DisPlayWebPageActivity.java

package com.cellasoft.univrapp.activity;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.ViewGroup;
import android.view.Window;
import android.widget.ProgressBar;
import android.widget.Toast;
import com.cellasoft.univrapp.BuildConfig;
import com.cellasoft.univrapp.ConnectivityReceiver;
import com.cellasoft.univrapp.R;
import com.cellasoft.univrapp.exception.UnivrReaderException;
import com.cellasoft.univrapp.manager.ContentManager;
import com.cellasoft.univrapp.model.Item;
import com.cellasoft.univrapp.utils.*;
import com.cellasoft.univrapp.widget.NonLeakingWebView;
import com.github.droidfu.concurrent.BetterAsyncTask;
import com.github.droidfu.concurrent.BetterAsyncTaskCallable;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.List;

import static com.cellasoft.univrapp.utils.LogUtils.LOGD;
import static com.cellasoft.univrapp.utils.LogUtils.makeLogTag;

public class DisPlayWebPageActivity extends Activity {
    public static final String ITEM_ID_PARAM = "ItemId";
    public static final String CHANNEL_ID_PARAM = "ChannelId";
    private static final String TAG = makeLogTag(DisPlayWebPageActivity.class.getName());
    protected volatile boolean running;
    private NonLeakingWebView webView;
    private Item currentItem;
    private String page_url;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        if (BuildConfig.DEBUG) {
            LOGD(TAG, "onCreate()");
            // UIUtils.enableStrictMode();
        }
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.item_webview);

        Intent in = getIntent();
        page_url = in.getStringExtra("page_url");
        int id = in.getIntExtra(ITEM_ID_PARAM, 0);
        currentItem = new Item(id);
        running = true;
        init();
    }

    private void init() {
        webView = (NonLeakingWebView) findViewById(R.id.itemWebView);
        webView.setProgressBar((ProgressBar) findViewById(R.id.progressBar));

        UIUtils.setHardwareAccelerated(this, webView, true);
        UIUtils.keepScreenOn(this, true);
    }

    @Override
    protected void onPostCreate(Bundle savedInstanceState) {
        FontUtils.setRobotoFont(this, (ViewGroup) getWindow().getDecorView());
        super.onPostCreate(savedInstanceState);
    }

    @Override
    protected void onStart() {
        if (BuildConfig.DEBUG) {
            LOGD(TAG, "onStart()");
        }
        super.onStart();
        loadPage();
    }

    @Override
    protected void onStop() {
        if (BuildConfig.DEBUG) {
            LOGD(TAG, "onStop()");
        }

        webView.stopLoading();
        webView.clearCache(false);
        webView.freeMemory();
        super.onStop();
    }

    @Override
    protected void onDestroy() {
        if (BuildConfig.DEBUG) {
            LOGD(TAG, "onDestroy()");
        }
        running = false;
        UIUtils.unbindWebView(webView);
        currentItem = null;
        super.onDestroy();
    }

    private void loadPage() {
        BetterAsyncTask<Void, Void, String> task = new BetterAsyncTask<Void, Void, String>(
                this) {

            @Override
            protected void after(final Context context, final String html) {
                if (running) {
                    runOnUiThread(new Runnable() {
                        public void run() {
                            try {
                                webView.showArticle(html);
                            } catch (Exception e) {
                                handleError(
                                        context,
                                        new Exception(
                                                "Errore durante la visualizzazione! Segnala il bug!"));
                            }
                        }
                    });
                }
            }

            @Override
            protected void handleError(Context context, Exception e) {
                Toast.makeText(context, e.getMessage(), Toast.LENGTH_SHORT)
                        .show();
                finish();
            }
        };
        task.setCallable(new BetterAsyncTaskCallable<Void, Void, String>() {

            @Override
            public String call(BetterAsyncTask<Void, Void, String> task)
                    throws Exception {
                if (ConnectivityReceiver.hasGoodEnoughNetworkConnection()) {
                    currentItem = Item.findItemById(currentItem.id,
                            ContentManager.FULL_ITEM_LOADER);

                    String html = StreamUtils.readFromUrl(page_url);
                    return modifyHtml(html);
                } else
                    throw new UnivrReaderException(getResources().getString(
                            R.string.univrapp_connection_exception));
            }
        });
        task.disableDialog();

        UIUtils.execute(task, (Void[]) null);
    }

    @Override
    public void onBackPressed() {
        finish();
    }

    private String modifyHtml(String html) {
        DateFormat dateFormat = new SimpleDateFormat(
                "dd MMMM yyyy 'alle' HH:mm", java.util.Locale.getDefault());
        String article = FileUtils.getFileFromAssets(getApplicationContext(),
                "article.html");

        article = article.replace("{content}", Html.parserPage(html))
                .replace("{title_url}", currentItem.link)
                .replace("{title}", currentItem.title)
                .replace("{date}", dateFormat.format(currentItem.pubDate));

        List<String> files = Html.getAttachment(html);
        if (!files.isEmpty()) {
            Document doc = Jsoup.parse(article);
            doc.select("div#attachment").removeAttr("style");
            article = doc.html();
            StringBuilder attach = new StringBuilder();
            for (String file : files) {
                attach.append("<tr>")
                        .append("<td><img style=\"width: 100%;\" src=\"attachment.png\" /></td>")
                        .append("<td>" + file + "</td>").append("</tr>");
            }

            files.clear();
            article = article.replace("{files}", attach.toString());
        }

        return article;
    }
}