Problem - Intent to install APK file - Android Nougat

I searched extensively and did not find the problem. When trying to install an APK file using a Intent in Android Nougat , it simply does not install and displays the following warning: "There was a problem parsing the package."

It works perfectly to open PDF files, for example, with adjustments to open this type of file (% with%). But to install. APK does not work.

No .PDF does not show any errors and I can not reach any solution.

What could be wrong?

Follow the code below:

Manifest :

<provider
    android:name="android.support.v4.content.FileProvider"
    android:authorities="br.com.xxxxxxx.xxxxxxx.fileprovider"
    android:exported="false"
    android:grantUriPermissions="true">
    <meta-data
        android:name="android.support.FILE_PROVIDER_PATHS"
        android:resource="@xml/filepaths"/>
</provider>

xml / filepaths:

<files-path name="storage/emulated/0" path="."/>

Code:

if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
    try {
        Intent intent = new Intent(Intent.ACTION_INSTALL_PACKAGE);
        File file = new File(getContext().getFilesDir(), "app-debug.apk");
        Uri uri = FileProvider.getUriForFile(getContext(), BuildConfig.APPLICATION_ID + ".fileprovider", file);

        intent.setDataAndType(uri, "application/vnd.android.package-archive");
        intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
        startActivity(intent);
        finish();
    } catch (Exception e) {
        e.printStackTrace();
    }
}else{
    try {
        Intent intent = new Intent(Intent.ACTION_VIEW);
        File file = new File(Environment.getExternalStorageDirectory() + "/app-debug.apk");

        intent.setAction(android.content.Intent.ACTION_VIEW);
        intent.setDataAndType(Uri.fromFile(file), "application/vnd.android.package-archive");
        intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
        startActivity(intent);
        finish();
    } catch (Exception e) {
        e.getMessage();
    }
}

Please, what could be wrong with this code? Can anyone help me?