Why Android applications are written in Java?

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Why Android applications are written in Java?

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Why Android applications are written in Java?

last updated: 12 November 2023

Android is based on Linux with a set of native core C/C++ libraries.

Android applications are written in Java.
Applications written in Java run on Android own Java Virtual Machine, called Dalvik Virtual Machine (instead of Java Virtual Machine) .
Dalvik Virtual Machine is optimized to operate on the small and mobile devices.

In May 2017, Google announced support for a new Kotlin programming language.
You probably should start in Java, and then move into Kotlin.

Why Android applications are written in Java?

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Объявления

• What is the Android operating system? What version numbers were in Android

• What are ARM processors? | Android

• Что такое AndroidX?

Java application (for Android phone) in Android Studio

• Why Android applications are written in Java?

• Download and install Android Studio to write programs for Android phones in Java, Kotlin

• Open Android Studio on the computer (Windows 10)

• Create a new project on Java with one simple Activity in Android Studio (write a program for Android phones, tablets) in Windows 10

• Compile and run the application in Android Studio on computer (Windows) in emulator mode Android Device

• Running the application Android Studio in debugging on computer (Windows) in emulator mode Android Device

• Error "error while waiting for device: the emulator process for ..... has terminated" when running an application in Android Studio on a computer (Windows) in emulator mode Android Device

• Error "Error while waiting for device: Illegal char <*> at index 0: *.lock ..." when running the application in Android Studio

• Error "AVD is already running ..." when running the application in Android Studio

• Error "CMake "3.18.1" was not found in SDK, PATH, or by cmake.dir property" when compiling a project to Android Studio

• Error "Execution failed for task ":app:compressDebugAssets" when compiling a project to Android Studio

• All errors when starting the Android application

• What is Android SDK (a copy of the Android operating system)? Installing Android SDK 8.1 in Android Studio ...

• Create a Android virtual device in Android Studio

• Install HAXM

• Activity in Android

Kotlin application (for Android phone) in Android Studio

• Download and install Android Studio to write programs for Android phones in Java, Kotlin

• Create a new project "Empty Views Activity" on Kotlin in Android Studio (write a program for Android phones, tablets) in Windows 10

• Compile and run Kotlin an application in Android Studio on a computer (Windows) in emulator mode Android Device

• Run Kotlin an application in Android Studio in debugging on a computer (Windows) in emulator mode Android Device

• Running and debugging Kotlin Android Studio app on my phone via USB

• Long wait when running Kotlin Android application. I see the message: "I/zygote:Waiting for a blocking GC ProfileSaver"

• Create Android project, add TextView and show the value on the phone | Android Telephone, Android Studio, Kotlin, Windows 10

• Copy the data in the class and object. We use the attribute @Parcelize and the interface Parcelable. | Kotlin | Android Studio

• Error "Class is not abstract and does not implement abstract member public abstract fun describeContents(): Int defined in android.os.Parcelable" | Kotlin | Android Studio | @Parcelize | Parcelable

• Show a window with 2 buttons: yes, no and you don't need to add any resource, layout | I call the AlertDialog function in Kotlin | Android Studio

• Android Kotlin application takes photo using camera and draws in the application | Android Studio | Kotlin

• Android Kotlin choose photo from gallery and draws in the application | Android Studio | Kotlin ...

• getExternalFilesDir - function that returns the full path to an external directory where our application can place persistent files | Android Studio, Kotlin

• getFilesDir - function that returns the full path to directory where our application can place files | Android Studio, Kotlin

• How do I work with files media in Android? What are content Uri and file path. The difference between getExternalFilesDir and getFilesDir ... | Android Studio, Kotlin

• How to Make a Variable in the build.gradle File and Pass It to the Manifest File AndroidManifest.xml | Android Studio | Kotlin

• How to Make a Variable in a build.gradle File and Pass It to a Kotlin File | Android Studio | Kotlin

• Moshi (converting json text to a class object) | deserialization in Kotlin | Android Studio

• Moshi (converting array json to list of object) | deserialization in Kotlin | Android Studio

• Error "Failed to find the generated JsonAdapter class for class com.example.androidkotlinapp1.MyBook" | Exception | Kotlin | Moshi | Android Studio

• Error "A problem occurred evaluating project ':app'. Caused by: CustomMessageMissingMethodException: Could not find method kapt() for arguments [com.squareup.moshi:moshi-kotlin-codegen:1.14.0]" | When compiling a Kotlin, Moshi project in Android Studio

Jetpack application (for Android phone) in Android Studio | Kotlin

• What is Jetpack for Android?

• Create a new project "Jetpack Compose" on Kotlin in Android Studio (write a program for Android phones, tablets) in Windows 10

• Compilation error "Dependency 'androidx.core:core-ktx:1.17.0' requires Android Gradle plugin 8.9.1 or higher" | Jetpack | Kotlin | Android Studio

C++ game (for Android phone) in Android Studio | Android NDK, OpenGL ES

• What is Android NDK for Android phone? This is the C++ library for the Android phone.

• What is Android OpenGL ES for Android phone? This is the C++ graphics library for the Android phone.

• Create a project "Android Native C++ Game" for the phone | Android Studio, Android NDK, OpenGL ES, C++

• Drawing a lake by points for the 2D game

• Drawing an enemy airplane as a vector graphic in Adobe Illustrator. I take the coordinates of the points from Adobe Illustrator and add them to my 2D game on C++ OpenGL

• Compile and run "Android Native C++ Game" in Android Studio on a computer (Windows) in Android Device emulator mode

• Error "[CXX1405] error when building with cmake using CMakeLists.txt: C build system [configure] failed while executing cmake.exe" when compiling Android Native C++ an application to Android Studio on computer (Windows)

• Error "ninja: error: rebuilding 'build.ninja': subcommand failed" when compiling Android Native C++ an application to Android Studio on computer (Windows)

• Draw a triangle with paint inside in "Android Native C++ Game" for phone | Android Studio, Android NDK, OpenGL ES v1, C++

• Download bmp file from Assets and draw textures in "Android Native C++ Game" for your phone | Android Studio, Android NDK, OpenGL ES v2 (shader), C++

• How to get bmp file located in Assets inside apk file ? | Android Studio, NDK, C++

• How to use alpha transparency in displaying texture using OpenGL? | Android Studio, OpenGL ES, NDK, C++

• Why does glTexImage2D return error code 1280? | Android Studio, OpenGL ES, NDK, C++

• What are cpp and h files in C++? | Android Studio, NDK, C++

• How to create new h file and add to project android NDK C++? | Android Studio, NDK, C++

• How to create new cpp file and add to project android NDK C++? | Android Studio, NDK, C++, CMakeLists.txt

• dynamic_cast in C++ (converting a pointer to a different type and checking validity in runtime) | Android Studio, NDK, C++

• std::map<Key, Value> is a set of keys and values in C++. | Android Studio, NDK, C++

• Pass a function as a parameter to a function (callback) | C++ | Android Studio, NDK, C++

• How to find event when display rotated (changed orientation) in Android phone | Android Studio, NDK, C++

• How to handle events in Android phone (create/terminate window event, set focus, lost focus, touch in phone) | Android Studio, NDK, C++

• Create a signed apk file in Android Studio | Android NDK, OpenGL ES

Google Play Console (for developer)

• Creating a Google Play account developer | Google Play Console

• The developer in Google Play Console needs to verify the identity | Google Play Console

• The developer in Google Play Console needs to confirm developer account | Google Play Console

• Developer account is not in use | Developer account is at risk of being closed | Google Play Console

• Compile app and send it for production in Google Play Console | My app in Google Play Console

• Policy status "Invalid Privacy policy" | Provide link to a valid privacy policy page | My app in Google Play Console

• Policy status "App must target Android 15 (API level 35) or higher" | Status "You won't be able to release app updates" | My app in Google Play Console

• Policy status "App must target Android 14 (API level 34) or higher" | Status "You won't be able to release app updates" | My app in Google Play Console

• Policy app content "Remove Photo and video permissions permission or submit declaration" | My app in Google Play Console

• Create an application in Google Play Console (in the option I select that it will be a game) | My game in Google Play Console

• Important parameters: package, applicationId, versionCode, versionName, android:label (in AndroidManifest.xml, build.gradle) to create a test version for Google Play Console | My game in Google Play Console

• Create a signed .aab file in Android Studio | My game in Google Play Console

• Compile the game and send it for internal testing in Google Play Console | My game in Google Play Console

• Google automatically ran tests and made pictures, a report on how the game runs on different brands of phones | My game in Google Play Console

• How do I ask Google Play Developer Console a support question?

• Google Play Developer Console support feedback

• Topics about Google Play Billing & in-app purchase | Google Play Console

• Can I use (integrate) payments in my Google game if I am a developer from Belarus? | Monetization in Google Play Console

• How can I change the Google Play Console language? | Google Chrome

• How to change country in payments profile? | Google Play Console

• How do I view (open) a payment page in Google Play? | Google Play Console

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