directory))
     call GlideException#logRootCauses(String) for more detail
      Cause (1 of 3): class com.bumptech.glide.load.engine.GlideException: Fetching data failed, class java.nio.ByteBuffer, LOCAL
    There was 1 cause:
    java.io.IOException(File unsuitable for memory mapping)
     call GlideException#logRootCauses(String) for more detail
        Cause (1 of 1): class java.io.IOException: File unsuitable for memory mapping
      Cause (2 of 3): class com.bumptech.glide.load.engine.GlideException: Fetching data failed, class java.io.InputStream, LOCAL
    There was 1 cause:
    java.io.FileNotFoundException(/document/msf:25: open failed: ENOENT (No such file or directory))
     call GlideException#logRootCauses(String) for more detail
        Cause (1 of 1): class java.io.FileNotFoundException: /document/msf:25: open failed: ENOENT (No such file or directory)
      Cause (3 of 3): class com.bumptech.glide.load.engine.GlideException: Fetching data failed, class android.os.ParcelFileDescriptor, LOCAL
    There was 1 cause:
    java.io.FileNotFoundException(open failed: ENOENT (No such file or directory))
     call GlideException#logRootCauses(String) for more detail
        Cause (1 of 1): class java.io.FileNotFoundException: open failed: ENOENT (No such file or directory)
I/Glide: Root cause (1 of 3)
    java.io.IOException: File unsuitable for memory mapping
        at com.bumptech.glide.util.ByteBufferUtil.fromFile(ByteBufferUtil.java:38)
        at com.bumptech.glide.load.model.ByteBufferFileLoader$ByteBufferFetcher.loadData(ByteBufferFileLoader.java:61)
        at com.bumptech.glide.load.engine.SourceGenerator.startNextLoad(SourceGenerator.java:70)
        at com.bumptech.glide.load.engine.SourceGenerator.startNext(SourceGenerator.java:63)
        at com.bumptech.glide.load.engine.DecodeJob.runGenerators(DecodeJob.java:310)
        at com.bumptech.glide.load.engine.DecodeJob.runWrapped(DecodeJob.java:279)
        at com.bumptech.glide.load.engine.DecodeJob.run(DecodeJob.java:234)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
        at java.lang.Thread.run(Thread.java:919)
        at com.bumptech.glide.load.engine.executor.GlideExecutor$DefaultThreadFactory$1.run(GlideExecutor.java:393)
I/Glide: Root cause (2 of 3)
    java.io.FileNotFoundException: /document/msf:25: open failed: ENOENT (No such file or directory)
        at libcore.io.IoBridge.open(IoBridge.java:496)
        at java.io.FileInputStream.<init>(FileInputStream.java:159)
        at com.bumptech.glide.load.model.FileLoader$StreamFactory$1.open(FileLoader.java:142)
        at com.bumptech.glide.load.model.FileLoader$StreamFactory$1.open(FileLoader.java:139)
        at com.bumptech.glide.load.model.FileLoader$FileFetcher.loadData(FileLoader.java:71)
        at com.bumptech.glide.load.engine.SourceGenerator.startNextLoad(SourceGenerator.java:70)
        at com.bumptech.glide.load.engine.SourceGenerator.startNext(SourceGenerator.java:63)
        at com.bumptech.glide.load.engine.DecodeJob.runGenerators(DecodeJob.java:310)
        at com.bumptech.glide.load.engine.DecodeJob.onDataFetcherFailed(DecodeJob.java:408)
        at com.bumptech.glide.load.engine.SourceGenerator.onLoadFailedInternal(SourceGenerator.java:160)
        at com.bumptech.glide.load.engine.SourceGenerator$1.onLoadFailed(SourceGenerator.java:83)
        at com.bumptech.glide.load.model.ByteBufferFileLoader$ByteBufferFetcher.loadData(ByteBufferFileLoader.java:66)
        at com.bumptech.glide.load.engine.SourceGenerator.startNextLoad(SourceGenerator.java:70)
        at com.bumptech.glide.load.engine.SourceGenerator.startNext(SourceGenerator.java:63)
        at com.bumptech.glide.load.engine.DecodeJob.runGenerators(DecodeJob.java:310)
        at com.bumptech.glide.load.engine.DecodeJob.runWrapped(DecodeJob.java:279)
        at com.bumptech.glide.load.engine.DecodeJob.run(DecodeJob.java:234)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
        at java.lang.Thread.run(Thread.java:919)
        at com.bumptech.glide.load.engine.executor.GlideExecutor$DefaultThreadFactory$1.run(GlideExecutor.java:393)
     Caused by: android.system.ErrnoException: open failed: ENOENT (No such file or directory)
        at libcore.io.Linux.open(Native Method)
        at libcore.io.ForwardingOs.open(ForwardingOs.java:167)
        at libcore.io.BlockGuardOs.open(BlockGuardOs.java:252)
        at libcore.io.ForwardingOs.open(ForwardingOs.java:167)
        at android.app.ActivityThread$AndroidOs.open(ActivityThread.java:7255)
        at libcore.io.IoBridge.open(IoBridge.java:482)
        at java.io.FileInputStream.<init>(FileInputStream.java:159) 
        at com.bumptech.glide.load.model.FileLoader$StreamFactory$1.open(FileLoader.java:142) 
        at com.bumptech.glide.load.model.FileLoader$StreamFactory$1.open(FileLoader.java:139) 
        at com.bumptech.glide.load.model.FileLoader$FileFetcher.loadData(FileLoader.java:71) 
        at com.bumptech.glide.load.engine.SourceGenerator.startNextLoad(SourceGenerator.java:70) 
        at com.bumptech.glide.load.engine.SourceGenerator.startNext(SourceGenerator.java:63) 
        at com.bumptech.glide.load.engine.DecodeJob.runGenerators(DecodeJob.java:310) 
        at com.bumptech.glide.load.engine.DecodeJob.onDataFetcherFailed(DecodeJob.java:408) 
        at com.bumptech.glide.load.engine.SourceGenerator.onLoadFailedInternal(SourceGenerator.java:160) 
        at com.bumptech.glide.load.engine.SourceGenerator$1.onLoadFailed(SourceGenerator.java:83) 
        at com.bumptech.glide.load.model.ByteBufferFileLoader$ByteBufferFetcher.loadData(ByteBufferFileLoader.java:66) 
        at com.bumptech.glide.load.engine.SourceGenerator.startNextLoad(SourceGenerator.java:70) 
        at com.bumptech.glide.load.engine.SourceGenerator.startNext(SourceGenerator.java:63) 
        at com.bumptech.glide.load.engine.DecodeJob.runGenerators(DecodeJob.java:310) 
        at com.bumptech.glide.load.engine.DecodeJob.runWrapped(DecodeJob.java:279) 
        at com.bumptech.glide.load.engine.DecodeJob.run(DecodeJob.java:234) 
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167) 
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641) 
        at java.lang.Thread.run(Thread.java:919) 
        at com.bumptech.glide.load.engine.executor.GlideExecutor$DefaultThreadFactory$1.run(GlideExecutor.java:393) 
I/Glide: Root cause (3 of 3)
    java.io.FileNotFoundException: open failed: ENOENT (No such file or directory)
        at android.os.ParcelFileDescriptor.openInternal(ParcelFileDescriptor.java:315)
        at android.os.ParcelFileDescriptor.open(ParcelFileDescriptor.java:220)
        at com.bumptech.glide.load.model.FileLoader$FileDescriptorFactory$1.open(FileLoader.java:166)
        at com.bumptech.glide.load.model.FileLoader$FileDescriptorFactory$1.open(FileLoader.java:163)
        at com.bumptech.glide.load.model.FileLoader$FileFetcher.loadData(FileLoader.java:71)
        at com.bumptech.glide.load.engine.SourceGenerator.startNextLoad(SourceGenerator.java:70)
        at com.bumptech.glide.load.engine.SourceGenerator.startNext(SourceGenerator.java:63)
        at com.bumptech.glide.load.engine.DecodeJob.runGenerators(DecodeJob.java:310)
        at com.bumptech.glide.load.engine.DecodeJob.onDataFetcherFailed(DecodeJob.java:408)
        at com.bumptech.glide.load.engine.SourceGenerator.onLoadFailedInternal(SourceGenerator.java:160)
        at com.bumptech.glide.load.engine.SourceGenerator$1.onLoadFailed(SourceGenerator.java:83)
        at com.bumptech.glide.load.model.FileLoader$FileFetcher.loadData(FileLoader.java:76)
        at com.bumptech.glide.load.engine.SourceGenerator.startNextLoad(SourceGenerator.java:70)
        at com.bumptech.glide.load.engine.SourceGenerator.startNext(SourceGenerator.java:63)
        at com.bumptech.glide.load.engine.DecodeJob.runGenerators(DecodeJob.java:310)
        at com.bumptech.glide.load.engine.DecodeJob.onDataFetcherFailed(DecodeJob.java:408)
        at com.bumptech.glide.load.engine.SourceGenerator.onLoadFailedInternal(SourceGenerator.java:160)
        at com.bumptech.glide.load.engine.SourceGenerator$1.onLoadFailed(SourceGenerator.java:83)
        at com.bumptech.glide.load.model.ByteBufferFileLoader$ByteBufferFetcher.loadData(ByteBufferFileLoader.java:66)
        at com.bumptech.glide.load.engine.SourceGenerator.startNextLoad(SourceGenerator.java:70)
        at com.bumptech.glide.load.engine.SourceGenerator.startNext(SourceGenerator.java:63)
        at com.bumptech.glide.load.engine.DecodeJob.runGenerators(DecodeJob.java:310)
        at com.bumptech.glide.load.engine.DecodeJob.runWrapped(DecodeJob.java:279)
        at com.bumptech.glide.load.engine.DecodeJob.run(DecodeJob.java:234)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
        at java.lang.Thread.run(Thread.java:919)
        at com.bumptech.glide.load.engine.executor.GlideExecutor$DefaultThreadFactory$1.run(GlideExecutor.java:393)

我调试代码以查看图像路径是否成功返回，并且确实返回.但是它没有显示在列表项中.我认为加法过程中没有错.

I debug the code to see does the path of an image returns successfully and it does. But it is not showing up in the list item. I think there is nothing wrong in the part where addition process happens.

推荐答案

，您需要传递活动/片段的上下文，其中包含with()中的图像视图.

you need to pass the context of your activity/fragment which contains the image view in the with().

您可以通过在适配器构造函数中传递活动的上下文来实现. 例如，您的Adapter构造器可能看起来像这样:

you can achieve this by passing the context of your activity in your adapter constructor. for example, your Adapter constructor might look like that:

myAdapter(Context context, List<Object> dataset) {
            this.context = context;
            ...
            ...
               }

，当您从适配器创建实例时，可以像这样传递上下文:

and when you create an instance from the adapter you can pass the context like this:

myAdapter adapter = new MyAdapter(this,...);

然后您可以像这样使用Glide的上下文:

then you can use the context for Glide like this: 

Glide.with(context)

我希望这会有所帮助，如果您需要更多说明，请在评论中告诉我！

I hope this helps, if you need more clarifications, let me know in the comments!

这篇关于将Glide Library与Fragment适配器一起使用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

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