AppPermissionChecker.java

package com.prateekj.snooper.infra;

import android.app.Activity;
import android.content.pm.PackageManager;
import android.os.Build;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;

public class AppPermissionChecker {
  private int permissionRequestCode;
  private PermissionRequestCallBack callBack;
  private Activity activity;

  public AppPermissionChecker(Activity activity) {
    this.activity = activity;
  }

  public void handlePermission(String permission, int permissionRequestCode, PermissionRequestCallBack callBack) {
    this.permissionRequestCode = permissionRequestCode;
    this.callBack = callBack;
    if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
      if (ContextCompat.checkSelfPermission(activity, permission) != PackageManager.PERMISSION_GRANTED) {
        ActivityCompat.requestPermissions(activity, new String[]{permission}, permissionRequestCode);
      } else {
        callBack.permissionGranted();
      }
    } else {
      callBack.permissionGranted();
    }
  }

  public void handlePermissionResult(int requestCode, String[] permissions, int[] grantResults) {
    if (requestCode == permissionRequestCode && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
      callBack.permissionGranted();
    } else {
      callBack.permissionDenied();
    }

  }

  public interface PermissionRequestCallBack {
    void permissionGranted();
    void permissionDenied();
  }
}