What are fragments?
You can read more about fragments in
http://developer.android.com/guide/components/fragments.html
Creating fragments
Like Activities,fragments also have their Life cycle callback methods.
To create a fragment you need to override at least its "onCreateView(Bundle)".This method has to return a view and that view is the root of your fragments layout.
Steps to create fragments
Step1:Create a layout XML file(simple_text_fragment.xml)
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<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView" />
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Large Text"
android:textAppearance="?android:attr/textAppearanceLarge" />
</LinearLayout>
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Step 2:Create a class that extends Fragment and Override its onCreateView method
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public class Example_fragment extends Fragment {
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
Log.v("Fragments","onAttach");
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.v("Fragments","onCreate");
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
Log.v("Fragments","onCreateView");
//1st Arg:Fragments Layout
//2nd Arg:container(parent)
//3rd Arg:Boolean arg indicating whether the fragment layout should be attached to the viewGroup(2nd Arg).In our case,it is no as the system itself is doing it.
return inflater.inflate(R.layout.simple_text_fragment,container,false);
}
@Override
public void onStart() {
super.onStart();
Log.v("Fragments","onStart");
}
@Override
public void onResume() {
super.onResume();
Log.v("Fragments","onResume");
}
@Override
public void onPause() {
super.onPause();
Log.v("Fragments","onResume");
}
@Override
public void onStop() {
super.onStop();
Log.v("Fragments","onResume");
}
@Override
public void onDestroyView() {
super.onDestroyView();
}
@Override
public void onDestroy() {
super.onDestroy();
}
@Override
public void onDetach() {
super.onDetach();
}
}
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Step 3:
In you parent layout's XML file include the below snippet
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<fragment
android:name="com.example.apidemo.Example_fragment"
android:id="@+id/myfragment"
android:layout_width="wrap_content"
android:layout_height="match_parent"
/>
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Step 4:
Create Root Activity that inflates parents layout XML.
That's it.Your activity should look something similar like this
Happy Coding,
-Rajeev
