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#Android studio update textview every second android#The latest version of Android requires that App Links be declared for both HTTP and HTTPS protocols, even if only one is being used. Check that the URL is correctly formatted and assigned to the appropriate activity by entering the following URL into the Check URL Mapping field of the mapping screen (where is set to the domain specified in the Host field above) : If the mapping is configured correctly, LandmarkActivity will be listed as the mapped activity: Since the path in this example is a prefix to the landmark ID component, select the pathPrefix menu option.įinally, use the Activity menu (C) to select LandmarkActivity as the activity to be launched in response to the app link:Īfter completing the settings in the dialog, click on the OK button to commit the changes. pathPattern – Allows the path to be specified using pattern matching in the form of basic regular expressions and wildcards, for example landmarks/*/ondon/*.Additional path components may be included after the /landmarks component (for example will still be considered a match). pathPrefix – The specified path is only considered as the prefix.A URL of, however, will not be considered a match. If the path is set to /landmarks, for example, will be considered a match. path – The URL must match the path component of the URL exactly in order to launch the activity. ![]() The Path menu (B) provides the following three path matching options: The path must be prefixed with / so enter /landmarks into this field. The Path field (marked A in Figure 82-5 below) is where the path component of the URL is declared. In the Host field of the Add URL Mapping dialog, enter either the domain name for your website or if you do not have one. Within the mapping screen, click on the ‘+’ button (highlighted in Figure 82-4) to add a new URL: Once open, the assistant should appear as shown in Figure 82-3:Ĭlick on the Open URL Mapping Editor button to begin mapping a URL to an activity. To add a URL mapping to the project, begin by opening the App Links Assistant using the Tools -> App Links Assistant menu option. For this example, the format of the URL will be as follows: When all of the steps have been completed, the following URL should, for example, cause the app to display information for the Tower of London: This is achieved by mapping a URL to LandmarkActivity. The objective is for the LandmarkActivity screen to launch and display information in response to an app link click. Now that the app has been loaded into Android Studio and tested, the project is ready for the addition of app link support. This information is used by LandmarkActivity to extract the record from the database and display it to the user using the screen shown in Figure 82-2. This information takes the form of extra data added to the Intent object. When a matching record is found, the second activity (LandmarkActivity) is launched and passed information about the record to be displayed. Test the search feature by entering londonbridge into the ID field and clicking the Find button. ![]() The default database configuration currently contains two records referenced by the IDs “londonbridge” and “toweroflondon”. ![]() Once the app is launched, the screen illustrated in Figure 82-1 below will appear:Īs currently implemented, landmarks are located using the ID for the location. Having located the folder, open it within Android Studio and run the app on a device or emulator. #Android studio update textview every second archive#The project is contained within the AppLinking folder of the sample source code download archive located at the following URL: The goal of this chapter is to enhance the app to add support for app linking so that URLs can be used to display specific landmark records within the app. When a search locates a matching record, LandmarkActivity launches and displays the information for the related landmark. This activity allows the user to enter search criteria and to add additional records to the database. ![]() AppLinkingActivity is the main activity launched at app startup. The project consists of two activities named AppLinkingActivity and LandmarkActivity. In its current form, the app allows the existing records to be searched and new records to be added and deleted. In addition to the existing database entries, the app also lets the user add and delete landmark descriptions. The app is provided with an existing database containing a set of records for some popular tourist attractions in London. The app uses a SQLite database accessed through a standard Android content provider class. The project used in this chapter is named AppLinking and is a basic app designed to allow users to find out information about landmarks in London. ![]()
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