android开发之万能屏幕适配

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 );
    }
}

Eg:

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);

总结:一般人,我不告诉你!