如何从Firebase存储中设置图像视图? [英] How to set image view from Firebase storage?

问题描述

我从文档和在线帮助中都尝试了所有示例，但是我无法获得存储中要显示在图像视图上的简单图像.

I tried all examples both from the docs and from online help, but I can't get a simple image I have in the storage to display on an image view.

假设我的图片存储在名为picture的文件夹中，因此photo1.jpg存储在引用中:

assuming I have pictures in the storage in a folder called pictures so photo1.jpg is stored in the reference:

StorageReference storageReference = FirebaseStorage.getInstance().getReference();
StorageReference photoReference= storageReference.child("pictures/photo1.jpg");

但是如何设置它，并将其内容替换为我通过id找到的现有图像视图:

But how do I set it and replace the contents with an existing image view that I find by id:

ImageView photoView= (ImageView) findViewById(R.id.photo_view);

在获取Uri的监听器上，我一直失败:

I keep getting failure on the listener to get Uri:

storageReference.getDownloadUrl().addOnSuccessListener(new OnSuccessListener<Uri>() {
    @Override
    public void onSuccess(Uri uri) {
        profileImage.setImageURI(uri);
        Log.d("Test"," Success!");
    }
}).addOnFailureListener(new OnFailureListener() {
    @Override
    public void onFailure(@NonNull Exception exception) {
        Log.d("Test"," Failed!");
    }
});

推荐答案

使用以下代码可以在ImageView上设置图像:

Using below code you can set image on ImageView:

StorageReference storageReference = FirebaseStorage.getInstance().getReference();
StorageReference photoReference= storageReference.child("pictures/photo1.jpg");

                final long ONE_MEGABYTE = 1024 * 1024;
                photoReference.getBytes(ONE_MEGABYTE).addOnSuccessListener(new OnSuccessListener<byte[]>() {
                    @Override
                    public void onSuccess(byte[] bytes) {
                        Bitmap bmp = BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
                        imageView.setImageBitmap(bmp);

                    }
                }).addOnFailureListener(new OnFailureListener() {
                    @Override
                    public void onFailure(@NonNull Exception exception) {
                        Toast.makeText(getApplicationContext(), "No Such file or Path found!!", Toast.LENGTH_LONG).show();
                    }
                });

您也可以使用Uri，因为您需要将字节数组保存到文件中.将以下代码用于同一代码:

You can use the Uri as well, for that you need to save the byte array to a file. Use below code for the same:

File f = new File(Environment.getExternalStorageDirectory()
                        + File.separator + "test.jpg");
f.createNewFile();
//write the bytes in file
FileOutputStream fo = new FileOutputStream(f);
fo.write(bytes.toByteArray());

// remember close de FileOutput
fo.close();

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