// 计算手机屏幕分辨率
private void computeDisplayMetrics() {
  // 手机屏幕分辨率为heightxwidth
  DisplayMetrics dm = new DisplayMetrics();
  this.getWindowManager().getDefaultDisplay().getMetrics(dm);
  int width = dm.widthPixels;
  int height = dm.heightPixels;
  // 当前手机屏幕分辨率为width x height
}

public static int dip2px(Context context,float dpValue) {
  final float scale = context.getResources().getDisplayMetrics().density;
  return (int) (dpValue * scale + 0.5f);
}

public static int px2dip(Context context,float pxValue) {
  final float scale = context.getResources().getDisplayMetrics().density;
  return (int) (pxValue / scale + 0.5f) - 15;
}