Before you start, there are two fundamental concepts that you need to understand about Android apps: how they provide multiple entry points, and how they adapt to different devices. Android apps are built as a combination of components that can be invoked individually. For example, an activity is a type of app component that provides a user interface UI.
The "main" activity starts when the user taps your app's icon. You can also direct the user to an activity from elsewhere, such as from a notification or even from a different app. Other components, such as WorkManager , allow your app to perform background tasks without a UI. After you build your first app, you can learn more about the other app components at Application fundamentals. Android allows you to provide different resources for different devices. For example, you can create different layouts for different screen sizes.
The system determines which layout to use based on the screen size of the current device. If any of your app's features need specific hardware, such as a camera, you can query at runtime whether the device has that hardware or not, and then disable the corresponding features if it doesn't. You can specify that your app requires certain hardware so that Google Play won't allow the app to be installed on devices without them.
After you build your first app, learn more about device configurations at Device compatibility overview. With these two basic concepts in mind, you have two options. If you prefer staying in the main documentation, which makes it easy to branch off to other topics to learn more about specific aspects of building an app, you can proceed to the next lesson to build your first app.
However, if you like to follow step-by-step tutorials that explain every step from beginning to end, then consider the Android Basics in Kotlin course. Content and code samples on this page are subject to the licenses described in the Content License. App Basics. Build your first app. App resources. Resource types. App manifest file. Device compatibility. Multiple APK support. Tablets, large screens, and foldables. Build responsive UIs.
Build for foldables. Getting started. Handling data. User input. Watch Face Studio. Health services. Creating watch faces. Android TV. Build TV Apps. Build TV playback apps. Help users find content on TV. Recommend TV content. Watch Next. Build TV games. Build TV input services. TV Accessibility. Android for Cars. Build media apps for cars. Build navigation, parking, and charging apps for cars.
Android Things. Supported hardware. Advanced setup. Build apps. Create a Things app. Communicate with wireless devices. Configure devices. Interact with peripherals. Build user-space drivers. Manage devices. Create a build. Push an update. Chrome OS devices. App architecture. Architecture Components. UI layer libraries.
View binding. Data binding library. Lifecycle-aware components. Paging Library. Paging 2. Data layer libraries. How-To Guides. Advanced Concepts. Threading in WorkManager. App entry points. App shortcuts.
App navigation. Navigation component. App links. Dependency injection. Core topics. App compatibility. Interact with other apps.
Package visibility. Intents and intent filters. User interface. Add motion to your layout with MotionLayout. MotionLayout XML reference. Improving layout performance. Custom view components. Look and feel. Splash screens. Add the app bar. Control the system UI visibility. Supporting swipe-to-refresh.
Pop-up messages overview. Adding search functionality. Creating backward-compatible UIs. Home channels for mobile apps. General consumers should ideally stay away from them just to be on the safer side. However, if you would like to tinker with manual Android installation techniques on an older eligible smartphone lying around, these steps could be useful for you.
In case you would like to do the same, but for a newer version of Android Android 12 , check the link below. As mentioned above, please be aware that this step is not mandatory but just a tip. Installing a new software version can cause errors that did not exist before. Whenever you want to make any major changes to the system of your Android smartphone, it is advisable to reset it and back it up beforehand.
We recommend a manual installation of Android 10 for experts only! It is still an unstable version, which could make it more difficult to use the device. To flash the new Android version, you first have to open the bootloader and activate it via the developer options and the USB debug mode:. Now all you have to do is download the Android 10 factory images, which vary from device to device. On this page, you will find links to the supported devices:. Before you can proceed with the actual installation, you need to unzip the zip files, including those found in the unzipped files - i.
Now you can continue with the installation:. Your phone will automatically restart with the new version of Android 10, and if the process is unsuccessful, read the section about possible problems that occurred during the process. If you encountered a problem before installing, make sure you have activated USB debug mode and unlocked the boot loader.
If you are in a boot loop, you can first attempt to clear the cache partition by returning to the boot loader and using the volume keys to switch to recovery mode press the power key to confirm. After you have deleted the cache partition, the device will restart. This way, you should be able to solve the problem. If you receive an error message at the command prompt informing you that the file system.
Make sure that you have clicked on flash-all. Now, if the OS is doing what I want, and 9 is, I don't even bother to root. I'll just wait. The only option I even turn on these days is developer options. At the end of the work day, I rarely touch my phone. Guess I'm getting old. I'm still on lineage with almost daily updates, with Samsung sm-gf kccat6, removable battery and root.
Using twrp, titanium backup pro, magisk and I don't want a phone not rooted. I guess I'm getting old too. Please click here if you are not redirected within a few seconds. Mobility News E-Bikes. When will I receive the update to Android 10? How to install Android 10 as an OTA update How to install Android 10 manually Problems and solutions when installing Android 10 Android The story so far Google officially released Android 10 in September , and it was initially available for several Google Pixel devices.
On which devices can I install Android 10? Also read: Android 10 is out: ready to enjoy the sugar-free version of Android? Also read: Is your smartphone compatible with Android 10? Android 10 is officially out for many smartphones. How to install Android 12 beta on your phone How to install Android 10 manually 1. Reset before installing the update As mentioned above, please be aware that this step is not mandatory but just a tip. How to factory reset your Android phone We recommend a manual installation of Android 10 for experts only!
Unlocking the bootloader To flash the new Android version, you first have to open the bootloader and activate it via the developer options and the USB debug mode: How to install ADB and Fastboot 3.
Downloading from the Factory Images Now all you have to do is download the Android 10 factory images, which vary from device to device. Installing Android 10 on your computer Before you can proceed with the actual installation, you need to unzip the zip files, including those found in the unzipped files - i. Now check if the device number appears in the list of connected devices, and everything is done!
Install Android 10 on your smartphone Turn off your device. Press and hold the Power and Quieter keys to restart the device in bootloader mode.
Double-click on the file flash-all. Double-click the file flash-all. Here are the solutions USB debugging If you encountered a problem before installing, make sure you have activated USB debug mode and unlocked the boot loader. Boot loop If you are in a boot loop, you can first attempt to clear the cache partition by returning to the boot loader and using the volume keys to switch to recovery mode press the power key to confirm.
Problems with ADB If you receive an error message at the command prompt informing you that the file system.
Copy and paste the files into the same folder where you saved the other unzipped files in the ADB-Tool folder next to adb. Img Fastboot Flash System. Did you manage to install Android 10 on your smartphone? Was it difficult?
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