Se vuoi farla partire dalla 4.4 in su e non funzioni con le precedenti ...
<uses-sdk android:minSdkVersion="19" android:targetSdkVersion="19"/>
se vuoi stabilire una versione massima per questa App chessò la 5
<uses-sdk android:minSdkVersion="19" android:maxSdkVersion="21"/>
Android 7.0
24 Nougat Anche Wear 2,0
Android 6.0
23 MARSHMALLOW Platform Highlights
Android 5.1
22 LOLLIPOP_MR1 Platform Highlights
Android 5.0
21 LOLLIPOP
Android 4.4W
20 KITKAT_WATCH KitKat for Wearables Only
Android 4.4
19 KITKAT Platform Highlights
Android 4.3
18 JELLY_BEAN_MR2 Platform Highlights
Android 4.2, 4.2.2
17 JELLY_BEAN_MR1 Platform Highlights
Android 4.1, 4.1.1
16 JELLY_BEAN Platform Highlights
Android 4.0.3, 4.0.4
15 ICE_CREAM_SANDWICH_MR1 Platform Highlights
Android 4.0, 4.0.1, 4.0.2
14 ICE_CREAM_SANDWICH
Android 3.2
13 HONEYCOMB_MR2
Android 3.1.x
12 HONEYCOMB_MR1 Platform Highlights
Android 3.0.x
11 HONEYCOMB Platform Highlights
Android 2.3.4
10 GINGERBREAD_MR1 Platform Highlights
Android 2.3.3
Android 2.3.2
9 GINGERBREAD
Android 2.3.1
Android 2.3
Android 2.2.x
8 FROYO Platform Highlights
Android 2.1.x
7 ECLAIR_MR1 Platform Highlights
Android 2.0.1
6 ECLAIR_0_1
Android 2.0
5 ECLAIR
Android 1.6
4 DONUT Platform Highlights
Android 1.5
3 CUPCAKE Platform Highlights
Android 1.1
2 BASE_1_1
Android 1.0
1 BASE