Cannot Resolve Symbol Theme, Themeoverlay, and widget Appcompat

Question

Earlier before everything was fine but now when I reopen my Android project, inside the values folder in styles, most of the parent is being highlighted in red. I don't understand why and how to resolve it. when I compile the project it works fine but I just want to remove the errors. Below is the error file

Here is the image file:

and my app build file is

apply plugin: 'com.android.application'

android {
    compileSdkVersion 26
    useLibrary 'org.apache.http.legacy'
    buildToolsVersion "26.0.0"
    defaultConfig {
        applicationId "com.nepalpolice.cdp"
        minSdkVersion 15
        multiDexEnabled true
        targetSdkVersion 26
        versionCode 15
        versionName "15.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

        lintOptions {
            checkReleaseBuilds false
            abortOnError false
        }

        packagingOptions {
            exclude 'META-INF/DEPENDENCIES'
            exclude 'META-INF/LICENSE'
            exclude 'META-INF/LICENSE.txt'
            exclude 'META-INF/license.txt'
            exclude 'META-INF/NOTICE'
            exclude 'META-INF/project.properties'
            exclude 'META-INF/NOTICE.txt'
            exclude 'META-INF/notice.txt'
            exclude 'META-INF/ASL2.0'
            exclude 'allclasses-frame.html'
        }

    }
    dexOptions {
        jumboMode true
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}





dependencies {
    implementation 'com.google.firebase:firebase-auth:11.4.2'
    implementation 'com.google.firebase:firebase-storage:11.4.2'
    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
    implementation("com.github.bumptech.glide:glide:4.6.1") {
        exclude group: "com.android.support"
    }
    compile 'com.github.bumptech.glide:glide:4.6.1'
    annotationProcessor 'com.github.bumptech.glide:compiler:4.6.1'
    implementation 'com.android.support:appcompat-v7:26.+'
    compile 'com.android.support:design:26.+'
    implementation 'com.android.support:support-v4:26.+'
    implementation 'com.android.support:cardview-v7:26.+'
    implementation 'com.android.support:recyclerview-v7:26.+'
    implementation 'com.google.firebase:firebase-messaging:11.4.2'
    compile 'com.google.firebase:firebase-database:11.4.2'
    compile 'com.google.firebase:firebase-core:11.4.2'
    implementation 'com.google.gms:google-services:3.1.0'
    implementation 'com.android.support:design:26.+'
    implementation 'de.hdodenhof:circleimageview:2.2.0'
    compile 'com.android.support:multidex:1.0.1'
    implementation 'com.theartofdev.edmodo:android-image-cropper:2.5.1'
    implementation 'com.android.support:gridlayout-v7:26.+'
    implementation 'com.github.clans:fab:1.6.2'
    testCompile 'junit:junit:4.12'
    implementation 'com.google.android.gms:play-services-maps:11.4.2'
    implementation 'com.google.firebase:firebase-firestore:11.4.2'
    implementation 'id.zelory:compressor:2.1.0'
    compile 'pl.droidsonroids.gif:android-gif-drawable:1.2.12'
    implementation files('libs/libGoogleAnalyticsServices.jar')

    apply plugin: 'com.google.gms.google-services'
}

And my build gradle file is

apply plugin: 'com.android.application'

android {
    compileSdkVersion 26
    useLibrary 'org.apache.http.legacy'
    buildToolsVersion "26.0.0"
    defaultConfig {
        applicationId "com.nepalpolice.cdp"
        minSdkVersion 15
        multiDexEnabled true
        targetSdkVersion 26
        versionCode 15
        versionName "15.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

        lintOptions {
            checkReleaseBuilds false
            abortOnError false
        }

        packagingOptions {
            exclude 'META-INF/DEPENDENCIES'
            exclude 'META-INF/LICENSE'
            exclude 'META-INF/LICENSE.txt'
            exclude 'META-INF/license.txt'
            exclude 'META-INF/NOTICE'
            exclude 'META-INF/project.properties'
            exclude 'META-INF/NOTICE.txt'
            exclude 'META-INF/notice.txt'
            exclude 'META-INF/ASL2.0'
            exclude 'allclasses-frame.html'
        }

    }
    dexOptions {
        jumboMode true
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}





dependencies {
    implementation 'com.google.firebase:firebase-auth:11.4.2'
    implementation 'com.google.firebase:firebase-storage:11.4.2'
    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
    implementation("com.github.bumptech.glide:glide:4.6.1") {
        exclude group: "com.android.support"
    }
    compile 'com.github.bumptech.glide:glide:4.6.1'
    annotationProcessor 'com.github.bumptech.glide:compiler:4.6.1'
    implementation 'com.android.support:appcompat-v7:26.+'
    compile 'com.android.support:design:26.+'
    implementation 'com.android.support:support-v4:26.+'
    implementation 'com.android.support:cardview-v7:26.+'
    implementation 'com.android.support:recyclerview-v7:26.+'
    implementation 'com.google.firebase:firebase-messaging:11.4.2'
    compile 'com.google.firebase:firebase-database:11.4.2'
    compile 'com.google.firebase:firebase-core:11.4.2'
    implementation 'com.google.gms:google-services:3.1.0'
    implementation 'com.android.support:design:26.+'
    implementation 'de.hdodenhof:circleimageview:2.2.0'
    compile 'com.android.support:multidex:1.0.1'
    implementation 'com.theartofdev.edmodo:android-image-cropper:2.5.1'
    implementation 'com.android.support:gridlayout-v7:26.+'
    implementation 'com.github.clans:fab:1.6.2'
    testCompile 'junit:junit:4.12'
    implementation 'com.google.android.gms:play-services-maps:11.4.2'
    implementation 'com.google.firebase:firebase-firestore:11.4.2'
    implementation 'id.zelory:compressor:2.1.0'
    compile 'pl.droidsonroids.gif:android-gif-drawable:1.2.12'
    implementation files('libs/libGoogleAnalyticsServices.jar')

    apply plugin: 'com.google.gms.google-services'
}

I tried to clean and run project, but still issue hasn't been fixed.

@MikeM. that seems to remove the problem but only when I replaced compiledSDKversion to 27 instead of 26 . But still I have targetSDK version to 26.should I also change this to 27?? willl it cause any problem? — Irttehsk Raju, Apr 12 '18 at 02:03
Generally, the reason why it happened is ```'com.android.support:support-v4:26.+' ``` How about specifying version? (Most people doesn't recommend using '+') ```'com.android.support:support-v4:26.1.0' ``` and also, ```'com.android.support:design-v4:26.1.0'``` — TyeolRik, Apr 12 '18 at 02:11

score 1 · Answer 1 · answered May 20 '18 at 07:36

1

I had the same problem. Maybe this post has the same roots too.
Anyway just two steps helped me:

1.Close the project from the File menu.
2.Open the project again as existing Android Studio project.

answered May 20 '18 at 07:36

V.March

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Cannot Resolve Symbol Theme, Themeoverlay, and widget Appcompat

1 Answers1