Android/app/src/main/java/protect/card_locker/AboutContent.java

package protect.card_locker;

import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.text.Spanned;
import android.util.Log;

import androidx.core.text.HtmlCompat;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.List;

public class AboutContent {

    public static final String TAG = "Catima";

    public Context context;

    public AboutContent(Context context) {
        this.context = context;
    }

    public void destroy() {
        this.context = null;
    }

    public String getPageTitle() {
        return String.format(context.getString(R.string.about_title_fmt), context.getString(R.string.app_name));
    }

    public String getAppVersion() {
        String version = "?";
        try {
            PackageInfo pi = context.getPackageManager().getPackageInfo(context.getPackageName(), 0);
            version = pi.versionName;
        } catch (PackageManager.NameNotFoundException e) {
            Log.w(TAG, "Package name not found", e);
        }

        return version;
    }

    public int getCurrentYear() {
        return Calendar.getInstance().get(Calendar.YEAR);
    }

    public String getCopyright() {
        return String.format(context.getString(R.string.app_copyright_fmt), getCurrentYear());
    }

    public String getCopyrightShort() {
        return context.getString(R.string.app_copyright_short);
    }

    public String getContributors() {
        String contributors;
        try {
            contributors = "<br/>" + Utils.readTextFile(context, R.raw.contributors);
        }  catch (IOException ignored) {
            return "";
        }
        return contributors.replace("\n", "<br />");
    }

    public String getHistory() {
        String versionHistory;
        try {
            versionHistory = Utils.readTextFile(context, R.raw.changelog)
                    .replace("# Changelog\n\n", "");
        }  catch (IOException ignored) {
            return "";
        }
        return Utils.linkify(Utils.basicMDToHTML(versionHistory))
                .replace("\n", "<br />");
    }

    public String getLicense() {
        try {
            return Utils.readTextFile(context, R.raw.license);
        }  catch (IOException ignored) {
            return "";
        }
    }

    public String getPrivacy() {
        String privacyPolicy;
        try {
            privacyPolicy = Utils.readTextFile(context, R.raw.privacy)
                    .replace("# Privacy Policy\n", "");
        }  catch (IOException ignored) {
            return "";
        }
        return Utils.linkify(Utils.basicMDToHTML(privacyPolicy))
                .replace("\n", "<br />");
    }

    public String getThirdPartyLibraries() {
        final List<ThirdPartyInfo> usedLibraries = new ArrayList<>();
        usedLibraries.add(new ThirdPartyInfo("ACRA", "https://github.com/ACRA/acra", "Apache 2.0"));
        usedLibraries.add(new ThirdPartyInfo("Color Picker", "https://github.com/jaredrummler/ColorPicker", "Apache 2.0"));
        usedLibraries.add(new ThirdPartyInfo("Commons CSV", "https://commons.apache.org/proper/commons-csv/", "Apache 2.0"));
        usedLibraries.add(new ThirdPartyInfo("uCrop", "https://github.com/Yalantis/uCrop", "Apache 2.0"));
        usedLibraries.add(new ThirdPartyInfo("Zip4j", "https://github.com/srikanth-lingala/zip4j", "Apache 2.0"));
        usedLibraries.add(new ThirdPartyInfo("ZXing", "https://github.com/zxing/zxing", "Apache 2.0"));
        usedLibraries.add(new ThirdPartyInfo("ZXing Android Embedded", "https://github.com/journeyapps/zxing-android-embedded", "Apache 2.0"));

        StringBuilder result = new StringBuilder("<br/>");
        for (ThirdPartyInfo entry : usedLibraries) {
            result.append("<br/>")
                .append(entry.toHtml());
        }

        return result.toString();
    }

    public String getUsedThirdPartyAssets() {
        final List<ThirdPartyInfo> usedAssets = new ArrayList<>();
        usedAssets.add(new ThirdPartyInfo("Android icons", "https://fonts.google.com/icons?selected=Material+Icons", "Apache 2.0"));

        StringBuilder result = new StringBuilder().append("<br/>");
        for (ThirdPartyInfo entry : usedAssets) {
            result.append("<br/>")
                    .append(entry.toHtml());
        }

        return result.toString();
    }

    public Spanned getContributorInfo() {
        StringBuilder contributorInfo = new StringBuilder();
        contributorInfo.append(getCopyright());
        contributorInfo.append("<br/><br/>");
        contributorInfo.append(context.getString(R.string.app_copyright_old));
        contributorInfo.append("<br/><br/>");
        contributorInfo.append(String.format(context.getString(R.string.app_contributors), getContributors()));
        contributorInfo.append("<br/><br/>");
        contributorInfo.append(String.format(context.getString(R.string.app_libraries), getThirdPartyLibraries()));
        contributorInfo.append("<br/><br/>");
        contributorInfo.append(String.format(context.getString(R.string.app_resources), getUsedThirdPartyAssets()));

        return HtmlCompat.fromHtml(contributorInfo.toString(), HtmlCompat.FROM_HTML_MODE_COMPACT);
    }

    public Spanned getHistoryInfo() {
        return HtmlCompat.fromHtml(getHistory(), HtmlCompat.FROM_HTML_MODE_COMPACT);
    }

    public Spanned getLicenseInfo() {
        return HtmlCompat.fromHtml(getLicense(), HtmlCompat.FROM_HTML_MODE_LEGACY);
    }

    public Spanned getPrivacyInfo() {
        return HtmlCompat.fromHtml(getPrivacy(), HtmlCompat.FROM_HTML_MODE_COMPACT);
    }

    public String getVersionHistory() {
        return String.format(context.getString(R.string.debug_version_fmt), getAppVersion());
    }
}