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Diffstat (limited to 'samples/Support7Demos/src/com/example/android/supportv7/widget/DrawerLayoutActivity.java')
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diff --git a/samples/Support7Demos/src/com/example/android/supportv7/widget/DrawerLayoutActivity.java b/samples/Support7Demos/src/com/example/android/supportv7/widget/DrawerLayoutActivity.java new file mode 100644 index 000000000..8cdf927c2 --- /dev/null +++ b/samples/Support7Demos/src/com/example/android/supportv7/widget/DrawerLayoutActivity.java @@ -0,0 +1,197 @@ +/* + * Copyright (C) 2015 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.widget; + +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.ActionBarDrawerToggle; +import android.support.v7.app.AppCompatActivity; +import android.support.v7.widget.Toolbar; +import android.view.MenuItem; +import android.view.View; +import android.widget.AdapterView; +import android.widget.ArrayAdapter; +import android.widget.ListView; +import android.widget.TextView; +import com.example.android.supportv7.R; +import com.example.android.supportv7.Shakespeare; + +/** + * This example illustrates a common usage of the DrawerLayout widget combined with Toolbar + * in the Android support library that respect the + * <a href="https://www.google.com/design/spec/patterns/navigation-drawer.html">Material design + * guidelines</a> for the drawer component. + * + * + * <p>A DrawerLayout should be positioned at the top of your view hierarchy, placing it + * below the action bar but above your content views. The primary content should match_parent + * in both dimensions. Each drawer should define a reasonable width and match_parent for height. + * Drawer views should be positioned after the content view in your layout to preserve proper + * ordering.</p> + * + * <p>When a navigation (left) drawer is present, the host activity should detect presses of + * the action bar's Up affordance as a signal to open and close the navigation drawer. + * Items within the drawer should fall into one of two categories.</p> + * + * <ul> + * <li><strong>View switches</strong>. A view switch follows the same basic policies as + * list or tab navigation in that a view switch does not create navigation history. + * This pattern should only be used at the root activity of a task, leaving some form + * of Up navigation active for activities further down the navigation hierarchy.</li> + * <li><strong>Selective Up</strong>. The drawer allows the user to choose an alternate + * parent for Up navigation. This allows a user to jump across an app's navigation + * hierarchy at will. The application should treat this as it treats Up navigation from + * a different task, replacing the current task stack using TaskStackBuilder or similar. + * This is the only form of navigation drawer that should be used outside of the root + * activity of a task.</li> + * </ul> + * + * <p>Right side drawers should be used for actions, not navigation. This follows the pattern + * established by the Action Bar that navigation should be to the left and actions to the right. + * An action should be an operation performed on the current contents of the window, + * for example enabling or disabling a data overlay on top of the current content.</p> + * + * <p>When the drawer is open, it is above the application toolbar. On Lollipop versions of the + * platform and above the drawer spans the full height of the screen, including behind the system + * status bar.</p> + */ +public class DrawerLayoutActivity extends AppCompatActivity { + private DrawerLayout mDrawerLayout; + private ListView mDrawer; + private TextView mContent; + + private ActionBarDrawerToggle mDrawerToggle; + private Toolbar mToolbar; + + @Override + protected void onCreate(Bundle savedInstanceState) { + super.onCreate(savedInstanceState); + + setContentView(R.layout.drawer_layout); + + mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); + mDrawer = (ListView) findViewById(R.id.start_drawer); + mContent = (TextView) findViewById(R.id.content_text); + + mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START); + + // 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()); + + // Find the toolbar in our layout and set it as the support action bar on the activity. + // This is required to have the drawer slide "over" the toolbar. + mToolbar = (Toolbar) findViewById(R.id.toolbar); + mToolbar.setTitle(R.string.drawer_title); + setSupportActionBar(mToolbar); + + getSupportActionBar().setDisplayHomeAsUpEnabled(true); + getSupportActionBar().setDisplayShowHomeEnabled(false); + + // ActionBarDrawerToggle provides convenient helpers for tying together the + // prescribed interactions between a top-level sliding drawer and the action bar. + // Note that, as the Javadocs of ActionBarDrawerToggle constructors say, we are + // *not* using a constructor that gets a Toolbar since we're setting our toolbar + // dynamically at runtime. Furthermore, as the drawer is sliding over the toolbar, + // we are suppressing the morphing animation from hamburger to back arrow by + // calling super.onDrawerSlide with slideOffset=0.0f. In case your app only has + // top-level pages and doesn't need back arrow visuals at all, you can set up + // your activity theme to have attribute named "drawerArrowStyle" that points + // to an extension of Widget.AppCompat.DrawerArrowToggle that has its "spinBars" + // attribute set to false. + mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout, + R.string.drawer_open, R.string.drawer_close) { + @Override + public void onDrawerOpened(View drawerView) { + super.onDrawerOpened(drawerView); + super.onDrawerSlide(drawerView, 0.0f); + } + + @Override + public void onDrawerSlide(View drawerView, float slideOffset) { + super.onDrawerSlide(drawerView, 0.0f); + } + }; + + mDrawerLayout.setDrawerListener(mDrawerToggle); + + // Configure the background color fill of the system status bar (on supported platform + // versions) and the toolbar itself. We're using the same color, and android:statusBar + // from the theme makes the status bar slightly darker. + final int metalBlueColor = getResources().getColor(R.color.drawer_sample_metal_blue); + mDrawerLayout.setStatusBarBackgroundColor(metalBlueColor); + mToolbar.setBackgroundColor(metalBlueColor); + } + + @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. + * The drawer toggle will take care of this. + */ + if (mDrawerToggle.onOptionsItemSelected(item)) { + return true; + } + return super.onOptionsItemSelected(item); + } + + @Override + public void onBackPressed() { + // Is the drawer open? + if (mDrawerLayout.isDrawerOpen(mDrawer)) { + // Close the drawer and return. + mDrawerLayout.closeDrawer(mDrawer); + return; + } + + super.onBackPressed(); + } + + @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]); + mToolbar.setTitle(Shakespeare.TITLES[position]); + mDrawerLayout.closeDrawer(mDrawer); + } + } +} |