android.app.ActivityManager.RecentTaskInfo#org.chromium.chrome.browser.document.ChromeLauncherActivity源码实例Demo

private static void openUrl(Activity activity, String url, ComponentName componentName) {
    Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
    intent.putExtra(Browser.EXTRA_APPLICATION_ID,
            activity.getApplicationContext().getPackageName());
    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

    if (componentName != null) {
        intent.setComponent(componentName);
    } else {
        // If the bookmark manager is shown in a tab on a phone (rather than in a separate
        // activity) the component name may be null. Send the intent through
        // ChromeLauncherActivity instead to avoid crashing. See crbug.com/615012.
        intent.setClass(activity, ChromeLauncherActivity.class);
    }

    IntentHandler.startActivityForTrustedIntent(intent, activity);
}
 

private Intent createNewTabIntent(AsyncTabCreationParams asyncParams, int parentId) {
    int assignedTabId = TabIdManager.getInstance().generateValidId(Tab.INVALID_TAB_ID);
    AsyncTabParamsManager.add(assignedTabId, asyncParams);

    Intent intent = new Intent(
            Intent.ACTION_VIEW, Uri.parse(asyncParams.getLoadUrlParams().getUrl()));
    intent.setClass(ContextUtils.getApplicationContext(), ChromeLauncherActivity.class);
    intent.putExtra(IntentHandler.EXTRA_TAB_ID, assignedTabId);
    intent.putExtra(IntentHandler.EXTRA_OPEN_NEW_INCOGNITO_TAB, mIsIncognito);
    intent.putExtra(IntentHandler.EXTRA_PARENT_TAB_ID, parentId);

    Activity parentActivity = ActivityDelegate.getActivityForTabId(parentId);
    if (parentActivity != null && parentActivity.getIntent() != null) {
        intent.putExtra(IntentHandler.EXTRA_PARENT_INTENT, parentActivity.getIntent());
    }

    if (asyncParams.getRequestId() != null) {
        intent.putExtra(ServiceTabLauncher.LAUNCH_REQUEST_ID_EXTRA,
                asyncParams.getRequestId().intValue());
    }

    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    return intent;
}
 

@TargetApi(Build.VERSION_CODES.LOLLIPOP)
private void removeNonVisibleChromeTabbedRecentEntries() {
    Set<Integer> visibleTaskIds = getTaskIdsForVisibleActivities();

    Context context = ContextUtils.getApplicationContext();
    ActivityManager manager =
            (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
    PackageManager pm = getPackageManager();

    for (AppTask task : manager.getAppTasks()) {
        RecentTaskInfo info = DocumentUtils.getTaskInfoFromTask(task);
        if (info == null) continue;
        String className = DocumentUtils.getTaskClassName(task, pm);

        // It is not easily possible to distinguish between tasks sitting on top of
        // ChromeLauncherActivity, so we treat them all as likely ChromeTabbedActivities and
        // close them to be on the cautious side of things.
        if ((TextUtils.equals(className, ChromeTabbedActivity.class.getName())
                || TextUtils.equals(className, ChromeLauncherActivity.class.getName()))
                && !visibleTaskIds.contains(info.id)) {
            task.finishAndRemoveTask();
        }
    }
}
 

/**
 * Updates |mIntentHistory| and |mLastIntentUpdatedTime|. If |intent| comes from chrome and
 * currently |mIsOnEffectiveIntentRedirectChain| is true, that means |intent| was sent from
 * this tab because only the front tab or a new tab can receive an intent from chrome. In that
 * case, |intent| is added to |mIntentHistory|.
 * Otherwise, |mIntentHistory| and |mPreviousResolvers| are cleared, and then |intent| is put
 * into |mIntentHistory|.
 */
public void updateIntent(Intent intent) {
    clear();

    if (mContext == null || intent == null || !Intent.ACTION_VIEW.equals(intent.getAction())) {
        return;
    }

    String chromePackageName = mContext.getPackageName();
    // If an intent is heading explicitly to Chrome, we should stay in Chrome.
    if (TextUtils.equals(chromePackageName, intent.getPackage())
            || TextUtils.equals(chromePackageName, IntentUtils.safeGetStringExtra(intent,
                    Browser.EXTRA_APPLICATION_ID))) {
        mIsInitialIntentHeadingToChrome = true;
    }
    mIsCustomTabIntent = ChromeLauncherActivity.isCustomTabIntent(intent);

    // Copies minimum information to retrieve resolvers.
    mInitialIntent = new Intent(Intent.ACTION_VIEW);
    mInitialIntent.setData(intent.getData());
    if (intent.getCategories() != null) {
        for (String category : intent.getCategories()) {
            mInitialIntent.addCategory(category);
        }
    }
}
 

private static void openUrl(Activity activity, String url, ComponentName componentName) {
    Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
    intent.putExtra(Browser.EXTRA_APPLICATION_ID,
            activity.getApplicationContext().getPackageName());
    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    intent.putExtra(IntentHandler.EXTRA_PAGE_TRANSITION_TYPE, PageTransition.AUTO_BOOKMARK);

    if (componentName != null) {
        intent.setComponent(componentName);
    } else {
        // If the bookmark manager is shown in a tab on a phone (rather than in a separate
        // activity) the component name may be null. Send the intent through
        // ChromeLauncherActivity instead to avoid crashing. See crbug.com/615012.
        intent.setClass(activity, ChromeLauncherActivity.class);
    }

    IntentHandler.startActivityForTrustedIntent(intent, activity);
}
 

@TargetApi(Build.VERSION_CODES.LOLLIPOP)
private void removeNonVisibleChromeTabbedRecentEntries() {
    Set<Integer> visibleTaskIds = getTaskIdsForVisibleActivities();

    Context context = ContextUtils.getApplicationContext();
    ActivityManager manager =
            (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
    PackageManager pm = getPackageManager();

    for (AppTask task : manager.getAppTasks()) {
        RecentTaskInfo info = DocumentUtils.getTaskInfoFromTask(task);
        if (info == null) continue;
        String className = DocumentUtils.getTaskClassName(task, pm);

        // It is not easily possible to distinguish between tasks sitting on top of
        // ChromeLauncherActivity, so we treat them all as likely ChromeTabbedActivities and
        // close them to be on the cautious side of things.
        if ((TextUtils.equals(className, ChromeTabbedActivity.class.getName())
                || TextUtils.equals(className, ChromeLauncherActivity.class.getName()))
                && !visibleTaskIds.contains(info.id)) {
            task.finishAndRemoveTask();
        }
    }
}
 

@Override
public boolean maybeLaunchInstantApp(Tab tab, String url, String referrerUrl,
        boolean isIncomingRedirect) {
    if (tab == null || tab.getWebContents() == null) return false;

    InstantAppsHandler handler = InstantAppsHandler.getInstance();
    Intent intent = tab.getTabRedirectHandler() != null
            ? tab.getTabRedirectHandler().getInitialIntent() : null;
    // TODO(mariakhomenko): consider also handling NDEF_DISCOVER action redirects.
    if (isIncomingRedirect && intent != null && intent.getAction() == Intent.ACTION_VIEW) {
        // Set the URL the redirect was resolved to for checking the existence of the
        // instant app inside handleIncomingIntent().
        Intent resolvedIntent = new Intent(intent);
        resolvedIntent.setData(Uri.parse(url));
        return handler.handleIncomingIntent(getAvailableContext(), resolvedIntent,
                ChromeLauncherActivity.isCustomTabIntent(resolvedIntent));
    } else if (!isIncomingRedirect) {
        // Check if the navigation is coming from SERP and skip instant app handling.
        if (isSerpReferrer(referrerUrl, tab)) return false;
        return handler.handleNavigation(
                getAvailableContext(), url,
                TextUtils.isEmpty(referrerUrl) ? null : Uri.parse(referrerUrl),
                tab.getWebContents());
    }
    return false;
}
 

@Override
public void loadUrl(String url) {
    // Wait until native has loaded.
    if (!mIsActivityUsable) {
        mQueuedUrl = url;
        return;
    }

    // Don't do anything if the input was empty. This is done after the native check to prevent
    // resending a queued query after the user deleted it.
    if (TextUtils.isEmpty(url)) return;

    // Fix up the URL and send it to the full browser.
    String fixedUrl = UrlFormatter.fixupUrl(url);
    Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(fixedUrl));
    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_NEW_DOCUMENT);
    intent.setClass(this, ChromeLauncherActivity.class);
    IntentHandler.addTrustedIntentExtras(intent);
    IntentUtils.safeStartActivity(this, intent,
            ActivityOptionsCompat
                    .makeCustomAnimation(this, android.R.anim.fade_in, android.R.anim.fade_out)
                    .toBundle());
    RecordUserAction.record("SearchWidget.SearchMade");
    finish();
}
 

private static void openUrl(Activity activity, String url, ComponentName componentName) {
    Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
    intent.putExtra(Browser.EXTRA_APPLICATION_ID,
            activity.getApplicationContext().getPackageName());
    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    intent.putExtra(IntentHandler.EXTRA_PAGE_TRANSITION_TYPE, PageTransition.AUTO_BOOKMARK);

    if (componentName != null) {
        intent.setComponent(componentName);
    } else {
        // If the bookmark manager is shown in a tab on a phone (rather than in a separate
        // activity) the component name may be null. Send the intent through
        // ChromeLauncherActivity instead to avoid crashing. See crbug.com/615012.
        intent.setClass(activity, ChromeLauncherActivity.class);
    }

    IntentHandler.startActivityForTrustedIntent(intent);
}
 

@TargetApi(Build.VERSION_CODES.LOLLIPOP)
private void removeNonVisibleChromeTabbedRecentEntries() {
    Set<Integer> visibleTaskIds = getTaskIdsForVisibleActivities();

    Context context = ContextUtils.getApplicationContext();
    ActivityManager manager =
            (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
    PackageManager pm = getPackageManager();

    for (AppTask task : manager.getAppTasks()) {
        RecentTaskInfo info = DocumentUtils.getTaskInfoFromTask(task);
        if (info == null) continue;
        String className = DocumentUtils.getTaskClassName(task, pm);

        // It is not easily possible to distinguish between tasks sitting on top of
        // ChromeLauncherActivity, so we treat them all as likely ChromeTabbedActivities and
        // close them to be on the cautious side of things.
        if ((ChromeTabbedActivity.isTabbedModeClassName(className)
                || TextUtils.equals(className, ChromeLauncherActivity.class.getName()))
                && !visibleTaskIds.contains(info.id)) {
            task.finishAndRemoveTask();
        }
    }
}
 

@Override
public boolean maybeLaunchInstantApp(Tab tab, String url, String referrerUrl,
        boolean isIncomingRedirect) {
    if (tab == null || tab.getWebContents() == null) return false;

    InstantAppsHandler handler = InstantAppsHandler.getInstance();
    Intent intent = tab.getTabRedirectHandler() != null
            ? tab.getTabRedirectHandler().getInitialIntent() : null;
    // TODO(mariakhomenko): consider also handling NDEF_DISCOVER action redirects.
    if (isIncomingRedirect && intent != null && Intent.ACTION_VIEW.equals(intent.getAction())) {
        // Set the URL the redirect was resolved to for checking the existence of the
        // instant app inside handleIncomingIntent().
        Intent resolvedIntent = new Intent(intent);
        resolvedIntent.setData(Uri.parse(url));
        return handler.handleIncomingIntent(getAvailableContext(), resolvedIntent,
                ChromeLauncherActivity.isCustomTabIntent(resolvedIntent), true);
    } else if (!isIncomingRedirect) {
        // Check if the navigation is coming from SERP and skip instant app handling.
        if (isSerpReferrer(tab)) return false;
        return handler.handleNavigation(getAvailableContext(), url,
                TextUtils.isEmpty(referrerUrl) ? null : Uri.parse(referrerUrl), tab);
    }
    return false;
}
 

/**
 * Opens a new Tab with the possibility of showing it in a Custom Tab, instead.
 *
 * See IntentHandler#processUrlViewIntent() for an explanation most of the parameters.
 * @param forceNewTab If not handled by a Custom Tab, forces the new tab to be created.
 */
private void openNewTab(String url, String referer, String headers,
        String externalAppId, Intent intent, boolean forceNewTab) {
    boolean isAllowedToReturnToExternalApp = IntentUtils.safeGetBooleanExtra(intent,
            ChromeLauncherActivity.EXTRA_IS_ALLOWED_TO_RETURN_TO_PARENT, true);

    String herbFlavor = FeatureUtilities.getHerbFlavor();
    if (isAllowedToReturnToExternalApp
            && ChromeLauncherActivity.canBeHijackedByHerb(intent)
            && TextUtils.equals(ChromeSwitches.HERB_FLAVOR_DILL, herbFlavor)) {
        Log.d(TAG, "Sending to CustomTabActivity");
        mActivityStopMetrics.setStopReason(
                ActivityStopMetrics.STOP_REASON_CUSTOM_TAB_STARTED);

        Intent newIntent = ChromeLauncherActivity.createCustomTabActivityIntent(
                ChromeTabbedActivity.this, intent, false);
        newIntent.putExtra(Browser.EXTRA_APPLICATION_ID, getPackageName());
        newIntent.putExtra(
                CustomTabIntentDataProvider.EXTRA_IS_OPENED_BY_CHROME, true);
        ChromeLauncherActivity.updateHerbIntent(ChromeTabbedActivity.this,
                newIntent, Uri.parse(IntentHandler.getUrlFromIntent(newIntent)));

        // Launch the Activity on top of this task.
        int updatedFlags = newIntent.getFlags();
        updatedFlags &= ~Intent.FLAG_ACTIVITY_NEW_TASK;
        updatedFlags &= ~Intent.FLAG_ACTIVITY_NEW_DOCUMENT;
        newIntent.setFlags(updatedFlags);
        startActivityForResult(newIntent, CCT_RESULT);
    } else {
        // Create a new tab.
        Tab newTab =
                launchIntent(url, referer, headers, externalAppId, forceNewTab, intent);
        newTab.setIsAllowedToReturnToExternalApp(isAllowedToReturnToExternalApp);
        RecordUserAction.record("MobileReceivedExternalIntent");
    }
}
 

@Override
public void onReceive(Context context, Intent intent) {
    if (BookmarkWidgetService.getChangeFolderAction(context)
            .equals(intent.getAction())) {
        BookmarkWidgetService.changeFolder(context, intent);
    } else {
        Intent view = new Intent(intent);
        view.setClass(context, ChromeLauncherActivity.class);
        view.putExtra(ShortcutHelper.EXTRA_SOURCE, ShortcutSource.BOOKMARK_NAVIGATOR_WIDGET);
        view.putExtra(ShortcutHelper.REUSE_URL_MATCHING_TAB_ELSE_NEW_TAB, true);
        startActivity(context, view);
    }
}
 

/**
 * @param activity The {@link Activity} to check.
 * @return Whether or not {@code activity} should run in pre-N Samsung multi-instance mode.
 */
public boolean shouldRunInLegacyMultiInstanceMode(ChromeLauncherActivity activity) {
    return Build.VERSION.SDK_INT > Build.VERSION_CODES.LOLLIPOP
            && TextUtils.equals(activity.getIntent().getAction(), Intent.ACTION_MAIN)
            && isLegacyMultiWindow(activity)
            && activity.isChromeBrowserActivityRunning();
}
 

/**
 * Makes |intent| able to support multi-instance in pre-N Samsung multi-window mode.
 */
@TargetApi(Build.VERSION_CODES.LOLLIPOP)
public void makeLegacyMultiInstanceIntent(ChromeLauncherActivity activity, Intent intent) {
    if (isLegacyMultiWindow(activity)) {
        if (TextUtils.equals(ChromeTabbedActivity.class.getName(),
                intent.getComponent().getClassName())) {
            intent.setClassName(activity, MultiInstanceChromeTabbedActivity.class.getName());
        }
        intent.setFlags(intent.getFlags()
                & ~(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_NEW_DOCUMENT));
    }
}
 

/**
 * Opens a new Tab with the possibility of showing it in a Custom Tab, instead.
 *
 * See IntentHandler#processUrlViewIntent() for an explanation most of the parameters.
 * @param forceNewTab If not handled by a Custom Tab, forces the new tab to be created.
 */
private void openNewTab(String url, String referer, String headers,
        String externalAppId, Intent intent, boolean forceNewTab) {
    boolean isAllowedToReturnToExternalApp = IntentUtils.safeGetBooleanExtra(intent,
            ChromeLauncherActivity.EXTRA_IS_ALLOWED_TO_RETURN_TO_PARENT, true);

    // Create a new tab.
    Tab newTab =
            launchIntent(url, referer, headers, externalAppId, forceNewTab, intent);
    newTab.setIsAllowedToReturnToExternalApp(isAllowedToReturnToExternalApp);
    logMobileReceivedExternalIntent(externalAppId, intent);
}
 

@Override
public void onReceive(Context context, Intent intent) {
    if (BookmarkWidgetService.getChangeFolderAction(context)
            .equals(intent.getAction())) {
        BookmarkWidgetService.changeFolder(context, intent);
    } else {
        Intent view = new Intent(intent);
        view.setClass(context, ChromeLauncherActivity.class);
        view.putExtra(ShortcutHelper.EXTRA_SOURCE, ShortcutSource.BOOKMARK_NAVIGATOR_WIDGET);
        view.putExtra(ShortcutHelper.REUSE_URL_MATCHING_TAB_ELSE_NEW_TAB, true);
        startActivity(context, view);
    }
}
 

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

    String intentAction = getIntent().getAction();

    // Exit early if the original intent action isn't for opening a new tab.
    if (!intentAction.equals(ACTION_OPEN_NEW_TAB)
            && !intentAction.equals(ACTION_OPEN_NEW_INCOGNITO_TAB)) {
        finish();
        return;
    }

    Intent newIntent = new Intent();
    newIntent.setAction(Intent.ACTION_VIEW);
    newIntent.setData(Uri.parse(UrlConstants.NTP_URL));
    newIntent.setClass(this, ChromeLauncherActivity.class);
    newIntent.putExtra(IntentHandler.EXTRA_INVOKED_FROM_SHORTCUT, true);
    newIntent.putExtra(Browser.EXTRA_CREATE_NEW_TAB, true);
    newIntent.putExtra(Browser.EXTRA_APPLICATION_ID, getPackageName());
    IntentHandler.addTrustedIntentExtras(newIntent, this);

    if (intentAction.equals(ACTION_OPEN_NEW_INCOGNITO_TAB)) {
        newIntent.putExtra(IntentHandler.EXTRA_OPEN_NEW_INCOGNITO_TAB, true);
    }

    // This system call is often modified by OEMs and not actionable. http://crbug.com/619646.
    StrictMode.ThreadPolicy oldPolicy = StrictMode.allowThreadDiskReads();
    StrictMode.allowThreadDiskWrites();
    try {
        startActivity(newIntent);
    } finally {
        StrictMode.setThreadPolicy(oldPolicy);
    }

    finish();
}
 

/**
 * @param activity The {@link Activity} to check.
 * @return Whether or not {@code activity} should run in pre-N Samsung multi-instance mode.
 */
public boolean shouldRunInLegacyMultiInstanceMode(ChromeLauncherActivity activity) {
    return Build.VERSION.SDK_INT > Build.VERSION_CODES.LOLLIPOP
            && TextUtils.equals(activity.getIntent().getAction(), Intent.ACTION_MAIN)
            && isLegacyMultiWindow(activity)
            && activity.isChromeBrowserActivityRunning();
}
 

/**
 * Makes |intent| able to support multi-instance in pre-N Samsung multi-window mode.
 */
@TargetApi(Build.VERSION_CODES.LOLLIPOP)
public void makeLegacyMultiInstanceIntent(ChromeLauncherActivity activity, Intent intent) {
    if (isLegacyMultiWindow(activity)) {
        if (TextUtils.equals(ChromeTabbedActivity.class.getName(),
                intent.getComponent().getClassName())) {
            intent.setClassName(activity, MultiInstanceChromeTabbedActivity.class.getName());
        }
        intent.setFlags(intent.getFlags()
                & ~(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_NEW_DOCUMENT));
    }
}
 

/**
 * Updates |mIntentHistory| and |mLastIntentUpdatedTime|. If |intent| comes from chrome and
 * currently |mIsOnEffectiveIntentRedirectChain| is true, that means |intent| was sent from
 * this tab because only the front tab or a new tab can receive an intent from chrome. In that
 * case, |intent| is added to |mIntentHistory|.
 * Otherwise, |mIntentHistory| and |mPreviousResolvers| are cleared, and then |intent| is put
 * into |mIntentHistory|.
 */
public void updateIntent(Intent intent) {
    clear();

    if (mContext == null || intent == null || !Intent.ACTION_VIEW.equals(intent.getAction())) {
        return;
    }

    mIsCustomTabIntent = ChromeLauncherActivity.isCustomTabIntent(intent);
    boolean checkIsToChrome = true;
    // All custom tabs VIEW intents are by design explicit intents, so the presence of package
    // name doesn't imply they have to be handled by Chrome explicitly. Check if external apps
    // should be checked for handling the initial redirect chain.
    if (mIsCustomTabIntent) {
        boolean sendToExternalApps = IntentUtils.safeGetBooleanExtra(intent,
                CustomTabIntentDataProvider.EXTRA_SEND_TO_EXTERNAL_DEFAULT_HANDLER, false);
        checkIsToChrome = !(sendToExternalApps
                && ChromeFeatureList.isEnabled(ChromeFeatureList.CCT_EXTERNAL_LINK_HANDLING));
    }

    if (checkIsToChrome) mIsInitialIntentHeadingToChrome = isIntentToChrome(mContext, intent);

    // A copy of the intent with component cleared to find resolvers.
    mInitialIntent = new Intent(intent).setComponent(null);
    Intent selector = mInitialIntent.getSelector();
    if (selector != null) selector.setComponent(null);
}
 

@Override
public void onReceive(Context context, Intent intent) {
    if (BookmarkWidgetService.getChangeFolderAction(context)
            .equals(intent.getAction())) {
        BookmarkWidgetService.changeFolder(context, intent);
    } else {
        Intent view = new Intent(intent);
        view.setClass(context, ChromeLauncherActivity.class);
        view.putExtra(ShortcutHelper.EXTRA_SOURCE, ShortcutSource.BOOKMARK_NAVIGATOR_WIDGET);
        view.putExtra(ShortcutHelper.REUSE_URL_MATCHING_TAB_ELSE_NEW_TAB, true);
        startActivity(context, view);
    }
}
 

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

    String intentAction = getIntent().getAction();

    // Exit early if the original intent action isn't for opening a new tab.
    if (!intentAction.equals(ACTION_OPEN_NEW_TAB)
            && !intentAction.equals(ACTION_OPEN_NEW_INCOGNITO_TAB)) {
        finish();
        return;
    }

    Intent newIntent = new Intent();
    newIntent.setAction(Intent.ACTION_VIEW);
    newIntent.setData(Uri.parse(UrlConstants.NTP_URL));
    newIntent.setClass(this, ChromeLauncherActivity.class);
    newIntent.putExtra(IntentHandler.EXTRA_INVOKED_FROM_SHORTCUT, true);
    newIntent.putExtra(Browser.EXTRA_CREATE_NEW_TAB, true);
    newIntent.putExtra(Browser.EXTRA_APPLICATION_ID, getPackageName());
    IntentHandler.addTrustedIntentExtras(newIntent);

    if (intentAction.equals(ACTION_OPEN_NEW_INCOGNITO_TAB)) {
        newIntent.putExtra(IntentHandler.EXTRA_OPEN_NEW_INCOGNITO_TAB, true);
    }

    // This system call is often modified by OEMs and not actionable. http://crbug.com/619646.
    StrictMode.ThreadPolicy oldPolicy = StrictMode.allowThreadDiskWrites();
    try {
        startActivity(newIntent);
    } finally {
        StrictMode.setThreadPolicy(oldPolicy);
    }

    finish();
}
 

/**
 * @param activity The {@link Activity} to check.
 * @return Whether or not {@code activity} should run in pre-N Samsung multi-instance mode.
 */
public boolean shouldRunInLegacyMultiInstanceMode(ChromeLauncherActivity activity) {
    return Build.VERSION.SDK_INT > Build.VERSION_CODES.LOLLIPOP
            && TextUtils.equals(activity.getIntent().getAction(), Intent.ACTION_MAIN)
            && isLegacyMultiWindow(activity)
            && activity.isChromeBrowserActivityRunning();
}
 

/**
 * Makes |intent| able to support multi-instance in pre-N Samsung multi-window mode.
 */
@TargetApi(Build.VERSION_CODES.LOLLIPOP)
public void makeLegacyMultiInstanceIntent(ChromeLauncherActivity activity, Intent intent) {
    if (isLegacyMultiWindow(activity)) {
        if (TextUtils.equals(ChromeTabbedActivity.class.getName(),
                intent.getComponent().getClassName())) {
            intent.setClassName(activity, MultiInstanceChromeTabbedActivity.class.getName());
        }
        intent.setFlags(intent.getFlags()
                & ~(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_NEW_DOCUMENT));
    }
}
 

private static void openUrl(Uri uri) {
    Context context = ContextUtils.getApplicationContext();
    Intent intent = new Intent()
                            .setAction(Intent.ACTION_VIEW)
                            .setData(uri)
                            .setClass(context, ChromeLauncherActivity.class)
                            .addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
                            .putExtra(Browser.EXTRA_APPLICATION_ID, context.getPackageName())
                            .putExtra(ShortcutHelper.REUSE_URL_MATCHING_TAB_ELSE_NEW_TAB, true);
    IntentHandler.addTrustedIntentExtras(intent);
    context.startActivity(intent);
}
 

@Override
public void onOpenInNewChromeTabFromCCT(String linkUrl, boolean isIncognito) {
    Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(linkUrl));
    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    intent.setClass(mTab.getApplicationContext(), ChromeLauncherActivity.class);
    intent.putExtra(ChromeLauncherActivity.EXTRA_IS_ALLOWED_TO_RETURN_TO_PARENT, false);
    if (isIncognito) {
        intent.putExtra(IntentHandler.EXTRA_OPEN_NEW_INCOGNITO_TAB, true);
        intent.putExtra(
                Browser.EXTRA_APPLICATION_ID, mTab.getApplicationContext().getPackageName());
        IntentHandler.addTrustedIntentExtras(intent);
        IntentHandler.setTabLaunchType(intent, TabLaunchType.FROM_EXTERNAL_APP);
    }
    IntentUtils.safeStartActivity(mTab.getActivity(), intent);
}
 

/**
 * Updates |mIntentHistory| and |mLastIntentUpdatedTime|. If |intent| comes from chrome and
 * currently |mIsOnEffectiveIntentRedirectChain| is true, that means |intent| was sent from
 * this tab because only the front tab or a new tab can receive an intent from chrome. In that
 * case, |intent| is added to |mIntentHistory|.
 * Otherwise, |mIntentHistory| and |mPreviousResolvers| are cleared, and then |intent| is put
 * into |mIntentHistory|.
 */
public void updateIntent(Intent intent) {
    clear();

    if (mContext == null || intent == null || !Intent.ACTION_VIEW.equals(intent.getAction())) {
        return;
    }

    mIsCustomTabIntent = ChromeLauncherActivity.isCustomTabIntent(intent);
    boolean checkIsToChrome = true;
    // All custom tabs VIEW intents are by design explicit intents, so the presence of package
    // name doesn't imply they have to be handled by Chrome explicitly. Check if external apps
    // should be checked for handling the initial redirect chain.
    if (mIsCustomTabIntent) {
        boolean sendToExternalApps = IntentUtils.safeGetBooleanExtra(intent,
                CustomTabIntentDataProvider.EXTRA_SEND_TO_EXTERNAL_DEFAULT_HANDLER, false);
        checkIsToChrome = !(sendToExternalApps
                && ChromeFeatureList.isEnabled(ChromeFeatureList.CCT_EXTERNAL_LINK_HANDLING));
    }

    if (checkIsToChrome) mIsInitialIntentHeadingToChrome = isIntentToChrome(mContext, intent);

    // A copy of the intent with component cleared to find resolvers.
    mInitialIntent = new Intent(intent).setComponent(null);
    Intent selector = mInitialIntent.getSelector();
    if (selector != null) selector.setComponent(null);
}
 

private void launchInTab(String webappUrl, int webappSource) {
    if (TextUtils.isEmpty(webappUrl)) return;

    Intent launchIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(webappUrl));
    launchIntent.setClassName(getPackageName(), ChromeLauncherActivity.class.getName());
    launchIntent.putExtra(ShortcutHelper.REUSE_URL_MATCHING_TAB_ELSE_NEW_TAB, true);
    launchIntent.putExtra(ShortcutHelper.EXTRA_SOURCE, webappSource);
    launchIntent.setFlags(
            Intent.FLAG_ACTIVITY_NEW_TASK | ApiCompatibilityUtils.getActivityNewDocumentFlag());
    startActivity(launchIntent);
}
 

/**
 * Called when the {@code linkUrl} should be opened in Chrome incognito tab.
 * @param linkUrl The url to open.
 */
public void onOpenInIncognitoTab(String linkUrl) {
    Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(linkUrl));
    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    intent.setPackage(mContext.getPackageName());
    intent.putExtra(ChromeLauncherActivity.EXTRA_IS_ALLOWED_TO_RETURN_TO_PARENT, false);
    intent.putExtra(IntentHandler.EXTRA_OPEN_NEW_INCOGNITO_TAB, true);
    intent.putExtra(Browser.EXTRA_APPLICATION_ID, mContext.getPackageName());
    IntentHandler.addTrustedIntentExtras(intent);
    IntentHandler.setTabLaunchType(intent, TabLaunchType.FROM_EXTERNAL_APP);
    IntentUtils.safeStartActivity(mContext, intent);
}