AboutFragment.java

package com.tierep.notificationanalyser.ui;

import android.app.ActionBar;
import android.app.Fragment;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import com.tierep.notificationanalyser.R;


public class AboutFragment extends Fragment {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        ActionBar actionBar = getActivity().getActionBar();
        actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
    }

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        super.onCreateView(inflater, container, savedInstanceState);

        View main = inflater.inflate(R.layout.fragment_about, container, false);

        TextView about_version = (TextView) main.findViewById(R.id.about_version);
        if (about_version.isInEditMode()) {
            about_version.setText("Version 1.0");
        } else {
            try {
                PackageInfo pInfo = getActivity().getPackageManager().getPackageInfo(getActivity().getPackageName(), 0);
                about_version.setText("Version " + pInfo.versionName);
            } catch (PackageManager.NameNotFoundException e) {
                e.printStackTrace();
            }
        }

        return main;
    }
}