androidx.appcompat.app.ActionBar#setHomeActionContentDescription ( )源码实例Demo

@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
  inflater.inflate(R.menu.menu_update_experiment, menu);

  ActionBar actionBar = ((AppCompatActivity) getActivity()).getSupportActionBar();
  actionBar.setHomeAsUpIndicator(R.drawable.ic_close_white_24dp);
  actionBar.setHomeActionContentDescription(android.R.string.cancel);

  super.onCreateOptionsMenu(menu, inflater);
}
 

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

  setContentView(R.layout.activity_claim_experiments);
  boolean isTablet = getResources().getBoolean(R.bool.is_tablet);
  if (!isTablet) {
    setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
  }

  AppAccount claimingAccount =
      WhistlePunkApplication.getAccount(this, getIntent(), ARG_ACCOUNT_KEY);

  ActionBar actionBar = getSupportActionBar();
  actionBar.setHomeAsUpIndicator(
      ColorUtils.colorDrawable(
          this,
          ContextCompat.getDrawable(this, R.drawable.ic_close_white_24dp),
          R.color.claim_experiments_action_bar_text));
  actionBar.setHomeActionContentDescription(android.R.string.cancel);
  actionBar.setTitle(getString(R.string.title_activity_claim_experiments));
  actionBar.setSubtitle(claimingAccount.getAccountName());

  if (getSupportFragmentManager().findFragmentByTag(FRAGMENT_TAG) == null) {
    Fragment fragment =
        ExperimentListFragment.newInstanceForClaimExperimentsMode(
            this, claimingAccount, getIntent().getBooleanExtra(ARG_USE_PANES, true));
    getSupportFragmentManager()
        .beginTransaction()
        .add(R.id.container, fragment, FRAGMENT_TAG)
        .commit();
  }
}
 

@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
  inflater.inflate(R.menu.menu_update_run, menu);

  ActionBar actionBar = ((AppCompatActivity) getActivity()).getSupportActionBar();
  actionBar.setHomeAsUpIndicator(R.drawable.ic_close_white_24dp);
  actionBar.setHomeActionContentDescription(android.R.string.cancel);

  super.onCreateOptionsMenu(menu, inflater);
}
 

@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
  ActionBar actionBar = ((AppCompatActivity) getActivity()).getSupportActionBar();

  actionBar.setDisplayHomeAsUpEnabled(true);
  actionBar.setHomeAsUpIndicator(R.drawable.ic_arrow_back_white_24dp);
  actionBar.setHomeActionContentDescription(R.string.action_save);

  super.onCreateOptionsMenu(menu, inflater);
}
 

@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
  inflater.inflate(R.menu.menu_edit_trigger, menu);

  ActionBar actionBar = ((AppCompatActivity) getActivity()).getSupportActionBar();
  actionBar.setDisplayHomeAsUpEnabled(true);
  if (isNewTrigger()) {
    actionBar.setHomeAsUpIndicator(R.drawable.ic_close_white_24dp);
    actionBar.setHomeActionContentDescription(android.R.string.cancel);
  }

  menu.findItem(R.id.action_save).setVisible(isNewTrigger());
  menu.findItem(R.id.action_save).setEnabled(!isSavingNewTrigger);

  SensorAppearance appearance =
      AppSingleton.getInstance(getActivity())
          .getSensorAppearanceProvider(appAccount)
          .getAppearance(sensorId);
  String triggerTitle =
      getString(
          isNewTrigger()
              ? R.string.title_fragment_add_trigger
              : R.string.title_fragment_edit_trigger);
  actionBar.setTitle(String.format(triggerTitle, appearance.getName(getActivity())));

  super.onCreateOptionsMenu(menu, inflater);
}
 

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

  savedItemId =
      (savedInstanceState == null)
          ? NO_SELECTED_ITEM
          : savedInstanceState.getInt(ARG_SELECTED_NAV_ITEM_ID, NO_SELECTED_ITEM);

  WhistlePunkApplication.getPerfTrackerProvider(this).onActivityInit();

  accountsProvider = WhistlePunkApplication.getAppServices(this).getAccountsProvider();

  setContentView(R.layout.activity_main);
  accountsProvider.installAccountSwitcher(this);

  Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
  setSupportActionBar(toolbar);

  boolean isTablet = getResources().getBoolean(R.bool.is_tablet);
  if (!isTablet) {
    setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
  }

  final ActionBar actionBar = getSupportActionBar();
  if (actionBar != null) {
    actionBar.setDisplayHomeAsUpEnabled(true);
    actionBar.setHomeAsUpIndicator(R.drawable.ic_menu_white_24dp);
    actionBar.setHomeActionContentDescription(R.string.navigation_drawer_content_description);
    actionBar.setDisplayShowTitleEnabled(true);
  }

  drawerLayout = (MultiTouchDrawerLayout) findViewById(R.id.drawer_layout);
  drawerLayout.setStatusBarBackgroundColor(getResources().getColor(R.color.color_primary_dark));
  navigationView = (NavigationView) findViewById(R.id.navigation);
  navigationView.setNavigationItemSelectedListener(this);

  // Only show dev testing options when requested.
  if (!Flags.showTestingOptions()) {
    navigationView.getMenu().removeItem(R.id.dev_testing_options);
  }

  feedbackProvider = WhistlePunkApplication.getAppServices(this).getFeedbackProvider();

  setVolumeControlStream(AudioManager.STREAM_MUSIC);
}