Question

csdn怎样打开的时候，就是旧版本

Answer 1

1. 在android 4.0 之前,这个设置是在frameworks/base/service/..../SystemServer.java 里面
设置会根据system property 的persist.service.adb.enable 来设置。您可以看到类似如代码:

[java] view plain copy
// make sure the ADB_ENABLED setting value matches the secure property value
Settings.Secure.putInt(mContentResolver, Settings.Secure.ADB_ENABLED,
"1".equals(SystemProperties.get("persist.service.adb.enable")) ? 1 : 0);
// register observer to listen for settings changes

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你是乱回答的吧