1/* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package com.example.android.supportv7.app; 18 19import com.example.android.supportv7.R; 20 21import android.os.Bundle; 22import android.support.annotation.Nullable; 23import android.support.v4.app.Fragment; 24import android.support.v4.app.FragmentManager; 25import android.support.v4.app.FragmentPagerAdapter; 26import android.support.v4.view.MenuItemCompat; 27import android.support.v4.view.ViewPager; 28import android.support.v7.app.AppCompatActivity; 29import android.support.v7.widget.Toolbar; 30import android.view.Gravity; 31import android.view.LayoutInflater; 32import android.view.Menu; 33import android.view.MenuInflater; 34import android.view.MenuItem; 35import android.view.View; 36import android.view.ViewGroup; 37import android.widget.TextView; 38import android.widget.Toast; 39 40import java.util.ArrayList; 41import java.util.List; 42 43/** 44 * Demonstrates how fragments can participate in the options menu from within a {@link ViewPager}. 45 */ 46public class ToolbarFragmentPagerMenu extends AppCompatActivity { 47 48 @Override 49 protected void onCreate(Bundle savedInstanceState) { 50 super.onCreate(savedInstanceState); 51 setContentView(R.layout.toolbar_fragment_pager); 52 53 Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); 54 setSupportActionBar(toolbar); 55 56 ViewPager vp = (ViewPager) findViewById(R.id.viewpager); 57 PagerAdapter adapter = new PagerAdapter(getSupportFragmentManager(), 58 new MenuFragment(), new Menu2Fragment()); 59 vp.setAdapter(adapter); 60 } 61 62 private static class PagerAdapter extends FragmentPagerAdapter { 63 private final List<Fragment> mFragments; 64 65 public PagerAdapter(FragmentManager fm, Fragment... fragments) { 66 super(fm); 67 68 mFragments = new ArrayList<Fragment>(); 69 for (Fragment fragment : fragments) { 70 mFragments.add(fragment); 71 } 72 } 73 74 @Override 75 public Fragment getItem(int position) { 76 return mFragments.get(position); 77 } 78 79 @Override 80 public int getCount() { 81 return mFragments.size(); 82 } 83 } 84 85 /** 86 * A fragment that displays a menu. This fragment happens to not 87 * have a UI (it does not implement onCreateView), but it could also 88 * have one if it wanted. 89 */ 90 public static class MenuFragment extends Fragment { 91 @Override 92 public void onCreate(Bundle savedInstanceState) { 93 super.onCreate(savedInstanceState); 94 setHasOptionsMenu(true); 95 } 96 97 @Override 98 public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { 99 MenuItemCompat.setShowAsAction(menu.add("Menu 1a"), MenuItemCompat.SHOW_AS_ACTION_IF_ROOM); 100 MenuItemCompat.setShowAsAction(menu.add("Menu 1b"), MenuItemCompat.SHOW_AS_ACTION_NEVER); 101 super.onCreateOptionsMenu(menu, inflater); 102 } 103 104 @Override 105 public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, 106 @Nullable Bundle savedInstanceState) { 107 TextView textView = new TextView(container.getContext()); 108 109 textView.setText(getClass().getSimpleName()); 110 textView.setGravity(Gravity.CENTER); 111 textView.setLayoutParams(new ViewGroup.LayoutParams( 112 ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT)); 113 114 return textView; 115 } 116 117 @Override 118 public boolean onOptionsItemSelected(MenuItem item) { 119 if (item.getTitle().equals("Menu 1a")) { 120 Toast.makeText(getActivity(), "Selected Menu 1a.", Toast.LENGTH_SHORT).show(); 121 return true; 122 } 123 if (item.getTitle().equals("Menu 1b")) { 124 Toast.makeText(getActivity(), "Selected Menu 1b.", Toast.LENGTH_SHORT).show(); 125 return true; 126 } 127 return super.onOptionsItemSelected(item); 128 } 129 } 130 131 /** 132 * Second fragment with a menu. 133 */ 134 public static class Menu2Fragment extends Fragment { 135 @Override 136 public void onCreate(Bundle savedInstanceState) { 137 super.onCreate(savedInstanceState); 138 setHasOptionsMenu(true); 139 } 140 141 @Override 142 public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { 143 MenuItemCompat.setShowAsAction(menu.add("Menu 2"), MenuItemCompat.SHOW_AS_ACTION_IF_ROOM); 144 } 145 146 @Override 147 public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, 148 @Nullable Bundle savedInstanceState) { 149 TextView textView = new TextView(container.getContext()); 150 151 textView.setText(getClass().getSimpleName()); 152 textView.setGravity(Gravity.CENTER); 153 textView.setLayoutParams(new ViewGroup.LayoutParams( 154 ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT)); 155 156 return textView; 157 } 158 159 @Override 160 public boolean onOptionsItemSelected(MenuItem item) { 161 if (item.getTitle().equals("Menu 2")) { 162 Toast.makeText(getActivity(), "Selected Menu 2.", Toast.LENGTH_SHORT).show(); 163 return true; 164 } 165 return false; 166 } 167 } 168} 169