Android screen adaptation scheme

The article is reproduced prohibited for commercial purposes, and cannot be accompanied by virtual currency, points, registration and other additional conditions. Reprint shall be marked by the provenance Mulgore grassland and author @jiongbull.

Android screen adaptation scheme

Statistical analysis 1. 2014q1 Active Android Device stats

Parameter table:

Model	resolution	pixel density	Screen Width
Samsung Galaxy Note2	720 *	xhdpi	360DP
Samsung Galaxy S3	720 *	xhdpi	360DP
Millet mobile phone 2S	720 *	xhdpi	360DP
Samsung Galaxy S4	1080 * 1920x1080	xxhdpi	360DP
Samsung Galaxy S2	480 * +	hdpi	320DP
Samsung Galaxy Note	800 *	xhdpi	400DP
Samsung Galaxy Note3	1080 * 1920x1080	xxhdpi	360DP
Red Rice mobile phone	720 *	xhdpi	360DP
Millet mobile phone 1S	720 *	xhdpi	360DP
Samsung Galaxy Ace	480 * +	hdpi	320DP
Millet mobile phone M2	720 *	xhdpi	360DP
Millet mobile phone M3	1080 * 1920x1080	xxhdpi	360DP
Millet mobile phone M1	480 * 854	hdpi	320DP
Millet mobile phone 2A	720 *	xhdpi	360DP
Samsung gt-s7568	480 * +	hdpi	320DP
Huawei G520	480 * 854	hdpi	320DP
Samsung Galaxy Mega 5.8	540 * 960	hdpi	360DP
Samsung gt-s7562	480 * +	hdpi	320DP
oppo r821t	480 * +	hdpi	320DP
Huawei C8815	540 * 960	hdpi	360dp

Conclusion: the screen width of most models is 320DP and 360DP.

2.2014Android Operating System trends

Conclusion:the operating system of 4.0 and above occupies more than 90% of the market share.

Scenario 1. Declaring the minimum operating system version supported by the client

• Filtering out older versions of the operating system helps us reduce the amount of work that is required for time-of-model adaptation
• New features Available with Android 3.2 (API level 13) can be adapted to different screens using the width of the screen

<uses-sdk android:minsdkversion= "/>"

2. Declare screen orientation as vertical screen

Avoid page layout Confusion when users cross screen.

android:screenorientation= "Portrait"

3. Layout

For mobile devices, use a set of layout resources, the layout of the size, color, text and other resources using reference values.

Res/layout/name.xml

4. Dimensions

Refer to the Parameters table in the statistical analysis, the VALUES-W320DP directory in the properties of the screen width of 320DP models, the VALUES-W360DP directory of the properties to adapt to the screen width of 360DP models.

Res/values-w320dp/dimens.xml
Res/values-w360dp/dimens.xml

5. Picture

• If you can avoid using bitmaps Do not use bitmaps, which can save space resources and improve the performance of the application
• You can use XML drawings instead of bitmaps, such as rounded rectangles, color maps plotted with XML save space resources, and can be automatically adapted
• using 9-patch,9-patch can be scaled, we can use very small 9-patch to populate very large UI controls, save space resources, improve application performance
• Minimize the layout level of the XML, reduce the layout hierarchy to reduce the work done by the system parsing code, make the interface render faster
• Using merge instead of include, use merge to reduce the effect of the layout hierarchy
• use Relativelayout as much as possible, The hierarchy of layouts can be reduced by using relativelayout compared to multiple linearlayout

pixel density	coefficient	logo resolution
hdpi	1.5	72 * 72
xhdpi	2.0	96 * 96
xxhdpi	3.0	144 * 144

Android screen adaptation scheme