[Android] How to use the prebuilt .so lib files (ndk native C++)

Related post: https://medium.com/@nhancv/android-set-up-an-environment-for-c-native-ndk18-50b146b4dad0

Create jniLibs folder place at:

app/src/main/jniLibs

Push *.so files with respective platform (arm64-v8a, armeabi-v7a, x86, x86_64) folder:

app/src/main/jniLibs/armeabi-v7a/native-lib.so

Update app/src/main/java/com/nhancv/myapplication/MainActivity.java

package com.nhancv.myapplication;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
    static {
        System.loadLibrary("native-lib");
    }
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        // Example of a call to a native method
        TextView tv = findViewById(R.id.sample_text);
        tv.setText(stringFromJNI());
    }
    /**
     * A native method that is implemented by the 'native-lib' native library,
     * which is packaged with this application.
     */
    public native String stringFromJNI();
}