WPA2-PSK wifi AP. How to create in android programmatically?

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Java

Android

MS-Access

WiFi

Good day! Please, help me understand why WPA2-PSK Wifi Access Point is not created. What do I have:

What I have tried:

AndroidManifest.xml:

<uses-permission android:name="android.permission.WRITE_SETTINGS" />
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />

build.gradle:

compileSdkVersion 27
    buildToolsVersion "27.0.3"
    defaultConfig {
        applicationId "com.java.name"
        minSdkVersion 19
        targetSdkVersion 27
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }

I have tried different types of codes creating wifi AP:

How to create a WPA2_PSK based hotspot from android app – Solutions Bits[^]

Creating WPA2 PSK Access Point in Android Programmatically - Stack Overflow[^]


Application is launched on Xiaomi Redmi Note4, Android version - 7.0

Unfortunately none of solutions helped me, I`m still getting Wifi AP created but it is open and without password. Please, does anybody know what is the problem? Thank you.