chrome/android/webapk/shell_apk/src/org/chromium/webapk/shell_apk/MainActivity.java

// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

package org.chromium.webapk.shell_apk;

import android.app.Activity;
import android.content.ComponentName;
import android.content.Intent;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.util.Base64;
import android.util.Log;

import org.chromium.webapk.lib.common.WebApkConstants;

import java.io.ByteArrayOutputStream;

/**
 * WebAPK's main Activity.
 */
public class MainActivity extends Activity {
    // These EXTRA_* values must stay in sync with
    // {@link org.chromium.chrome.browser.ShortcutHelper}.
    private static final String EXTRA_ID = "org.chromium.chrome.browser.webapp_id";
    private static final String EXTRA_ICON = "org.chromium.chrome.browser.webapp_icon";
    private static final String EXTRA_NAME = "org.chromium.chrome.browser.webapp_name";
    private static final String EXTRA_URL = "org.chromium.chrome.browser.webapp_url";
    private static final String EXTRA_MAC = "org.chromium.chrome.browser.webapp_mac";
    private static final String EXTRA_WEBAPK_PACKAGE_NAME =
            "org.chromium.chrome.browser.webapk_package_name";

    private static final String META_DATA_HOST_URL = "hostUrl";
    private static final String META_DATA_MAC = "mac";
    private static final String META_DATA_RUNTIME_HOST = "runtimeHost";

    private static final String TAG = "cr_MainActivity";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        String packageName = getPackageName();
        String webappId = null;
        String mac = null;
        String name = null;
        String url = null;
        String encodedIcon = null;
        String runtimeHost = null;
        try {
            ApplicationInfo appInfo = getPackageManager().getApplicationInfo(
                    packageName, PackageManager.GET_META_DATA);
            Bundle bundle = appInfo.metaData;
            url = bundle.getString(META_DATA_HOST_URL);

            String overrideUrl = getIntent().getDataString();
            // TODO(pkotwicz): Use same logic as {@code IntentHandler#shouldIgnoreIntent()}
            if (overrideUrl != null && overrideUrl.startsWith("https:")) {
                url = overrideUrl;
            }

            webappId = WebApkConstants.WEBAPK_ID_PREFIX + packageName;
            mac = bundle.getString(META_DATA_MAC);
            runtimeHost = bundle.getString(META_DATA_RUNTIME_HOST);
            name = (String) getPackageManager().getApplicationLabel(appInfo);
            // TODO(hanxi): find a neat solution to avoid encode/decode each time launch the
            // activity.
            Bitmap icon = BitmapFactory.decodeResource(getResources(), R.drawable.app_icon);
            encodedIcon = encodeBitmapAsString(icon);
            Log.w(TAG, "Url of the WebAPK: " + url);
            Log.w(TAG, "WebappId of the WebAPK: " + webappId);
            Log.w(TAG, "Name of the WebAPK:" + name);
            Log.w(TAG, "Package name of the WebAPK:" + packageName);

            Intent newIntent = new Intent();
            newIntent.setComponent(new ComponentName(runtimeHost,
                    "org.chromium.chrome.browser.webapps.WebappLauncherActivity"));
            newIntent.putExtra(EXTRA_ID, webappId)
                     .putExtra(EXTRA_NAME, name)
                     .putExtra(EXTRA_URL, url)
                     .putExtra(EXTRA_MAC, mac)
                     .putExtra(EXTRA_ICON, encodedIcon)
                     .putExtra(EXTRA_WEBAPK_PACKAGE_NAME, packageName);
            startActivity(newIntent);
            finish();
        } catch (NameNotFoundException e) {
            e.printStackTrace();
        }
    }

    /**
     * Compresses a bitmap into a PNG and converts into a Base64 encoded string.
     * The encoded string can be decoded using {@link decodeBitmapFromString(String)}.
     * @param bitmap The Bitmap to compress and encode.
     * @return the String encoding the Bitmap.
     */
    private static String encodeBitmapAsString(Bitmap bitmap) {
        if (bitmap == null) return "";
        ByteArrayOutputStream output = new ByteArrayOutputStream();
        bitmap.compress(Bitmap.CompressFormat.PNG, 100, output);
        return Base64.encodeToString(output.toByteArray(), Base64.DEFAULT);
    }
}