清单中uses feature标记的用法

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.myapp">

    <uses-sdk android:minSdkVersion="21" />

    <uses-feature android:name="android.hardware.camera" />
    <uses-feature android:name="android.hardware.bluetooth" />
    <uses-feature android:name="android.hardware.location.gps" />

    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.CAMERA" />
    <uses-permission android:name="android.permission.BLUETOOTH" />

    ...

</manifest>