- 获取自定义属性值后,需要调用typedArray.recycle()将TypedArray释放。
避免在onDraw方法里面执行对象的创建
,因为他会迅速增加内存的使用,而且很容易引起频繁的gc,甚至是内存抖动。- 当通过canvas.rotate()等操作对canvas进行变换时,要注意canvas.save()和canvas.restore()应该成对出现,不然会报错(java.lang.IllegalStateException: Underflow in restore - more restores than saves)。
-
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一个自定义的秒表计时器⏱
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