转载：http://blog.csdn.net/androidzhaoxiaogang/article/details/7692526
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Download the android-formatting.xml file
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Open Eclipse and go to Window->Preferences->Java->Code Style->Formatter
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Import the android-formatting.xml file and make sure “Android” is selected in the drop down list
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In eclipse go to Window->Preferences->General->Editors->Text Editors
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Check “Insert spaces for tabs” and make sure that “Displayed tab width” is 4
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Check “Show print margin” and make sure that “Print margin Columns” is 100
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Check “Show Whitespace characters” （如果不想显示空格的童鞋，可忽略这步）
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In eclipse go to Window->Preferences->Java->Editor->Save Actions
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Check “Perform the selected actions on save”
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Check “Additional Actions” than hit configure
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Under the “Code Organizing” tab check “Remove trailing whitespace” for all lines and “Correct Indention”
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Under the “Code Style” tab remove all check marks
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Under the “Missing Code” tab check everything
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Now go to Window->Preferences->XML->XML Files->Editor
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Check “Split multiple attributes each on a new line”
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Check “indent using spaces” and make sure the value is set to 4
