1 /* 2 * Copyright (C) 2007 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.apis.app; 18 19 import com.example.android.apis.R; 20 21 import android.app.Activity; 22 import android.os.Bundle; 23 import android.view.Menu; 24 import android.view.MenuInflater; 25 import android.view.MenuItem; 26 import android.view.View; 27 import android.widget.AdapterView; 28 import android.widget.ArrayAdapter; 29 import android.widget.LinearLayout; 30 import android.widget.Spinner; 31 import android.widget.TextView; 32 import android.widget.Toast; 33 34 /** 35 * Demonstrates inflating menus from XML. There are different menu XML resources 36 * that the user can choose to inflate. First, select an example resource from 37 * the spinner, and then hit the menu button. To choose another, back out of the 38 * activity and start over. 39 */ 40 public class MenuInflateFromXml extends Activity { 41 /** 42 * Different example menu resources. 43 */ 44 private static final int sMenuExampleResources[] = { 45 R.menu.title_only, R.menu.title_icon, R.menu.submenu, R.menu.groups, 46 R.menu.checkable, R.menu.shortcuts, R.menu.order, R.menu.category_order, 47 R.menu.visible, R.menu.disabled 48 }; 49 50 /** 51 * Names corresponding to the different example menu resources. 52 */ 53 private static final String sMenuExampleNames[] = { 54 "Title only", "Title and Icon", "Submenu", "Groups", 55 "Checkable", "Shortcuts", "Order", "Category and Order", 56 "Visible", "Disabled" 57 }; 58 59 /** 60 * Lets the user choose a menu resource. 61 */ 62 private Spinner mSpinner; 63 64 /** 65 * Shown as instructions. 66 */ 67 private TextView mInstructionsText; 68 69 /** 70 * Safe to hold on to this. 71 */ 72 private Menu mMenu; 73 74 @Override onCreate(Bundle savedInstanceState)75 protected void onCreate(Bundle savedInstanceState) { 76 super.onCreate(savedInstanceState); 77 78 // Create a simple layout 79 LinearLayout layout = new LinearLayout(this); 80 layout.setOrientation(LinearLayout.VERTICAL); 81 82 // Create the spinner to allow the user to choose a menu XML 83 ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, 84 android.R.layout.simple_spinner_item, sMenuExampleNames); 85 adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); 86 mSpinner = new Spinner(this); 87 // When programmatically creating views, make sure to set an ID 88 // so it will automatically save its instance state 89 mSpinner.setId(R.id.spinner); 90 mSpinner.setAdapter(adapter); 91 mSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { 92 @Override 93 public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { 94 invalidateOptionsMenu(); 95 } 96 @Override 97 public void onNothingSelected(AdapterView<?> parent) { 98 } 99 }); 100 101 // Add the spinner 102 layout.addView(mSpinner, 103 new LinearLayout.LayoutParams( 104 LinearLayout.LayoutParams.MATCH_PARENT, 105 LinearLayout.LayoutParams.WRAP_CONTENT)); 106 107 // Create help text 108 mInstructionsText = new TextView(this); 109 mInstructionsText.setText(getResources().getString( 110 R.string.menu_from_xml_instructions_press_menu)); 111 112 // Add the help, make it look decent 113 LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams( 114 LinearLayout.LayoutParams.MATCH_PARENT, 115 LinearLayout.LayoutParams.WRAP_CONTENT); 116 lp.setMargins(10, 10, 10, 10); 117 layout.addView(mInstructionsText, lp); 118 119 // Set the layout as our content view 120 setContentView(layout); 121 } 122 123 @Override onCreateOptionsMenu(Menu menu)124 public boolean onCreateOptionsMenu(Menu menu) { 125 // Hold on to this 126 mMenu = menu; 127 128 // Inflate the currently selected menu XML resource. 129 MenuInflater inflater = getMenuInflater(); 130 inflater.inflate(sMenuExampleResources[mSpinner.getSelectedItemPosition()], menu); 131 132 // Change instructions 133 mInstructionsText.setText(getResources().getString( 134 R.string.menu_from_xml_instructions_go_back)); 135 136 return true; 137 } 138 139 @Override onOptionsItemSelected(MenuItem item)140 public boolean onOptionsItemSelected(MenuItem item) { 141 switch (item.getItemId()) { 142 // For "Title only": Examples of matching an ID with one assigned in 143 // the XML 144 case R.id.jump: 145 Toast.makeText(this, "Jump up in the air!", Toast.LENGTH_SHORT).show(); 146 invalidateOptionsMenu(); 147 return true; 148 149 case R.id.dive: 150 Toast.makeText(this, "Dive into the water!", Toast.LENGTH_SHORT).show(); 151 return true; 152 153 // For "Groups": Toggle visibility of grouped menu items with 154 // nongrouped menu items 155 case R.id.browser_visibility: 156 // The refresh item is part of the browser group 157 final boolean shouldShowBrowser = !mMenu.findItem(R.id.refresh).isVisible(); 158 mMenu.setGroupVisible(R.id.browser, shouldShowBrowser); 159 break; 160 161 case R.id.email_visibility: 162 // The reply item is part of the email group 163 final boolean shouldShowEmail = !mMenu.findItem(R.id.reply).isVisible(); 164 mMenu.setGroupVisible(R.id.email, shouldShowEmail); 165 break; 166 167 // Generic catch all for all the other menu resources 168 default: 169 // Don't toast text when a submenu is clicked 170 if (!item.hasSubMenu()) { 171 Toast.makeText(this, item.getTitle(), Toast.LENGTH_SHORT).show(); 172 return true; 173 } 174 break; 175 } 176 177 return false; 178 } 179 180 181 182 } 183