I have this error in my logcat when imported appcompat v7 from \" sdk/extras/android/ \"
Platform L is a preview and requires application manifest to
In projects Properties -> Android You have to choose other than Android-L, In example Android 4.4W, because they have the same API number - API-20
Change
<uses-sdk android:minSdkVersion="7"/>
to
<uses-sdk android:minSdkVersion="L"/>
Set this
<uses-sdk android:minSdkVersion="7"/>
to
<uses-sdk android:minSdkVersion="L"/>