The built-in profiling tools provide realtime statistics for your app's CPU, memory, and network activity. Identify performance bottlenecks by recording method traces, inspecting the heap and allocations, and see incoming and outgoing network payloads.
See the Android Studio release notes. More downloads are available in the download archives. For information on recommended devices and specifications, as well as Android Emulator support, visit chromeos. If you're new to Android development, check out the following resources to get started. Build your first app Start writing code in Android Studio by following the tutorial to Build your first app.
Learn Android with interactive video training in the Android Fundamentals Udacity course. For help installing Android Studio, see the Install guide. Android Studio. Download What's new User guide Preview. Android Developers. Android Studio Android Studio provides the fastest tools for building apps on every type of Android device.
Download Not Available Your current device is not supported. Download options Release notes. More about the layout editor. More about the APK Analyzer. More about the emulator. It includes only the core SDK tools, which you can access from a command line or with a plugin for your favorite IDE if available.
Your download package is an executable file that starts an installer. Unpack the ZIP file you've downloaded. Move it to an appropriate location on your machine, such as a "Development" directory in your home directory. Make a note of the name and location of the SDK directory on your system—you will need to refer to the SDK directory later when using the SDK tools from the command line.
Unpack the. The SDK files are download separately to a user-specified directory. If you are running a bit distribution on your development machine, you need to install additional packages first. For Ubuntu For earlier versions of Ubuntu, install the ialibs package using apt-get :.
Except as noted, this content is licensed under Creative Commons Attribution 2. For details and restrictions, see the Content License. FileOutputStream; import java. Download from Service The big question here is: how do I update my activity from a service?
This is how the whole code would look like: The activity where you are showing the dialog Use DownloadManager class GingerBread and newer only GingerBread brought a new feature, DownloadManager , which allows you to download files easily and delegate the hard work of handling threads, streams, etc. Request Uri. Final thoughts First and second methods are just the tip of the iceberg. Make sure the directory were you are going to download files exist and has write permissions.
If download is too big you may want to implement a way to resume the download if previous attempts failed. Users will be grateful if you allow them to interrupt the download. Improve this answer. There is a problem in Cristian's answer. Because code at " 1. Use AsyncTask and show the download progress in a dialog " does connection. Suggested to close the streams input and output in finally instead of try , otherwise if any exception is thrown before close , you have unclosed streams hanging around.
Show 55 more comments. Ziem 6, 7 7 gold badges 50 50 silver badges 85 85 bronze badges. Mnightmare Mnightmare 1, 1 1 gold badge 10 10 silver badges 6 6 bronze badges. This is exactly my problem. Can you tell me how to do a timer task to update progressbar? How to get values updating from the AsyncTask running behind — user And when u restart the activity where u want to update ur UI run the UI thread.. The UI should have the fresh reference.. Like the newly initalized ProgressBar in my case — sheetal.
My device is Xperia P with Android 4. I've defined a static boolean variable that the onPreExecute sets it to true and the onPostExecute sets it to false. It shows that we are downloading or not, so we can check if the variable is equal to true, show the previous progressbar dialog. Show 2 more comments. VinceStyling VinceStyling 3, 2 2 gold badges 26 26 silver badges 42 42 bronze badges.
Does it support multiple file download? I'm working on a project that allow user to download scheduled. At a specific time 12 AM for instance , the service will download all the link that user selected before. I mean the service I need has to be able to queue download links, and then download all of them one by one or parallel, depend on user. Thank you — Hoang Trinh.
Great library! Raised an issue regarding that. PostExecute" ; mWakeLock. The Syrian The Syrian 3 3 silver badges 8 8 bronze badges. In part 2 Download from service Progress dialog can not display progress increment. Do not do it! There is Environment. Also don't forget to check if the external storage is mounted - Environment. Bhargav Rao Sam R. Raju yourPepe Raju yourPepe 2, 13 13 gold badges 60 60 silver badges bronze badges. Here is the whole method and the declaration of showCountTextView :.
So far, you've focused on the first screen of your app. Next, you will update the Random button to display a random number between 0 and the current count on a second screen. The screen for the new fragment will display a heading title and the random number. The R is just a placeholder. This TextView is constrained on all edges, so it's better to use a vertical bias than margins to adjust the vertical position, to help the layout look good on different screen sizes and orientations.
If you get a warning "Not Horizontally Constrained," add a constraint from the start of the button to the left side of the screen and the end of the button to the right side of the screen. Your app now has a completed layout for the second fragment.
But if you run your app and press the Random button, it may crash. The click handler that Android Studio set up for that button needs some changes. In the next task, you will explore and fix this error. When you created your project, you chose Basic Activity as the template for the new project. When Android Studio uses the Basic Activity template for a new project, it sets up two fragments, and a navigation graph to connect the two.
It also set up a button to send a string argument from the first fragment to the second. This is the button you changed into the Random button. And now you want to send a number instead of a string.
A screen similar to the Layout Editor in Design view appears. It shows the two fragments with some arrows between them. After a few moments, Android Studio should display a message in the Sync tab that it was successful:.
The Arguments section shows Nothing to show. In this step you'll change it to send a number for the current count. You will get the current count from the text view that displays it, and pass that to the second fragment. You have written the code to send the current count to the second fragment. The next step is to add code to SecondFragment. The intention of this codelab was to get you started building Android apps. We hope you want to know a lot more though, like how do I save data?
How do I run background tasks? How do I display a list of photos? How do I We encourage you to keep learning. We have more Android courses built by Google to help you on your learning journey. These interactive, video-based courses were created by Google experts in collaboration with Udacity. Take these courses at your own pace in your own time.
Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4. For details, see the Google Developers Site Policies. What you must know already This codelab is written for programmers and assumes that you know either the Java or Kotlin programming language.
What you'll learn How to use Android Studio to build your app. How to run your app on a device or in the emulator. How to add interactive buttons. How to display a second screen when a button is pressed. The installation is similar for all platforms. Any differences are noted below. Navigate to the Android Studio download page and follow the instructions to download and install Android Studio.
Accept the default configurations for all steps, and ensure that all components are selected for installation. After the install is complete, the setup wizard downloads and installs additional components, including the Android SDK. Be patient, because this process might take some time, depending on your internet speed.
When the installation completes, Android Studio starts, and you are ready to create your first project. Task: Create your first project In this step, you will create a new Android project for your first app. Here's what the finished app will look like: What you'll learn How to create a project in Android Studio. How to create an emulated Android device. How to run your app on the emulator.
How to run your app on your own physical device, if you have one. Step 1: Create a new project Open Android Studio. Select Basic Activity not the default. Click Next. Give your application a name such as My First App.
Make sure the Language is set to Java. Leave the defaults for the other fields. Click Finish. This is usually in a folder called AndroidStudioProjects below your home directory. Builds your project this may take a few moments. Android Studio uses Gradle as its build system. You can follow the build progress at the bottom of the Android Studio window. Opens the code editor showing your project. Step 2: Get your screen set up When your project first opens in Android Studio, there may be a lot of windows and panes open.
If there's a Gradle window open on the right side, click on the minimize button — in the upper right corner to hide it. Depending on the size of your screen, consider resizing the pane on the left showing the project folders to take up less space.
Step 3: Explore the project structure and layout The upper left of the Android Studio window should look similar to the following diagram: Based on you selecting the Basic Activity template for your project, Android Studio has set up a number of files for you.
Double-click the app 1 folder to expand the hierarchy of app files. See 1 in the screenshot. If you click Project 2 , you can hide or show the Project view.
Expand the manifests folder. The java folder contains three subfolders: com. It includes these subfolders: drawable : All your app's images will be stored in this folder.
Step 4: Create a virtual device emulator In this task, you will use the Android Virtual Device AVD manager to create a virtual device or emulator that simulates the configuration for a particular type of Android device. The first step is to create a configuration that describes the virtual device. The Select Hardware window shows a list of pre-configured hardware device definitions. Choose a device definition, such as Pixel 2 , and click Next. For this codelab, it really doesn't matter which device definition you pick.
In the System Image dialog, from the Recommended tab, choose the latest release. This does matter. If a Download link is visible next to a latest release, it is not installed yet, and you need to download it first. If necessary, click the link to start the download, and click Next when it's done. This may take a while depending on your connection speed. In the next dialog box, accept the defaults, and click Finish. The AVD Manager now shows the virtual device you added.
The icon will change when your app is already running. This menu also appears in the toolbar. Messages that might appear briefly in the status bar Gradle build running Waiting for target device to come on line Installing APK Launching activity Once your app builds and the emulator is ready, Android Studio uploads the app to the emulator and runs it.
Step 6: Run your app on a device if you have one What you need: An Android device such as a phone or tablet. A data cable to connect your Android device to your computer via the USB port. If you are using a Linux or Windows OS, you may need to perform additional steps to run your app on a hardware device.
Check the Run Apps on a Hardware Device documentation. On Windows, you may need to install the appropriate USB driver for your device. Return to the previous screen Settings.
Developer options appears at the bottom of the list. Tap Developer options. Enable USB Debugging. Now you can connect your device and run the app from Android Studio.
Connect your device to your development machine with a USB cable. On the device, you might need to agree to allow USB debugging from your development device. In Android Studio, click Run in the toolbar at the top of the window. The Select Deployment Target dialog opens with the list of available emulators and connected devices.
Select your device, and click OK. Android Studio installs the app on your device and runs it. Troubleshooting If you're stuck, quit Android Studio and restart it.
If Android Studio does not recognize your device, try the following: Disconnect your device from your development machine and reconnect it. Restart Android Studio. If your computer still does not find the device or declares it "unauthorized": Disconnect the device. Reconnect the device to your computer.
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