在毕加索中加载图像时如何使用进度条? [英] how to use progressbar when loading image in picasso?

问题描述

我希望onStart()方法使用毕加索从服务器加载图像，并且我想显示进度条，直到完全下载照片为止 这是我的代码:

I want onStart() method to load image from server using picasso and I want to show a progress bar until the photos are fully downloaded Here is my code:

@Override
    protected void onStart() {
        // TODO Auto-generated method stub
        super.onStart();

        Picasso.with(context).load(imageLoad)
                .placeholder(R.id.progressBarDetails)
                .error(R.drawable.friend_request).noFade().resize(200, 200)
                .into(avatarImage, new Callback() {
                    @Override
                    public void onError() {
                        // TODO Auto-generated method stub

                    }

                    @Override
                    public void onSuccess() {
                        // TODO Auto-generated method stub
                        progressbar.setVisibility(View.GONE);
                    }

                });

        Picasso.with(this).load(imageLoad).into(target);

    }

    OnFinished a = new OnFinished() {

        @Override
        public void onSendFinished(IntentSender IntentSender, Intent intent,
                int resultCode, String resultData, Bundle resultExtras) {
            // TODO Auto-generated method stub
            intent = new Intent(getApplicationContext(), Map.class);
        }
    };

    private Target target = new Target() {
        @Override
        public void onBitmapLoaded(final Bitmap bitmap, Picasso.LoadedFrom from) {
            new Thread(new Runnable() {
                @Override
                public void run() {
                    File file = new File(Environment
                            .getExternalStorageDirectory().getPath()
                            + "/actress_wallpaper.jpg");
                    try {
                        file.createNewFile();
                        FileOutputStream ostream = new FileOutputStream(file);
                        bitmap.compress(CompressFormat.JPEG, 75, ostream);
                        ostream.close();
                    } catch (Exception e) {
                        e.printStackTrace();
                    }

                }
            }).start();
        }

推荐答案

我还没有测试您的代码，但是即使可以工作，ImageView中也没有加载文件actress_wallpaper.jpg.在文档中，它说

I haven't tested your code but even if that works, the file actress_wallpaper.jpg isn't loaded in the ImageView. In the docs, it says

实现此类的对象必须具有Object.equals(Object)和Object.hashCode()的有效实现，才能在内部正确存储.

Objects implementing this class must have a working implementation of Object.equals(Object) and Object.hashCode() for proper storage internally.

尝试一下:

File file = new File(pathToFile);

Picasso.with(context)
       .load(file)
       .into(imageView, new Callback() {
           @Override
           public void onSuccess() {
               progressbar.setVisibility(View.GONE);
           }
       });

警告我还没有测试我的代码.

be warned I haven't tested my code.

更新:

我尝试过版本2.3.2和2.3.3，似乎有一个问题 https ://github.com/square/picasso/issues/539

I have tried version 2.3.2 and 2.3.3, it seems like that there's an issue https://github.com/square/picasso/issues/539

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