By Belen Cruz Zapata
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Extra info for Android Studio Essentials
Type Hierarchy: This opens a dialog that shows the type hierarchy of the selected object. • Method Hierarchy: This opens a dialog that shows the method hierarchy of the selected method. • Call Hierarchy: This opens a dialog that shows the call hierarchy of the selected method. • Next Highlighted Error: This navigates to the next error. • Previous Highlighted Error: This navigates to the previous error. • Next Method: This navigates to the next method. • Previous Method: This navigates to the previous method.
Change it to @+id/editText_name to distinguish it easily from other text fields. Check whether the component ID has also changed in the Component Tree window, as shown in the following screenshot: • text: This deletes the value of this field. The hint value should now be visible. [ 45 ] Creating User Interfaces If we switch to the text editor, we can see the XML definition of the text field with the properties we edited:
The most important elements of the application structure are in the app directory. java file, which contains references to the application resources. • libs/: This is a folder that contains the libraries referenced from our code. • src/androidTest/: This is a folder that contains the test classes of the Java classes that need to be tested. • src/main/: This is a folder that contains the sources of our application. All the files we usually work with are in this folder. The main folder is subdivided as follows: °° java/: This is a folder that contains Java classes organized as packages.
Android Studio Essentials by Belen Cruz Zapata