How to get back from a fragment to an activity?

One simple way to do this is to use the addToBackStack() . Here's how it should look:

FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction().replace(R.id.flContent, fragment)
    .addToBackStack("Fragment").commit();

So you can put a condition checking that the stack input dimension has a value greater than 0 . If yes, use the popBackStack() method, which will return the user to the previous fragment , otherwise it uses super.onBackPressed() . See:

@Override
public void onBackPressed() {
    if (getFragmentManager().getBackStackEntryCount() > 0 ){
        getFragmentManager().popBackStack();
    } else {
        super.onBackPressed();
    }
}

A GIF is worth more than a thousand images:

Thisprojectissavedas navDrawer in GitHub.

Using addToBackStack(null) is including the fragments in the navigation, causing the "Back Button" to display the previous fragment .

If you do not want to navigate backwards between the fragments open do not add transanction to backstack . Do not use addToBackStack(null) .

Change

fragmentManager.beginTransaction()
               .replace(R.id.frame_container, fragment)
               .addToBackStack(null)
               .commit();

for

fragmentManager.beginTransaction()
               .replace(R.id.frame_container, fragment)
               .commit();

However, if you want to keep navigating fragments and at the same time giving the possibility to return to the previous Activity, you must implement the "Up Button".

Follow the steps below:

• Declare which is the parent Activity of each Activity. This is done in AndroidManifist.xml using the android:parentActivityName attribute:

  <application ... >
      ...
  
      <!-- A main/home activity (não tem uma activity pai) -->
  
      <activity
          android:name="com.example.myfirstapp.MainActivity" ...>
          ...
      </activity>
  
      <!-- Uma activity filha da main activity -->
      <activity
          android:name="com.example.myfirstapp.MyChildActivity"
          android:label="@string/title_activity_child"
          android:parentActivityName="com.example.myfirstapp.MainActivity" >
  
          <!-- meta-data para suportar Android 4.0 ou inferior -->
          <meta-data
              android:name="android.support.PARENT_ACTIVITY"
              android:value="com.example.myfirstapp.MainActivity" />
      </activity>
  </application>
  

• Make the "Button Up" available / visible

  @Override
  public void onCreate(Bundle savedInstanceState) {
      ...
      getActionBar().setDisplayHomeAsUpEnabled(true);
  }
  

• Use the static method navigateUpFromSameTask() , from NavUtils, to navigate to the parent Activity:

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
      switch (item.getItemId()) {
      // Respond to the action bar's Up/Home button
      case android.R.id.home:
          NavUtils.navigateUpFromSameTask(this);
          return true;
      }
      return super.onOptionsItemSelected(item);
  }
  

For more information, see Providing Up Navigation in the documentation.

Other topics to read:

• Navigation with Back and Up .
• Implementing Effective Navigation .