copy file in android template changed the file content

Multi tool use
copy file in android template changed the file content
I modify the Android Studio's project-template, in the recipe.xml file, I add one line:
<copy from="root/Key" to="${escapeXmlAttribute(topOut)}/Key" />
and when I create new Android project, the Key indeed was created, but actually the file was modified, and I can't use it which gave errors:
java.io.IOException: Invalid keystore format
at sun.security.provider.JavaKeyStore.engineLoad(JavaKeyStore.java:658)
at sun.security.provider.JavaKeyStore$JKS.engineLoad(JavaKeyStore.java:56)
at sun.security.provider.KeyStoreDelegator.engineLoad(KeyStoreDelegator.java:224)
at sun.security.provider.JavaKeyStore$DualFormatJKS.engineLoad(JavaKeyStore.java:70)
at java.security.KeyStore.load(KeyStore.java:1445)
at sun.security.tools.keytool.Main.doCommands(Main.java:795)
at sun.security.tools.keytool.Main.run(Main.java:343)
at sun.security.tools.keytool.Main.main(Main.java:336)
so that I needn't to add the Key manually every time, and all my workmates do
– jason.yu
Jul 2 at 10:59
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Why did you add that line? I didn't get it correctly.
– salman
Jul 2 at 6:40