[移动开发]Android Jetpack中CameraX基于ImageCapture.OnImageCapturedCallback()保存图片

在cameraX中ImageCapture提供了takePicture 的2个方法：

 public void takePicture(@NonNull Executor executor,
            final @NonNull OnImageCapturedCallback callback)

 public void takePicture(
            final @NonNull OutputFileOptions outputFileOptions,
            final @NonNull Executor executor,
            final @NonNull OnImageSavedCallback imageSavedCallback)

其中方法二 网上有很多方法保存图片,这点就不记录了.

方法一 我研究的时候博文很少讲到,特别对这个 ImageCapture.OnImageCapturedCallback()的描素 太少了 ，所以我就研究了一番。

    /**
     * 拍摄照片
     */
    @SuppressLint("RestrictedApi")
    private void takenPictureInternal() {
        if (mImageCapture != null) {
            mImageCapture.takePicture(CameraXExecutors.mainThreadExecutor(), new ImageCapture.OnImageCapturedCallback() {
                @SuppressLint("UnsafeOptInUsageError")
                @Override
                public void onCaptureSuccess(@NonNull ImageProxy image) {
                    super.onCaptureSuccess(image);
                    LogUtils.i("拍照图片格式：" + ImageUtilKt.getImageName(image.getFormat()));
                    if (image.getFormat() == YUV_420_888) {
                        //创建一个新空白位图
                        Bitmap bgBitmap = Bitmap.createBitmap(image.getWidth(), image.getHeight(), Bitmap.Config.ARGB_8888);
                        YuvToRgbConverter yuvToRgbConverter = new YuvToRgbConverter(mContext);
                        yuvToRgbConverter.yuvToRgb(image.getImage(), bgBitmap);
                        if (bgBitmap != null) {
                            String path = SDP + "photo/" + TimeExtUtils.getCurr7() + ".jpg";
                            boolean fileByDeleteOldFile = FileUtils.createFileByDeleteOldFile(path);
                            if (fileByDeleteOldFile) {
                                ImageUtils.save(bgBitmap, path, Bitmap.CompressFormat.JPEG);
                                LogUtils.i("保存路径：" + path);
                                ThreadUtils.runOnUiThread(() -> {
                                    T.info("保存路径：" + path);
                                });
                            }
                        }
                    } else if (image.getFormat() == ImageFormat.JPEG) {
                        ImageProxy.PlaneProxy[] planes = image.getPlanes();
                        ByteBuffer buffer = planes[0].getBuffer();
                        int size = buffer.remaining();
                        byte[] jpeg = new byte[size];
                        buffer.get(jpeg, 0, size);

                        Bitmap bitmap = ImageUtils.getBitmap(jpeg, 0);
                        String path = SDP + "photo/" + TimeExtUtils.getCurr7() + ".jpg";
                        boolean save = ImageUtils.save(bitmap, path, Bitmap.CompressFormat.JPEG);
                        T.info("图片保存：" + (save ? "成功！！！" : "失败！！！"));
                    }
                }

                @Override
                public void onError(@NonNull ImageCaptureException exception) {
                    super.onError(exception);
                    exception.printStackTrace();
                }
//使用完image关闭
                    image.close();
            });


//            final ContentValues contentValues = new ContentValues();
//            contentValues.put(MediaStore.MediaColumns.DISPLAY_NAME, CAPTURED_FILE_NAME
//                    + "_" + TimeExtUtils.getCurr7());
//            contentValues.put(MediaStore.MediaColumns.MIME_TYPE, CAPTURED_FILE_NAME_END);
//            //
//            ImageCapture.OutputFileOptions outputFileOptions =
//                    new ImageCapture.OutputFileOptions.Builder(
//                            getContentResolver(),
//                            MediaStore.Images.Media.EXTERNAL_CONTENT_URI, contentValues)
//                            .build();
//            mImageCapture.takePicture(outputFileOptions, CameraXExecutors.ioExecutor(),
//                    new ImageCapture.OnImageSavedCallback() {
//                        @Override
//                        public void onImageSaved(@NonNull ImageCapture.OutputFileResults outputFileResults) {
//                            StringBuilder builder = new StringBuilder();
//                            builder.append("图片保存路径：").append(outputFileResults.getSavedUri().getPath()).append("\n");
//                            LogUtils.i(builder);
//                            ThreadUtils.runOnUiThread(() -> {
//                                T.info(builder.toString());
//                            });
//                        }
//
//                        @Override
//                        public void onError(@NonNull ImageCaptureException exception) {
//                            exception.printStackTrace();
//                        }
//                    });
        }
    }

这个获取到的图片格式为 image.getFormat() == ImageFormat.JPEG.

通过获取 image.getPlanes()拿到字节数组，然后生成bitmap保存 ,这点也可以直接保存.

参考博文：cAndroid CameraX Analyzer ImageProxy YUV_420_888 to NV21 - 简书