如何不根据大小正确地将下载的图像显示到警报对话框中？

Question

我想做的是展示一些我从 url 下载的图片。我设法下载并显示了图像，但我不知道如何根据尺寸正确显示，尺寸是指高度和宽度，而不是 kb。

我正在使用 volley 下载图片。在片段视图中单击后会显示警报对话框。

这是布局

    <android.support.constraint.ConstraintLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

    <LinearLayout
        android:id="@+id/linearLayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:padding="10dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">
        <ImageView
            android:id="@+id/imgProduct"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:scaleType="centerCrop"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent" />
    </LinearLayout>
</android.support.constraint.ConstraintLayout>

这就是我显示警报对话框的方式

    LayoutInflater layoutInflater = (LayoutInflater)getActivity().getBaseContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View imageDialog = layoutInflater.inflate(R.layout.popup_product_image, null);
    Dialog dialog = new Dialog(context);
    dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
    dialog.setContentView(imageDialog);
    dialog.setCanceledOnTouchOutside(true);
    //dialog.getWindow().setBackgroundDrawable(new ColorDrawable(android.graphics.Color.TRANSPARENT));

    ImageView imgImage = imageDialog.findViewById(R.id.imgProduct);

    String url = product.urlImage.replaceAll("\s+","");

    ImageRequest imgRequest = new ImageRequest(url, new Response.Listener<Bitmap>() {
        @Override
        public void onResponse(Bitmap response) {
            imgImage.setImageBitmap(response);
            imgImage.startAnimation(AnimationUtils.loadAnimation(context, android.R.anim.fade_in));
        }
    }, 0, 0, ImageView.ScaleType.CENTER_CROP, Bitmap.Config.ARGB_8888, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            imgImage.setImageResource(RES_ERROR);
            Toast.makeText(context, VolleyManager.getInstance(context)
                    .checkError(error), Toast.LENGTH_LONG).show();
        }
    });
    imgRequest.setTag(CANCELABLE_REQUEST_TAG);
    VolleyManager.getInstance(context).getRequestQ().add(imgRequest);

    // Set your image

    dialog.show();
    dialog.getWindow().setLayout(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);

任何帮助或建议都将非常有用，谢谢

Answer 1

如上评论，使用Piccaso。试试这个并从 "ImageView imgImage = imageDialog.findViewById(R.id.imgProduct);"

修改

Target target = new Target() {
            @Override
            public void onBitmapLoaded(Bitmap bitmap, Picasso.LoadedFrom from) {
                imgImage.setImageBitmap(bitmap);
                doFoo();
            }

        @Override
        public void onBitmapFailed(Drawable errorDrawable) {
            imgImage.setImageDrawable(errorDrawable);
            Toast.makeText(context, "download failed", Toast.LENGTH_SHORT).show();
            doBar();
        }

        @Override
        public void onPrepareLoad(Drawable placeHolderDrawable) {
            imgImage.setImageDrawable(placeHolderDrawable);
        }
    };

    //this will help us to avoid the Target being gc'd
    imgImage.setTag(target);

    Picasso.with(context)
            .load(url)
            .placeholder(RES_PLACEHOLDER)
            .error(RES_ERROR)
            .resize(400, 400)
            .into(target);

    // Set your image

    dialog.show();
    dialog.getWindow().setLayout(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);

然后使用虚拟函数

private void doFoo() {
    //dummy
}
private void doBar() {
    //dummy
}

如何不根据大小正确地将下载的图像显示到警报对话框中？

How to display downloaded image into alert dialog correctly not based on the size?

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android-volley