无法在Android Studio中解析符号“ coordinatorlayout”

我正在创建一个android应用并使用坐标布局，但是却遇到此错误。已经在build.gradle文件和activity_main.xml文件中添加了坐标布局。另一个类仅在此单行代码中存在问题时才能正常工作。是否有其他方法可以将坐标布局替换为任何其他布局设计。

这是我的MainActivity.java文件，已经导入了设计布局。在activity_main.xml文件中也是如此。

MainActivity.java

import android.net.Uri; import android.os.Bundle; import android.support.design.widget.CoordinatorLayout; import android.support.design.widget.Snackbar; import android.support.design.widget.TabLayout;

public class MainActivity extends AppCompatActivity { ... ... @BindView(R.id.image_preview) ImageView imagePreview;

@BindView(R.id.tabs)
TabLayout tabLayout;

@BindView(R.id.viewpager)
ViewPager viewPager;

@BindView(R.id.coordinator_layout)  //here I'm getting error 'cannot resolve symbol 'coordinate layout''
CoordinatorLayout coordinatorLayout;
...
...

} activity_main.xml

的build.gradle apply plugin: 'com.android.application' android { compileSdkVersion 27 defaultConfig { applicationId "com.example.app" minSdkVersion 24 targetSdkVersion 27 versionCode 1 versionName "1.0" testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" } buildTypes { release { minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' } } } dependencies { implementation fileTree(dir: 'libs', include: ['*.jar']) implementation 'com.android.support:appcompat-v7:27.0.2' implementation 'com.android.support.constraint:constraint-layout:1.0.2' implementation 'com.android.support:design:27.0.2' implementation 'com.android.support:support-v4:27.0.2' implementation 'android.arch.navigation:navigation-fragment:1.0.0-alpha05' implementation 'android.arch.navigation:navigation-ui:1.0.0-alpha05' testImplementation 'junit:junit:4.12' androidTestImplementation 'com.android.support.test:runner:1.0.1' androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2' }