Static fragment
- Static fragment is a fragment that can't be change during runtime.
- It uses <fragment> widget from Android Studio.
- Only .xml file.
- Nothing need to be declared in MainActivity.java
Dynamic fragment
- Dynamic fragment is a fragment that can be change during runtime.
- It uses FrameLayout widget to be a container for it.
- It needed to be declare in the MainActivity.java
For example,
Dynamic fragment sample code:
//MainActivity.java
public class MainActivity extends AppCompatActivity
{
//set as public static, so it can be use in other fragment activity too
public static FragmentManager frag_manager;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
frag_manager = getSupportFragmentManager;
//the FrameLayout id = fragContainer in activity_main.xml
if (findViewById(R.id.fragContainer) != null)
{
//if the item is saved, which means that there is already a item there
if (savedInstanceState != null)
{
return;
}
//begin the transaction for fragment
FragmentTransaction frag_trans = frag_manager.beginTransaction();
//declare the first fragment item, which is the FirstFrag.java
FirstFrag first_frag = new FirstFrag();
//add the first_frag.xml to the FrameLayout container
frag_trans.add(R.id.fragContainer,first_frag,false);
//commit the fragment
frag_trans.commit();
}
}
}
The code above will add the fragment into a FrameLayout container. The fragment inside the container can be change, eg. currently is first_frag.xml in FirstFrag.java, but it can be chage to second.frag.xml in SecondFrag.java too, a button can be add to perform the change of fragement during runtime.
