AndroidManifest.xml

<manifest xmls:android="http://schemas.android.com/apk/res/android" 
package="com.androidpermissionexample">

<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>
<uses-permission android;name="android.permission.CAMERA"/>

<application
   android:name=".MainApplication"
   android:label="@string/app_name"
   android:icon="@mipmap/ic_launcher"
   android:allowBackup="false"
   android:theme="style@AppTheme">
   <activity
      android:name=".MainActivity"
      android:label="@string/app_name"
      android:configChanges="keyboard|keyboardHidden|orientation|screenSize"
      android:windowSoftInputMode="adjustResize">
      <intent-filter>
          <action android:name="android.intent.action.MAIN"/>
          <category android:name="android.intent.category.LAUNCHER"/>
      </intent-filter>
    </activity>
    <activity android:name="com.facebook.react.devsupport.DevSettingsActivity"/>
</application>

</manifest>