android - PhoneGap - target-densitydpi on viewport -

i'm creating app android , ios using phonegap.

after creating "helloworld" app phonegap's template see target-densitydpi=device-dpi on viewport default. okay, that's fine decided run tests jquery mobile ui , do not use target-densitydpi on viewport (by way if do, website should small on high dpi devices).

since need images of app great @ low , high resolution devices, decided run tests on galaxy s4.

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first, target-densitydpi=device-dpi removed:

<meta name="viewport" content="user-scalable=no, initial-scale=1, maximum-scale=1, minimum-scale=1, width=device-width, height=device-height" /> 

the document.width 360px, created 360px image , blurry @ gs4 screen.

<img src="360img.jpg" style="width:360px;"> 

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second, target-densitydpi=device-dpi enabled:

<meta name="viewport" content="user-scalable=no, initial-scale=1, maximum-scale=1, minimum-scale=1, width=device-width, height=device-height, target-densitydpi=device-dpi" /> 

the document.width 1080px, created 1080px image , great @ gs4 screen.

<img src="1080img.jpg" style="width:1080px;"> 

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third, target-densitydpi=device-dpi removed 1080px image:

<meta name="viewport" content="user-scalable=no, initial-scale=1, maximum-scale=1, minimum-scale=1, width=device-width, height=device-height" /> 

the document.width 360px, used created 1080px image , looks great @ gs4 screen.

<img src="1080img.jpg" style="width:100%;"> 

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i able same results on second , third tests, but, wich 1 best (or correct) way work phonegap apps?

thanks!

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edit1:

i'm thinking provide these images via api, can tell size of window return correct sized image.

window.width 1080px @ tests, return correct sized image not problem.

for icons, i'm considering svg, don't need create sprites each resolution. can resize de image via css or javascript , should still looking good.

what made me think don't use target-densitydpi=device-dpi jquery mobile ui, library responsive , don't use it, why?

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target-densitydpi not supported ios , deprecated android. suggest not use it.