<uses-permission>設定の罠 ref: http://qiita.com/nein37/items/da991b02441fa4da5432

AndroidManifest.xml

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.nein37.kanidaisuki" >
    <uses-feature android:name="android.hardware.microphone" android:required="true" />

file2.xml

    <uses-permission android:name="android.permission.RECORD_AUDIO" />

file3.xml

    <uses-permission android:name="android.permission.RECORD_AUDIO" />
    <uses-feature android:name="android.hardware.microphone" android:required="true" />

file4.xml

    <uses-permission android:name="android.permission.RECORD_AUDIO" />
    <uses-feature android:name="android.hardware.microphone" android:required="false" />