在android開發中我們經常遇到需要獲取螢幕高度和螢幕寬度。下面我就來說下我常用的一個類用於獲取螢幕的尺寸

public class ScreenUtils {
    //獲取螢幕寬度
public static int getScreenWidth(Context context) {
        WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
        DisplayMetrics metrics = new DisplayMetrics();
        wm.getDefaultDisplay().getMetrics(metrics);
        return 
 
metrics.widthPixels;
    }

    //獲取螢幕高度
public static int getScreenHeight(Context context) {
        WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
        DisplayMetrics metrics = new DisplayMetrics();
        wm.getDefaultDisplay().getMetrics(metrics);
        return 
 
metrics.heightPixels;
    }

}

//根據螢幕解析度將dip轉換成px
public static int dip2px(Context context, float dpValue) {
    int scale = context.getResources().getDisplayMetrics().densityDpi;
    return (int) (dpValue * scale + 0.5f);
}

//根據螢幕解析度將px轉換成dip
public static int px2dip(Context context, float pxValue) {
    int 
 
scale = context.getResources().getDisplayMetrics().densityDpi;
    return (int) (pxValue / scale + 0.5f);
}

//強px轉換成sp
public static int px2sp(Context context, float pxValue) {
    float fontScale = context.getResources().getDisplayMetrics().scaledDensity;
    return (int) (pxValue * fontScale + 0.5f);
}

//將sp轉換成px
public static int sp2px(Context context, float spValue) {
    float fontScale = context.getResources().getDisplayMetrics().scaledDensity;
    return (int) (spValue / fontScale + 0.5f);
}