本文整理了Java中androidx.fragment.app.FragmentManager.findFragmentByTag()方法的一些代码示例，展示了FragmentManager.findFragmentByTag()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.findFragmentByTag()方法的具体详情如下：
包路径：androidx.fragment.app.FragmentManager
类名称：FragmentManager
方法名：findFragmentByTag

FragmentManager.findFragmentByTag介绍

暂无

代码示例

代码示例来源：origin: googlesamples/easypermissions

@Override
  public void showRequestPermissionRationale(@NonNull String rationale,
                        @NonNull String positiveButton,
                        @NonNull String negativeButton,
                        @StyleRes int theme,
                        int requestCode,
                        @NonNull String... perms) {

    FragmentManager fm = getSupportFragmentManager();

    // Check if fragment is already showing
    Fragment fragment = fm.findFragmentByTag(RationaleDialogFragmentCompat.TAG);
    if (fragment instanceof RationaleDialogFragmentCompat) {
      Log.d(TAG, "Found existing fragment, not showing rationale.");
      return;
    }

    RationaleDialogFragmentCompat
        .newInstance(rationale, positiveButton, negativeButton, theme, requestCode, perms)
        .showAllowingStateLoss(fm, RationaleDialogFragmentCompat.TAG);
  }
}

代码示例来源：origin: wdullaer/MaterialDateTimePicker

@Override
public void onResume() {
  super.onResume();
  DatePickerDialog dpd = (DatePickerDialog) requireFragmentManager().findFragmentByTag("Datepickerdialog");
  if(dpd != null) dpd.setOnDateSetListener(this);
}

代码示例来源：origin: wdullaer/MaterialDateTimePicker

@Override
public void onResume() {
  super.onResume();
  TimePickerDialog tpd = (TimePickerDialog) requireFragmentManager().findFragmentByTag("Timepickerdialog");
  if(tpd != null) tpd.setOnTimeSetListener(this);
}

代码示例来源：origin: googlesamples/easypermissions

@Test
public void shouldShowCorrectDialog_whenMissingPermissionsAndShowRationaleFromAppCompatActivity() {
  grantPermissions(ONE_PERM);
  showRationale(true, ALL_PERMS);
  EasyPermissions.requestPermissions(spyAppCompatActivity, RATIONALE, TestAppCompatActivity.REQUEST_CODE, ALL_PERMS);
  androidx.fragment.app.Fragment dialogFragment = spyAppCompatActivity.getSupportFragmentManager()
      .findFragmentByTag(RationaleDialogFragmentCompat.TAG);
  assertThat(dialogFragment).isInstanceOf(RationaleDialogFragmentCompat.class);
  Dialog dialog = ((RationaleDialogFragmentCompat) dialogFragment).getDialog();
  assertThatHasExpectedRationale(dialog, RATIONALE);
}

代码示例来源：origin: googlesamples/easypermissions

@Test
public void shouldShowCorrectDialog_whenMissingPermissionsAndShowRationaleFromFragment() {
  grantPermissions(ONE_PERM);
  showRationale(true, ALL_PERMS);
  EasyPermissions.requestPermissions(spyFragment, RATIONALE, TestFragment.REQUEST_CODE, ALL_PERMS);
  androidx.fragment.app.Fragment dialogFragment = spyFragment.getChildFragmentManager()
      .findFragmentByTag(RationaleDialogFragmentCompat.TAG);
  assertThat(dialogFragment).isInstanceOf(RationaleDialogFragmentCompat.class);
  Dialog dialog = ((RationaleDialogFragmentCompat) dialogFragment).getDialog();
  assertThatHasExpectedRationale(dialog, RATIONALE);
}

代码示例来源：origin: ankidroid/Anki-Android

/**
 * Global method to show dialog fragment including adding it to back stack Note: DO NOT call this from an async
 * task! If you need to show a dialog from an async task, use showAsyncDialogFragment()
 *
 * @param newFragment  the DialogFragment you want to show
 */
public void showDialogFragment(DialogFragment newFragment) {
  // DialogFragment.show() will take care of adding the fragment
  // in a transaction. We also want to remove any currently showing
  // dialog, so make our own transaction and take care of that here.
  FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
  Fragment prev = getSupportFragmentManager().findFragmentByTag("dialog");
  if (prev != null) {
    ft.remove(prev);
  }
  // save transaction to the back stack
  ft.addToBackStack("dialog");
  newFragment.show(ft, "dialog");
  getSupportFragmentManager().executePendingTransactions();
}

代码示例来源：origin: googlesamples/easypermissions

@Test
public void shouldShowCorrectDialogUsingRequest_whenMissingPermissionsAndShowRationaleFromFragment() {
  grantPermissions(ONE_PERM);
  showRationale(true, ALL_PERMS);
  PermissionRequest request = new PermissionRequest.Builder(spyFragment, TestFragment.REQUEST_CODE, ALL_PERMS)
      .setPositiveButtonText(POSITIVE)
      .setNegativeButtonText(NEGATIVE)
      .setRationale(RATIONALE)
      .setTheme(R.style.Theme_AppCompat)
      .build();
  EasyPermissions.requestPermissions(request);
  androidx.fragment.app.Fragment dialogFragment = spyFragment.getChildFragmentManager()
      .findFragmentByTag(RationaleDialogFragmentCompat.TAG);
  assertThat(dialogFragment).isInstanceOf(RationaleDialogFragmentCompat.class);
  Dialog dialog = ((RationaleDialogFragmentCompat) dialogFragment).getDialog();
  assertThatHasExpectedButtonsAndRationale(dialog, RATIONALE, POSITIVE, NEGATIVE);
}

代码示例来源：origin: googlesamples/easypermissions

@Test
public void shouldShowCorrectDialogUsingRequest_whenMissingPermissionsAndShowRationaleFromAppCompatActivity() {
  grantPermissions(ONE_PERM);
  showRationale(true, ALL_PERMS);
  PermissionRequest request = new PermissionRequest.Builder(spyAppCompatActivity, TestAppCompatActivity.REQUEST_CODE, ALL_PERMS)
      .setPositiveButtonText(android.R.string.ok)
      .setNegativeButtonText(android.R.string.cancel)
      .setRationale(android.R.string.unknownName)
      .setTheme(R.style.Theme_AppCompat)
      .build();
  EasyPermissions.requestPermissions(request);
  androidx.fragment.app.Fragment dialogFragment = spyAppCompatActivity.getSupportFragmentManager()
      .findFragmentByTag(RationaleDialogFragmentCompat.TAG);
  assertThat(dialogFragment).isInstanceOf(RationaleDialogFragmentCompat.class);
  Dialog dialog = ((RationaleDialogFragmentCompat) dialogFragment).getDialog();
  assertThatHasExpectedButtonsAndRationale(dialog, android.R.string.unknownName,
      android.R.string.ok, android.R.string.cancel);
}

代码示例来源：origin: westnordost/StreetComplete

private AbstractBottomSheetFragment getBottomSheetFragment()
{
  return (AbstractBottomSheetFragment) getSupportFragmentManager().findFragmentByTag(BOTTOM_SHEET);
}

代码示例来源：origin: westnordost/StreetComplete

@Override public void onNewIntent(Intent intent)
  {
    OsmOAuthDialogFragment oauthFragment = (OsmOAuthDialogFragment) getFragmentManager()
        .findFragmentByTag(OsmOAuthDialogFragment.TAG);
    if(oauthFragment != null)
    {
      oauthFragment.onNewIntent(intent);
    }
  }
}

代码示例来源：origin: westnordost/StreetComplete

getActivity().getSupportFragmentManager().findFragmentByTag(tag);
if(locationRequestFragment != null)

代码示例来源：origin: proninyaroslav/libretorrent

@Override
public void onNegativeClicked(@Nullable View v)
{
  FragmentManager fm = getFragmentManager();
  if (fm == null)
    return;
  if (fm.findFragmentByTag(TAG_MAGNET_INCLUDE_PRIOR_DIALOG) != null)
    shareMagnetRequest(false);
}

代码示例来源：origin: proninyaroslav/libretorrent

@Override
public void onPositiveClicked(@Nullable View v)
{
  FragmentManager fm = getFragmentManager();
  if (fm != null && fm.findFragmentByTag(TAG_DELETE_TRACKERS_DIALOG) != null)
    deleteTrackers();
}

代码示例来源：origin: morogoku/MTweaks-KernelAdiutorMOD

private Fragment getFragment() {
  Fragment fragment = getSupportFragmentManager()
      .findFragmentByTag(BannerResizerFragment.class.getSimpleName());
  if (fragment == null) {
    fragment = new BannerResizerFragment();
  }
  return fragment;
}

代码示例来源：origin: proninyaroslav/libretorrent

@Override
protected void onRestoreInstanceState(Bundle savedInstanceState)
{
  super.onRestoreInstanceState(savedInstanceState);
  progress = (SpinnerProgressDialog)getSupportFragmentManager().findFragmentByTag(TAG_SPINNER_PROGRESS);
}

代码示例来源：origin: jruesga/rview

@Override
public boolean dispatchKeyEvent(KeyEvent event) {
  if (event.getAction() == KeyEvent.ACTION_DOWN) {
    Fragment fragment = getSupportFragmentManager().findFragmentByTag(FRAGMENT_TAG);
    if (fragment instanceof KeyEventBindable) {
      if (((KeyEventBindable) fragment).onKeyDown(event.getKeyCode(), event)) {
        return true;
      }
    }
  }
  return super.dispatchKeyEvent(event);
}

代码示例来源：origin: proninyaroslav/libretorrent

public static HeavyInstanceStorage getInstance(FragmentManager fragmentManager)
  {
    if (fragmentManager == null)
      return null;

    HeavyInstanceStorage out = (HeavyInstanceStorage)fragmentManager.findFragmentByTag(TAG);

    if (out == null) {
      out = new HeavyInstanceStorage();
      fragmentManager.beginTransaction().add(out, TAG).commitAllowingStateLoss();
    }

    return out;
  }
}

代码示例来源：origin: proninyaroslav/libretorrent

@Override
public void onDestroyView()
{
  super.onDestroyView();
  FragmentManager fm = getFragmentManager();
  if (fm == null)
    return;
  Fragment fragment = fm.findFragmentByTag(TAG_FETCH_ERROR_DIALOG);
  /* Prevents leak the dialog in portrait mode */
  if (Utils.isLargeScreenDevice(activity) && fragment != null)
    ((BaseAlertDialog)fragment).dismiss();
}

代码示例来源：origin: michael-rapp/AndroidMaterialPreferences

@Override
protected final void onCreate(final Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  Fragment fragment = getSupportFragmentManager().findFragmentByTag(FRAGMENT_TAG);
  if (fragment == null) {
    fragment = Fragment.instantiate(this, PreferenceFragment.class.getName());
  }
  FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
  transaction.replace(R.id.fragment, fragment);
  transaction.commit();
}

代码示例来源：origin: jaredrummler/ColorPicker

@Override protected void onAttachedToActivity() {
 super.onAttachedToActivity();
 if (showDialog) {
  FragmentActivity activity = (FragmentActivity) getContext();
  ColorPickerDialog fragment =
    (ColorPickerDialog) activity.getSupportFragmentManager().findFragmentByTag(getFragmentTag());
  if (fragment != null) {
   // re-bind preference to fragment
   fragment.setColorPickerDialogListener(this);
  }
 }
}