如何在不使用ImageView的情况下使用Picasso加载位图？

Question

有了ImageView,我可以使用以下代码下载带回调的图像

Picasso.with(activity).load(url).into(imageView, new Callback()
{
    @Override
    public void onSuccess() 
    {
        // do something
    }

    @Override
    public void onError() { }
);

或者只是从中获取Bitmap Picasso.with(activity).load(url).get();.无论如何都要添加回调才能下载图像？如果可能请提供示例代码,干杯!

Answer 1

您可以创建一个 Target然后修改BitmapTargets回调方法的内部onBitmapLoaded(...).方法如下:

// make sure to set Target as strong reference
private Target loadtarget;

public void loadBitmap(String url) {

    if (loadtarget == null) loadtarget = new Target() {
        @Override
        public void onBitmapLoaded(Bitmap bitmap, Picasso.LoadedFrom from) {
            // do something with the Bitmap
            handleLoadedBitmap(bitmap);
        }

        @Override
        public void onBitmapFailed() {

        }
    };

    Picasso.with(this).load(url).into(loadtarget);
}

public void handleLoadedBitmap(Bitmap b) {
    // do something here
}