Data Binding ImageView传图片地址

1.直接在ImageView上传入图片地址是不行的
2.用自已定义属性的方法再用glide的方法来传
3.正确的使用

1.直接在ImageView上传入图片地址是不行的

        <!--android:src="@{user.avatar}" 不能直接上图片地址-->
        <ImageView
            android:id="@+id/avatar"
            android:layout_width="@dimen/dp_40"
            android:layout_height="@dimen/dp_40"
            android:src="@{user.avatar}"
            tools:src="@mipmap/ic_launcher_round" />

2.用自已定义属性的方法再用glide的方法来传

PPImageView.java

public class PPImageView extends AppCompatImageView {
    public PPImageView(Context context) {
        super(context);
    }

    public PPImageView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public PPImageView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
//        ViewHelper.setViewOutline(this, attrs, defStyleAttr, 0);
    }


    public void setImageUrl(String imageUrl) {
        setImageUrl(this, imageUrl, false);
    }

    @BindingAdapter(value = {"image_url", "isCircle"})
    public static void setImageUrl(PPImageView view, String imageUrl, boolean isCircle) {
        view.setImageUrl(view, imageUrl, isCircle, 0);
    }

    @BindingAdapter(value = {"image_url", "isCircle", "radius"}, requireAll = false)
    public static void setImageUrl(PPImageView view, String imageUrl, boolean isCircle, int radius) {
        RequestBuilder<Drawable> builder = Glide.with(view).load(imageUrl);
        if (isCircle) {
            builder.transform(new CircleCrop());
        } else if (radius > 0) {
            builder.transform(new RoundedCornersTransformation(PixUtils.dp2px(radius), 0));
        }
        ViewGroup.LayoutParams layoutParams = view.getLayoutParams();
        if (layoutParams != null && layoutParams.width > 0 && layoutParams.height > 0) {
            builder.override(layoutParams.width, layoutParams.height);
        }
        builder.into(view);
    }


    public void bindData(int widthPx, int heightPx, int marginLeft, String imageUrl) {
        bindData(widthPx, heightPx, marginLeft, PixUtils.getScreenWidth(), PixUtils.getScreenWidth(), imageUrl);
    }

    public void bindData(int widthPx, int heightPx, final int marginLeft, final int maxWidth, final int maxHeight, String imageUrl) {
        if (TextUtils.isEmpty(imageUrl)) {
            setVisibility(GONE);
            return;
        } else {
            setVisibility(VISIBLE);
        }
        if (widthPx <= 0 || heightPx <= 0) {
            Glide.with(this).load(imageUrl).into(new SimpleTarget<Drawable>() {
                @Override
                public void onResourceReady(@NonNull Drawable resource, @Nullable Transition<? super Drawable> transition) {
                    int height = resource.getIntrinsicHeight();
                    int width = resource.getIntrinsicWidth();
                    setSize(width, height, marginLeft, maxWidth, maxHeight);

                    setImageDrawable(resource);
                }
            });
            return;
        }

        setSize(widthPx, heightPx, marginLeft, maxWidth, maxHeight);
        setImageUrl(this, imageUrl, false);
    }

    private void setSize(int width, int height, int marginLeft, int maxWidth, int maxHeight) {
        int finalWidth, finalHeight;
        if (width > height) {
            finalWidth = maxWidth;
            finalHeight = (int) (height / (width * 1.0f / finalWidth));
        } else {
            finalHeight = maxHeight;
            finalWidth = (int) (width / (height * 1.0f / finalHeight));
        }

        ViewGroup.LayoutParams params = getLayoutParams();
        params.width = finalWidth;
        params.height = finalHeight;
        if (params instanceof FrameLayout.LayoutParams) {
            ((FrameLayout.LayoutParams) params).leftMargin = height > width ? PixUtils.dp2px(marginLeft) : 0;
        } else if (params instanceof LinearLayout.LayoutParams) {
            ((LinearLayout.LayoutParams) params).leftMargin = height > width ? PixUtils.dp2px(marginLeft) : 0;
        }
        setLayoutParams(params);
    }

    @BindingAdapter(value = {"blur_url", "radius"})
    public static void setBlurImageUrl(final ImageView imageView, String blurUrl, int radius) {
        Glide.with(imageView).load(blurUrl).override(radius)
                .transform(new BlurTransformation())
                .dontAnimate()
                .into(new SimpleTarget<Drawable>() {
                    @Override
                    public void onResourceReady(@NonNull Drawable resource, @Nullable Transition<? super Drawable> transition) {
                        imageView.setBackground(resource);
                    }
                });
    }
}

PixUtils.java

public class PixUtils {

    public static int dp2px(int dpValue) {
        DisplayMetrics metrics = AppGlobals.getApplication().getResources().getDisplayMetrics();
        return (int) (metrics.density * dpValue + 0.5f);
    }

    public static int getScreenWidth() {
        DisplayMetrics metrics = AppGlobals.getApplication().getResources().getDisplayMetrics();
        return metrics.widthPixels;
    }

    public static int getScreenHeight() {
        DisplayMetrics metrics = AppGlobals.getApplication().getResources().getDisplayMetrics();
        return metrics.heightPixels;
    }
}

3.正确的使用

user.avatar为图片的网络地址

        <!--android:src="@{user.avatar}" 不能直接上图片地址-->
        <com.mooc.ppjoke.view.PPImageView
            android:id="@+id/avatar"
            android:layout_width="@dimen/dp_40"
            android:layout_height="@dimen/dp_40"
            app:image_url="@{user.avatar}"
            app:isCircle="@{true}"
            tools:src="@mipmap/ic_launcher_round" />