br.edu.ifpe.synesthesiavision.PermissionManager.java Source code

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Here is the source code for br.edu.ifpe.synesthesiavision.PermissionManager.java

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/*Copyright (C) 2017  Synesthesia Vision
*
*   This program is free software: you can redistribute it and/or modify
*   it under the terms of the GNU General Public License as published by
*   the Free Software Foundation, either version 3 of the License, or
*   (at your option) any later version.
*
*   This program is distributed in the hope that it will be useful,
*   but WITHOUT ANY WARRANTY; without even the implied warranty of
*   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
*   GNU General Public License for more details.
*
*   You should have received a copy of the GNU General Public License
*   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

package br.edu.ifpe.synesthesiavision;

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;

import java.util.ArrayList;
import java.util.List;

/**
 * Class for get permissions from user.
 */
public class PermissionManager {

    /**
     * Function that get permissions from user to use any phone elements
     *
     * @param      activity     The activity
     * @param      permissions  The permissions
     * @param      requestCode  The request code
     *
     * @return     return true when the permission is granted, else start activity compat to request permissions
     */
    public static boolean checkPermission(Activity activity, String[] permissions, int requestCode) {

        List<String> listPermission = new ArrayList<>();

        //If the phone has too old Android, this is not necessary.
        if (Build.VERSION.SDK_INT >= 23) {
            for (String permission : permissions) {

                //Check if the permission is granted
                boolean isOkPermission = ContextCompat.checkSelfPermission(activity,
                        permission) == PackageManager.PERMISSION_GRANTED;

                //If not, add to listPermission to get permission later.
                if (!isOkPermission)
                    listPermission.add(permission);
            }

            //if list has no elements, so all permissions are granted.
            if (listPermission.isEmpty())
                return true;

            //Creates a new Array of String which contains the permissions not granted.
            String[] newPermission = new String[listPermission.size()];
            listPermission.toArray(newPermission);

            //Show a dialog box to get permission from user.
            ActivityCompat.requestPermissions(activity, newPermission, requestCode);
        }

        return true;
    }
}