hello everyone, I'm just starting to learn how to program in Android. However, I had a problem with emulator, but I fixed, and here come my question. in the ( layout ) Folder there are two xml files and I'm not sure why.
Note: When I create an ( Android Application Project ) they both created automatically
The first one: activity_main.xml
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/container" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="com.example.m003.MainActivity" tools:ignore="MergeRootFrame" />
The second fragment_main.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context="com.example.m003.MainActivity$PlaceholderFragment" > <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/hello_world" /> </RelativeLayout>
Could any tell me what is the different between these two.
Also another thing, why another package is created with one that I all ready created? every time I create a new ( Android Application Project ). what I mean that in the ( src ) Folder I have one package, and in the ( gen ) there is another one. why I would need both of them ?