How can I fix this error: You need to use a Theme.AppCompat theme (or descendant) with this activity

Question

I searched all internet web sites to fix this error, but I couldn\'t. I just want to create AlertDialog with two button Yes and No.

This is my code:

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Answer 1

If you have another styles files in side another values folders like "values-v11", "values-v14"... Edit theme also and try to clean your app before running.

Edited: From your activity change getApplicationContext() to this:

AlertDialog.Builder builder = new AlertDialog.Builder(getApplicationContext());

to

AlertDialog.Builder builder = new AlertDialog.Builder(this);

Because the dialog also should extends the Appcompat Theme.