Here you can find the source of getScreenWidth(Context context)
public static int getScreenWidth(Context context)
//package com.java2s; import android.content.Context; import android.util.DisplayMetrics; import android.view.WindowManager; public class Main { public static int getScreenWidth(Context context) { DisplayMetrics metric = new DisplayMetrics(); WindowManager windowManager = (WindowManager) context .getSystemService(Context.WINDOW_SERVICE); windowManager.getDefaultDisplay().getMetrics(metric); return metric.widthPixels; }/*from w w w . ja va 2 s . c o m*/ }