Android Example with Fragment and ToolBar
# layout
- activity_main.xml
```
<?xml version="1.0" encoding="utf-8"?>
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity"
>
<androidx.appcompat.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
>
<TextView
android:id="@+id/toolbar_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="List"
android:textSize="30dp"
android:layout_gravity = "center"
/>
</androidx.appcompat.widget.Toolbar>
<fragment
android:id="@+id/fragment"
android:layout_width="match_parent"
android:layout_height="0dp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintTop_toBottomOf="@id/toolbar"
android:name="com.tmoney.taxi.toolbarexample.ListFragment"
>
</fragment>
</androidx.constraintlayout.widget.ConstraintLayout>
```
- fragment_detail.xml
```
<?xml version="1.0" encoding="utf-8"?>
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:background="#ff5500"
>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TEST TEST"
android:textSize="50dp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
/>
</androidx.constraintlayout.widget.ConstraintLayout>
```
- fragment_list.xml
```
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:background="#00aaff"
>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="LIST 화면"
android:textSize="50dp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
/>
</androidx.constraintlayout.widget.ConstraintLayout>
```
# JAVA Code
- DetailFragment.java
```
public class DetailFragment extends Fragment {
public DetailFragment() {
}
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_detail, container, false);
}
}
```
- ListFragment.java
```
public class ListFragment extends Fragment {
public ListFragment() {
}
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_list, container, false);
}
}
```
- MainActivity.java
```
public class MainActivity extends AppCompatActivity {
private ListFragment listFragment;
private DetailFragment detailFragment;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar)findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayShowTitleEnabled(false);
listFragment = (ListFragment)getSupportFragmentManager().findFragmentById(R.id.fragment);
detailFragment = new DetailFragment();
}
// toolbar에 표시하기
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.toolbar_menu, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
getSupportActionBar().setDisplayHomeAsUpEnabled(false);
Log.d("TEST", "home icon click");
// 기존 프래그먼트를 사용하면서 에러남..
changeFragment(listFragment);
return true;
case R.id.option:
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
Log.d("TEST", "option icon click");
changeFragment(detailFragment);
return true;
default:
return super.onOptionsItemSelected(item);
}
}
public void changeFragment (Fragment fragment) {
FragmentManager fm = getSupportFragmentManager();
FragmentTransaction fragmentTransaction = fm.beginTransaction();
fragmentTransaction.setCustomAnimations(R.anim.enter_from_right, R.anim.exit_to_right);
fragmentTransaction.replace(R.id.fragment, fragment);
fragmentTransaction.addToBackStack(null);
fragmentTransaction.commit();
}
}
```