JDK下载：
? http://www.oracle.com/technetwork/java/javase/downloads/jdk-7u4-downloads-1591156.html
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eclipse下载：
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http://www.eclipse.org/downloads/packages/release/helios/sr2
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SDK的环境变量：
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path:
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E:\sdk\android-sdk-windows-1.6_r1\platform-tools;
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java_home:
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C:\Program Files (x86)\Java\jdk1.6.0_21这个是java_home的变量
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path:
C:\Program Files (x86)\Java\jdk1.6.0_21
C:\Program Files (x86)\Java\jdk1.6.0_21\bin
C:\Program Files (x86)\Java\jre6\bin
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http://wenku.baidu.com/view/b015ed2d0066f5335a8121ca.html
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http://wenku.baidu.com/view/946c7a8984868762caaed512.html
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