How make the Android app that works with all Android Versions?

[nikoo56]

How make Android app works with all Android versions?

I have created an Android app and signed and packaged it. That is version of Android that I have used in AndroidManifest:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="fa.test.NM"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk android:minSdkVersion="17" />

When I install the app on the latest Android it is working because the version matches the manifest. But when I try to install with older version of android it gave me an error:

 

[nikoo56]

How make Android app works with all Android versions?

I have created an Android app and signed and packaged it. That is version of Android that I have used in AndroidManifest:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="fa.test.NM"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk android:minSdkVersion="17" />

When I install the app on the latest Android it is working because the version matches the manifest. But when I try to install with older version of android it gave me an error:

 

[jonbanjo]

I think you should have

<uses-sdk
android:minSdkVersion="1"
android:targetSdkVersion="17" />

Also check that the app builds correctly and there are no warnings or errors.