Camera basics : delegating to system camera api

manifest.xml

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="z.y.x.camera">

    <uses-feature
        android:name="android.hardware.camera.any"
        android:required="true" />
    ...
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher" ...>
        ...
    </application>
</manifest>