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App Inventor 2 拓展参考文档 · App Inventor 2 中文网
...件Hash拓展：文件哈希计算和 Base64 编码文件，sha256、sha512 哈希
【向量计算】VectorArithmetic 拓展：计算两个向量相加的结果向量
【手机管理】App Inventor 2 TaifunTM 拓展：获取本机手机号码
【电池管理】App Inventor 2 TaifunBattery 拓...
event.preventDefault() function not working in IE
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11 Answers
11
Active
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App Inventor 2 拓展参考文档 · App Inventor 2 中文网
...件Hash拓展：文件哈希计算和 Base64 编码文件，sha256、sha512 哈希
【向量计算】VectorArithmetic 拓展：计算两个向量相加的结果向量
【手机管理】App Inventor 2 TaifunTM 拓展：获取本机手机号码
【电池管理】App Inventor 2 TaifunBattery 拓...
How to write character & in android strings.xml
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Ant: How to execute a command for each file in directory?
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61
Short Answer
Use <foreach> with a nested <FileSet>
Foreach requires ant-contrib.
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Intent - if activity is running, bring it to front, else start a new one (from notification)
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133
You can use this:
<activity
android:name=".YourActivity"
android:launchMode="singl...