I have read the officel documentation but still dosn't understand it!
I'm playing and experimenting with the smallest-width layouts in Android and it dosn't give any sense to me.
I have created these layouts: sw-300dp/350dp/360dp/400dp/450dp/500dp/
But my Galaxy S7 use the sw-360dp layout
. But 360dp
is far from any of the numbers provedid by getDisplayMetrics();
or the numbers of the screen I got from GSMArena. So why do Galaxy S7 use 360dp
and not 500dp
since the xdpi is 580dp and closer to 500dp?
Test Phone: Samsung Galaxy S7
Screen Size: 5.1"
Resolution: 1440x 2560 (577 ppi)
From det Logcat I retrived the following screen values of the phone:
getDisplayMetrics().densityDpi: 640
getDisplayMetrics().xdpi: 580
getDisplayMetrics().ydpi: 575:
getDisplayMetrics().widthPixels: 1440
The density of the screen on the S7 is 4.0
That means that there are 4 pixels per dp, therefore the screen is 1440 / 4 = 360dp wide.
I use the following methods frequently:
public static int dpToPx(int dp) {
return (int) (dp * Resources.getSystem().getDisplayMetrics().density);
}
public static int pxToDp(int px) {
return (int) (px / Resources.getSystem().getDisplayMetrics().density);
}
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