recyclerView 不显示图像

Question

I am trying to show images in recyclerView but it doesn't display the bitmaps. I don't know what is wrong.

This is my adapter:

@Override
public void onBindViewHolder(@NonNull final ViewHolder holder, final int position) {
    final byte[] data = arrayList.get(position).getAsByteArray("byteArray");

    try {
        String tempImagePath = Environment.getExternalStorageDirectory().getPath() + "/AHOORATempImage";
        FileOutputStream fileOutputStream = new FileOutputStream(tempImagePath);
        fileOutputStream.write(data);
        fileOutputStream.flush();
        fileOutputStream.close();

        holder.image.setImageBitmap(BitmapFactory.decodeStream(new FileInputStream(tempImagePath)));

        new File(tempImagePath).delete();

    } catch (Exception e) {
        e.printStackTrace();
    }
}

and This is the xml of my item:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
xmlns:app="http://schemas.android.com/apk/res-auto">

<androidx.cardview.widget.CardView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    app:cardCornerRadius="3dp">
    <ImageView
        android:id="@+id/addContentGalleryImage"
        android:layout_width="300dp"
        android:layout_height="300dp"/>
</androidx.cardview.widget.CardView>

Thanks!

Answer 1

you can use Picasso library it's easy to use and very helpful with Url image especially. here's an example to use in onBindViewHolder

Picasso.get()
            //Image url or path
            .load(channelImgUrl.get(position))
            //This line optional if you want a circle Image shape
            .transform(new CropCircleTransformation())
            //Image View
            .into(holder.channelImg);