android - 使用 Intent 在 Android 应用程序中共享图像将其作为文本文件而不是照片发送

Question

我正在尝试以编程方式截取屏幕截图，然后使用 Intent 将其共享到另一个应用程序。我面临的问题是照片是作为文本文件发送的。

按钮监听器如下所示:

shareButton = rootView.findViewById(R.id.shareButton);
    shareButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Bitmap screenshot = Screenshot.takeScreenshot(view.getRootView());
            String filename = "eduMediaPlayerScreenshot";
            String sharePath = Screenshot.storeScreenshot(screenshot, filename);
            Intent intent = Screenshot.shareScreenshot(sharePath, view.getRootView());
            startActivity(intent);
        }
    });

屏幕截图类是这样的:

    public class Screenshot {

    public static Bitmap takeScreenshot(View view) {
        view.setDrawingCacheEnabled(true);
        view.buildDrawingCache(true);
        Bitmap screenshot = Bitmap.createBitmap(view.getDrawingCache());
        view.setDrawingCacheEnabled(false);
        return screenshot;
    }

    public static String storeScreenshot(Bitmap screenshot, String filename) {
        String path = Environment.getExternalStorageDirectory().toString() + "/" + filename;
        OutputStream out = null;
        File imageFile = new File(path);

        try {
            out = new FileOutputStream(imageFile);
            screenshot.compress(Bitmap.CompressFormat.JPEG, 99, out);
            out.flush();

        } catch (FileNotFoundException e) {
            Log.i("Exception:", "File not found.");

        } catch (IOException e) {
            Log.i("Exception:", "Cannot write to output file.");

        } finally {

            try {
                if (out != null) {
                    out.close();
                    return imageFile.toString();
                }

            } catch (Exception e) {
                Log.i("Exception:", "No output file to close.");
            }

        }
        return null;
    }

    public static Intent shareScreenshot(String sharePath, View view) {
        File file = new File(sharePath);
        Uri uri = FileProvider.getUriForFile(view.getContext(),
                BuildConfig.APPLICATION_ID + ".provider", file);
        Intent intent = new Intent(Intent.ACTION_SEND);
        intent.setType("image/*");
        intent.putExtra(Intent.EXTRA_STREAM, uri);
        intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
        return intent;
    }
}

分享的照片是这样的: not-the-best-photo

Answer 1

由于默认情况下 Android 无法识别没有扩展名的图像，因此您应该按照上述 Intent 将 .jpg 添加到文件名的末尾。没有它，应该指定一个 MIME 类型。更多详情here .

这是您可能想要使用的代码。

shareButton = rootView.findViewById(R.id.shareButton);
shareButton.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        Bitmap screenshot = Screenshot.takeScreenshot(view.getRootView());
        String filename = "eduMediaPlayerScreenshot.jpg";
        String sharePath = Screenshot.storeScreenshot(screenshot, filename);
        Intent intent = Screenshot.shareScreenshot(sharePath, view.getRootView());
        startActivity(intent);
    }
});