Is Eclipse better than Android studio?
Android Studio is faster than Eclipse. There is no need to add a plugin to Android Studio but if we use Eclipse then we do need to. Eclipse needs many resources to start but Android Studio does not. Android Studio is based on IntelliJ’s Idea Java IDE and Eclipse uses the ADT Plugin to develop Android applications.
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Does deprecated code still work?
It can still be used, but eventually it will not work with other things because it is no longer being supported.

Should I use deprecated code?
The Android SDK has deprecated and obsolete APIs. Also, there may exist incompatible APIs depending on the SDK version. Consequently, it is recommended that developers refer to the “Android API Differences Report” and consider replacing deprecated APIs.
Do deprecated methods still work in Android Studio?
Yes you can use deprecated methods as long as the depreciated method exists in the framework. By deprecating a method the platform developers are trying to tell you that either something is wrong with the method or there is already better way for doing the task.

Is Android studio best for app development?
Android studio is the fastest developer tools I have used for creating applications, and is also very useful in accelerating performance of the applications. Structured code modules are very helpful, building, testing and debugging is also very easy. Coding is very smart and easy in android studio.
Can I use deprecated methods in Android Studio?
Is deprecated deprecated in Java?
Similarly, when a class or method is deprecated, it means that the class or method is no longer considered important. It is so unimportant, in fact, that it should no longer be used at all, as it might well cease to exist in the future. The need for deprecation comes about because as a class evolves, its API changes.
Is Java for Android deprecated?
To conclude (and to answer my own question), no, Java will probably stay as the main language for Android programming for a long time. But this doesn’t mean Google is not looking for other options to develop in parallel to step away from Java.