Android custom theme won't apply - android-studio

Question

For my application I want to make a custom theme with just a different color for my actionbar. So I found a theme generator on the Internet:'Android Action Bar Style Generator'. I picked some color and downloaded the theme, put my downloaded stuff in the res-folder and changed the 'style' to my new theme. For some reason my theme never applies to my application. It always uses the baseTheme which is also specified in the downloaded theme. This is my manifest file:
<?xml version="1.0" encoding="utf-8"?>
<manifest
xmlns:android="http://schemas.android.com/apk/res/android"
package="com.jobslot.indupac" >
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<application
android:allowBackup="true"
android:icon="#mipmap/bpi_logo_transparant_background"
android:label="Indupac"
android:theme="#style/AppTheme">
<activity
android:name=".LoginActivity"
android:clearTaskOnLaunch="true">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".SettingsActivity">
</activity>
<activity
android:name=".GraphActivity">
</activity>
</application>
</manifest>
This is my style:
<resources>
<color name="basic_text">#000000</color>
<color name="basic_text_buttons">#FFFFFF</color>
<color name="blue_bpi">#003676</color>
<color name="light_green_bpi">#D6FFDA</color>
<style
name="AppTheme" parent="#style/Theme.Indupac">
</style>
</resources>

Answer 1

I found a solution for my problem. When I applied the default theme "#style.AppCompat.Light.DarkActionBar" and added "colorPrimary" as an item, then it worked like a charm. Keep in mind not to put "android:" in front of "colorPrimary", because that requires API 21. Here is what i got:
<resources>
<color name="basic_text">#000000</color>
<color name="basic_text_buttons">#FFFFFF</color>
<color name="blue_bpi">#003676</color>
<color name="light_green_bpi">#D6FFDA</color>
<style
name="AppTheme" parent="#style/Theme.AppCompat.Light.DarkActionBar">
<item name="colorPrimary">#color/blue_bpi</item>
<item name="colorAccent">#color/blue_bpi</item>
</style>
</resources>