android – 从Camera保存图像将图片意图保存到应用程序私有存储

2019年8月6日 118次阅读

这里有很多关于如何在
android中的外部存储上创建文件的信息,将uri传递给ACTION_IMAGE_CAPTURE,然后将图像保存在那里.

但是,我想在Application的私有存储(有时称为内部存储)中创建一个文件,并将该文件uri传递给ACTION_IMAGE_CAPTURE,但Camera intent在onActivityResult中返回RESULT_CANCELED.

我该怎么办？

private void checkWhetherCameraIsAvailableAndTakeAPicture() {
    // Check wether this device is able to take pictures
    if (PhotoHandler.isIntentAvailable(a, MediaStore.ACTION_IMAGE_CAPTURE)) {
        System.gc();
        Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        File imageFile = null;

        try {
                if(a.application.user.isPublishImagesToGallery()){
                imageFile = a.application.photoHandler.createImageFileOnExternalStorage();
            } else {
                imageFile = a.application.photoHandler.createImageFileOnInternalStorage();
            }

            imagePath = imageFile.getAbsolutePath();
            takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(imageFile));
        } catch (IOException e) {
            e.printStackTrace();
            imageFile = null;
            imagePath = null;
        }
        startActivityForResult(takePictureIntent, Preferences.REQUEST_CODE_TAKE_IMAGE_WITH_CAMERA);
    } else { // Notify the user that their device is unable to take photos
        a.application.toastMaker.toastLong(ErrorMessages.DEVICE_UNABLE_TO_TAKE_PHOTOS);
    }
} // End of checkWhetherCameraIsAvailableAndTakeAPicture

public File createImageFileOnInternalStorage() throws IOException {
        return createTempFileOnGivenLocation();
    }

    private String imageFilename() {
        return filenamePrefix + Calendar.getInstance().getTimeInMillis();
    }

    private File createTempFileOnGivenLocation() throws IOException {
        File imageFile = File.createTempFile(imageFilename(), filenameSuffix, context.getFilesDir());
        setImagePathTemporary(imageFile.toString());

        return imageFile;
    }


@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    if (requestCode == Preferences.REQUEST_CODE_TAKE_IMAGE_WITH_CAMERA) {
        if (resultCode != Activity.RESULT_CANCELED) {
            handlePhotoTakenWithCamera();
        } else {
            // ONACTIVITYRESULT Returns Here!
            new File(imagePath).delete())
        }
    } else if (requestCode == Preferences.REQUEST_CODE_PICK_IMAGES_FROM_GALLERY) {
        if (resultCode != Activity.RESULT_CANCELED) {
            handlePhotosPickedFromGallery(data);
        }
    }
} // End of onActivityResult

最佳答案 每个应用程序的内部存储都是私有的Camera App无法访问应用程序的内部存储.在内部存储中获取图像的最佳方法是.

1)在app内使用自己的相机拍摄图像

要么

2)使用相机意图拍摄图像以捕获将图像保存到外部存储器的图片. onActivityResult将图像复制到应用程序的内部存储并从外部存储中删除.复制文件的代码可以在这个答案中找到. https://stackoverflow.com/a/4770586/4811470

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