Activity工具类

public class ActivityUtils {
    /**
     * 获取当前正在运行的Activity
     * author LH
     * data 2016/4/21 17:30
     */
    public static String getRunningActivityName(Context context){
        ActivityManager activityManager=(ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
        String runningActivity=activityManager.getRunningTasks(1).get(0).topActivity.getClassName();
        return runningActivity;
    }
    /**
     * dp转px
     * author LH
     * data 2016/5/17 15:02
     */
    public static int dip2px(Context context, float dipValue){
        final float scale = context.getResources().getDisplayMetrics().density;
        return (int)(dipValue * scale + 0.5f);
    }
    /**
     * px转dp
     * author LH
     * data 2016/5/17 15:02
     */
    public static int px2dip(Context context, float pxValue){
        final float scale = context.getResources().getDisplayMetrics().density;
        return (int)(pxValue / scale + 0.5f);
    }
}