加载失真图片触发JNI错误致APP崩溃，求错误捕获方案

问题分析 #

崩溃根源是系统BitmapFactory解码图片元数据时，图片的ColorSpace传输参数超出[0..1]范围，抛出IllegalArgumentException，但该异常在JNI层未被捕获，且Fresco工作线程未设置未捕获异常处理器，最终导致APP崩溃。

解决方案 #

1. 全局线程异常捕获（快速止损） #

在Application中设置全局未捕获异常处理器，拦截所有线程的未捕获异常，避免APP崩溃：

public class MyApp extends Application {
    @Override
    public void onCreate() {
        super.onCreate();
        // 设置全局异常处理器
        Thread.setDefaultUncaughtExceptionHandler((thread, throwable) -> {
            Log.e("ImageCrash", "线程[" + thread.getName() + "]发生未捕获异常", throwable);
            // 可添加日志上报、错误页面跳转等逻辑
        });
        Fresco.initialize(this);
    }
}

2. 自定义Fresco解码逻辑（精准修复） #

通过自定义BitmapDecoder，在解码环节捕获ColorSpace相关异常，从源头阻止崩溃：

步骤1：实现安全解码的BitmapDecoder

public class SafeBitmapDecoder implements BitmapDecoder {
    private final BitmapDecoder mOriginalDecoder;

    public SafeBitmapDecoder(BitmapDecoder originalDecoder) {
        mOriginalDecoder = originalDecoder;
    }

    @Override
    public Bitmap decode(PooledByteBuffer input, int length, BitmapFactory.Options options) throws IOException {
        try {
            return mOriginalDecoder.decode(input, length, options);
        } catch (IllegalArgumentException e) {
            // 匹配ColorSpace参数异常
            if (e.getMessage() != null && e.getMessage().contains("Parameter d must be in the range [0..1]")) {
                // 强制使用默认色彩配置，跳过错误的ColorSpace解析
                options.inPreferredConfig = Bitmap.Config.ARGB_8888;
                options.inColorSpace = null;
                return mOriginalDecoder.decode(input, length, options);
            }
            throw e;
        } catch (Throwable t) {
            Log.e("SafeDecoder", "图片解码失败", t);
            return null;
        }
    }
}

步骤2：初始化Fresco时使用自定义配置

public class MyApp extends Application {
    @Override
    public void onCreate() {
        super.onCreate();
        ImagePipelineConfig config = ImagePipelineConfig.newBuilder(this)
                .setBitmapDecoderFactory(() -> new SafeBitmapDecoder(DefaultBitmapDecoder.newInstance()))
                .build();
        Fresco.initialize(this, config);
    }
}

3. 加载失败时显示占位图（优化体验） #

给DraweeController添加监听，加载失败时显示错误占位图：

public static void loadResizeImage(SimpleDraweeView imageView, String url,
                                   int widthDP, int heightDP) {
    ImageRequest request = ImageRequestBuilder
            .newBuilderWithSource(Uri.parse(url))
            .setResizeOptions(new ResizeOptions(widthDP, heightDP))
            .setLocalThumbnailPreviewsEnabled(false)
            .build();
    DraweeController controller = Fresco.newDraweeControllerBuilder()
            .setImageRequest(request)
            .setOldController(imageView.getController())
            .setControllerListener(new BaseControllerListener<ImageInfo>() {
                @Override
                public void onFailure(String id, Throwable throwable) {
                    super.onFailure(id, throwable);
                    imageView.setImageResource(R.drawable.ic_image_load_fail);
                }
            })
            .build();

    imageView.setController(controller);
}

内容的提问来源于stack exchange，提问作者stavros.3p