change log dialog add

app/src/main/java/code/name/monkey/retromusic/dialogs/ChangelogDialog.java

@@ -0,0 +1 @@
+package code.name.monkey.retromusic.dialogs;

import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.graphics.Color;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.webkit.WebView;

import com.afollestad.materialdialogs.internal.ThemeSingleton;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Objects;

import butterknife.BindView;
import butterknife.ButterKnife;
import code.name.monkey.appthemehelper.util.ATHUtil;
import code.name.monkey.appthemehelper.util.ColorUtil;
import code.name.monkey.retromusic.R;
import code.name.monkey.retromusic.util.PreferenceUtil;
import code.name.monkey.retromusic.views.RoundedBottomSheetDialogFragment;

public class ChangelogDialog extends RoundedBottomSheetDialogFragment {

    @BindView(R.id.web_view)
    WebView webView;

    public static ChangelogDialog create() {
        return new ChangelogDialog();
    }

    public static void setChangelogRead(@NonNull Context context) {
        try {
            PackageInfo pInfo = context.getPackageManager().getPackageInfo(context.getPackageName(), 0);
            int currentVersion = pInfo.versionCode;
            PreferenceUtil.getInstance(context).setLastChangeLogVersion(currentVersion);
        } catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
        }
    }

    private static String colorToHex(int color) {
        return Integer.toHexString(color).substring(2);
    }

    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View layout = inflater.inflate(R.layout.dialog_changelog, container, false);
        ButterKnife.bind(this, layout);
        return layout;
    }

    @Override
    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        try {
            // Load from phonograph-changelog.html in the assets folder
            StringBuilder buf = new StringBuilder();
            InputStream json = Objects.requireNonNull(getActivity()).getAssets().open
                    ("retro-changelog.html");
            BufferedReader in = new BufferedReader(new InputStreamReader(json, "UTF-8"));
            String str;
            while ((str = in.readLine()) != null)
                buf.append(str);
            in.close();

            // Inject color values for WebView body background and links
            final String backgroundColor = colorToHex(ATHUtil.resolveColor(getActivity(), R.attr.md_background_color, Color.parseColor(ThemeSingleton.get().darkTheme ? "#424242" : "#ffffff")));
            final String contentColor = ThemeSingleton.get().darkTheme ? "#ffffff" : "#000000";
            webView.loadData(buf.toString()
                            .replace("{style-placeholder}",
                                    String.format("body { background-color: %s; color: %s; }", backgroundColor, contentColor))
                            .replace("{link-color}", colorToHex(ThemeSingleton.get().positiveColor.getDefaultColor()))
                            .replace("{link-color-active}", colorToHex(ColorUtil.lightenColor(ThemeSingleton.get().positiveColor.getDefaultColor())))
                    , "text/html", "UTF-8");
        } catch (Throwable e) {
            webView.loadData("<h1>Unable to load</h1><p>" + e.getLocalizedMessage() + "</p>", "text/html", "UTF-8");
        }
        setChangelogRead(getActivity());
    }
}