我终于找到了解决方案

public void shareVideoWhatsApp() {


        Uri uri = Uri.fromFile(v);
        Intent videoshare = new Intent(Intent.ACTION_SEND);
        videoshare.setType("*/*");
        videoshare.setPackage("com.whatsapp");
        videoshare.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
        videoshare.putExtra(Intent.EXTRA_STREAM,uri);

        startActivity(videoshare);

    }