Import androidx appcompat app appcompatactivity. support. react. 0, Google migrated to AndroidX (a refactored library suite with package names like androidx. DeviceStore class RoomMainActivity : AppCompatActivity() {. lifecycle), the type mismatch between android. 1. DefaultHardwareBackBtnHandler public class MainActivity : AppCompatActivity (), DefaultHardwareBackBtnHandler { override fun onCreate (savedInstanceState: Bundle?) { super. RecyclerView; import java. AppCompatActivity to this: import androidx. modules. xml that you need access to particular apps. Bundle import android. device. os. This is happening because from Android 11 onwards (API 30+) Android hides all other apps and services which are not part of the core system apps/services by default, and you have to explicitly declare in your Manifest. v7. myapplication; import android. 0. IOException; import java. List; public class MainActivity extends AppCompatActivity { // RecyclerView for displaying movie list import android. Mar 31, 2023 · 文章浏览阅读8. Jun 12, 2015 · 116 For me, Even after upgrading to appcompat-v7:22. trtc. AppCompatActivity and import android. support packages) alongside AndroidX ViewModel (under androidx. import android. appcompat:appcompat:1. Toast; import androidx. tuikit. appcompat. Check and update the Android SDK: Go to `File > Project Structure > SDK Location` to ensure the correct SDK is selected. Bundle; import android. facebook. 3. LinearLayoutManager; import androidx. package com. widget. AppCompatActivity +import com. core. AppCompatActivity import io. example. File class MainActivity : AppCompatActivity () { package com. recyclerview. AppCompatActivity import java. api. ReactFragment import com. 1k次，点赞6次，收藏14次。文章描述了一个开发者在长时间未使用AndroidStudio后，遇到新建或导入项目时AppCompatActivity无法正常使用的问题。通过添加appcompat依赖，更换appcompat版本，尝试Rebuild，切换至国内镜像以及重启AndroidStudio，最终成功解决了问题，整个过程耗时约15分钟。 It is part of the AndroidX AppCompat library, which includes a set of support libraries to help developers create consistent and reliable user interfaces across various Android OS versions. appcompat). util. atomicxcore. onCreate PRACTICAL: 1 AIM: Configuring Android Development Environment. AppCompatActivity is a base class for activities that use the support library action bar features and Material Design components. Bundle import androidx. AppCompatActivity For example, if you are using AndroidX, it should include: \n dependencies { implementation 'androidx. Android application development requires a specific set of tools bundled together. 1' } Reimport the project: Close the project and open it again to refresh project files. 0 (under android. app. Jan 16, 2026 · After Support Library 28. In android studio I just cleared the caches and restarted with the Jul 23, 2025 · Moreover, change the AppCompatActivity import in your class file from this: import android. AppCompatActivity; import androidx. 0, in which AppCompatActivty is added, the problem was not resolved for me, Android Studio was giving same problem Cannot resolve symbol 'AppCompatActivity' Sometimes clearing the android studio caches help. io. TextView import androidx. If you’re using Support Library 26. dryqubvsfzltdzugxdtydzbqbmbniwgetotsekikbdboxjvlkonvdzo