本文整理了Java中androidx.fragment.app.FragmentManager.getBackStackEntryCount()方法的一些代码示例，展示了FragmentManager.getBackStackEntryCount()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。FragmentManager.getBackStackEntryCount()方法的具体详情如下：
包路径：androidx.fragment.app.FragmentManager
类名称：FragmentManager
方法名：getBackStackEntryCount

FragmentManager.getBackStackEntryCount介绍

暂无

代码示例

代码示例来源：origin: westnordost/StreetComplete

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

代码示例来源：origin: WireGuard/wireguard-android

@Override public void onBackStackChanged() {
  if (actionBar == null)
    return;
  // Do not show the home menu when the two-pane layout is at the detail view (see above).
  final int backStackEntries = getSupportFragmentManager().getBackStackEntryCount();
  final int minBackStackEntries = isTwoPaneLayout ? 2 : 1;
  actionBar.setDisplayHomeAsUpEnabled(backStackEntries >= minBackStackEntries);
}

代码示例来源：origin: KDE/kdeconnect-android

@Override
public boolean onOptionsItemSelected(MenuItem item) {
  if (item.getItemId() == android.R.id.home) {
    FragmentManager fm = getSupportFragmentManager();
    if (fm.getBackStackEntryCount() > 0) {
      fm.popBackStack();
      return true;
    }
  }
  return super.onOptionsItemSelected(item);
}

代码示例来源：origin: saki4510t/libcommon

@Override
public void onBackPressed() {
  if (DEBUG) Log.v(TAG, "onBackPressed:");
  // Fragment内の子Fragmentを切り替えた時にbackキーを押すと
  // Fragment自体がpopBackされてしまうのに対するworkaround
  final FragmentManager fm = getSupportFragmentManager();
  final Fragment fragment = fm.findFragmentById(R.id.container);
  if (fragment instanceof BaseFragment) {
    final FragmentManager child_fm = fragment.getChildFragmentManager();
    if (child_fm.getBackStackEntryCount() > 0) {
      // HomeFragmentの子Fragmentがバックスタックに有る時はそれをpopBackする
      child_fm.popBackStack();
      return;
    }
    if (((BaseFragment) fragment).onBackPressed()) {
      return;
    }
  }
  super.onBackPressed();
}

代码示例来源：origin: andstatus/andstatus

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

代码示例来源：origin: WireGuard/wireguard-android

@Override
public void onBackPressed() {
  final int backStackEntries = getSupportFragmentManager().getBackStackEntryCount();
  // If the action menu is visible and expanded, collapse it instead of navigating back.
  if (isTwoPaneLayout || backStackEntries == 0) {
    if (listFragment != null && listFragment.collapseActionMenu())
      return;
  }
  // If the two-pane layout does not have an editor open, going back should exit the app.
  if (isTwoPaneLayout && backStackEntries <= 1) {
    finish();
    return;
  }
  // Deselect the current tunnel on navigating back from the detail pane to the one-pane list.
  if (!isTwoPaneLayout && backStackEntries == 1) {
    setSelectedTunnel(null);
    return;
  }
  super.onBackPressed();
}

代码示例来源：origin: WireGuard/wireguard-android

@Override
  protected void onSelectedTunnelChanged(@Nullable final Tunnel oldTunnel,
                      @Nullable final Tunnel newTunnel) {
    final FragmentManager fragmentManager = getSupportFragmentManager();
    final int backStackEntries = fragmentManager.getBackStackEntryCount();
    if (newTunnel == null) {
      // Clear everything off the back stack (all editors and detail fragments).
      fragmentManager.popBackStackImmediate(0, FragmentManager.POP_BACK_STACK_INCLUSIVE);
      return;
    }
    if (backStackEntries == 2) {
      // Pop the editor off the back stack to reveal the detail fragment. Use the immediate
      // method to avoid the editor picking up the new tunnel while it is still visible.
      fragmentManager.popBackStackImmediate();
    } else if (backStackEntries == 0) {
      // Create and show a new detail fragment.
      fragmentManager.beginTransaction()
          .add(R.id.detail_container, new TunnelDetailFragment())
          .setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE)
          .addToBackStack(null)
          .commit();
    }
  }
}

代码示例来源：origin: pranavpandey/dynamic-support

@Override
  public void onBackStackChanged() {
    final int fragmentsCount =
        getSupportFragmentManager().getBackStackEntryCount();
    if (fragmentsCount > 0) {
      mContentFragmentTag = getSupportFragmentManager()
          .getBackStackEntryAt(fragmentsCount - 1).getName();
      if (mContentFragmentTag != null) {
        mContentFragment = getSupportFragmentManager()
            .findFragmentByTag(mContentFragmentTag);
      }
    } else {
      mContentFragment = getSupportFragmentManager()
          .findFragmentById(R.id.ads_container);
    }
  }
});

代码示例来源：origin: gateship-one/odyssey

if (fragmentManager.getBackStackEntryCount() == 0) {
} else if (fragmentManager.getBackStackEntryCount() > 0) {
  onBackPressed();
} else {

代码示例来源：origin: gateship-one/odyssey

if (fragmentManager.getBackStackEntryCount() == 0) {
if (fragmentManager.getBackStackEntryCount() == 0) {
  mDrawerToggle.setDrawerIndicatorEnabled(true);