ScreenUtil.java
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package com.metroapp.forum;
import android.content.Context;
import android.content.res.Resources;
import android.util.DisplayMetrics;
import android.util.Log;
import java.lang.reflect.Field;
public class ScreenUtil {
private static final String TAG = "Demo.ScreenUtil";
private static double RATIO = 0.85;
public static int screenWidth;
public static int screenHeight;
public static int screenMin;// 宽高中，小的一边
public static int screenMax;// 宽高中，较大的值
public static float density;
public static float scaleDensity;
public static float xdpi;
public static float ydpi;
public static int densityDpi;
public static int dialogWidth;
public static int statusbarheight;
public static int navbarheight;
public static int dip2px(float dipValue) {
return (int) (dipValue * density + 0.5f);
}
public static int px2dip(float pxValue) {
return (int) (pxValue / density + 0.5f);
}
public static int getDialogWidth() {
dialogWidth = (int) (screenMin * RATIO);
return dialogWidth;
}
public static void init(Context context) {
if (null == context) {
return;
}
DisplayMetrics dm = context.getApplicationContext().getResources().getDisplayMetrics();
screenWidth = dm.widthPixels;
screenHeight = dm.heightPixels;
screenMin = (screenWidth > screenHeight) ? screenHeight : screenWidth;
density = dm.density;
scaleDensity = dm.scaledDensity;
xdpi = dm.xdpi;
ydpi = dm.ydpi;
densityDpi = dm.densityDpi;
Log.d(TAG, "screenWidth=" + screenWidth + " screenHeight=" + screenHeight + " density=" + density);
}
public static void GetInfo(Context context) {
if (null == context) {
return;
}
DisplayMetrics dm = context.getApplicationContext().getResources().getDisplayMetrics();
screenWidth = dm.widthPixels;
screenHeight = dm.heightPixels;
screenMin = (screenWidth > screenHeight) ? screenHeight : screenWidth;
screenMax = (screenWidth < screenHeight) ? screenHeight : screenWidth;
density = dm.density;
scaleDensity = dm.scaledDensity;
xdpi = dm.xdpi;
ydpi = dm.ydpi;
densityDpi = dm.densityDpi;
statusbarheight = getStatusBarHeight(context);
navbarheight = getNavBarHeight(context);
Log.d(TAG, "screenWidth=" + screenWidth + " screenHeight=" + screenHeight + " density=" + density);
}
public static int getStatusBarHeight(Context context) {
Class<?> c = null;
Object obj = null;
Field field = null;
int x = 0, sbar = 0;
try {
c = Class.forName("com.android.internal.R$dimen");
obj = c.newInstance();
field = c.getField("status_bar_height");
x = Integer.parseInt(field.get(obj).toString());
sbar = context.getResources().getDimensionPixelSize(x);
} catch (Exception E) {
E.printStackTrace();
}
return sbar;
}
public static int getNavBarHeight(Context context){
Resources resources = context.getResources();
int resourceId = resources.getIdentifier("navigation_bar_height", "dimen", "android");
if (resourceId > 0) {
return resources.getDimensionPixelSize(resourceId);
}
return 0;
}
}