New PDF release: Android Studio Essentials

By Belen Cruz Zapata

ISBN-10: 1784397202

ISBN-13: 9781784397203

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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: From the text editor, the existing components and their properties can also be changed.

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.

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Android Studio Essentials by Belen Cruz Zapata


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