如何在不使用 ImageView 的情况下使用 Picasso 加载位图?

问题描述

使用ImageView，我可以使用下面的代码通过回调下载图片

With ImageView, I can use the following code to download image with callback

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

    @Override
    public void onError() { }
);

或者简单地从这个 Picasso.with(activity).load(url).get(); 获取位图.无论如何要添加回调以仅下载图像?如果可能，请提供示例代码，干杯！

Or simply get the Bitmap from this Picasso.with(activity).load(url).get();. Is there anyway to add callback for just download the image? If possible please provide sample code, Cheers!

推荐答案

你可以创建一个 Target 然后修改里面的Bitmap目标回调方法 onBitmapLoaded(...).方法如下:

You can create a Target and then modify the Bitmap inside the Targets callback method onBitmapLoaded(...). Here is how:

// 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
}

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