BaseFragment.java

/*
 * Copyright (C) 2015-2016 Willi Ye <williye97@gmail.com>
 *
 * This file is part of Kernel Adiutor.
 *
 * Kernel Adiutor 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.
 *
 * Kernel Adiutor 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 Kernel Adiutor.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
package com.grarak.kerneladiutor.fragments;

import android.content.pm.PackageManager;
import android.os.Build;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.content.ContextCompat;
import android.view.View;
import android.view.ViewTreeObserver;

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

/**
 * Created by willi on 28.12.15.
 */
public abstract class BaseFragment extends Fragment {

    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        try {
            setRetainInstance(true);
        } catch (IllegalStateException ignored) {
        }
    }

    @Override
    public void onViewCreated(final View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        view.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver
                .OnGlobalLayoutListener() {
            public void onGlobalLayout() {
                view.getViewTreeObserver().removeGlobalOnLayoutListener(this);
                onViewFinished();
            }
        });
    }

    public void onViewFinished() {
    }

    public boolean onBackPressed() {
        return false;
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);

        if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
            onPermissionGranted(requestCode);
        } else {
            onPermissionDenied(requestCode);
        }
    }

    public void requestPermission(int request, String... permissions) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            List<String> needrequest = new ArrayList<>();
            for (String permission : permissions) {
                if (ContextCompat.checkSelfPermission(getActivity(), permission)
                        != PackageManager.PERMISSION_GRANTED) {
                    needrequest.add(permission);
                }
            }
            if (needrequest.size() > 0) {
                requestPermissions(needrequest.toArray(new String[needrequest.size()]), request);
                return;
            }
        }
        onPermissionGranted(request);
    }

    public void onPermissionGranted(int request) {
    }

    public void onPermissionDenied(int request) {
    }

}