ScreenUtils.java

package forezp.com.douyalibrary.utils;


import android.app.Activity;
import android.content.Context;
import android.content.res.Resources;
import android.util.DisplayMetrics;
import android.view.Display;
import android.view.View;
import android.view.WindowManager;

/**
 * Created by forezp on 2015/12/28.
 * 屏幕操作工具类
 */
public class ScreenUtils {

    /**
     * 获取屏幕px
     * @param context
     * @return  分辨率
     */
    static public int getScreenWidthPixels(Context context) {
        DisplayMetrics dm = new DisplayMetrics();
        ((WindowManager) context.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay()
                .getMetrics(dm);
        return dm.widthPixels;
    }

    /**
     * 获取屏幕的宽度
     * @param context
     * @return
     */
    public static  int getScreenWidthDp(Context context){
        WindowManager wm = (WindowManager)
                context.getSystemService(Context.WINDOW_SERVICE);

        int width = wm.getDefaultDisplay().getWidth();
        return width;
    }
    /**
     * dip 转px
     * @param context
     * @param dip
     * @return
     */
    static public int dipToPx(Context context, int dip) {
        return (int) (dip * getScreenDensity(context) + 0.5f);
    }

    /**
     * sp转px.
     *
     * @param value   the value
     * @param context the context
     * @return the int
     */
    public static int sp2px(float value, Context context) {
        Resources r;
        if (context == null) {
            r = Resources.getSystem();
        } else {
            r = context.getResources();
        }
        float spvalue = value * r.getDisplayMetrics().scaledDensity;
        return (int) (spvalue + 0.5f);
    }

    /**
     * px转sp.
     *
     * @param value   the value
     * @param context the context
     * @return the int
     */
    public static int px2sp(float value, Context context) {
        final float scale = context.getResources().getDisplayMetrics().scaledDensity;
        return (int) (value / scale + 0.5f);
    }

    /**
     * 获取屏幕密度
     * @param context
     * @return
     */

    static public float getScreenDensity(Context context) {
        try {
            DisplayMetrics dm = new DisplayMetrics();
            ((WindowManager) context.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay()
                    .getMetrics(dm);
            return dm.density;
        } catch (Exception e) {
            return DisplayMetrics.DENSITY_DEFAULT;
        }
    }

    /**
     *  获取屏幕宽高乘积
     * @param activity
     * @return
     */

    public static int getScreenSize(Activity activity) {
        int widthPixels = 0;
        int heightPixels = 0;
        DisplayMetrics dm = new DisplayMetrics();
        if (dm != null) {
            activity.getWindowManager().getDefaultDisplay().getMetrics(dm);
            widthPixels = dm.widthPixels;
            heightPixels = dm.heightPixels;
        }
        return widthPixels * heightPixels;
    }


    /**
     * 获取屏幕的高度
     *
     * @param context
     * @return
     */
    public static int getScreenHeight(Context context) {
        WindowManager manager = (WindowManager) context
                .getSystemService(Context.WINDOW_SERVICE);
        Display display = manager.getDefaultDisplay();
        return display.getHeight();
    }

    /**
     * 获取屏幕中控件顶部位置的高度--即控件顶部的Y点
     *
     * @return
     */
    public static int getScreenViewTopHeight(View view) {
        return view.getTop();
    }

    /**
     * 获取屏幕中控件底部位置的高度--即控件底部的Y点
     *
     * @return
     */
    public static int getScreenViewBottomHeight(View view) {
        return view.getBottom();
    }

    /**
     * 获取屏幕中控件左侧的位置--即控件左侧的X点
     *
     * @return
     */
    public static int getScreenViewLeftHeight(View view) {
        return view.getLeft();
    }

    /**
     * 获取屏幕中控件右侧的位置--即控件右侧的X点
     *
     * @return
     */
    public static int getScreenViewRightHeight(View view) {
        return view.getRight();
    }

}