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

private void focusChromeIfNecessary() {
    Set<Integer> visibleTaskIds = getTaskIdsForVisibleActivities();
    int tabbedTaskId = -1;

    List<WeakReference<Activity>> runningActivities =
            ApplicationStatus.getRunningActivities();
    for (int i = 0; i < runningActivities.size(); i++) {
        Activity activity = runningActivities.get(i).get();
        if (activity == null) continue;

        if (activity instanceof ChromeTabbedActivity) {
            tabbedTaskId = activity.getTaskId();
            break;
        }
    }

    // If the task containing the tabbed activity is visible, then do nothing as there is no
    // snapshot that would need to be regenerated.
    if (visibleTaskIds.contains(tabbedTaskId)) return;

    Context context = ContextUtils.getApplicationContext();
    Intent startIntent = new Intent(Intent.ACTION_MAIN);
    startIntent.setPackage(context.getPackageName());
    startIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    context.startActivity(startIntent);
}
 

@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();
        }
    }
}
 

/**
 * Iterate across the running activities and for any running tabbed mode activities close their
 * incognito tabs.
 *
 * @see TabWindowManager#getIndexForWindow(Activity)
 */
private void closeIncognitoTabsInRunningTabbedActivities() {
    ThreadUtils.runOnUiThreadBlocking(new Runnable() {
        @Override
        public void run() {
            List<WeakReference<Activity>> runningActivities =
                    ApplicationStatus.getRunningActivities();
            for (int i = 0; i < runningActivities.size(); i++) {
                Activity activity = runningActivities.get(i).get();
                if (activity == null) continue;
                if (!(activity instanceof ChromeTabbedActivity)) continue;

                ChromeTabbedActivity tabbedActivity = (ChromeTabbedActivity) activity;
                if (tabbedActivity.isActivityDestroyed()) continue;

                tabbedActivity.getTabModelSelector().getModel(true).closeAllTabs(
                        false, false);
            }
        }
    });
}
 

/**
 * Returns the activity to use when handling "open in other window" or "move to other window".
 * Returns null if the current activity doesn't support opening/moving tabs to another activity.
 */
public Class<? extends Activity> getOpenInOtherWindowActivity(Activity current) {

    if (current instanceof ChromeTabbedActivity2) {
        // If a second ChromeTabbedActivity is created, MultiWindowUtils needs to listen for
        // activity state changes to facilitate determining which ChromeTabbedActivity should
        // be used for intents.
        ApplicationStatus.registerStateListenerForAllActivities(sInstance.get());
        return ChromeTabbedActivity.class;
    } else if (current instanceof ChromeTabbedActivity) {
        mTabbedActivity2TaskRunning = true;
        ApplicationStatus.registerStateListenerForAllActivities(sInstance.get());
        return ChromeTabbedActivity2.class;
    } else {
        return null;
    }
}
 

private void focusChromeIfNecessary() {
    Set<Integer> visibleTaskIds = getTaskIdsForVisibleActivities();
    int tabbedTaskId = -1;

    List<WeakReference<Activity>> runningActivities =
            ApplicationStatus.getRunningActivities();
    for (int i = 0; i < runningActivities.size(); i++) {
        Activity activity = runningActivities.get(i).get();
        if (activity == null) continue;

        if (activity instanceof ChromeTabbedActivity) {
            tabbedTaskId = activity.getTaskId();
            break;
        }
    }

    // If the task containing the tabbed activity is visible, then do nothing as there is no
    // snapshot that would need to be regenerated.
    if (visibleTaskIds.contains(tabbedTaskId)) return;

    Context context = ContextUtils.getApplicationContext();
    Intent startIntent = new Intent(Intent.ACTION_MAIN);
    startIntent.setPackage(context.getPackageName());
    startIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    context.startActivity(startIntent);
}
 

@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();
        }
    }
}
 

/**
 * Iterate across the running activities and for any running tabbed mode activities close their
 * incognito tabs.
 *
 * @see TabWindowManager#getIndexForWindow(Activity)
 */
private void closeIncognitoTabsInRunningTabbedActivities() {
    ThreadUtils.runOnUiThreadBlocking(new Runnable() {
        @Override
        public void run() {
            List<WeakReference<Activity>> runningActivities =
                    ApplicationStatus.getRunningActivities();
            for (int i = 0; i < runningActivities.size(); i++) {
                Activity activity = runningActivities.get(i).get();
                if (activity == null) continue;
                if (!(activity instanceof ChromeTabbedActivity)) continue;

                ChromeTabbedActivity tabbedActivity = (ChromeTabbedActivity) activity;
                if (tabbedActivity.isActivityDestroyed()) continue;

                tabbedActivity.getTabModelSelector().getModel(true).closeAllTabs(
                        false, false);
            }
        }
    });
}
 

/**
 * Returns the activity to use when handling "open in other window" or "move to other window".
 * Returns null if the current activity doesn't support opening/moving tabs to another activity.
 */
public Class<? extends Activity> getOpenInOtherWindowActivity(Activity current) {

    if (current instanceof ChromeTabbedActivity2) {
        // If a second ChromeTabbedActivity is created, MultiWindowUtils needs to listen for
        // activity state changes to facilitate determining which ChromeTabbedActivity should
        // be used for intents.
        ApplicationStatus.registerStateListenerForAllActivities(sInstance.get());
        return ChromeTabbedActivity.class;
    } else if (current instanceof ChromeTabbedActivity) {
        mTabbedActivity2TaskRunning = true;
        ApplicationStatus.registerStateListenerForAllActivities(sInstance.get());
        return ChromeTabbedActivity2.class;
    } else {
        return null;
    }
}
 

private void focusChromeIfNecessary() {
    Set<Integer> visibleTaskIds = getTaskIdsForVisibleActivities();
    int tabbedTaskId = -1;

    List<WeakReference<Activity>> runningActivities =
            ApplicationStatus.getRunningActivities();
    for (int i = 0; i < runningActivities.size(); i++) {
        Activity activity = runningActivities.get(i).get();
        if (activity == null) continue;

        if (activity instanceof ChromeTabbedActivity) {
            tabbedTaskId = activity.getTaskId();
            break;
        }
    }

    // If the task containing the tabbed activity is visible, then do nothing as there is no
    // snapshot that would need to be regenerated.
    if (visibleTaskIds.contains(tabbedTaskId)) return;

    Context context = ContextUtils.getApplicationContext();
    Intent startIntent = new Intent(Intent.ACTION_MAIN);
    startIntent.setPackage(context.getPackageName());
    startIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    context.startActivity(startIntent);
}
 

@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 void openNewTab(String url, String extraHeaders, ResourceRequestBody postData,
        int disposition, boolean isRendererInitiated) {
    // If attempting to open an incognito tab, always send the user to tabbed mode.
    if (disposition == WindowOpenDisposition.OFF_THE_RECORD) {
        if (isRendererInitiated) {
            throw new IllegalStateException(
                    "Invalid attempt to open an incognito tab from the renderer");
        }
        LoadUrlParams loadUrlParams = new LoadUrlParams(url);
        loadUrlParams.setVerbatimHeaders(extraHeaders);
        loadUrlParams.setPostData(postData);
        loadUrlParams.setIsRendererInitiated(isRendererInitiated);

        Class<? extends ChromeTabbedActivity> tabbedClass =
                MultiWindowUtils.getInstance().getTabbedActivityForIntent(
                        null, ContextUtils.getApplicationContext());
        AsyncTabCreationParams tabParams = new AsyncTabCreationParams(loadUrlParams,
                new ComponentName(ContextUtils.getApplicationContext(), tabbedClass));
        new TabDelegate(true).createNewTab(tabParams,
                TabLaunchType.FROM_LONGPRESS_FOREGROUND, TabModel.INVALID_TAB_INDEX);
        return;
    }

    super.openNewTab(url, extraHeaders, postData, disposition, isRendererInitiated);
}
 

/**
 * Returns the activity to use when handling "open in other window" or "move to other window".
 * Returns null if the current activity doesn't support opening/moving tabs to another activity.
 */
public Class<? extends Activity> getOpenInOtherWindowActivity(Activity current) {

    if (current instanceof ChromeTabbedActivity2) {
        // If a second ChromeTabbedActivity is created, MultiWindowUtils needs to listen for
        // activity state changes to facilitate determining which ChromeTabbedActivity should
        // be used for intents.
        ApplicationStatus.registerStateListenerForAllActivities(sInstance.get());
        return ChromeTabbedActivity.class;
    } else if (current instanceof ChromeTabbedActivity) {
        mTabbedActivity2TaskRunning = true;
        ApplicationStatus.registerStateListenerForAllActivities(sInstance.get());
        return ChromeTabbedActivity2.class;
    } else {
        return null;
    }
}
 

protected NativePage buildNewTabPage(ChromeActivity activity, Tab tab,
        TabModelSelector tabModelSelector) {
    if (FeatureUtilities.isChromeHomeEnabled()) {
        if (tab.isIncognito()) {
            return new ChromeHomeIncognitoNewTabPage(activity, tab, tabModelSelector,
                    ((ChromeTabbedActivity) activity).getLayoutManager());
        } else {
            return new ChromeHomeNewTabPage(activity, tab, tabModelSelector,
                    ((ChromeTabbedActivity) activity).getLayoutManager());
        }
    } else if (tab.isIncognito()) {
        return new IncognitoNewTabPage(activity);
    } else {
        return new NewTabPage(activity, new TabShim(tab), tabModelSelector);
    }
}
 

private String getCurrentTabOrigin() {
    Activity activity = ApplicationStatus.getLastTrackedFocusedActivity();

    if (!(activity instanceof ChromeTabbedActivity)) return null;

    Tab tab = ((ChromeTabbedActivity) activity).getActivityTab();
    if (tab == null || !tab.isInitialized()) return null;

    String url = tab.getUrl();
    try {
        return UrlFormatter.formatUrlForSecurityDisplay(new URI(url), true);
    } catch (URISyntaxException | UnsatisfiedLinkError e) {
        // UnstatisfiedLinkError can only happen in tests as the natives are not initialized
        // yet.
        Log.e(TAG, "Unable to parse the origin from the URL. Using the full URL instead.");
        return url;
    }
}
 

/**
 * @return Whether {@link ChromeTabbedActivity} is waiting for a result from this Activity.
 */
private boolean isHerbResultNeeded() {
    if (!TextUtils.equals(FeatureUtilities.getHerbFlavor(), ChromeSwitches.HERB_FLAVOR_DILL)) {
        return false;
    }

    String callingActivity =
            getCallingActivity() == null ? null : getCallingActivity().getClassName();
    return TextUtils.equals(callingActivity, ChromeTabbedActivity.class.getName());
}
 

@Override
public void onActivityStateChange(Activity activity, int newState) {
    if (newState == ActivityState.RESUMED && activity instanceof ChromeTabbedActivity) {
        mLastResumedTabbedActivity =
                new WeakReference<ChromeTabbedActivity>((ChromeTabbedActivity) activity);
    }
}
 

/**
 * 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));
    }
}
 

/**
 * @return Whether there is already an browser instance of Chrome already running.
 */
public boolean isChromeBrowserActivityRunning() {
    for (WeakReference<Activity> reference : ApplicationStatus.getRunningActivities()) {
        Activity activity = reference.get();
        if (activity == null) continue;

        String className = activity.getClass().getName();
        if (TextUtils.equals(className, ChromeTabbedActivity.class.getName())) {
            return true;
        }
    }
    return false;
}
 

@Override
public TabModelSelector buildSelector(Activity activity,
        TabCreatorManager tabCreatorManager, int selectorIndex) {
    // Merge tabs if this is the TabModelSelector for ChromeTabbedActivity and there are no
    // other instances running. This indicates that it is a complete cold start of
    // ChromeTabbedActivity. Tabs should only be merged during a cold start of
    // ChromeTabbedActivity and not other instances (e.g. ChromeTabbedActivity2).
    boolean mergeTabs = FeatureUtilities.isTabModelMergingEnabled()
            && activity.getClass().equals(ChromeTabbedActivity.class)
            && getInstance().getNumberOfAssignedTabModelSelectors() == 0;
    TabPersistencePolicy persistencePolicy = new TabbedModeTabPersistencePolicy(
            selectorIndex, mergeTabs);
    return new TabModelSelectorImpl(
            activity, tabCreatorManager, persistencePolicy, true, true);
}
 

@Override
public void onActivityStateChange(Activity activity, int newState) {
    if (newState == ActivityState.RESUMED && activity instanceof ChromeTabbedActivity) {
        mLastResumedTabbedActivity =
                new WeakReference<ChromeTabbedActivity>((ChromeTabbedActivity) activity);
    }
}
 

/**
 * 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));
    }
}
 

/**
 * @return Whether there is already an browser instance of Chrome already running.
 */
public boolean isChromeBrowserActivityRunning() {
    for (WeakReference<Activity> reference : ApplicationStatus.getRunningActivities()) {
        Activity activity = reference.get();
        if (activity == null) continue;

        String className = activity.getClass().getName();
        if (TextUtils.equals(className, ChromeTabbedActivity.class.getName())) {
            return true;
        }
    }
    return false;
}
 

private static ComponentName getComponentName() {
    if (!ApplicationStatus.hasVisibleActivities()) return null;

    Activity activity = ApplicationStatus.getLastTrackedFocusedActivity();
    if (activity instanceof ChromeTabbedActivity) {
        return activity.getComponentName();
    }

    return null;
}
 

@Override
public TabModelSelector buildSelector(Activity activity,
        TabCreatorManager tabCreatorManager, int selectorIndex) {
    // Merge tabs if this is the TabModelSelector for ChromeTabbedActivity and there are no
    // other instances running. This indicates that it is a complete cold start of
    // ChromeTabbedActivity. Tabs should only be merged during a cold start of
    // ChromeTabbedActivity and not other instances (e.g. ChromeTabbedActivity2).
    boolean mergeTabs = FeatureUtilities.isTabModelMergingEnabled()
            && activity.getClass().equals(ChromeTabbedActivity.class)
            && getInstance().getNumberOfAssignedTabModelSelectors() == 0;
    TabPersistencePolicy persistencePolicy = new TabbedModeTabPersistencePolicy(
            selectorIndex, mergeTabs);
    return new TabModelSelectorImpl(
            activity, tabCreatorManager, persistencePolicy, true, true);
}
 

@CalledByNative
public void navigateBack() {
    if (mActivity instanceof ChromeTabbedActivity) {
        // TODO(mthiesse): We should do this for custom tabs as well, as back for custom tabs
        // is also expected to close tabs.
        ((ChromeTabbedActivity) mActivity).handleBackPressed();
    } else {
        mActivity.getToolbarManager().back();
    }
    updateHistoryButtonsVisibility();
}
 

private void updateHistoryButtonsVisibility() {
    if (mTab == null) {
        nativeSetHistoryButtonsEnabled(mNativeVrShell, false, false);
        return;
    }
    // Hitting back when on the NTP usually closes Chrome, which we don't allow in VR, so we
    // just disable the back button.
    boolean shouldAlwaysGoBack = mActivity instanceof ChromeTabbedActivity
            && (mNativePage == null || !(mNativePage instanceof NewTabPage));
    boolean canGoBack = mTab.canGoBack() || shouldAlwaysGoBack;
    nativeSetHistoryButtonsEnabled(mNativeVrShell, canGoBack, mTab.canGoForward());
}
 

private static boolean activitySupportsVrBrowsing(Activity activity) {
    if (activity instanceof ChromeTabbedActivity) return true;
    if (activity instanceof CustomTabActivity) {
        return ChromeFeatureList.isEnabled(ChromeFeatureList.VR_CUSTOM_TAB_BROWSING);
    }
    return false;
}
 

/**
 * Iterate across the running activities and for any running tabbed mode activities close their
 * incognito tabs.
 *
 * @see TabWindowManager#getIndexForWindow(Activity)
 */
private void closeIncognitoTabsInRunningTabbedActivities() {
    ThreadUtils.runOnUiThreadBlocking(new Runnable() {
        @Override
        public void run() {
            List<WeakReference<Activity>> runningActivities =
                    ApplicationStatus.getRunningActivities();
            for (int i = 0; i < runningActivities.size(); i++) {
                Activity activity = runningActivities.get(i).get();
                if (activity == null) continue;
                if (!(activity instanceof ChromeTabbedActivity)) continue;

                ChromeTabbedActivity tabbedActivity = (ChromeTabbedActivity) activity;
                if (tabbedActivity.isActivityDestroyed()) continue;

                // Close the Chrome Home bottom sheet if it is open over an incognito tab.
                if (tabbedActivity.getBottomSheet() != null
                        && tabbedActivity.getBottomSheet().isSheetOpen()
                        && tabbedActivity.getTabModelSelector().isIncognitoSelected()) {
                    // Skip animating to ensure to sheet is closed immediately. If the animation
                    // is run, the incognito profile will be in use until the end of the
                    // animation.
                    tabbedActivity.getBottomSheet().setSheetState(
                            BottomSheet.SHEET_STATE_PEEK, false);
                }

                tabbedActivity.getTabModelSelector().getModel(true).closeAllTabs(
                        false, false);
            }
        }
    });
}
 

@Override
public void onActivityStateChange(Activity activity, int newState) {
    if (newState == ActivityState.RESUMED && activity instanceof ChromeTabbedActivity) {
        mLastResumedTabbedActivity =
                new WeakReference<ChromeTabbedActivity>((ChromeTabbedActivity) activity);
    }
}
 

/**
 * 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));
    }
}