在服务中使用 picasso 加载图像 class

Question

我对 android 应用程序中的一点印象深刻。我正在开发一个应用程序，我在其中使用服务 class，并且我通过我的服务 class 接收通知。现在有一个场景，我想更改我的 phone 应用程序的墙纸，我在我的代码中成功地做到了这一点，但是当我投入服务 class 时，应用程序崩溃并给出错误 picasso should 运行在主线程中。实际上在我的应用程序中有一个场景，如果我收到通知，即使我的应用程序在后台，那么壁纸应该被更改。这是我的代码：

public class FirebaseMessagingServices extends FirebaseMessagingService {
    @Override
    public void onMessageReceived(RemoteMessage remoteMessage) {
      RemoteMessage.Notification notification = remoteMessage.getNotification();

        if (data.isEmpty()) {
            System.out.println("FCM type is Notification");
            parseNotificationMessage(notification);

        }
        else {
            System.out.println("FCM type is Data");
            parseDataMessage(remoteMessage);
        }

    }

这里我正在更改接收消息的方式，在接收消息时我会检查消息并生成通知

    private void parseDataMessage(RemoteMessage remoteMessage) {
        String notification_title =remoteMessage.getData().get("title");

        String notification_message = remoteMessage.getData().get("message");

        if(notification_title.contains("wallpaper"))
        {
            changeWallpaper(notification_message);
        }
  else
        {
            generateNotification(remoteMessage.getData().get("title"), 
            remoteMessage.getData().get("message"));
        }

}

 public void changeWallpaper(String url)
    {
              final WallpaperManager myWallpaperManager
                = WallpaperManager.getInstance(activity);
        Picasso.with(activity).load(url).into(new Target() {
            @Override
            public void onBitmapLoaded(Bitmap bitmap, Picasso.LoadedFrom from) {
                Log.i("ok", "The image was obtained correctly");
                try {
                    myWallpaperManager.setBitmap(bitmap);
                    Toast.makeText(activity, "Image has been set as Desktop Wallpaper", Toast.LENGTH_SHORT).show();
                 //   ((Activity) activity).findViewById(R.id.progressbar_wallpaper).setVisibility(View.GONE);
                } catch (IOException e) {
                    e.printStackTrace();
                }

            }

            @Override
            public void onBitmapFailed(Drawable errorDrawable) {
                Log.e("ok", "The image was not obtained");
            }

            @Override
            public void onPrepareLoad(Drawable placeHolderDrawable) {
                Log.e("ok", "Getting ready to get the image");
                //Here you should place a loading gif in the ImageView
                //while image is being obtained.
            }
        });

    }

这已成功更改主线程上的壁纸，但我想在服务 class 中更改壁纸，即使应用程序在后台也是如此。任何形式的帮助将不胜感激

Answer 1

我通过使用 glide 库代替 picasso 解决了这个问题，即使在应用程序处于后台时它也能顺利运行

final WallpaperManager myWallpaperManager
                = WallpaperManager.getInstance(this);

        Glide.with(getApplicationContext())
                .asBitmap()
                .load(url)
                .into(new SimpleTarget<Bitmap>() {
                    @Override
                    public void onResourceReady(Bitmap resource, Transition<? super Bitmap> transition) {
                        try {
                            myWallpaperManager.setBitmap(resource);
                        } catch (IOException e) {
                            e.printStackTrace();
                        }

                    }

                });

在服务中使用 picasso 加载图像 class

Load the image with picasso in a service class

service

android

picasso