SampleActivity.java

File file = ...

// (1)
// intent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(file));

// (2)
Uri uri = FileProvider.getUriForFile(
                                    【アクティビティ名】.this
                                    ,getApplicationContext().getPackageName() + ".provider"
                                    , file);

intent.putExtra(Intent.EXTRA_STREAM, uri);
intent.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION | Intent.FLAG_GRANT_READ_URI_PERMISSION);
startActivity(intent);