Ambiguous method call. Both findViewById (int) in AppCompactActivity and Activity

Question

I refer this link Error : Ambiguous method call. Both findViewById (int) in AppCompactActivity and Activity to solve but there is no import android.app.Activity and also if I convert my import android.support.v7.app.AppCompatActivity into android.app.Activity then the error goes but I want to use AppCompatActivity.

I also update all libraries in SDK and also invalidate and restart but nothing works.

why this error occurs and how to solve this?

The import may not be there but are you sure that your Activity is not extending that class explicitly by declaring the full android.app.Activity? — JoxTraex, Nov 01 '17 at 05:28
yes i'm sure there is only this line import android.support.v7.app.AppCompatActivity — android, Nov 01 '17 at 05:29
I'm talking about where you Class extends are you sure that super class is not explicitly defined? — JoxTraex, Nov 01 '17 at 05:30
Have you tried upgrading to latest version of `AppCompatActivity` — Dipali Shah, Nov 01 '17 at 05:31
@ JoxTraex, no not extending activity it is like this public class DashboardActivity extends AppCompatActivity — android, Nov 01 '17 at 05:32
Pleas check https://stackoverflow.com/questions/46900261/error-ambiguous-method-call-both-findviewbyid-int-in-appcompactactivity-and/#51129460 — Upendra Shah, Nov 21 '18 at 10:26

score 2 · Answer 1 · answered Nov 01 '17 at 05:31

2

I guess you have something like that

ViewClass view = (ViewClass)findViewById(R.id.view);

in your code and you'd updated API level? If so, change your code to

ViewClass view = findViewById(R.id.view); // without redundant cast

The findViewById method signature was changed in API 25, please refer to SDK

answered Nov 01 '17 at 05:31

Northern Poet

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hi @Northern Poet, i just updated 26 sdk tools to 27 and it runs perfectly without removing anything in code – android Nov 01 '17 at 06:55

score 2 · Answer 2 · answered Nov 17 '17 at 23:04

2

If you recently updated your project to API 26, try doing invalidate caches/restart, then re-sync gradle.

answered Nov 17 '17 at 23:04

hungryghost

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score 0 · Answer 3 · answered Mar 23 '19 at 18:26

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If doing invalidate caches/restart, then re-sync gradle, does not work, restart the computer, it worked for me.

answered Mar 23 '19 at 18:26

Hernâni Pereira

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score 0 · Answer 4 · answered Feb 13 '21 at 12:04

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I was working with a new project and in gradle files did not have version numbers set in them, there was "N" across minsdkversion and targetsdkversion, changing to desired sdk version solved the problem

answered Feb 13 '21 at 12:04

Meenohara

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Ambiguous method call. Both findViewById (int) in AppCompactActivity and Activity

4 Answers4