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 17 package com.example.android.supportv7.app; 18 19 import android.os.Bundle; 20 import android.support.annotation.Nullable; 21 import android.support.v4.app.Fragment; 22 import android.support.v4.app.FragmentManager; 23 import android.support.v4.app.FragmentPagerAdapter; 24 import android.support.v4.view.ViewPager; 25 import android.support.v7.app.AppCompatActivity; 26 import android.support.v7.widget.Toolbar; 27 import android.view.Gravity; 28 import android.view.LayoutInflater; 29 import android.view.Menu; 30 import android.view.MenuInflater; 31 import android.view.MenuItem; 32 import android.view.View; 33 import android.view.ViewGroup; 34 import android.widget.TextView; 35 import android.widget.Toast; 36 37 import com.example.android.supportv7.R; 38 39 import java.util.ArrayList; 40 import java.util.List; 41 42 /** 43 * Demonstrates how fragments can participate in the options menu from within a {@link ViewPager}. 44 */ 45 public class ToolbarFragmentPagerMenu extends AppCompatActivity { 46 47 @Override 48 protected void onCreate(Bundle savedInstanceState) { 49 super.onCreate(savedInstanceState); 50 setContentView(R.layout.toolbar_fragment_pager); 51 52 Toolbar toolbar = findViewById(R.id.toolbar); 53 setSupportActionBar(toolbar); 54 55 ViewPager vp = findViewById(R.id.viewpager); 56 PagerAdapter adapter = new PagerAdapter(getSupportFragmentManager(), 57 new MenuFragment(), new Menu2Fragment()); 58 vp.setAdapter(adapter); 59 } 60 61 private static class PagerAdapter extends FragmentPagerAdapter { 62 private final List<Fragment> mFragments; 63 64 public PagerAdapter(FragmentManager fm, Fragment... fragments) { 65 super(fm); 66 67 mFragments = new ArrayList<Fragment>(); 68 for (Fragment fragment : fragments) { 69 mFragments.add(fragment); 70 } 71 } 72 73 @Override 74 public Fragment getItem(int position) { 75 return mFragments.get(position); 76 } 77 78 @Override 79 public int getCount() { 80 return mFragments.size(); 81 } 82 } 83 84 /** 85 * A fragment that displays a menu. This fragment happens to not 86 * have a UI (it does not implement onCreateView), but it could also 87 * have one if it wanted. 88 */ 89 public static class MenuFragment extends Fragment { 90 @Override 91 public void onCreate(Bundle savedInstanceState) { 92 super.onCreate(savedInstanceState); 93 setHasOptionsMenu(true); 94 } 95 96 @Override 97 public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { 98 menu.add("Menu 1a").setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 99 menu.add("Menu 1b").setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER); 100 super.onCreateOptionsMenu(menu, inflater); 101 } 102 103 @Override 104 public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, 105 @Nullable Bundle savedInstanceState) { 106 TextView textView = new TextView(container.getContext()); 107 108 textView.setText(getClass().getSimpleName()); 109 textView.setGravity(Gravity.CENTER); 110 textView.setLayoutParams(new ViewGroup.LayoutParams( 111 ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT)); 112 113 return textView; 114 } 115 116 @Override 117 public boolean onOptionsItemSelected(MenuItem item) { 118 if (item.getTitle().equals("Menu 1a")) { 119 Toast.makeText(getActivity(), "Selected Menu 1a.", Toast.LENGTH_SHORT).show(); 120 return true; 121 } 122 if (item.getTitle().equals("Menu 1b")) { 123 Toast.makeText(getActivity(), "Selected Menu 1b.", Toast.LENGTH_SHORT).show(); 124 return true; 125 } 126 return super.onOptionsItemSelected(item); 127 } 128 } 129 130 /** 131 * Second fragment with a menu. 132 */ 133 public static class Menu2Fragment extends Fragment { 134 @Override 135 public void onCreate(Bundle savedInstanceState) { 136 super.onCreate(savedInstanceState); 137 setHasOptionsMenu(true); 138 } 139 140 @Override 141 public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { 142 menu.add("Menu 2").setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 143 } 144 145 @Override 146 public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, 147 @Nullable Bundle savedInstanceState) { 148 TextView textView = new TextView(container.getContext()); 149 150 textView.setText(getClass().getSimpleName()); 151 textView.setGravity(Gravity.CENTER); 152 textView.setLayoutParams(new ViewGroup.LayoutParams( 153 ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT)); 154 155 return textView; 156 } 157 158 @Override 159 public boolean onOptionsItemSelected(MenuItem item) { 160 if (item.getTitle().equals("Menu 2")) { 161 Toast.makeText(getActivity(), "Selected Menu 2.", Toast.LENGTH_SHORT).show(); 162 return true; 163 } 164 return false; 165 } 166 } 167 } 168
