android.app.FragmentManager#beginTransaction ( )源码实例Demo

private void replaceFragmentAWithB() {
    FragmentManager fragmentManager = getFragmentManager();
    Fragment fragment = fragmentManager.findFragmentByTag(FragmentB.TAG);
    if (null == fragment) {
        FragmentB fragmentB = new FragmentB();
        Log.i(LOG_TAG, "do add fragmentB action");
        FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
        fragmentTransaction.replace(R.id.replace_container, fragmentB, FragmentB.TAG)
                .addToBackStack(FragmentB.TAG)
                .commit();

        // if we replace() without addToBackStack(), FragmentA will destroyed and detach.
        // But then remove FragmentB, A's view is still shown, although A is destroyed.

        // if we replace() with addToBackStack(), FragmentA will go till onDestroyView()
        // when back pressed, FragmentB will be detached, and A will resume.
    }
}
 

@Override
   protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_custom);

	headersFragment = new CustomHeadersFragment();
	rowsFragment = new CustomRowsFragment();

	FragmentManager fragmentManager = getFragmentManager();
	FragmentTransaction transaction = fragmentManager.beginTransaction();
	transaction
		.replace(R.id.header_container, headersFragment, "CustomHeadersFragment")
		.replace(R.id.rows_container, rowsFragment, "CustomRowsFragment");
	transaction.commit();

	fragments = new LinkedHashMap<Integer, CustomRowsFragment>();

	for (int i = 0; i < CATEGORIES_NUMBER; i++) {
		CustomRowsFragment fragment = new CustomRowsFragment();
		fragments.put(i, fragment);
	}
}
 

/**
 * Callback method to be invoked when an item in this AdapterView has been clicked.
 *
 * @param parent   The AdapterView where the click happened.
 * @param view     The view within the AdapterView that was clicked (this will be a view provided by the adapter)
 * @param position The position of the view in the adapter.
 * @param id       The row id of the item that was clicked.
 */
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
                        long id) {
    FragmentManager manager = getFragmentManager();
    FragmentTransaction transaction = manager.beginTransaction();
    Bundle args = new Bundle();
    args.putStringArrayList("galleryList", galleryPath);
    args.putInt("currPos", position);
    galleryPreview.setArguments(args);
    transaction.replace(R.id.frame_container, galleryPreview);
    // add the current transaction to the back stack:
    transaction.addToBackStack("galleryList");
    transaction.commit();

}
 

private boolean stopCamera(CallbackContext callbackContext) {
  if(webViewParent != null) {
    cordova.getActivity().runOnUiThread(new Runnable() {
      @Override
      public void run() {
        ((ViewGroup)webView.getView()).bringToFront();
        webViewParent = null;
      }
    });
  }

  if(this.hasView(callbackContext) == false){
    return true;
  }

  FragmentManager fragmentManager = cordova.getActivity().getFragmentManager();
  FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
  fragmentTransaction.remove(fragment);
  fragmentTransaction.commit();
  fragment = null;

  callbackContext.success();
  return true;
}
 

/**
 * The sole constructor for {@code HtmlDialog}.
 *
 * @param fm  The {@code FragmentManager} from the calling activity that is used
 *            internally to show the {@code DialogFragment}.
 */
public HtmlDialog(FragmentManager fm)
{
    // See if there are any DialogFragments from the FragmentManager
    FragmentTransaction ft = fm.beginTransaction();
    Fragment prev = fm.findFragmentByTag(HtmlDialogFragment.TAG_HTML_DIALOG_FRAGMENT);

    // Remove if found
    if (prev != null)
    {
        ft.remove(prev);
        ft.commit();
    }

    mFragmentManager = fm;
}
 

/**
 * Opens the content browser that shows the user's maps.
 */
private void showContentBrowser() {
	FragmentManager fragmentManager = getFragmentManager();
	Fragment browseFragment = fragmentManager.findFragmentByTag(ContentBrowserFragment.TAG);
	if (browseFragment == null) {
		browseFragment = new ContentBrowserFragment();
	}

	if (!browseFragment.isVisible()) {
		FragmentTransaction transaction = fragmentManager.beginTransaction();
		transaction.add(R.id.maps_app_activity_content_frame, browseFragment, ContentBrowserFragment.TAG);
		transaction.addToBackStack(null);
		transaction.commit();

		invalidateOptionsMenu(); // reload the options menu
	}

	mDrawerLayout.closeDrawers();
}
 

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
  //1.����Fragment����
    fragment01 = new Fragment01();
	//2.��ȡFragment������
	FragmentManager fm = getFragmentManager();
	//3.������
	FragmentTransaction ft = fm.beginTransaction();
	//4.������ʾfragment01
	//arg0:������id��Ҳ����֡����
	ft.replace(R.id.fl, fragment01);
	//5.�ύ
	ft.commit();
}
 

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_setting);
    Toolbar my_toolbar = (Toolbar) findViewById(R.id.my_toolbar);
    initToolbar();

    FragmentManager fragmentManager = getFragmentManager();
    FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
    SettingFragment settingFragment = new  SettingFragment();
    fragmentTransaction.replace(R.id.id_content, settingFragment);
    fragmentTransaction.commit();


}
 

@Override
/* @inheritDoc */
   public void openDialogFragment(String fragmentTag, DialogFragment fragment) {
       Activity activity = getActivity();
       if (activity != null) {
           FragmentManager fragmentMgr = activity.getFragmentManager();
           FragmentTransaction ft = fragmentMgr.beginTransaction();
           DialogFragment oldFragment = (DialogFragment) fragmentMgr
                   .findFragmentByTag(fragmentTag);
           if (oldFragment == null) {
               fragment.show(ft, fragmentTag);
           }
       }
   }
 

@SuppressLint("ResourceType")
public static SearchFragment getFragmentInstance(FragmentManager fm, String tag){
    SearchFragment fragment = (SearchFragment)fm.findFragmentByTag(tag);

    if(fragment == null){
        fragment = new SearchFragment();

        FragmentTransaction ft = fm.beginTransaction();
        ft.replace(R.id.fragment, fragment, tag).commitAllowingStateLoss();
    }
    return fragment;
}
 

public void click2(View v){
	//��ʾfragment02
	//1.����Fragment����
	Fragment02 fragment02 = new Fragment02();
	//2.��ȡFragment������
	FragmentManager fm = getFragmentManager();
	//3.������
	FragmentTransaction ft = fm.beginTransaction();
	//4.������ʾfragment02
	//arg0:������id��Ҳ����֡����
	ft.replace(R.id.fl, fragment02);
	//5.�ύ
	ft.commit();
}
 

public static void showAboutDialog(Activity activity) {
    FragmentManager fm = activity.getFragmentManager();
    FragmentTransaction ft = fm.beginTransaction();
    Fragment prev = fm.findFragmentByTag("dialog_about");
    if (prev != null) {
        ft.remove(prev);
    }
    ft.addToBackStack(null);

    new AboutDialog().show(ft, "dialog_about");
}
 

public static void show(FragmentManager fm, Intent includeApps) {
    final Bundle args = new Bundle();
    args.putParcelable(EXTRA_INCLUDE_APPS, includeApps);

    final RootsFragment fragment = new RootsFragment();
    fragment.setArguments(args);

    final FragmentTransaction ft = fm.beginTransaction();
    ft.replace(R.id.container_roots, fragment);
    ft.commitAllowingStateLoss();
}
 

private void showInfo ()
{
 FragmentManager fm = getFragmentManager();
 FragmentTransaction ft = fm.beginTransaction();
 ft.hide(fm.findFragmentById(R.id.status_list));
 ft.show(fm.findFragmentById(R.id.info_screen));
 ft.hide(fm.findFragmentById(R.id.device_list));
 
  ft.commit();
}
 

private void showDialogFragment(final FragmentManager fragmentManager,
                                final DialogFragment dialogFragment,
                                final boolean addToBackStack,
                                final String tag) {
    final FragmentTransaction transaction = fragmentManager.beginTransaction();
    transaction.add(dialogFragment, tag);
    if (addToBackStack) {
        transaction.addToBackStack(tag);
    }
    transaction.commitAllowingStateLoss();
}
 

/**
 * Fragment の遷移.
 * @param f Fragment
 */
private void moveFragment(final Fragment f) {
    FragmentManager fm = getFragmentManager();
    FragmentTransaction t = fm.beginTransaction();
    t.setTransition(FragmentTransaction.TRANSIT_NONE);
    t.replace(android.R.id.content, f);
    t.addToBackStack(null);
    t.commit();
}
 

/**
 * The {@code fragment} is added to the container view with id {@code frameId}. The operation is
 * performed by the {@code fragmentManager}.
 */
public static void addFragmentToActivity(@NonNull FragmentManager fragmentManager,
                                         @NonNull Fragment fragment, int frameId) {
    checkNotNull(fragmentManager);
    checkNotNull(fragment);
    FragmentTransaction transaction = fragmentManager.beginTransaction();
    transaction.add(frameId, fragment);
    transaction.commit();
}
 

private void showNearby ()
{
 FragmentManager fm = getFragmentManager();
 FragmentTransaction ft = fm.beginTransaction();
 ft.hide(fm.findFragmentById(R.id.status_list));
 ft.hide(fm.findFragmentById(R.id.info_screen));
 ft.show(fm.findFragmentById(R.id.device_list));
 
  ft.commit();
}
 

public static void show(FragmentManager fm, Intent includeApps) {
    final Bundle args = new Bundle();
    args.putParcelable(EXTRA_INCLUDE_APPS, includeApps);

    final RootsFragment fragment = new RootsFragment();
    fragment.setArguments(args);

    final FragmentTransaction ft = fm.beginTransaction();
    ft.replace(R.id.container_roots, fragment);
    ft.commitAllowingStateLoss();
}
 

public static void show(FragmentManager fm) {
    final HomeFragment fragment = new HomeFragment();
    final FragmentTransaction ft = fm.beginTransaction();
    ft.replace(R.id.container_directory, fragment, TAG);
    ft.commitAllowingStateLoss();
}