DisplayUtils.java

package com.lfk.justwetools.Utils;

import android.content.Context;
import android.util.TypedValue;

/**
 * Created by liufengkai on 15/11/8.
 */
public class DisplayUtils {
    /**
     * px to dip 尺寸不变
     *
     * @param context
     * @param pxValue
     * @return
     */
    public static int px2dip(Context context, float pxValue) {
        final float scale = context.getResources().getDisplayMetrics().density;
        return (int) (pxValue / scale + 0.5f);
    }


    /**
     * dip to px 尺寸不变
     *
     * @param context
     * @param dipValue
     * @return
     */
    public static int dip2px(Context context, float dipValue) {
        final float scale = context.getResources().getDisplayMetrics().density;
        return (int) (dipValue * scale + 0.5f);
    }

    /**
     * dp to px
     *
     * @param context
     * @param dp
     * @return
     */
    public static int dp2px(Context context, int dp) {
        return (int) TypedValue.applyDimension(
                TypedValue.COMPLEX_UNIT_DIP,
                dp,
                context.getResources().getDisplayMetrics());
    }

    /**
     * px to sp 文字不变
     *
     * @param context
     * @param pxValue
     * @return
     */
    public static int px2sp(Context context, float pxValue) {
        final float fontScale = context.getResources().getDisplayMetrics().scaledDensity;
        return (int) (pxValue / fontScale + 0.5f);
    }

    /**
     * sp to px 文字不变
     *
     * @param context
     * @param spValue
     * @return
     */
    public static int sp2px(Context context, float spValue) {
        final float fontScale = context.getResources().getDisplayMetrics().scaledDensity;
        return (int) (spValue * fontScale + 0.5f);
    }

    /**
     * sp to px
     * @param context
     * @param px
     * @return
     */
    public static int sp2px(Context context, int px) {
        return (int) TypedValue.applyDimension(
                TypedValue.COMPLEX_UNIT_SP,
                px,
                context.getResources().getDisplayMetrics());
    }

}