Question

我想使用滑行将图像加载到位图中，但会引发错误

java.lang.IllegalArgumentException：您必须在后台线程上调用此方法在com.bumptech.glide.util.Util.assertBackgroundThread（Util.java:141）在com.bumptech.glide.request.RequestFutureTarget.doGet（RequestFutureTarget.java:186）在com.bumptech.glide.request.RequestFutureTarget.get（RequestFutureTarget.java:108）在extend.BitmapLoader.loadBitmapFromFile_Glide（BitmapLoader.java:60）

这是我的代码：

_runnable_animation = new Runnable() {
            @Override
            public void run() {
                bm = get_bitmap();
            }
};

_handler_animation.postDelayed(_runnable_animation, _RUNNABLE_THREAD_DELAY);

这是我的get_bitmap（）方法：

try {
        return Glide.with(context)
                    .asBitmap()
                    .load(new File(path))
                    .submit(500, 500)
                    .get();
        } catch (InterruptedException e) {
            e.printStackTrace();
            return null;
        } catch (ExecutionException e) {
            e.printStackTrace();
            return null;
        }

Answer 1

我正在使用以下方法获取位图

 public static void loadBitmapFromServer(Context context, String url, final OnBitmapLoadedListener callback) {
        try { 
     Glide.with(context).load(url)
                            .asBitmap()
                            .priority(Priority.IMMEDIATE)
                            .listener(new RequestListener<String, Bitmap>() {
                                @Override
                                public boolean onException(Exception e, String model, Target<Bitmap> target, boolean isFirstResource) {
                                    return false;
                                }

                                @Override
                                public boolean onResourceReady(Bitmap resource, String model, Target<Bitmap> target, boolean isFromMemoryCache, boolean isFirstResource) {
                                    // you can do whatever you want to do with Bitamp
                                    callback.onBitmapLoaded(resource);
                                    return false;
                                }
                            });
              } catch (Exception e) {}
        }

像这样声明接口

 public interface OnBitmapLoadedListener {
        void onBitmapLoaded(Bitmap resource);
    }

Answer 2

确保您像下面那样启动了新线程

mThread = new Thread(_runnable_animation);
mThread.start();

Answer 3

@NJ答案足够好，但是如果您想让您的方法起作用，请创建后台线程处理程序而不是主线程处理程序。在这里，我修改了您的代码以使其正常工作。

HandlerThread bgThread = new HandlerThread("BitmapLoaderThread");
bgThread.start();

// initialize your _handler_animation  like below
Handler _handler_animation = new Handler(bgThread.getLooper());

Runnable _runnable_animation = new Runnable() {
    @Override
    public void run() {
      bm = get_bitmap();
    }
};

_handler_animation.postDelayed(_runnable_animation, _RUNNABLE_THREAD_DELAY);

还要进行清理，更好的地方是Activity＃onDestroy

  @Override
  public void onDestroy() {
    _handler_animation.getLooper().quit();
    super.onDestroy();
  }

Answer 4

您应该像这样全局定义位图变量：

Bitmap bitmap;

Glide.with(context).load(url)
                    .asBitmap()
                    .listener(new RequestListener<String, Bitmap>() {
                        @Override
                        public boolean onException(Exception e, String model, Target<Bitmap> target, boolean isFirstResource) {
                            return false;
                        }

                        @Override
                        public boolean onResourceReady(Bitmap resource, String model, Target<Bitmap> target, boolean isFromMemoryCache, boolean isFirstResource) {
                            // After getting bitmap
                            bitmap = resource
                            return false;
                        }
                    });

Glide-如何在可运行状态下获取位图

4 个答案: