Request permission

PermissionApplication.java

package com.mphone.callerplus;

import android.content.Context;
import android.content.pm.PackageManager;
import android.os.Build;
import android.support.annotation.NonNull;
import android.support.v4.app.Fragment;
import android.support.v4.content.ContextCompat;
import com.mphone.callerplus.utils.UIUtil;

/**
 * @author by Bramengton on 03.07.16.
 */
public final class PermissionApplication {
    private static final int MIN_API = 23; //Android M
    private static final int PERMISSION_REQUEST_CODE = 100;
    private boolean mIsPermissionGranted = false;
    private Fragment mFragment;
    private String[] mPermission;
    //private MIUIHelper mMIUIHelper;

    private OnFragmentPermissionListener mListener;
    public interface OnFragmentPermissionListener{
        void onPermissionGranted();
        void onPermissionDenied(String[] permissions);
    }

    public PermissionApplication(String[] permission){
        mPermission = permission;
        //mMIUIHelper = MIUIHelper.getInstance();
    }

    public boolean IsPermissionGranted(){
        return mIsPermissionGranted;
    }

    public void getCheckPermission(Fragment fragment, OnFragmentPermissionListener listener) {
        mListener = listener;
        mFragment = fragment;
        if(mIsPermissionGranted) return;
        if (isPermissionsEnabled(mFragment.getContext(), mPermission) && listener != null) {
            mIsPermissionGranted = true;
            mListener.onPermissionGranted();
        }else getRequestPermission(mFragment, mPermission);
    }

    public boolean isPermissionsEnabled(Context context, String[] permissions) {
        if (Build.VERSION.SDK_INT < MIN_API) return mIsPermissionGranted=true;
        int grant = 0;
        for (String permission: permissions)
            if(ContextCompat.checkSelfPermission(context, permission) == PackageManager.PERMISSION_GRANTED)
                grant++;
        return grant == permissions.length;
    }

    private void getApplicationRequestPermission(Fragment fragment, String[] permissions) {
        fragment.requestPermissions(permissions, PERMISSION_REQUEST_CODE);
    }

    public void getApplicationRequestPermission(String[] permissions) {
        if(mIsPermissionGranted) return;
        getApplicationRequestPermission(mFragment, permissions);
    }

    private void getRequestPermission(Fragment fragment,String[] permissions) {
        /*
        int should = 0;
        for (String permission: permissions)
            if(!fragment.shouldShowRequestPermissionRationale(permission))
                should++;
        if(should == permissions.length){}
        */
        getApplicationRequestPermission(fragment, permissions);
    }

    public void getRequestPermissionsResult(int requestCode, @NonNull final String[] permissions, @NonNull int[] grantResults) {
        if (requestCode == PERMISSION_REQUEST_CODE && grantResults.length > 0 && mListener!=null) {
            String[] mPermissionsDenied = new String[0];
            for (int i=0; i<permissions.length; i++) {
                if (grantResults[i] == PackageManager.PERMISSION_DENIED) {
                    mPermissionsDenied = UIUtil.addElement(mPermissionsDenied, permissions[i]);
                }
            }
            if(mPermissionsDenied.length==0){
                mIsPermissionGranted = true;
                mListener.onPermissionGranted();
            }else {
                mListener.onPermissionDenied(mPermissionsDenied);
            }
        }
    }

//    private String[] addElement(String[] org, String added) {
//        String[] result = Arrays.copyOf(org, org.length+1);
//        result[org.length] = added;
//        return result;
//    }

}