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发布时间:2012-02-22 11:53:37
异或(xor, exclusive or)也叫半加运算或模2和,其运算法则相当于不带进位的二进制加法。 用^表示异或运算符,则异或的运算法则为:0^0=0,1^0=1,0^1=1,1^1=0,这些法则与加法是相同的,只是不带进位。所以,异或满足交换律和结合律: 1. a ^ b = b ^ a 2. a ^ b ^ c = a .........
发布时间:2013-07-24 18:00:13
px is one pixel. scale-independent pixels ( sp ) and density-independent pixels ( dip )you want to use sp for font sizes and dip for everything else.dip==dpfrom here http://developer.android.com/guide/topics/resources/more-r.........
发布时间:2012-01-27 14:03:58
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