DisplayUtil源码
import android.content.Context;
import android.util.DisplayMetrics;
import android.view.Display;
import android.view.WindowManager;
/**
* Created by CAPTON on 2017/1/11.
*/
public class DisplayUtil {
/**
* 将px值转换为dip或dp值,保证尺寸大小不变
*
*/
public static int px2dip(Context context, float pxValue) {
final float scale = context.getResources().getDisplayMetrics().density;
return (int) (pxValue / scale + 0.5f);
}
/**
* 将dip或dp值转换为px值,保证尺寸大小不变
*/
public static int dip2px(Context context, float dipValue) {
final float scale = context.getResources().getDisplayMetrics().density;
return (int) (dipValue * scale + 0.5f);
}
/**
* 将px值转换为sp值,保证文字大小不变
*
*/
public static int px2sp(Context context, float pxValue) {
final float fontScale = context.getResources().getDisplayMetrics().scaledDensity;
return (int) (pxValue / fontScale + 0.5f);
}
/**
* 将sp值转换为px值,保证文字大小不变
*
*/
public static int sp2px(Context context, float spValue) {
final float fontScale = context.getResources().getDisplayMetrics().scaledDensity;
return (int) (spValue * fontScale + 0.5f);
}
/*
* 获取设备的屏幕高度(px)
* */
public static int getScreenHeightPx(Context context){
WindowManager windowManager= (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
Display display=windowManager.getDefaultDisplay();
DisplayMetrics metrics=new DisplayMetrics();
display.getMetrics(metrics);
return metrics.heightPixels;
}
/*
* 获取设备的屏幕高度(dp)
* */
public static int getScreenHeightDp(Context context){
return px2dip(context,getScreenHeightPx(context));
}
/*
* 获取设备的屏幕宽度(px)
* */
public static int getScreenWidthPx(Context context){
WindowManager windowManager= (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
Display display=windowManager.getDefaultDisplay();
DisplayMetrics metrics=new DisplayMetrics();
display.getMetrics(metrics);
return metrics.widthPixels;
}
/*
* 获取设备的屏幕宽度(dp)
* */
public static int getScreenWidthDp(Context context){
return px2dip(context,getScreenWidthPx(context));
}
}