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/*
* Copyright (C) 2014 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 com.example.android.supportv7.Shakespeare;
import android.content.res.Configuration;
import android.os.Bundle;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBar;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;
public class ActionBarWithDrawerLayout extends AppCompatActivity {
private DrawerLayout mDrawerLayout;
private ListView mDrawer;
private TextView mContent;
private ActionBarHelper mActionBar;
private ActionBarDrawerToggle mDrawerToggle;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.action_bar_drawer_layout);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
mDrawer = (ListView) findViewById(R.id.start_drawer);
mContent = (TextView) findViewById(R.id.content_text);
mDrawerLayout.setDrawerListener(new DemoDrawerListener());
// The drawer title must be set in order to announce state changes when
// accessibility is turned on. This is typically a simple description,
// e.g. "Navigation".
mDrawerLayout.setDrawerTitle(GravityCompat.START, getString(R.string.drawer_title));
mDrawer.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,
Shakespeare.TITLES));
mDrawer.setOnItemClickListener(new DrawerItemClickListener());
mActionBar = createActionBarHelper();
mActionBar.init();
// ActionBarDrawerToggle provides convenient helpers for tying together the
// prescribed interactions between a top-level sliding drawer and the action bar.
mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,
R.string.drawer_open, R.string.drawer_close);
}
@Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
// Sync the toggle state after onRestoreInstanceState has occurred.
mDrawerToggle.syncState();
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
/*
* The action bar home/up action should open or close the drawer.
* mDrawerToggle will take care of this.
*/
if (mDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
mDrawerToggle.onConfigurationChanged(newConfig);
}
/**
* This list item click listener implements very simple view switching by changing
* the primary content text. The drawer is closed when a selection is made.
*/
private class DrawerItemClickListener implements ListView.OnItemClickListener {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
mContent.setText(Shakespeare.DIALOGUE[position]);
mActionBar.setTitle(Shakespeare.TITLES[position]);
mDrawerLayout.closeDrawer(mDrawer);
}
}
/**
* A drawer listener can be used to respond to drawer events such as becoming
* fully opened or closed. You should always prefer to perform expensive operations
* such as drastic relayout when no animation is currently in progress, either before
* or after the drawer animates.
*
* When using ActionBarDrawerToggle, all DrawerLayout listener methods should be forwarded
* if the ActionBarDrawerToggle is not used as the DrawerLayout listener directly.
*/
private class DemoDrawerListener implements DrawerLayout.DrawerListener {
@Override
public void onDrawerOpened(View drawerView) {
mDrawerToggle.onDrawerOpened(drawerView);
mActionBar.onDrawerOpened();
}
@Override
public void onDrawerClosed(View drawerView) {
mDrawerToggle.onDrawerClosed(drawerView);
mActionBar.onDrawerClosed();
}
@Override
public void onDrawerSlide(View drawerView, float slideOffset) {
mDrawerToggle.onDrawerSlide(drawerView, slideOffset);
}
@Override
public void onDrawerStateChanged(int newState) {
mDrawerToggle.onDrawerStateChanged(newState);
}
}
/**
* Create a compatible helper that will manipulate the action bar if available.
*/
private ActionBarHelper createActionBarHelper() {
return new ActionBarHelper();
}
/**
* Action bar helper for use on ICS and newer devices.
*/
private class ActionBarHelper {
private final ActionBar mActionBar;
private CharSequence mDrawerTitle;
private CharSequence mTitle;
ActionBarHelper() {
mActionBar = getSupportActionBar();
}
public void init() {
mActionBar.setDisplayHomeAsUpEnabled(true);
mActionBar.setDisplayShowHomeEnabled(false);
mTitle = mDrawerTitle = getTitle();
}
/**
* When the drawer is closed we restore the action bar state reflecting
* the specific contents in view.
*/
public void onDrawerClosed() {
mActionBar.setTitle(mTitle);
}
/**
* When the drawer is open we set the action bar to a generic title.
* The action bar should only contain data relevant at the top level of
* the nav hierarchy represented by the drawer, as the rest of your content
* will be dimmed down and non-interactive.
*/
public void onDrawerOpened() {
mActionBar.setTitle(mDrawerTitle);
}
public void setTitle(CharSequence title) {
mTitle = title;
}
}
}
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