Turn on hardware acceleration if available (such Android 3+) with Android APK 2.2

Question

I developed a application for Android 3.0, and it's runs perfectly well, but the client insist on compatibility with 2.2 devices.

Disabling hardware acceleration, using Android Compatibility Package, a NIO-backport support (For tasks and executors) and some reimplementation of View methods I was able to port my app for Android 2.2 and works really good, but if I run this apk into a newer device the performance is extremely slowly, so I want to know how to turn on hardware acceleration if available but still uses my 2.2 APK.

score 30 · Accepted Answer · answered Apr 26 '12 at 18:38

30

Add android:hardwareAccelerated="true" to your manifest, either for the <activity> or the <application>.

This attribute will be ignored on older versions of Android, but will be honored on Android 3.0+.

This will require you to have set your build target to API Level 11 or higher, but you probably already have that.

answered Apr 26 '12 at 18:38

CommonsWare

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The build target is 8 so it can run on Android 2.2 devices. Just adding android:hardwareAccelerated="true" with minSdk=8 give errors. – Marcos Vasconcelos Apr 26 '12 at 19:51
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@MarcosVasconcelos: The build target has nothing whatsoever to do with what devices it can run on. – CommonsWare Apr 26 '12 at 19:59
True, it's really doesn't matter which build target it's points, since minSdkVersion is respected. – Marcos Vasconcelos May 08 '12 at 18:44
so if you put the API level to 11 or higher with minSdk=8 and you publish your app, it's gonna be available for android 2.2 users? – Alexis May 24 '12 at 13:38
Although not important as the question, i wonder how would you suppress the warnings for XML? – Buddy Aug 16 '15 at 18:17
@EnesBattal: Sorry, but I do not know what warnings you are referring to. You may wish to ask a fresh Stack Overflow question, where you show your XML and show your warnings. – CommonsWare Aug 16 '15 at 18:20

score 3 · Answer 2 · answered Oct 14 '13 at 08:23

If you need support devises with old OS (2.3.X and older) version, not add android:hardwareAccelerated="true" to your manifest, try add this code in your java:

try { if( Build.VERSION.SDK_INT >= 11) getWindow().setFlags( 16777216, 16777216); } catch( Exception e) {} // FLAG_HARDWARE_ACCELERATED == 16777216 (0x01000000)

This is work in OS 3.0++ and not call error on 2.3.X and older.

score 2 · Answer 3 · answered Apr 26 '12 at 18:32

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You can look here to see how you can enable features based on Android version. You can do it with reflection too, but it is clunky.

answered Apr 26 '12 at 18:32

omermuhammed

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Well, this helped me to run specific code per version. Thanks! – Marcos Vasconcelos May 08 '12 at 18:43

Turn on hardware acceleration if available (such Android 3+) with Android APK 2.2

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