android.support.v7.widget.Toolbar in Eclipse could not be instantiated

Question

I'm new to android programming. Here is the issue I'm facing:-

I followed the xml code for toolbar from http://android-developers.blogspot.com/2014/10/appcompat-v21-material-design-for-pre.html and applied into Eclipse. I received this message:

"The following classes could not be instantiated: - android.support.v7.widget.Toolbar (Open Class, Show Error Log) See the Error Log (Window > Show View) for more details."

May I ask any idea how to solve this issue? Thanks!

Could you guide me on how to add the support library the project? — DanKCl, Nov 20 '14 at 15:39
Please refer to https://developer.android.com/tools/support-library/setup.html for information — Alexander Zhak, Nov 20 '14 at 15:41
Followed the guide given and had the support library updated to 21.0.2; and it is working for now. Thanks!! — DanKCl, Nov 20 '14 at 15:50
[The following classes could not be instantiated: - android.support.v7.widget.Toolbar](https://stackoverflow.com/q/26575815/6521116) — LF00, Jul 11 '17 at 09:52
I solve it with [this answer](https://stackoverflow.com/a/30749068/6521116) — LF00, Jul 11 '17 at 10:03

IgorGanapolsky · Answer 1 · 2015-04-27T14:42:25.073

1

If you are targeting Android 22, then make your MainActivity extend from AppCompatActivity instead of ActionBarActivity. Then rebuild your gradle project and voila!

The only other possible solution I found is to switch SDK version to 21 in the upper-right (green android guy) of the Preview window.

edited Apr 27 '15 at 14:42

answered Apr 27 '15 at 14:29

IgorGanapolsky

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after doing that I had to "clear the cache" too and than it worked :) – Georgi Koemdzhiev Jun 09 '15 at 22:57

android.support.v7.widget.Toolbar in Eclipse could not be instantiated

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