getPackageManager().hasSystemFeature(String name);
//例如
getPackageManager().hasSystemFeature(PackageManager.FEATURE_WIFI);
getPackageManager().hasSystemFe(PackageManager.FEATURE_BLUETOOTH);
范例：
PackageManager pm = context.getPackageManager();
FeatureInfo[] features = pm.getSystemAvailableFeatures(); //得到所有支援的硬件種類
for (FeatureInfo feature : features) Log.v(TAG, feature.name);
boolean hasFlashlight = pm.hsaSystemFeature(PackageManager.FEATURE_CAMERA_FLASH); //是否支援閃光燈
boolean hasCamera = pm.hsaSystemFeature(PackageManager.FEATURE_CAMERA); //是否支援相機(jī)
boolean hasBt = pm.hsaSystemFeature(PackageManager.FEATURE_BLUETOOTH); //是否支援藍(lán)牙
hasSystemFeature 這個(gè)接口參考信息是
/system/etc/permissions/android.hardware*.xml 文件中定義的feature的信息
/frameworks/base/data/etc/android.hardware.camera.flash-autofocus.xml
< ?xml version="1.0" encoding="utf-8"?>
<permissions>
<feature name="android.hardware.camera" />
<feature name="android.hardware.camera.autofocus" />
<feature name="android.hardware.camera.flash" />
</permissions>
如果想增加Feature配置，可以再framework/base/data/etc/目錄下增加xml文件
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獲取當(dāng)前設(shè)備支持的所有features
FeatureInfo[] f = getPackageManager().getSystemAvailableFeatures();
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判斷當(dāng)前設(shè)備是否支持某項(xiàng)feature
boolean b = getPackageManager().hasSystemFeature(featureName);
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獲取當(dāng)前設(shè)備上已經(jīng)安裝的其他app的uses-feature配置骡楼，獲取其他app的uses-feature配置不需要特別的權(quán)限熔号，設(shè)備上已安裝的任意一個(gè)app都可以獲取。
try { String packageName = getPackageName(); PackageInfo p = getPackageManager().getPackageInfo(packageName, PackageManager.GET_CONFIGURATIONS); FeatureInfo[] f = p.reqFeatures; } catch (PackageManager.NameNotFoundException e) { e.printStackTrace(); }
