A typical filter factory should use or merge the static JVM-wide filter with other application and context specific filters and the stream-specific filter, if one is set on the stream.
The filter factory implementation can also use any contextual information at its disposal, for example, extracted from the application thread context, or its call stack, to compose and combine a new filter. It is not restricted to only use its two parameters. Java Download. Last updated:. October 20, User rating:. It is not the default rendering engine, however there is an option to enable it by setting the following system property: sun.
Any disabled mechanism will be ignored if it is specified in the mechanisms argument of Sasl. The default value for this security property is empty, which means that no mechanisms are disabled out-of-the-box. New Checks on Trust Anchor Certificates New checks have been added to ensure that trust anchors are CA certificates and contain proper extensions.
Trust anchors are used to validate certificate chains used in TLS and signed code. Trust anchor certificates must include a Basic Constraints extension with the cA field set to true. Also, if they include a Key Usage extension, the keyCertSign bit must be set. A new system property named jdk. Download and install apk demo app. Ukuran aplikasi yang didownload oleh pengguna di.
Hidden Dimensions 3 by nulllgames from img. This simple example works for me for api Konsol java untuk android, editor dengan auto lengkap dan pembangun apk.
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. When prompted, grant authorizations. Step 7: Explore the app template When you created the project and selected Basic Activity , Android Studio set up a number of files, folders, and also user interface elements for you, so you can start out with a working app and major components in place.
Task: Explore the layout editor Generally, each screen in your Android app is associated with one or more fragments. What you'll learn How to use the layout editor. How to set property values. How to add string resources. How to add color resources. On the left is a Palette 1 of views you can add to your app. Try selecting the different modes. Depending on your screen size and work style, you may prefer switching between Code and Design , or staying in Split view.
If your Component Tree disappears, hide and show the Palette. My strategy is that as the user select the items and press download button, these items are passed into DownloadTask which is responsible for downloading a file. Then the download tasks are added into the totalDownloadQueue.
I know the intentservice is triggered by some defined action. But what I want to is to create a background service watching the totalDownloadQueue , if any new downloadtask is availabe, then some thread are called to operate the tasks.
What alternative class should I use? Please provide sample code along with the explanation, thanks. As I know, the initialization of the threads is only called by once. If I start the service at the beginning of the application and the threads should be killed as the user terminate the app. I mean when he swipe out the window. Do the threads exist after the user exit the application?
If this approach still can't resolve the issue about downloading files asynchronously? What other strategy should I adopt? Please provide some example code or reference so that I can modify on it. IntenService and AsyncTask provide a single worker thread, therefore simultaneous download of multiple images is not possible. However, i strongly suggest ThreadPoolExecutor for your requirements.
THreadPoolExecutor handles practically every aspect of threads management and its quite efficient. You create a single executor with the as in this code sample:. From the sound of it you might benefit from using the onProgressUpdate method from ASyncTask , which can keep you updated on progress. Maybe have a read through the class description -- it sounds like just what you need. It also comes with lots of sample code!
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