Pixel px and dp conversion in Android

In the layout file of Android, dp is often used as the width and height of the control, but in Java code, the size unit obtained by calling the getWidth () method
The difference is pixel px. The two units have obvious differences: dp is related to the screen density, while px is irrelevant to the screen density. Therefore, two
Mutual conversion between users. The sample code is as follows:
Public int Dp2Px (Context context, float dp ){
Final float scale = context. getResources (). getDisplayMetrics (). density;
Return (int) (dp * scale + 0.5f );
}
 
Public int Px2Dp (Context context, float px ){
Final float scale = context. getResources (). getDisplayMetrics (). density;
Return (int) (px/scale + 0.5f );
}