Fragment DrawerLayout


I am new to android and I have implemented android studios drawerlayout. I designed the main page of my app in content_main. But now I want to switch pages by using the DrawerLayout to connect me to my CurrentSongsFragment that I created. Here is the code that is in my MainActivity.java class:

public class MainActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); setSupportActionBar(toolbar); DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); ActionBarDrawerToggle toggle = new ActionBarDrawerToggle( this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close); drawer.setDrawerListener(toggle); toggle.syncState(); NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view); navigationView.setNavigationItemSelectedListener(this); } @Override public void onBackPressed() { DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); if (drawer.isDrawerOpen(GravityCompat.START)) { drawer.closeDrawer(GravityCompat.START); } else { super.onBackPressed(); } } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { // Handle action bar item clicks here. The action bar will // automatically handle clicks on the Home/Up button, so long // as you specify a parent activity in AndroidManifest.xml. int id = item.getItemId(); return super.onOptionsItemSelected(item); } @SuppressWarnings("StatementWithEmptyBody") @Override public boolean onNavigationItemSelected(MenuItem item) { // Handle navigation view item clicks here. int id = item.getItemId(); if (id == R.id.nav_camera) { setContentView(R.layout.fragment_current_song); } DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); drawer.closeDrawer(GravityCompat.START); return true; } }

Here is what's in my CurrentSongsFragment.java class:

public class CurrentSongFragment extends android.app.Fragment { @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { return inflater.inflate(R.layout.activity_main, container, false); } }

I am really struggling on how to switch the screens to show different content when I click on the fragment in the DrawerLayout. Help on this would be excellent(Let me know if I need to provide other code to be able to solve the solution) :D


Put this layout in your activity_main

<RelativeLayout android:id="@+id/fragment_container" android:layout_width="match_parent" android:layout_height="match_parent" />

and to add different fragment

public void addYourFragment(){ YourFragment myFragment = new YourFragment(); FragmentManager fragmentManager = this.getSupportFragmentManager(); FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction(); fragmentTransaction.replace(R.id.fragment_container, myFragment, tagToUniqlyIdentifiedFramgent); fragmentTransaction.addToBackStack(tagToUniqlyIdentifiedFramgent); fragmentTransaction.commit(); } @Override public boolean onNavigationItemSelected(@NonNull MenuItem item) { int id = item.getItemId(); Intent nextIntent; switch (id){ case R.id.item1: addYourFragment(); break; case R.id.item2: addYourFragmentTwo() break; case R.id.item3: addYourFragmentThree() break; } drawer.closeDrawer(GravityCompat.START); return true; }