CODEWITHSUNDEEP
androidandroid-gradle-pluginandroid-support-library
adelphus
adelphus

Reputation: 10328

Why is AppCompatActivity not found during gradle build?

Adding the v7 appcompat support library to my build.gradle, I can use ActionBarActivity with no problems. But if I replace ActionBarActivity with AppCompatActivity, I get:

./gradlew assembleDebug
:preBuild
:compileDebugNdk UP-TO-DATE
:preDebugBuild
:checkDebugManifest
:preReleaseBuild
:prepareComAndroidSupportAppcompatV72200Library UP-TO-DATE
:prepareComAndroidSupportSupportV42200Library UP-TO-DATE
:prepareDebugDependencies
:compileDebugAidl UP-TO-DATE
:compileDebugRenderscript UP-TO-DATE
:generateDebugBuildConfig UP-TO-DATE
:generateDebugAssets UP-TO-DATE
:mergeDebugAssets UP-TO-DATE
:generateDebugResValues UP-TO-DATE
:generateDebugResources UP-TO-DATE
:mergeDebugResources UP-TO-DATE
:processDebugManifest UP-TO-DATE
:processDebugResources UP-TO-DATE
:generateDebugSources UP-TO-DATE
:compileDebugJava
MainActivity.java:4: error: cannot find symbol
import android.support.v7.app.AppCompatActivity;

MainActivity.java:

package app.test.v7.support;

// replacing ActionBarActivity with AppCompatActivity fails.
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;

// replacing ActionBarActivity with AppCompatActivity fails.
public class MainActivity extends ActionBarActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }

}

manifest has:

<uses-sdk android:minSdkVersion="7" android:targetSdkVersion="21"  />

build.gradle:

apply plugin: 'com.android.application'

android {
    compileSdkVersion 21
    buildToolsVersion "22.0.0"

    defaultConfig {
    targetSdkVersion 21
    }
}

dependencies {
  compile 'com.android.support:support-v4:22.0.0'
  compile 'com.android.support:appcompat-v7:22.0.0'
}

The Android developer docs indicate that ActionBarActivity itself derives from AppCompatActivity and recommends using AppCompatActivity instead of (the now deprecated) ActionBarActivity.

Any ideas why the class cannot be found during the build?

Upvotes: 1

Views: 7086

Answers (2)

Pradeep Kumar
Pradeep Kumar

Reputation: 141

With todays latest version nothing worked, until upgrading the settings.gradle gradle version fixed it (it was 2.1.3) something in gradle toolchain seems to classpath 'com.android.tools.build:gradle:2.2.3'

Upvotes: 1

adelphus
adelphus

Reputation: 10328

Thanks to @CommonsWare for the suggestions in the comments.

Updating the support library version to v22.2 in build.gradle:

compile 'com.android.support:appcompat-v7:22.2.0'

sorted the problem.

Really wish this was mentioned in the Android docs (particularly since ActionBarActivity is now deprecated) but meh...

Upvotes: 5

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