Android Unit conversion (Conversion tool class between PX, DP, SP)

In Android development, when it comes to screen video problems, the conversion between PX, DP, SP is an important part, so Yang Brother a tool class for everyone.

Package com.zw.express.tool;


Import Android.content.Context;
Import Android.util.DisplayMetrics;
/**
* YDC
* @author Administrator
*
*/
public class Densityutils {
/**
* Switch from Dip unit to PX (pixel) According to the resolution of the phone
*/
public static int dp2px (context context, float Dpvalue) {
Displaymetrics DM = context.getresources (). Getdisplaymetrics ();
Final float scale = dm.density;
return (int) (Dpvalue * scale + 0.5f);
}


/**
* According to the resolution of the phone from PX (pixel) to the unit to become DP
*/
public static float PX2DP (context context, float Pxvalue) {
Displaymetrics DM = context.getresources (). Getdisplaymetrics ();
Final float scale = dm.density;
Return (pxvalue-0.5f)/scale;
}


/**
* Convert PX value to SP value, keep text size unchanged
*/
public static int PX2SP (context context, float Pxvalue) {
Final float Fontscale = context.getresources (). Getdisplaymetrics (). scaleddensity;
return (int) (Pxvalue/fontscale + 0.5f);
}


/**
* Convert SP value to PX value, keep text size unchanged
*/
public static int sp2px (context context, float Spvalue) {
Final float Fontscale = context.getresources (). Getdisplaymetrics (). scaleddensity;
return (int) (Spvalue * fontscale + 0.5f);
}
}

Android Unit conversion (Conversion tool class between PX, DP, SP)