在 AsyncTask 中使用 picasso 加载图像 [英] Loading Image using picasso inside AsyncTask

问题描述

我正在使用 picasso 加载图像作为我的 Activity 的背景，我想使用 AsyncTask，在加载图像时，完成后，进度条会消失，以便为我的应用程序提供更好的外观，

I'm using picasso to load an image as a background for my activity, I want to use an AsyncTask, while the image is loading, when done the progress bar dismisses to give better appearance to my application,

这是我的代码:

  private class RemoteDataTask extends AsyncTask<Void, Void, Void> {
    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        mProgressDialog = new ProgressDialog(MainActivity.this);
        mProgressDialog.setMessage("Chargement...");
        mProgressDialog.setIndeterminate(false);
        mProgressDialog.show();

    }

    @Override
    protected Void doInBackground(Void... params) {
           Picasso.with(MainActivity.this).load("http://tv2.orangeadd.com/mediacenter-data/ofc__bg_home.jpg").into(background,new com.squareup.picasso.Callback() {
                 @Override
                 public void onSuccess() {
               mProgressDialog.dismiss();
                 }

                 @Override
                 public void onError() {

                 }
             }); 
        return null;
    }
    @Override
    protected void onPostExecute(Void result) {





    }
    }

这总是显示错误并强制我的应用程序退出！

this is always showing an error and forcing my application to quit !

谢谢各位:)

推荐答案

public void loadImageInBackground() {

        mProgressDialog = new ProgressDialog(MainActivity.this);
        mProgressDialog.setMessage("Chargement...");
        mProgressDialog.setIndeterminate(false);

        Target target = new Target() {

            @Override
            public void onPrepareLoad(Drawable arg0) {

                mProgressDialog.show();
            }

            @Override
            public void onBitmapLoaded(Bitmap arg0, LoadedFrom arg1) {

                background.setImageBitmap(arg0);
                mProgressDialog.dismiss();
            }

            @Override
            public void onBitmapFailed(Drawable arg0) {
                // TODO Auto-generated method stub
                mProgressDialog.dismiss();
            }
        };

        Picasso.with(MainActivity.this)
                .load("http://tv2.orangeadd.com/mediacenter-data/ofc__bg_home.jpg")
                .into(target);
    }

这篇关于在 AsyncTask 中使用 picasso 加载图像的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！