01_Android介绍

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<span>一、什么是<span style="font-family: Arial;">3G</span></span>
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<p class="p0" style="margin-bottom: 0pt; margin-top: 0pt; text-align: justify;">[size=10.5000pt; font-family: '宋体';]????由于<span style="font-family: 'Times New Roman';">3G[/size]<span>商用需要相当浩大的工程，要从目前的</span><span style="font-family: 'Times New Roman';">2G</span><span>迈向</span><span style="font-family: 'Times New Roman';">3G</span><span>不可能一下就衔接得上，因此前几年</span><span style="font-family: 'Times New Roman';">2.5G</span><span>的手机就出现了。符合</span><span style="font-family: 'Times New Roman';">2.5G</span><span>标准的技术有</span><span style="font-family: 'Times New Roman';">CDMA2000?1X</span><span>和</span><span style="font-family: 'Times New Roman';">GPRS</span><span>，中国联通使用的是</span><span style="font-family: 'Times New Roman';">CDMA2000?1X</span><span>标准，中国移动使用的是</span><span style="font-family: 'Times New Roman';">GPRS</span><span>标准。目前，我们可以把</span><span style="font-family: 'Times New Roman';">2.5G</span><span>移动通信技术看作是</span><span style="font-family: 'Times New Roman';">2G</span><span>迈向</span><span style="font-family: 'Times New Roman';">3G</span><span>的衔接性技术，在</span><span style="font-family: 'Times New Roman';">2.5G</span><span>网络下出现了如</span><span style="font-family: 'Times New Roman';">WAP</span><span>、蓝牙</span><span style="font-family: 'Times New Roman';">(Bluetoot)?</span><span>等技术。</span></span>

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<span>二、智能手机软件平台</span>
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<p class="p0" style="margin-bottom: 0pt; margin-top: 0pt; text-align: justify;">[size=10.5000pt; font-family: '宋体';]智能手机软件平台有：[/size]

<p class="p0" style="margin-bottom: 0pt; margin-top: 0pt; text-align: justify;">[size=10.5000pt; font-family: '宋体';]iPhone?,[/size]

<p class="p0" style="margin-bottom: 0pt; margin-top: 0pt; text-align: justify;">[size=10.5000pt; font-family: '宋体';]Symbian,[/size]

<p class="p0" style="margin-bottom: 0pt; margin-top: 0pt; text-align: justify;">[size=10.5000pt; font-family: '宋体';]Palm.[/size]

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<span>三、什么是<span style="font-family: Arial;">Android</span></span>
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<p class="p0" style="margin-bottom: 0pt; margin-top: 0pt; text-align: justify;">[size=10.5000pt; font-family: '宋体';]????Android<span>一词的本义指“机器人”，[/size]<span style="font-family: 'Times New Roman';">Android</span><span>是</span><span style="font-family: 'Times New Roman';">Google</span><span>于</span><span style="font-family: 'Times New Roman';">07</span><span>年</span><span style="font-family: 'Times New Roman';">11</span><span>月</span><span style="font-family: 'Times New Roman';">5</span><span>日宣布的基于</span><span style="font-family: 'Times New Roman';">Linux</span><span>平台开源手机操作系统名称，该平台由操作系统、中间件、用户界面和应用软件组成。在国内，联想、戴尔、多普达、飞利浦、中兴、三星、摩托罗拉、等厂商已经推出基于</span><span style="font-family: 'Times New Roman';">Android</span><span>平台的智能手机。</span></span>

<p class="p0" style="margin-bottom: 0pt; margin-top: 0pt; text-align: justify;">[size=10.5000pt; font-family: '宋体';]国内基于<span style="font-family: 'Times New Roman';">android[/size]<span>系统开发的有阿里云、小米手机、华为云手机，还有移动的</span><span style="font-family: 'Times New Roman';">Ophone</span><span>系统</span></span>