Java android中的条形码

我有以下代码，对我来说很好：

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);

我想在这里用一些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;
            }
        }

{
@凌驾
public boolean onload失败（@Nullable glide，对象模型，目标，boolean isFirstResource）{
progressBar.setVisibility（View.GONE）；
返回false；
}
@凌驾
公共布尔onResourceReady（可绘制资源、对象模型、目标、数据源数据源、布尔isFirstResource）{
progressBar.setVisibility（View.GONE）；
返回false；
}
}

您拥有的是一个匿名类。它和其他变量一样是可赋值的，所以把它拉出来并赋值给一个变量

 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;
        }
    };

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 

---

谢谢你。

 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;
        }
    };

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

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

    // Add constructor 

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