RxPermissions Usage

refs:
https://github.com/tbruyelle/RxPermissions

https://www.jianshu.com/p/c3546e5cd2ff
https://www.jianshu.com/p/314e9e27592f

allprojects {
    repositories {
        ...
        maven { url 'https://jitpack.io' }
    }
}

dependencies {
    implementation 'com.github.tbruyelle:rxpermissions:0.10.2'
}

package com.example.testperms;

import android.Manifest;
import android.annotation.SuppressLint;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

import com.tbruyelle.rxpermissions2.RxPermissions;

public class RxPermActivity extends AppCompatActivity {

    @SuppressLint("CheckResult")
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_rx_perm);

        final RxPermissions rxPermissions = new RxPermissions(this); // where this is an Activity or Fragment instance
        // Must be done during an initialization phase like onCreate
        rxPermissions
                .request(Manifest.permission.CAMERA,
                        Manifest.permission.READ_PHONE_STATE)
                .subscribe(granted -> {
                    if (granted) { // Always true pre-M
                        // I can control the camera now
                    } else {
                        // Oups permission denied
                    }
                });
    }
}