1. 确认Java SDK是否已经正确配置。在Android Studio的“File”菜单中选择“Project Structure”，然后在“SDK Location”选项卡下确认Java SDK路径是否正确配置。
2. 确认项目的build.gradle文件中是否添加了如下代码：

android { compileSdkVersion XX buildToolsVersion "XX.X.X" defaultConfig { applicationId "XXXXXX" minSdkVersion XX targetSdkVersion XX versionCode XX versionName "X.X.X" multiDexEnabled true }

}

dependencies { implementation fileTree(dir: 'libs', include: ['*.jar']) implementation 'com.android.support:appcompat-v7:XX.X.X' implementation 'com.android.support:design:XX.X.X' implementation 'com.android.support:support-v4:XX.X.X' implementation 'com.android.support:recyclerview-v7:XX.X.X' implementation 'com.android.support:cardview-v7:XX.X.X' implementation 'com.google.android.gms:play-services-ads:XX.X.X' implementation 'com.google.android.gms:play-services-analytics:XX.X.X' implementation 'com.android.support.constraint:constraint-layout:XX.X.X' testImplementation 'junit:junit:4.12' androidTestImplementation 'com.android.support.test:runner:XX.X.X' androidTestImplementation 'com.android.support.test.espresso:espresso-core:XX.X.X' }

3. 确认项目的gradle.properties文件中是否添加了如下代码：

org.gradle.jvmargs=-Xmx1536m

4. 尝试在项目的build.gradle文件中添加以下代码：

compileOptions { sourceCompatibility JavaVersion.VERSION_1_8 targetCompatibility JavaVersion.VERSION_1_8 }

5. 如果以上方法都没有解决问题，可以尝试删除项目的.iml和.idea文件夹，然后重新导入项目。