SetContentView (): Set up the app’s user interface. You can consider your object or ID to this method as an argument.
Example:
[php] setContentView (R.layout.activity _ hello _ say); [/php]Or
[php]Textview tv = new TextView (this); tv.setText ("Hello app developer!"); setContentView (tv); [/php]Information about the parameters “R.layout.activity _ hello _ say.”
“R” is the name of a class that is automatically created for the project and whose job is resource management.
To learn the value of “activity _ hi _ say,” click right mouse button and in the context menu the command “Goto > Implementations.”
The “activity _ hello _ say”-ID comes from the resource file “activity _ hello _ sagen.xml.” Located in the subdirectory “app/res/layout”
In this example, “hardcoded …”
[php] <TextView android: Layout _ width = "wrap _ content" android: Text = "Hello World" /> [/php]
To outsource “hardcoded” string in resource file “String.xml …” Right mouse button … “Extract string”