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 package com.example.android.supportv7.app; 17 18 import com.example.android.supportv7.Shakespeare; 19 20 import android.support.v7.app.ActionBarActivity; 21 import android.content.res.Configuration; 22 import android.os.Bundle; 23 import android.support.v4.view.GravityCompat; 24 import android.support.v4.widget.DrawerLayout; 25 import android.support.v7.app.ActionBar; 26 import android.support.v7.app.ActionBarDrawerToggle; 27 import android.view.MenuItem; 28 import android.view.View; 29 import android.widget.AdapterView; 30 import android.widget.ArrayAdapter; 31 import android.widget.ListView; 32 import android.widget.TextView; 33 import com.example.android.supportv7.R; 34 35 public class ActionBarWithDrawerLayout extends ActionBarActivity { 36 private DrawerLayout mDrawerLayout; 37 private ListView mDrawer; 38 private TextView mContent; 39 40 private ActionBarHelper mActionBar; 41 42 private ActionBarDrawerToggle mDrawerToggle; 43 44 @Override 45 protected void onCreate(Bundle savedInstanceState) { 46 super.onCreate(savedInstanceState); 47 setContentView(R.layout.action_bar_drawer_layout); 48 mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); 49 mDrawer = (ListView) findViewById(R.id.start_drawer); 50 mContent = (TextView) findViewById(R.id.content_text); 51 52 mDrawerLayout.setDrawerListener(new DemoDrawerListener()); 53 54 // The drawer title must be set in order to announce state changes when 55 // accessibility is turned on. This is typically a simple description, 56 // e.g. "Navigation". 57 mDrawerLayout.setDrawerTitle(GravityCompat.START, getString(R.string.drawer_title)); 58 59 mDrawer.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, 60 Shakespeare.TITLES)); 61 mDrawer.setOnItemClickListener(new DrawerItemClickListener()); 62 63 mActionBar = createActionBarHelper(); 64 mActionBar.init(); 65 66 // ActionBarDrawerToggle provides convenient helpers for tying together the 67 // prescribed interactions between a top-level sliding drawer and the action bar. 68 mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout, 69 R.string.drawer_open, R.string.drawer_close); 70 } 71 72 @Override 73 protected void onPostCreate(Bundle savedInstanceState) { 74 super.onPostCreate(savedInstanceState); 75 76 // Sync the toggle state after onRestoreInstanceState has occurred. 77 mDrawerToggle.syncState(); 78 } 79 80 @Override 81 public boolean onOptionsItemSelected(MenuItem item) { 82 /* 83 * The action bar home/up action should open or close the drawer. 84 * mDrawerToggle will take care of this. 85 */ 86 if (mDrawerToggle.onOptionsItemSelected(item)) { 87 return true; 88 } 89 return super.onOptionsItemSelected(item); 90 } 91 92 @Override 93 public void onConfigurationChanged(Configuration newConfig) { 94 super.onConfigurationChanged(newConfig); 95 mDrawerToggle.onConfigurationChanged(newConfig); 96 } 97 98 /** 99 * This list item click listener implements very simple view switching by changing 100 * the primary content text. The drawer is closed when a selection is made. 101 */ 102 private class DrawerItemClickListener implements ListView.OnItemClickListener { 103 @Override 104 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 105 mContent.setText(Shakespeare.DIALOGUE[position]); 106 mActionBar.setTitle(Shakespeare.TITLES[position]); 107 mDrawerLayout.closeDrawer(mDrawer); 108 } 109 } 110 111 /** 112 * A drawer listener can be used to respond to drawer events such as becoming 113 * fully opened or closed. You should always prefer to perform expensive operations 114 * such as drastic relayout when no animation is currently in progress, either before 115 * or after the drawer animates. 116 * 117 * When using ActionBarDrawerToggle, all DrawerLayout listener methods should be forwarded 118 * if the ActionBarDrawerToggle is not used as the DrawerLayout listener directly. 119 */ 120 private class DemoDrawerListener implements DrawerLayout.DrawerListener { 121 @Override 122 public void onDrawerOpened(View drawerView) { 123 mDrawerToggle.onDrawerOpened(drawerView); 124 mActionBar.onDrawerOpened(); 125 } 126 127 @Override 128 public void onDrawerClosed(View drawerView) { 129 mDrawerToggle.onDrawerClosed(drawerView); 130 mActionBar.onDrawerClosed(); 131 } 132 133 @Override 134 public void onDrawerSlide(View drawerView, float slideOffset) { 135 mDrawerToggle.onDrawerSlide(drawerView, slideOffset); 136 } 137 138 @Override 139 public void onDrawerStateChanged(int newState) { 140 mDrawerToggle.onDrawerStateChanged(newState); 141 } 142 } 143 144 /** 145 * Create a compatible helper that will manipulate the action bar if available. 146 */ 147 private ActionBarHelper createActionBarHelper() { 148 return new ActionBarHelper(); 149 } 150 151 /** 152 * Action bar helper for use on ICS and newer devices. 153 */ 154 private class ActionBarHelper { 155 private final ActionBar mActionBar; 156 private CharSequence mDrawerTitle; 157 private CharSequence mTitle; 158 159 ActionBarHelper() { 160 mActionBar = getSupportActionBar(); 161 } 162 163 public void init() { 164 mActionBar.setDisplayHomeAsUpEnabled(true); 165 mActionBar.setDisplayShowHomeEnabled(false); 166 mTitle = mDrawerTitle = getTitle(); 167 } 168 169 /** 170 * When the drawer is closed we restore the action bar state reflecting 171 * the specific contents in view. 172 */ 173 public void onDrawerClosed() { 174 mActionBar.setTitle(mTitle); 175 } 176 177 /** 178 * When the drawer is open we set the action bar to a generic title. 179 * The action bar should only contain data relevant at the top level of 180 * the nav hierarchy represented by the drawer, as the rest of your content 181 * will be dimmed down and non-interactive. 182 */ 183 public void onDrawerOpened() { 184 mActionBar.setTitle(mDrawerTitle); 185 } 186 187 public void setTitle(CharSequence title) { 188 mTitle = title; 189 } 190 } 191 } 192