Android Runtime permissions helper class

RuntimePermissions.java & SplashActivity.kt

/**
The Runtime permissions helper class
**/
public class RuntimePermissions {

    private Context mContext;
    private String[] permissions;


    public RuntimePermissions(String[] permissions, Context context){

        this.mContext = context;
        this.permissions = permissions;

        int PERMISSION_ALL = 1;

        if(!hasPermissions()){
            ActivityCompat.requestPermissions((Activity) mContext, permissions, PERMISSION_ALL);
        }
    }


    public boolean hasPermissions() {
        if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && mContext != null && permissions != null) {
            for (String permission : permissions) {
                if (ActivityCompat.checkSelfPermission(mContext, permission) != PackageManager.PERMISSION_GRANTED) {
                    return false;
                }
            }
        }
        return true;
    }
}

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/**
  Usage Example in Kotlin in a demo Activity
  ------------------------------------------
  
  1. We have to redirect from SplashActivity to MainActivity after getting permissions.
  2. If Permissions not given, don't redirect and show permission dialog again.
  
**/

class SplashActivity : AppCompatActivity() {

    /**
     * How does it work?
     * -----------------
     *
     * Get the permissions from user and redirect to some other Activity.
     * If Permissions not given, don't redirect and show permission dialog again.
     */


    private lateinit var intent_to_other_activity : Intent
    private var PERMISSION_CODE = 100
    private lateinit var permissions : Array<String>


    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        /**
         * Configurable things - 1. Change this as per your Activity your are sending an Intent to.
         */
        intent_to_other_activity = Intent(this@SplashActivity, MainActivity::class.java)

        /**
         * Configurable things - 2. Define all your permissions here.
         */
        permissions = arrayOf<String>(android.Manifest.permission.READ_EXTERNAL_STORAGE,
                android.Manifest.permission.WRITE_EXTERNAL_STORAGE, android.Manifest.permission.CAMERA)


        checkPermissions(permissions)

    }


    fun checkPermissions(permissions: Array<String>){
        var mRuntimePermissions = RuntimePermissions(permissions, this)
        var gotPermissions = mRuntimePermissions.hasPermissions()

        if(gotPermissions == true){

            startActivity(intent_to_other_activity)
            finish()
        }
        else{
            ActivityCompat.requestPermissions(this, permissions, PERMISSION_CODE);
        }
    }


    override fun onRequestPermissionsResult(requestCode: Int,
                                            permissions: Array<String>, grantResults: IntArray) {
        for(i in 0 until permissions.size){
            if(grantResults[i] != PackageManager.PERMISSION_GRANTED){

                checkPermissions(permissions)
            }
        }

        if((permissions.size != 0) && (!grantResults.contains(PackageManager.PERMISSION_DENIED))){
            startActivity(intent_to_other_activity)
            finish()
        }
    }

}