android开发之屏幕适配工具类

android开发之屏幕适配工具类

import android.content.Context;
import android.util.DisplayMetrics;

/**
 * 屏幕适配
 * @author Zane
 *
 */
public class ResolutionUtil {

    /**
     * 设备屏幕的基准宽度,高度
     */
    public static final int WINDOWS_STANDARD_SIZE_WIDTH = 720;
    public static final int WINDOWS_STANDARD_SIZE_HIGH = 1280;

    /**
     * 标准密度
     */
    private static final float DEFAULTDENSITY = 160;

    /**
     * 标准缩放大小
     */
    private static final float DEFAULTFONTDESITY = 1.0F;

    /**
     * 屏幕密度
     */
    private float density;

    /**
     * 当前屏幕的字体缩放比例
     */
    private float fontDesity;

    /**
     * 当前屏幕和标准屏幕(720P)的比例
     */
    private float scale;

    /**
     * 当前设备宽度 
     */
    private int deviceWidth;

    /**
     * 当前设备高度
     */
    private int deviceHeight;

    /**
     * 横向屏幕比例
     */
    private float scaleWidth ;

    /**
     * 竖向屏幕比例
     */
    private float scaleHeight;

    public ResolutionUtil(Context ctx){
        DisplayMetrics dm = ctx.getResources().getDisplayMetrics();
        this.deviceWidth  = dm.widthPixels;
        this.deviceHeight = dm.heightPixels;
        density = dm.densityDpi;
        fontDesity = dm.scaledDensity;
        if(deviceWidth > deviceHeight){
            scaleWidth = (float)deviceWidth / WINDOWS_STANDARD_SIZE_HIGH;
            scaleHeight = (float)deviceHeight / WINDOWS_STANDARD_SIZE_WIDTH;
        }else{
            scaleWidth = (float)deviceWidth / WINDOWS_STANDARD_SIZE_WIDTH;
            scaleHeight = (float)deviceHeight / WINDOWS_STANDARD_SIZE_HIGH;
        }

    }

    public int getWidth(){
        return deviceWidth;
    }

    public int getHeight(){
        return deviceHeight;
    }

    /**
     * 根据屏幕宽高比与密度获取适配当前屏幕px
     * @param pxVlaue  px
     * @param isWidth  是否为宽
     * @return
     */
    public int px2dp2pxWidth(float pxVlaue){
        float dp = pxVlaue / (density / DEFAULTDENSITY);
        return (int) (dp * (density / DEFAULTDENSITY) * scaleWidth);

    }

    /**
     * 根据屏幕宽高比与密度获取适配当前屏幕px
     * @param pxVlaue  px
     * @param isWidth  是否为宽
     * @return
     */
    public int px2dp2pxHeight(float pxVlaue){
        float dp = pxVlaue / (density / DEFAULTDENSITY);
        return (int) (dp * (density / DEFAULTDENSITY) * scaleHeight);
    }

    /**
     * 根据屏幕宽度与字体缩放比获取适配当前屏幕字体大小
     * @param spVlaue px
     * @return
     */
    public int px2sp2px(float spVlaue){
        float dp = spVlaue / fontDesity;
        int px = (int) (dp * (fontDesity / DEFAULTFONTDESITY) / fontDesity * scaleWidth);
        return px;
    }

    /**
     * 将dip转为px值
     * @param context
     * @param dipValue
     * @return
     */
    public int dip2px(float dipValue){ 
        return (int)((int)(dipValue * scale) * density +0.5);
    } 

    public int px2dip(Context context, float pxValue) {
        return (int)((int)(pxValue * scale) / density + 0.5 );
    }
}

RelativeLayout.LayoutParams mListViewLayoutParams = (RelativeLayout.LayoutParams) mListView.getLayoutParams();
mListViewLayoutParams.topMargin = resolutionUtil.px2dp2pxHeight(36); //36,美工给你啥参数你就写啥子参数
mListViewLayoutParams.leftMargin = resolutionUtil.px2dp2pxWidth(27);

转载地址：http://blog.youkuaiyun.com/zanelove/article/details/43669555