3288 8.1默认打开开发者选项 ，不用点击版本号

在packages/apps/Settings/src/com/android/settings/SettingsActivity.java下面

final boolean showDev = mDevelopmentPreferences.getBoolean(
            DevelopmentSettings.PREF_SHOW, android.os.Build.TYPE.equals("eng"))
            && !um.hasUserRestriction(UserManager.DISALLOW_DEBUGGING_FEATURES);       



+ //final boolean showDev = mDevelopmentPreferences.getBoolean(
   + //       DevelopmentSettings.PREF_SHOW, android.os.Build.TYPE.equals("eng"))
   + //        && !um.hasUserRestriction(UserManager.DISALLOW_DEBUGGING_FEATURES);
+	final boolean showDev = true ;

主要将showDev 设置为true

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