Java Code Examples for androidx.fragment.app.FragmentManager#popBackStack()

public static void handleDismissFragment(@NonNull AwesomeFragment target, @NonNull AwesomeFragment presented, @Nullable AwesomeFragment top) {
    FragmentManager fragmentManager = target.requireFragmentManager();
    target.setAnimation(PresentAnimation.Modal);

    if (top == null) {
        top = (AwesomeFragment) fragmentManager.findFragmentById(target.getContainerId());
    }

    if (top == null) {
        return;
    }

    top.setAnimation(PresentAnimation.Modal);
    fragmentManager.beginTransaction().setMaxLifecycle(presented, Lifecycle.State.STARTED).commit();
    fragmentManager.popBackStack(presented.getSceneId(), FragmentManager.POP_BACK_STACK_INCLUSIVE);
    FragmentHelper.executePendingTransactionsSafe(fragmentManager);
    target.onFragmentResult(top.getRequestCode(), top.getResultCode(), top.getResultData());
}
 

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

    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar_open_channel);
    setSupportActionBar(toolbar);
    if (getSupportActionBar() != null) {
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        getSupportActionBar().setHomeAsUpIndicator(R.drawable.ic_arrow_left_white_24_dp);
    }

    if (savedInstanceState == null) {
        // Load list of Open Channels
        Fragment fragment = OpenChannelListFragment.newInstance();

        FragmentManager manager = getSupportFragmentManager();
        manager.popBackStack();

        manager.beginTransaction()
                .replace(R.id.container_open_channel, fragment)
                .commit();
    }
}
 

public static void addFragment(FragmentActivity fragmentActivity, Fragment fragmentToAdd,
                               String fragmentTag) {
    FragmentManager supportFragmentManager = fragmentActivity.getSupportFragmentManager();

    FragmentTransaction fragmentTransaction = supportFragmentManager
            .beginTransaction();
    fragmentTransaction.replace(R.id.layout_child_activity, fragmentToAdd,
            fragmentTag);

    if (supportFragmentManager.getBackStackEntryCount() > 1) {
        supportFragmentManager.popBackStack();
    }
    fragmentTransaction.addToBackStack(fragmentTag);
    fragmentTransaction.commitAllowingStateLoss();
    supportFragmentManager.executePendingTransactions();
}
 

public static boolean dispatchBackPressedEvent(FragmentManager fragmentManager) {
    List<Fragment> fragments = fragmentManager.getFragments();

    if (fragments == null)
        return false;

    for (int i = fragments.size() - 1; i >= 0; i--) {
        Fragment fragment = fragments.get(i);

        if (isBackPressedIntercepted(fragment)) {
            ((BackPressedListener) fragment).onBackPressed();
            return true;
        }
    }

    if (fragmentManager.getBackStackEntryCount() > 0) {
        fragmentManager.popBackStack();
        return true;
    }
    return false;
}
 

private void popToFragmentInternal(AwesomeFragment fragment, boolean animated) {
    FragmentManager fragmentManager = getChildFragmentManager();

    AwesomeFragment topFragment = getTopFragment();
    if (topFragment == null || topFragment == fragment) {
        return;
    }

    fragmentManager.beginTransaction().setMaxLifecycle(topFragment, Lifecycle.State.STARTED).commit();

    topFragment.setAnimation(animated ? PresentAnimation.Push : PresentAnimation.None);
    fragment.setAnimation(animated ? PresentAnimation.Push : PresentAnimation.None);
    fragmentManager.popBackStack(fragment.getSceneId(), 0);

    fragmentManager.beginTransaction().setMaxLifecycle(fragment, Lifecycle.State.RESUMED).commit();

    FragmentHelper.executePendingTransactionsSafe(fragmentManager);
    fragment.onFragmentResult(topFragment.getRequestCode(), topFragment.getResultCode(), topFragment.getResultData());
}
 

public static boolean dispatchBackPressedEvent(FragmentManager fragmentManager) {
    List<Fragment> fragments = fragmentManager.getFragments();

    if (fragments == null)
        return false;

    for (int i = fragments.size() - 1; i >= 0; i--) {
        Fragment fragment = fragments.get(i);

        if (isBackPressedIntercepted(fragment)) {
            ((BackPressedListener) fragment).onBackPressed();
            return true;
        }
    }

    if (fragmentManager.getBackStackEntryCount() > 0) {
        fragmentManager.popBackStack();
        return true;
    }
    return false;
}
 

public static void addFragment(FragmentActivity fragmentActivity, Fragment fragmentToAdd, String fragmentTag) {

        FragmentManager supportFragmentManager = fragmentActivity.getSupportFragmentManager();

        //Fragment activeFragment = UIService.getActiveFragment(fragmentActivity);
        FragmentTransaction fragmentTransaction = supportFragmentManager
                .beginTransaction();
        /*if (null != activeFragment) {
            fragmentTransaction.hide(activeFragment);
        }*/

        fragmentTransaction.replace(R.id.container, fragmentToAdd,
                fragmentTag);

        if (supportFragmentManager.getBackStackEntryCount() > 1) {
            supportFragmentManager.popBackStack();
        }
        fragmentTransaction.addToBackStack(fragmentTag);
        fragmentTransaction.commit();
        supportFragmentManager.executePendingTransactions();
        //Log.i(TAG, "BackStackEntryCount: " + supportFragmentManager.getBackStackEntryCount());
    }
 

@Override
public void onCodeScanned(String contents) {
    Log.d(TAG, "Code Scanned: " + contents);
    if (isCodeAlreadyScanned) {
        return;
    }       // To avoid double scans and pop 2 times the fragment
    isCodeAlreadyScanned = true;

    // Beep
    final ToneGenerator tg = new ToneGenerator(AudioManager.STREAM_NOTIFICATION, 100);
    tg.startTone(ToneGenerator.TONE_PROP_BEEP);

    //
    mListener.onPasswordUpdated(contents);

    // Pop current fragment
    FragmentActivity activity = getActivity();
    if (activity != null) {
        FragmentManager fragmentManager = activity.getSupportFragmentManager();
        fragmentManager.popBackStack();
    }
}
 

public void backToMain() {
    FragmentManager fm = getBaseActivity().getSupportFragmentManager();
    int c = fm.getBackStackEntryCount();
    for (int i = 0; i < c; i++) {
        fm.popBackStack();
    }
}
 

/**
 * Pushes the @{link JobDetailsFragment} on the stack.
 *
 * @param jobId ID of the job of which the details should be displayed.
 */
@Override
public void showJobDetails(String jobId) {
    FragmentManager fm = getSupportFragmentManager();
    if (fm.getBackStackEntryCount() > 0 && JobDetailsFragment.TAG.equals(fm.getBackStackEntryAt(fm.getBackStackEntryCount() - 1).getName())) {
        fm.popBackStack();
    }
    FragmentTransaction ft = fm.beginTransaction();
    ft.setCustomAnimations(R.anim.right_enter, R.anim.right_exit, R.anim.right_enter, R.anim.right_exit);
    ft.add(R.id.container, JobDetailsFragment.newInstance(jobId), JobDetailsFragment.TAG);
    ft.addToBackStack(JobDetailsFragment.TAG);
    ft.commit();
}
 

@Override
public boolean onSupportNavigateUp() {
  FragmentManager fragmentManager = getSupportFragmentManager();
  if (fragmentManager.getBackStackEntryCount() > 0) {
    fragmentManager.popBackStack();
  } else {
    // TODO [greyson] Navigation
    Intent intent = new Intent(this, MainActivity.class);
    intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
    startActivity(intent);
    finish();
  }
  return true;
}
 

/**
 * 前の Fragment に戻ります.
 * <p>
 * 前の Fragment がない場合には Activity を終了します。
 * </p>
 */
void popFragment() {
    FragmentManager manager = getFragmentManager();
    if (manager.getBackStackEntryCount() > 0) {
        manager.popBackStack();
    } else {
        getActivity().finish();
    }
}
 

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);

    if (requestCode != RC_HANDLE_CAMERA_PERM) {
        Log.d(TAG, "Got unexpected permission result: " + requestCode);
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        return;
    }

    if (grantResults.length != 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
        Log.d(TAG, "Camera permission granted - initialize the camera source");
        // we have permission, so create the camerasource
        createCameraSource(kAutoFocus, kUseFlash);
        return;
    }

    Log.e(TAG, "Permission not granted: results len = " + grantResults.length +
            " Result code = " + (grantResults.length > 0 ? grantResults[0] : "(empty)"));

    DialogInterface.OnClickListener listener = (dialog, id) -> {
        FragmentActivity activity = getActivity();
        if (activity != null) {
            FragmentManager fragmentManager = activity.getSupportFragmentManager();
            fragmentManager.popBackStack();
        }
    };

    AlertDialog.Builder builder = new AlertDialog.Builder(getContext());
    builder.setMessage(R.string.mqttcodereader_nocamerapermission)
            .setPositiveButton(android.R.string.ok, listener)
            .show();
}
 

public static void addFragment(FragmentActivity fragmentActivity, Fragment fragmentToAdd, String fragmentTag) {
    FragmentManager supportFragmentManager = fragmentActivity.getSupportFragmentManager();

    FragmentTransaction fragmentTransaction = supportFragmentManager
            .beginTransaction();
    fragmentTransaction.replace(R.id.layout_child_activity, fragmentToAdd,
            fragmentTag);

    if (supportFragmentManager.getBackStackEntryCount() > 1) {
        supportFragmentManager.popBackStack();
    }
    fragmentTransaction.addToBackStack(fragmentTag);
    fragmentTransaction.commitAllowingStateLoss();
    supportFragmentManager.executePendingTransactions();
}
 

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch(item.getItemId()) {
        case android.R.id.home:
            callFragment();
            FragmentManager manager = getSupportFragmentManager();
            if (manager.getBackStackEntryCount() > 0) {
                manager.popBackStack();
            } else {
                finish();
            }
            return true;
    }
    return super.onOptionsItemSelected(item);
}
 

public boolean back() {
    FragmentManager fm = getBaseActivity().getSupportFragmentManager();
    if (fm.getBackStackEntryCount() > 0) {
        fm.popBackStack();

        return true;
    }
    return false;
}
 

private void popFragmentsIfNoPeripheralsConnected() {
    final int numConnectedPeripherals = BleManager.getInstance().getConnectedDevices().size();
    final boolean isLastConnectedPeripheral = numConnectedPeripherals == 0;

    if (isLastConnectedPeripheral && (!kAvoidPoppingFragmentsWhileOnDfu || !isIsDfuInProgress())) {
        Log.d(TAG, "No peripherals connected. Pop all fragments");
        FragmentManager fragmentManager = getSupportFragmentManager();
        fragmentManager.popBackStack(null, FragmentManager.POP_BACK_STACK_INCLUSIVE);
        fragmentManager.executePendingTransactions();
    }
}
 

public void backToMain() {
    FragmentManager fm = getBaseActivity().getSupportFragmentManager();
    int c = fm.getBackStackEntryCount();
    for (int i = 0; i < c; i++) {
        fm.popBackStack();
    }
}
 

public boolean back() {
    FragmentManager fm = getBaseActivity().getSupportFragmentManager();
    if (fm.getBackStackEntryCount() > 0) {
        fm.popBackStack();

        return true;
    }
    return false;
}
 

private void popOverlay(Fragment frag) {
    if(frag != null) {
        FragmentManager manager = getSupportFragmentManager();
        FragmentTransaction trans = manager.beginTransaction();
        trans.remove(frag);
        trans.commit();
        manager.popBackStack();
    }
}