Java tutorial
/* * Copyright 2013 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.shawbeat; import java.util.ArrayList; import java.util.List; import android.content.res.Configuration; import android.os.Bundle; import android.support.v4.app.ActionBarDrawerToggle; import android.support.v4.view.GravityCompat; import android.support.v4.widget.DrawerLayout; import android.support.v7.app.ActionBarActivity; import android.view.MenuItem; import android.view.View; import android.view.Window; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.ListView; import android.widget.Toast; import com.database.EditionDBHelper; import com.handmark.pulltorefresh.library.PullToRefreshBase; import com.handmark.pulltorefresh.library.PullToRefreshBase.OnRefreshListener; import com.handmark.pulltorefresh.library.PullToRefreshListView; import com.network.DownloadEdition; /** * This example illustrates a common usage of the DrawerLayout widget * in the Android support library. * <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. The * ActionBarDrawerToggle facilitates this behavior. * Items within the drawer should fall into one of two categories:</p> * <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/> * <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> */ public class MainActivity extends ActionBarActivity implements DownloadEdition.DownloadEditionCompleteListener { private DrawerLayout mDrawerLayout; private PullToRefreshListView mRefreshDrawerList; private ArrayAdapter<String> mAdapter; private ActionBarDrawerToggle mDrawerToggle; private CharSequence mTitle; private List<Edition> mEdition = new ArrayList<Edition>(); private ArrayList<String> mDrawerTitles = new ArrayList<String>(); private boolean firstLaunch = true; private EditionDBHelper editionDBHelper = new EditionDBHelper(MainActivity.this); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // set up progress bar on actionbar requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS); setContentView(R.layout.activity_main); // enable ActionBar app icon to behave as action to toggle nav drawer getSupportActionBar().setDisplayHomeAsUpEnabled(true); getSupportActionBar().setHomeButtonEnabled(true); mTitle = getTitle(); mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); // set a custom shadow that overlays the main content when the drawer opens mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START); //*** disable swipe to avoid touch event conflict between nav drawer and pull-to-refresh *** mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED); // 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) { getSupportActionBar().setTitle(mTitle); } public void onDrawerOpened(View drawerView) { //getSupportActionBar().setTitle(mDrawerTitle); } }; mDrawerLayout.setDrawerListener(mDrawerToggle); mRefreshDrawerList = (PullToRefreshListView) findViewById(R.id.left_drawer); mRefreshDrawerList.getRefreshableView().setOnItemClickListener(new DrawerItemClickListener()); mRefreshDrawerList.setOnRefreshListener(new OnRefreshListener<ListView>() { @Override public void onRefresh(PullToRefreshBase<ListView> refreshView) { new DownloadEdition(MainActivity.this, MainActivity.this).execute(); } }); // db get all edition List<Edition> cache = editionDBHelper.getAllEdition(); if (cache != null) { for (Edition e : cache) { mDrawerTitles.add(e.getEdition_name()); } } // set list adapter mAdapter = new ArrayAdapter<String>(this, R.layout.drawer_list_item, mDrawerTitles); mRefreshDrawerList.setAdapter(mAdapter); // show refreshing view onCreate() new DownloadEdition(this, this).execute(); } @Override public boolean onOptionsItemSelected(MenuItem item) { // The action bar home/up action should open or close the drawer. // ActionBarDrawerToggle will take care of this. if (mDrawerToggle.onOptionsItemSelected(item)) { return true; } return super.onOptionsItemSelected(item); } /* The click listner for ListView in the navigation drawer */ private class DrawerItemClickListener implements ListView.OnItemClickListener { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { selectItem(position - 1); } } private void selectItem(int position) { // update the main content by replacing fragments ContentFrameFragment fragment = new ContentFrameFragment(); Bundle args = new Bundle(); args.putInt("ed_id", Integer.valueOf(mEdition.get(position).getEdition_ID())); fragment.setArguments(args); getSupportFragmentManager().beginTransaction().add(R.id.content_frame, fragment).commit(); setTitle(mDrawerTitles.get(position)); mDrawerLayout.closeDrawer(mRefreshDrawerList); } @Override public void setTitle(CharSequence title) { mTitle = title; getSupportActionBar().setTitle(mTitle); } /** * When using the ActionBarDrawerToggle, you must call it during * onPostCreate() and onConfigurationChanged()... */ @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 toggls mDrawerToggle.onConfigurationChanged(newConfig); } @Override public void downloadEditionResultCallback(List<Edition> s) { if (s != null) { mEdition = s; if (mDrawerTitles.size() > 0) mDrawerTitles.clear(); for (Edition e : s) { mDrawerTitles.add(e.getEdition_name()); } mAdapter.notifyDataSetChanged(); editionDBHelper.insertEdition(s); if (firstLaunch) { selectItem(0); firstLaunch = !firstLaunch; } } else { Toast.makeText(getApplicationContext(), "Network Error", Toast.LENGTH_LONG).show(); } // Call onRefreshComplete when the list has been refreshed. mRefreshDrawerList.onRefreshComplete(); } public void setProgressBarIndeterminateVisible() { setProgressBarIndeterminateVisibility(true); } public void setProgressBarIndeterminateInvisible() { setProgressBarIndeterminateVisibility(false); } }