AboutActivity.java

package org.onebusaway.android.ui;

import org.onebusaway.android.R;
import org.onebusaway.android.io.ObaAnalytics;

import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.support.design.widget.CollapsingToolbarLayout;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.widget.TextView;

/**
 * An Activity that displays version, license, and contributor information
 */
public class AboutActivity extends AppCompatActivity {

    public static void start(Context context) {
        Intent intent = new Intent(context, AboutActivity.class);
        context.startActivity(intent);
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_about);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        CollapsingToolbarLayout toolBarLayout = (CollapsingToolbarLayout) findViewById(
                R.id.toolbar_layout);
        toolBarLayout.setTitle(getTitle());

        getSupportActionBar().setDisplayHomeAsUpEnabled(true);

        TextView tv = (TextView) findViewById(R.id.about_text);
        String versionString = "";
        int versionCode = 0;
        try {
            PackageInfo info = getPackageManager().getPackageInfo(getPackageName(), 0);
            versionString = info.versionName;
            versionCode = info.versionCode;
        } catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
        }

        StringBuilder builder = new StringBuilder();
        // Version info
        builder.append("v")
                .append(versionString)
                .append(" (")
                .append(versionCode)
                .append(")\n\n");

        // Majority of content from string resource
        builder.append(getString(R.string.about_text));
        builder.append("\n\n");

        tv.setText(builder.toString());
    }

    @Override
    protected void onStart() {
        super.onStart();
        ObaAnalytics.reportActivityStart(this);
    }
}