CODEWITHSUNDEEP
androidandroid-layout
Kristel Alphonso
Kristel Alphonso

Reputation: 29

Cannot Resolve Symbol MainActivity (using Android Studio 2.0)

My activity_main.xml has this code :

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools" android:id="@+id/container"
    android:layout_width="match_parent" android:layout_height="match_parent"
    tools:context=".MainActivity" tools:ignore="MergeRootFrame" />

The line tools:context gives me the error that it cannot resolve the symbol MainAcitvity.

Can anyone help me with this ?

Upvotes: 1

Views: 7008

Answers (3)

jashgopani
jashgopani

Reputation: 573

If this problem occurs everytime you create a new project and you don't even get autocomplete suggestions in XML layouts, try changing your compile sdk version or gradle version and let the gradle sync again. This solved the issue for me.

Go to Project Structure Settings by pressing Ctrl+Alt+Shift+S and

To change SDK version

go inside Modules section change your SDK version

Changing Compile SDK Version Android Studio

To change Gradle version

go inside Project section change your SDK version Changing Gradle Version Android Studio

Upvotes: 1

Connecting life with Android
Connecting life with Android

Reputation: 3926

Ideally it should work. if not, clean build again. Make sure your MainActivity is there and visible. you can also try to give full name to your activity. you also check your manifest for the package and activity name.

if its really not working, there is something wrong. try to delete this attribute and run it to see you are able to run it.

we need this attribute for layout editor to guess a default theme, since themes are defined in the Manifest and are associated with activities, not layouts.

Upvotes: 0

Saurabh Vardani
Saurabh Vardani

Reputation: 1861

Give the complete path for 

 tools:context=".MainActivity"

like

tools:context="com.example.android.sunshine.app.MainActivity"

Upvotes: 2

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