AboutActivity.java

package com.markzhai.lyrichere.ui;

import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.AppCompatActivity;
import android.view.MenuItem;
import android.widget.TextView;

import com.markzhai.lyrichere.R;


public class AboutActivity extends AppCompatActivity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_about);

        TextView versionTextView = (TextView) findViewById(R.id.about_version_name);
        try {
            PackageInfo pi = this.getPackageManager().getPackageInfo(this.getPackageName(), 0);
            versionTextView.setText(String.format("%s %s", getString(R.string.about_version), pi.versionName));
        } catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
        }
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }
}