写一个小程序,用来计算它包含的代码所需的耗时.虽然简单,测试代码是否耗时还是有点用的,不用重新写嘛~ import java.util.Date; import java.util.concurrent.TimeUnit; public class TimeLag { private Date start; private Date end; public TimeLag() { start = new Date(); } public String cost() { end = new Dat…
本来是想练习Matrix的,没想到写了一个自定义View,监听它的ASWD键后,不知道该如何按下ASWD(手机上一般都没实体按键了).于是: 一个自定义View: public class MyView extends View { private final Bitmap bitmap; private int width; private int height; private Matrix matrix = new Matrix(); private boolean isScale = f…
