Conversion between Android DP and PX

In development, you may need to dynamically set the size of the control

For example, set the width for a gridview:

Linearlayout.layoutparams linearParams2 = (linearlayout.layoutparams) head_gridview.getlayoutparams ();        int realwidth = utils.dp2px (context, +), linearparams2.width= (Headadapter.getcount ()) * (realwidth);        linearparams2.height=30;        Head_gridview.setlayoutparams (LINEARPARAMS2);

At this point we set a fixed number directly to the width, which is treated as a pixel, and the effect is likely to be different from what we want.

At this point we just have to do the DP px correlation conversion, the code is as follows:

/** * DP turns into PX * @param context Context Object * @param dp DP value * @return PX value *  */public static int dp2px (context, float DP) {      final float scale = context.getresources (). Getdisplaymetrics (). density;      return (int) (DP * scale + 0.5f);  }  /**PX to DP * @param context Context Object * @param px Pixel value * @return DP value *  */public static int PX2DP (context contexts, float px ) {      final float scale = context.getresources (). Getdisplaymetrics (). density;      return (int) (Px/scale + 0.5f);  }  

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Conversion between Android DP and PX