使用Picasso将图像放入Drawable中

Question

我试图使用Square中的Picasso从URL中提取jpg,然后附加到EditText.Picasso的原因在于它在实现中非常轻量级.可以看出我使用占位符ImageView,毕加索将从提供的URL导入图像,然后我将ImageView转换为Drawable.ImageGetter也是如此.但是,当使用下面的配置时,我收到空指针错误.(注意,当简单地使用应用程序资源中的drawable代替下面的'drawImage'变量时,此配置有效,但我正在尝试扩展它以从URL中提取资源).

这里有什么不合适的地方吗？或者更有效的方法来做到这一点？

附加到EditText的方法:

public void appendToMessageHistory(String username, String message) {
        if (username != null && message != null) {

            ImageView image = new ImageView(getApplicationContext());

            Picasso.with(getBaseContext()).load("http://localhost:3000/uploads/campaign/image/2/2.jpg").into(image);
            Drawable drawImage = image.getDrawable();

            messageHistoryText.append(Html.fromHtml("<b>" + username + ":"
                    + "</b>" + "<br>"));
            messageHistoryText.append(Html.fromHtml(message + "<hr>" + "<br>")
                    + System.getProperty("line.separator") + "");

            messageHistoryText.append(Html.fromHtml("<img src = '"
            + drawImage + "'/>",
            imageGetter, null));

        }
    }

ImageGetter:

ImageGetter imageGetter = new ImageGetter() {

@Override
public Drawable getDrawable(String source) {
    ImageView image = new ImageView(getApplicationContext());

    Picasso.with(getBaseContext()).load("http://localhost:3000/uploads/campaign/image/2/2.jpg").into(image);
    Drawable drawImage = image.getDrawable();

    drawImage.setBounds(0, 0, drawImage.getIntrinsicHeight(), drawImage.getIntrinsicWidth());
    return drawImage;


}

};

Answer 1

你有点想念毕加索.您可以在inTo方法中设置一个匿名的Target类,并将位图设置为您拥有的任何对象:

Picasso.with(getBaseContext()).load("your url").into(new Target() {

                @Override
                public void onPrepareLoad(Drawable arg0) {


                }

                @Override
                public void onBitmapLoaded(Bitmap bitmap, LoadedFrom arg1) {
                    // TODO Create your drawable from bitmap and append where you like.

                }

                @Override
                public void onBitmapFailed(Drawable arg0) {


                }
            });

编辑 所以这就是你这样做的方式:

public void appendToMessageHistory(String username, String message) {
        if (username != null && message != null) {

            ImageView image = new ImageView(getApplicationContext());

            Picasso.with(getBaseContext()).load("image url").into(new Target() {

                    @Override
                    public void onPrepareLoad(Drawable arg0) {


                    }

                    @Override
                    public void onBitmapLoaded(Bitmap bitmap, LoadedFrom arg1) {
                    Drawable drawImage = new BitmapDrawable(getBaseContext().getResources(),bitmap);
                     messageHistoryText.append(Html.fromHtml("<b>" + username + ":"
                    + "</b>" + "<br>"));
                    messageHistoryText.append(Html.fromHtml(message + "<hr>" + "<br>")
                    + System.getProperty("line.separator") + "");

                    messageHistoryText.append(Html.fromHtml("<img src = '"
                    + drawImage + "'/>",
                    imageGetter, null));    
                    }

                    @Override
                    public void onBitmapFailed(Drawable arg0) {


                    }
                });




        }
    }