java - 缩短android中的进度条代码

Question

我有以下代码，它对我来说效果很好:

final ProgressBar progressBar = findViewById(R.id.progress);
progressBar.getIndeterminateDrawable().setColorFilter(Color.GREEN, 
PorterDuff.Mode.SRC_IN);

GlideApp.with(this)
        .load(url)
        .listener(new RequestListener<Drawable>() {
            @Override
            public boolean onLoadFailed(@Nullable GlideException e, Object model, Target<Drawable> target, boolean isFirstResource) {
                progressBar.setVisibility(View.GONE);
                return false;
            }

            @Override
            public boolean onResourceReady(Drawable resource, Object model, Target<Drawable> target, DataSource dataSource, boolean isFirstResource) {
                progressBar.setVisibility(View.GONE);
                return false;
            }
        })
        .into(imageView);

但是我有很多图像，因此我需要替换监听器内的代码。

GlideApp.with(this)
        .load(url)
        .listener(new RequestListener<Drawable>() { SOMETHING HERE
        })
        .into(imageView);

或者如果您也可以通过以下方式:

GlideApp.with(this)
        .load(url)
        .listener(SOMETHING HERE)
        .into(imageView);

我想用这里的东西替换所有这些代码，这些东西可以是变量或其他东西。

{
            @Override
            public boolean onLoadFailed(@Nullable GlideException e, Object model, Target<Drawable> target, boolean isFirstResource) {
                progressBar.setVisibility(View.GONE);
                return false;
            }

            @Override
            public boolean onResourceReady(Drawable resource, Object model, Target<Drawable> target, DataSource dataSource, boolean isFirstResource) {
                progressBar.setVisibility(View.GONE);
                return false;
            }
        }

Answer 1

你拥有的是一个匿名类。它像任何其他变量一样可以分配，因此将其取出并将其分配给一个

 RequestListener<Drawable> listener =  new RequestListener<>() {
        @Override
        public boolean onLoadFailed(@Nullable GlideException e, Object model, Target<Drawable> target, boolean isFirstResource) {
            progressBar.setVisibility(View.GONE);
            return false;
        }

        @Override
        public boolean onResourceReady(Drawable resource, Object model, Target<Drawable> target, DataSource dataSource, boolean isFirstResource) {
            progressBar.setVisibility(View.GONE);
            return false;
        }
    };

然后就可以使用了

GlideApp.with(this)
    .load(url)
    .listener(listener)
    .into(imageView);

您还可以定义一个完全独立的类

public class DrawableListener implements RequestListener<Drawable> {
    private final ProgressBar progressBar;

    // Add constructor 

然后类似

GlideApp.with(this)
    .load(url)
    .listener(new DrawableListener(progressBar))
    .into(imageView);