This can be achieved by passing a request code through to the intent when it is launched.

Since all intents from a single activity will result in a call to the same onActivityResult() method, a mechanism is required to identify which intent triggered the call. When the work of the intent is complete, the application will be notified by a call to a method named onActivityResult(). Invariably this will result in the framework displaying the storage picker user interface so that the user can specify the storage location (such as a directory on Google Drive and the name of a file). Working with files in the Storage Access Framework involves triggering a variety of intents depending on the specific action to be performed. Using the Attributes tool window, configure the onClick property on the Button widgets to call methods named newFile, openFile and saveFile respectively. Select the Plain Text widget in the layout, delete the current text property setting so that the field is initially blank and set the ID to fileText, remembering to extract all the string attributes to resource values: Use the Infer Constraints button in the Layout Editor toolbar to add any missing constraints. Next, position a Plain Text widget so that it is centered horizontally and positioned beneath the center Button so that the user interface layout matches that shown in Figure 70-1. The third Button widget should then be placed so that the top and right-hand margin guidelines appear.Ĭhange the text attributes on the three buttons to “New”, “Open” and “Save” respectively. Position a second Button such that the center and top margin guidelines appear.

With the tool in Design mode, select and delete the Hello World! TextView object.ĭrag and position a Button widget in the top left-hand corner of the layout so that both the left and top dotted margin guidelines appear before dropping the widget in place. Within the Project tool window, navigate to the activity_storage_demo.xml layout file located in app -> res -> layout and double-click on it to load it into the Layout Editor tool. The user interface will need to be comprised of three Button views and a single EditText view.

Android studio intent settype