如何使用包管理器获取Android设备功能

public final static Boolean isFeatureAvailable(Context context,String featurE) {
        final PackageManager packageManager = context.getPackageManager();
        final FeatureInfo[] featuresList = packageManager.getSystemAvailableFeatures();
        for (FeatureInfo f : featuresList) {
            if (f.name != null && f.name.equals(featurE)) {
                 return true;
            }
        }

       return false;
    }

用法(即来自Activity类)：

if (isFeatureAvailable(this,PackageManager.FEATURE_CAMERA)) {
        ...
    }