VPackageManagerService.java 文件源码

@Override
public List<ResolveInfo> queryIntentActivities(Intent intent, String resolvedType, int flags, int userId) {
    checkUserId(userId);
    ComponentName comp = intent.getComponent();
    if (comp == null) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH_MR1) {
            if (intent.getSelector() != null) {
                intent = intent.getSelector();
                comp = intent.getComponent();
            }
        }
    }
    if (comp != null) {
        final List<ResolveInfo> list = new ArrayList<ResolveInfo>(1);
        final ActivityInfo ai = getActivityInfo(comp, flags, userId);
        if (ai != null) {
            final ResolveInfo ri = new ResolveInfo();
            ri.activityInfo = ai;
            list.add(ri);
        }
        return list;
    }

    // reader
    synchronized (mPackages) {
        final String pkgName = intent.getPackage();
        if (pkgName == null) {
            return mActivities.queryIntent(intent, resolvedType, flags);
        }
        final PackageParser.Package pkg = mPackages.get(pkgName);
        if (pkg != null) {
            return mActivities.queryIntentForPackage(intent, resolvedType, flags, pkg.activities);
        }
        return new ArrayList<ResolveInfo>();
    }
}