| /* |
| * Copyright (C) 2013 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.example.android.supportv7.app; |
| |
| import com.example.android.supportv7.R; |
| |
| import android.os.Bundle; |
| import android.support.v4.app.Fragment; |
| import android.support.v4.app.FragmentManager; |
| import android.support.v4.app.FragmentTransaction; |
| import android.support.v4.view.MenuItemCompat; |
| import android.support.v7.app.AppCompatActivity; |
| import android.view.Menu; |
| import android.view.MenuInflater; |
| import android.view.MenuItem; |
| import android.view.View; |
| import android.view.View.OnClickListener; |
| import android.widget.CheckBox; |
| import android.widget.Toast; |
| |
| /** |
| * Demonstrates how fragments can participate in the options menu. |
| */ |
| public class ActionBarFragmentMenu extends AppCompatActivity { |
| MenuFragment mFragment1; |
| Menu2Fragment mFragment2; |
| CheckBox mCheckBox1; |
| CheckBox mCheckBox2; |
| CheckBox mCheckBox3; |
| CheckBox mHasOptionsMenu; |
| CheckBox mMenuVisibility; |
| |
| // Update fragment visibility when check boxes are changed. |
| final OnClickListener mClickListener = new OnClickListener() { |
| @Override |
| public void onClick(View v) { |
| updateFragmentVisibility(); |
| } |
| }; |
| |
| @Override |
| protected void onCreate(Bundle savedInstanceState) { |
| super.onCreate(savedInstanceState); |
| setContentView(R.layout.action_bar_fragment_menu); |
| |
| // Make sure the two menu fragments are created. |
| FragmentManager fm = getSupportFragmentManager(); |
| FragmentTransaction ft = fm.beginTransaction(); |
| mFragment1 = (MenuFragment)fm.findFragmentByTag("f1"); |
| if (mFragment1 == null) { |
| mFragment1 = new MenuFragment(); |
| ft.add(mFragment1, "f1"); |
| } |
| mFragment2 = (Menu2Fragment)fm.findFragmentByTag("f2"); |
| if (mFragment2 == null) { |
| mFragment2 = new Menu2Fragment(); |
| ft.add(mFragment2, "f2"); |
| } |
| ft.commit(); |
| |
| // Watch check box clicks. |
| mCheckBox1 = (CheckBox)findViewById(R.id.menu1); |
| mCheckBox1.setOnClickListener(mClickListener); |
| mCheckBox2 = (CheckBox)findViewById(R.id.menu2); |
| mCheckBox2.setOnClickListener(mClickListener); |
| mCheckBox3 = (CheckBox)findViewById(R.id.menu3); |
| mCheckBox3.setOnClickListener(mClickListener); |
| mHasOptionsMenu = (CheckBox)findViewById(R.id.has_options_menu); |
| mHasOptionsMenu.setOnClickListener(mClickListener); |
| mMenuVisibility = (CheckBox)findViewById(R.id.menu_visibility); |
| mMenuVisibility.setOnClickListener(mClickListener); |
| |
| // Make sure fragments start out with correct visibility. |
| updateFragmentVisibility(); |
| } |
| |
| @Override |
| protected void onRestoreInstanceState(Bundle savedInstanceState) { |
| super.onRestoreInstanceState(savedInstanceState); |
| // Make sure fragments are updated after check box view state is restored. |
| updateFragmentVisibility(); |
| } |
| |
| // Update fragment visibility based on current check box state. |
| void updateFragmentVisibility() { |
| // Update top level fragments. |
| FragmentTransaction ft = getSupportFragmentManager().beginTransaction(); |
| if (mCheckBox1.isChecked()) ft.show(mFragment1); |
| else ft.hide(mFragment1); |
| if (mCheckBox2.isChecked()) ft.show(mFragment2); |
| else ft.hide(mFragment2); |
| ft.commit(); |
| |
| mFragment1.setHasOptionsMenu(mHasOptionsMenu.isChecked()); |
| mFragment1.setMenuVisibility(mMenuVisibility.isChecked()); |
| mFragment2.setHasOptionsMenu(mHasOptionsMenu.isChecked()); |
| mFragment2.setMenuVisibility(mMenuVisibility.isChecked()); |
| |
| // Update the nested fragment. |
| if (mFragment2.mFragment3 != null) { |
| ft = mFragment2.getFragmentManager().beginTransaction(); |
| if (mCheckBox3.isChecked()) ft.show(mFragment2.mFragment3); |
| else ft.hide(mFragment2.mFragment3); |
| ft.commit(); |
| |
| mFragment2.mFragment3.setHasOptionsMenu(mHasOptionsMenu.isChecked()); |
| mFragment2.mFragment3.setMenuVisibility(mMenuVisibility.isChecked()); |
| } |
| } |
| |
| /** |
| * A fragment that displays a menu. This fragment happens to not |
| * have a UI (it does not implement onCreateView), but it could also |
| * have one if it wanted. |
| */ |
| public static class MenuFragment extends Fragment { |
| @Override |
| public void onCreate(Bundle savedInstanceState) { |
| super.onCreate(savedInstanceState); |
| setHasOptionsMenu(true); |
| } |
| |
| @Override |
| public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { |
| MenuItemCompat.setShowAsAction(menu.add("Menu 1a"), MenuItem.SHOW_AS_ACTION_IF_ROOM); |
| MenuItemCompat.setShowAsAction(menu.add("Menu 1b"), MenuItem.SHOW_AS_ACTION_IF_ROOM); |
| super.onCreateOptionsMenu(menu, inflater); |
| } |
| |
| @Override |
| public boolean onOptionsItemSelected(MenuItem item) { |
| if (item.getTitle().equals("Menu 1a")) { |
| Toast.makeText(getActivity(), "Selected Menu 1a.", Toast.LENGTH_SHORT).show(); |
| return true; |
| } |
| if (item.getTitle().equals("Menu 1b")) { |
| Toast.makeText(getActivity(), "Selected Menu 1b.", Toast.LENGTH_SHORT).show(); |
| return true; |
| } |
| return super.onOptionsItemSelected(item); |
| } |
| } |
| |
| /** |
| * Second fragment with a menu. |
| */ |
| public static class Menu2Fragment extends Fragment { |
| Menu3Fragment mFragment3; |
| |
| @Override |
| public void onCreate(Bundle savedInstanceState) { |
| super.onCreate(savedInstanceState); |
| setHasOptionsMenu(true); |
| |
| FragmentManager fm = getChildFragmentManager(); |
| FragmentTransaction ft = fm.beginTransaction(); |
| mFragment3 = (Menu3Fragment)fm.findFragmentByTag("f3"); |
| if (mFragment3 == null) { |
| mFragment3 = new Menu3Fragment(); |
| ft.add(mFragment3, "f3"); |
| } |
| ft.commit(); |
| } |
| |
| @Override |
| public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { |
| MenuItemCompat.setShowAsAction(menu.add("Menu 2"), MenuItem.SHOW_AS_ACTION_IF_ROOM); |
| } |
| |
| @Override |
| public boolean onOptionsItemSelected(MenuItem item) { |
| if (item.getTitle().equals("Menu 2")) { |
| Toast.makeText(getActivity(), "Selected Menu 2.", Toast.LENGTH_SHORT).show(); |
| return true; |
| } |
| return false; |
| } |
| } |
| |
| /** |
| * Third fragment with a menu. |
| * This one is nested within the second. |
| */ |
| public static class Menu3Fragment extends Fragment { |
| @Override |
| public void onCreate(Bundle savedInstanceState) { |
| super.onCreate(savedInstanceState); |
| setHasOptionsMenu(true); |
| } |
| |
| @Override |
| public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { |
| Toast.makeText(getActivity(), "Created nested fragment's menu.", |
| Toast.LENGTH_SHORT).show(); |
| inflater.inflate(R.menu.display_options_actions, menu); |
| super.onCreateOptionsMenu(menu, inflater); |
| } |
| |
| @Override |
| public void onDestroyOptionsMenu() { |
| Toast.makeText(getActivity(), "Destroyed nested fragment's menu.", |
| Toast.LENGTH_SHORT).show(); |
| super.onDestroyOptionsMenu(); |
| } |
| |
| @Override |
| public void onPrepareOptionsMenu(Menu menu) { |
| Toast.makeText(getActivity(), "Prepared nested fragment's menu.", |
| Toast.LENGTH_SHORT).show(); |
| super.onPrepareOptionsMenu(menu); |
| } |
| |
| @Override |
| public boolean onOptionsItemSelected(MenuItem item) { |
| if (item.getItemId() == R.id.simple_item) { |
| Toast.makeText(getActivity(), "Selected nested fragment's menu item.", |
| Toast.LENGTH_SHORT).show(); |
| return true; |
| } |
| return super.onOptionsItemSelected(item); |
| } |
| } |
| } |