RecognitionServiceManager.java 文件源码

/**
 * @return list of currently installed RecognitionService component names flattened to short strings
 */
public List<String> getServices(PackageManager pm) {
    List<String> services = new ArrayList<>();
    int flags = 0;
    //int flags = PackageManager.GET_META_DATA;
    List<ResolveInfo> infos = pm.queryIntentServices(
            new Intent(RecognitionService.SERVICE_INTERFACE), flags);

    for (ResolveInfo ri : infos) {
        ServiceInfo si = ri.serviceInfo;
        if (si == null) {
            Log.i("serviceInfo == null");
            continue;
        }
        String pkg = si.packageName;
        String cls = si.name;
        // TODO: process si.metaData
        String component = (new ComponentName(pkg, cls)).flattenToShortString();
        if (!mCombosExcluded.contains(component)) {
            services.add(component);
        }
    }
    return services;
}