Launcher.java 文件源码

public boolean startActivitySafely(View v, Intent intent, ItemInfo item) {
    if (mIsSafeModeEnabled && !Utilities.isSystemApp(this, intent)) {
        Toast.makeText(this, R.string.safemode_shortcut_error, Toast.LENGTH_SHORT).show();
        return false;
    }
    // Only launch using the new animation if the shortcut has not opted out (this is a
    // private contract between launcher and may be ignored in the future).
    boolean useLaunchAnimation = (v != null) &&
            !intent.hasExtra(INTENT_EXTRA_IGNORE_LAUNCH_ANIMATION);
    Bundle optsBundle = useLaunchAnimation ? getActivityLaunchOptions(v) : null;

    UserHandle user = item == null ? null : item.user;

    // Prepare intent
    intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    if (v != null) {
        intent.setSourceBounds(getViewBounds(v));
    }
    try {
        if (AndroidVersion.isAtLeastMarshmallow
                && (item instanceof ShortcutInfo)
                && (item.itemType == Favorites.ITEM_TYPE_SHORTCUT
                 || item.itemType == Favorites.ITEM_TYPE_DEEP_SHORTCUT)
                && !((ShortcutInfo) item).isPromise()) {
            // Shortcuts need some special checks due to legacy reasons.
            startShortcutIntentSafely(intent, optsBundle, item);
        } else if (user == null || user.equals(Process.myUserHandle())) {
            // Could be launching some bookkeeping activity
            startActivity(intent, optsBundle);
        } else {
            LauncherAppsCompat.getInstance(this).startActivityForProfile(
                    intent.getComponent(), user, intent.getSourceBounds(), optsBundle);
        }
        return true;
    } catch (ActivityNotFoundException|SecurityException e) {
        Toast.makeText(this, R.string.activity_not_found, Toast.LENGTH_SHORT).show();
        e.printStackTrace();
    }
    return false;
}