Java tutorial
/* * Copyright (C) 2013 Antonio Leiva * Copyright (C) 2013 Manuel Peinado * * 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.zftlive.android.sample.fadingactionbar; import android.annotation.SuppressLint; import android.app.Activity; import android.app.Fragment; import android.app.FragmentManager; import android.content.res.Configuration; import android.content.res.TypedArray; import android.os.Bundle; import android.support.v4.app.ActionBarDrawerToggle; import android.support.v4.view.GravityCompat; import android.support.v4.widget.DrawerLayout; import android.view.MenuItem; import android.view.View; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.ListView; import com.zftlive.android.R; import com.zftlive.android.library.common.ActionBarManager; public class NavigationDrawerActivity extends Activity implements AdapterView.OnItemClickListener { private DrawerLayout mDrawerLayout; private ListView mDrawerList; private ActionBarDrawerToggle mDrawerToggle; private CharSequence mDrawerTitle; private CharSequence mTitle; private String[] mCityNames; private int[] mCityImages; @SuppressLint("NewApi") @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_navigation_drawer); mTitle = mDrawerTitle = getTitle(); mCityNames = getResources().getStringArray(R.array.drawer_items); TypedArray typedArray = getResources().obtainTypedArray(R.array.city_images); mCityImages = new int[typedArray.length()]; for (int i = 0; i < typedArray.length(); ++i) { mCityImages[i] = typedArray.getResourceId(i, 0); } typedArray.recycle(); mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); mDrawerList = (ListView) findViewById(R.id.left_drawer); // set a custom shadow that overlays the main content when the drawer opens mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START); // set up the drawer's list view with items and click listener mDrawerList.setAdapter(new ArrayAdapter<String>(this, R.layout.drawer_list_item, mCityNames)); mDrawerList.setOnItemClickListener(this); // enable ActionBar app icon to behave as action to toggle nav drawer getActionBar().setDisplayHomeAsUpEnabled(true); getActionBar().setHomeButtonEnabled(true); // ActionBarDrawerToggle ties together the the proper interactions // between the sliding drawer and the action bar app icon mDrawerToggle = new ActionBarDrawerToggle(this, /* host Activity */ mDrawerLayout, /* DrawerLayout object */ R.drawable.ic_drawer, /* nav drawer image to replace 'Up' caret */ R.string.drawer_open, /* "open drawer" description for accessibility */ R.string.drawer_close /* "close drawer" description for accessibility */ ) { public void onDrawerClosed(View view) { getActionBar().setTitle(mTitle); } public void onDrawerOpened(View drawerView) { getActionBar().setTitle(mDrawerTitle); } }; mDrawerLayout.setDrawerListener(mDrawerToggle); if (savedInstanceState == null) { selectItem(0); } //?? ActionBarManager.initBackTitle(this, getActionBar(), this.getClass().getSimpleName()); } @Override protected void onPostCreate(Bundle savedInstanceState) { super.onPostCreate(savedInstanceState); // Sync the toggle state after onRestoreInstanceState has occurred. mDrawerToggle.syncState(); } @Override public void onConfigurationChanged(Configuration newConfig) { super.onConfigurationChanged(newConfig); // Pass any configuration change to the drawer toggles mDrawerToggle.onConfigurationChanged(newConfig); } @Override public boolean onOptionsItemSelected(MenuItem item) { return mDrawerToggle.onOptionsItemSelected(item) || super.onOptionsItemSelected(item); } @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { selectItem(position); } @SuppressLint("NewApi") private void selectItem(int position) { // update the main content by replacing fragments Fragment fragment = new SampleFragment(); Bundle args = new Bundle(); args.putInt(SampleFragment.ARG_IMAGE_RES, mCityImages[position]); args.putInt(SampleFragment.ARG_ACTION_BG_RES, R.drawable.ab_background); fragment.setArguments(args); FragmentManager fragmentManager = getFragmentManager(); fragmentManager.beginTransaction().replace(R.id.content_frame, fragment).commit(); // update selected item and title, then close the drawer mDrawerList.setItemChecked(position, true); setTitle(mCityNames[position]); mDrawerLayout.closeDrawer(mDrawerList); } @SuppressLint("NewApi") @Override public void setTitle(CharSequence title) { mTitle = title; getActionBar().setTitle(mTitle); } }