使用Android Nougat在图库中打开图像

我想在Android Nougat的库中打开已保存的图片，但我得到的是一个黑色图库页面，上面写着无法加载照片。

I want to open a saved image in gallery on Android Nougat but what I get is a black gallery page with message "Can't load the photo".

这是我的代码：

清单

    <provider
        android:name="android.support.v4.content.FileProvider"
        android:authorities="${applicationId}.provider"
        android:exported="false"
        android:grantUriPermissions="true">
        <meta-data
            android:name="android.support.FILE_PROVIDER_PATHS"
            android:resource="@xml/provider_paths"/>
    </provider>

provider_paths.xml

<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
 <external-path name="external_files" path="."/>
</paths>

DrawView中生成的路径

public static boolean save(Bitmap bitmap){
    Date now = new Date();
    SimpleDateFormat simpleDateFormat = new SimpleDateFormat("dd-MM-yyyy'_'HH:mm");

    File folder = new File(Environment.getExternalStorageDirectory() +
            File.separator + "Crash");
    if (!folder.exists()) {
        folder.mkdirs();
    }

    FileOutputStream fos = null;
    try {
        lastImagePath = new File(Environment.getExternalStorageDirectory().toString() + "/Crash/" + simpleDateFormat.format(now) + ".jpg");
        fos = new FileOutputStream(lastImagePath);
        bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fos);

        fos.flush();
        fos.close();
        fos = null;
        return true;
    } catch (IOException e) {
        e.printStackTrace();
        return false;
    }

    finally {
        if (fos != null) {
            try {
                fos.close();
            } catch (IOException e) {}
        }
    }
}

打开图像侦听器

    private class OpenImageListener implements View.OnClickListener{

    @Override
    public void onClick(View v) {
        if(Build.VERSION.SDK_INT < Build.VERSION_CODES.N){
            Intent intent = new Intent();
            intent.setAction(Intent.ACTION_VIEW);
            intent.setDataAndType(Uri.parse("file://" + DrawView.getLastImagePath().getAbsolutePath()), "image/*");
            startActivity(intent);
        } else {
            Intent intent = new Intent();
            intent.setAction(Intent.ACTION_VIEW);
            Uri photoUri = FileProvider.getUriForFile(MainActivity.this, BuildConfig.APPLICATION_ID + ".provider", DrawView.getLastImagePath());
            intent.setData(photoUri);
            startActivity(intent);
        }
    }
}

也许我生成错误的路径对于图像，但旧的版本它的工作原理（我在Marshmallow上尝试并且效果很好）。

Maybe I generate a wrong path for the image, but with old version it works (I tried on Marshmallow and works great).

有人可以帮助我吗？谢谢。

Can someone help me? Thanks.