How do I retrieve an image from Firebase Storage and show it? Getting "No content provider" error

Question

My app is saving images in Firebase Storage, but I'm having trouble retrieving and viewing them. Images are uploaded fine, into a folder called "images".

Each image is associated with a Box. The boxes collection in the database looks like this:

boxes > key1 > name: Box 1 name
             > uid: xxxxxxxxx          (user id of Box creator)
             > image: "images/box1image.jpg"
      > key2 > name: Box 2 name
             > uid: yyyyyyyyy          
             > image: "images/box2image.jpg"

I want to retrieve the image and show it in a DialogFragment. Currently the fragment layout (dialog_fragment_show_box) looks like this (I've taken out layout_width etc for brevity):

<android.support.constraint.ConstraintLayout >

    <ImageView
        android:id="@+id/iv_box_image" />

    <TextView
        android:id="@+id/tv_box_name"
        app:layout_constraintTop_toBottomOf="@id/iv_box_image" />

</android.support.constraint.ConstraintLayout>

现在，当DialogFragment加载时，我想传递Box，并显示其名称和关联的图像。 Box.java包含：

public class HybridBox {

    private String  name, uid, key, url;


    // CONSTRUCTOR
    public HybridBox() {}

    // GETTERS
    public String   getName()         { return name; }
    public String   getUrl()          { return url; }
    public String   getUid()          { return this.uid; }
    public String   getKey()          { return key; }

    // SETTERS
    public void setName(String thisName) { this.name = thisName; }
    public void setUrl(String thisUrl)   { this.url = thisUrl; }
    public void setUid(String thisUid)   { this.uid = thisUid; }
    public void setKey(String thisKey)   { this.key = thisKey; }

}

在Box从没有问题数据库中检索，并传递到DialogFragment，这是：

public class DialogFragmentShowBox extends DialogFragment {

    private Context         mContext;
    private EditText        mBoxName;
    private ImageView       mBoxImage;
    private HybridBox       mBox;

    public DialogFragmentShowBox() {}

    public static DialogFragmentShowBox newInstance() {
        return new DialogFragmentShowBox();
    }

    @Override
    public View onCreateView(
            @NonNull LayoutInflater inflater, 
            ViewGroup container, Bundle savedInstanceState) {

        return inflater.inflate(
                R.layout.dialog_fragment_show_box, container, false);

    }

    @Override
    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);

        mBoxImage        = view.findViewById(R.id.iv_box_image);
        mBoxName         = view.findViewById(R.id.tv_box_name);

        show_details();
        draw_iv();

    }

    // Pass in Box object
    public void setBox(HybridBox box) {

        mBox = box;

        show_details();
        draw_iv();

    }

    // Set up Context
    public void setContext(Context context) { mContext = context; }

    // Show details of the Box (currently just name)
    private void show_details() {

        if(mBox == null) return;

        if(mBoxName != null) {
            mBoxName(mBox.getName());
        }
    }

    // Draw the Box image
    private void draw_iv() {
        if(mBox == null) return;

        if(mBoxImage != null) {

            FirebaseStorage mStorage = FirebaseStorage.getInstance();
            final StorageReference mStorageRef = mStorage.getReference();

            final String drawableUrl = mBox.getUrl();

            if(drawableUrl != null) {
                mStorageRef.child(mBox.getUrl())
                           .getDownloadUrl()
                           .addOnSuccessListener(new OnSuccessListener<Uri>() {
                    @Override
                    public void onSuccess(Uri uri) {
                        // Got the download URL
                        ContentResolver res = mContext.getContentResolver();
                        try {
                            Bitmap bitmap
                                    = MediaStore.Images.Media.getBitmap(
                                    res,
                                    uri);
                            mBoxImage.setImageBitmap(bitmap);
                        }
                        catch (IOException e)
                        {
                            e.printStackTrace();
                        }
                    }
                });

            }
        }

    }
}

运行此命令时，收到以下警告，并且Box Image为空白：

W/System.err: java.io.FileNotFoundException: No content provider: https://firebasestorage.googleapis.com/v0/b/tickybox-d8888.appspot.com/o/images%2F561e1408-3b17-4eaa-b0ff-d3b00479d1c0.jpg?alt=media&token=9656ea28-2493-447b-aa30-9dbc4c39b3fc
W/System.err:     at android.content.ContentResolver.openTypedAssetFileDescriptor(ContentResolver.java:1396)
W/System.err:     at android.content.ContentResolver.openAssetFileDescriptor(ContentResolver.java:1247)
W/System.err:     at android.content.ContentResolver.openInputStream(ContentResolver.java:967)
        at android.provider.MediaStore$Images$Media.getBitmap(MediaStore.java:888)
        at sharongilmore.tickybox.fragments.dialogFragments.DialogFragmentShowBox$6.onSuccess(DialogFragmentShowBox.java:295)
W/System.err:     at sharongilmore.tickybox.fragments.dialogFragments.DialogFragmentShowBox$6.onSuccess(DialogFragmentShowBox.java:288)
        at com.google.android.gms.tasks.zzn.run(Unknown Source:4)
        at android.os.Handler.handleCallback(Handler.java:790)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:164)
W/System.err:     at android.app.ActivityThread.main(ActivityThread.java:6494)
W/System.err:     at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)

传递给成功侦听器的uri的形式为：

https://firebasestorage.googleapis.com/v0/b/tickybox-d8888.appspot.com/o/images%2F561e1408-3b17-4eaa-b0ff-d3b00479d1c0.jpg?alt=media&token=9656ea28-2493-447b-aa30-9dbc4c39b3fc

（我更改了一些要发布在此处的URL，但是当我在浏览器中访问它时，它会显示正确的图像，因此我认为可以）。

该ContentResolver res填充; 不知道是什么意思，但是在调试器的变量列表中，第一行是：

res = {ContextImpl$ApplicationContentResolver@8456}

任何想法出什么事了吗？

Answer 1

我的实现如下：

FirebaseStorage mStorage = FirebaseStorage.getInstance();
final StorageReference mStorageRef = mStorage.getReference();

mStorageRef.child(mBox.getUrl()).getDownloadUrl()
    .addOnSuccessListener(new OnSuccessListener<Uri>() {
         @Override
         public void onSuccess(Uri uri) {                           
             Glide.with(getContext()).load(uri).into(mBoxImage);
         }
    })
    .addOnFailureListener(new OnFailureListener() {
         @Override
         public void onFailure(@NonNull Exception exception) {
             // Handle any errors
         }
   });