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.wx.demo; import android.app.Activity; import android.app.Fragment; import android.app.FragmentManager; import android.app.SearchManager; import android.content.Intent; 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.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.View; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.ListView; import android.widget.Toast; import com.wx.demo.R; import com.wx.demo.aidl.AIDLFragment; import com.wx.demo.animation.AnimationFragment; import com.wx.demo.blur.BlurFragment; import com.wx.demo.drag.DragFragment; import com.wx.demo.fallswall.FallsWallFragment; import com.wx.demo.fallswall.TwoListFragment; import com.wx.demo.feedback.FeedbackFragment; import com.wx.demo.highlight.HighLightFragment; import com.wx.demo.notify.NotifyFragment; import com.wx.demo.scaleanimation.ScaleFragment; import com.wx.demo.scrollview.ScrollViewFallWallFragment; import com.wx.demo.t9.T9Fragment; import com.wx.demo.test.TestFragment; import com.wx.demo.wave.WaveFragment; public class MainActivity extends Activity { private DrawerLayout mDrawerLayout; private ListView mDrawerList; private ActionBarDrawerToggle mDrawerToggle; private CharSequence mDrawerTitle; private CharSequence mTitle; private String[] mTitles; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mTitle = mDrawerTitle = getTitle(); mTitles = getResources().getStringArray(R.array.title_array); 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, mTitles)); mDrawerList.setOnItemClickListener(new DrawerItemClickListener()); // 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); invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu() } public void onDrawerOpened(View drawerView) { getActionBar().setTitle(mDrawerTitle); invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu() } }; mDrawerLayout.setDrawerListener(mDrawerToggle); if (savedInstanceState == null) { selectItem(0); } } @Override public boolean onCreateOptionsMenu(Menu menu) { MenuInflater inflater = getMenuInflater(); inflater.inflate(R.menu.main, menu); return super.onCreateOptionsMenu(menu); } /* Called whenever we call invalidateOptionsMenu() */ @Override public boolean onPrepareOptionsMenu(Menu menu) { // If the nav drawer is open, hide action items related to the content view boolean drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList); menu.findItem(R.id.action_websearch).setVisible(!drawerOpen); return super.onPrepareOptionsMenu(menu); } @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; } // Handle action buttons switch (item.getItemId()) { case R.id.action_websearch: // create intent to perform web search for this planet Intent intent = new Intent(Intent.ACTION_WEB_SEARCH); intent.putExtra(SearchManager.QUERY, getActionBar().getTitle()); // catch event that there's no activity to handle intent if (intent.resolveActivity(getPackageManager()) != null) { startActivity(intent); } else { Toast.makeText(this, R.string.app_not_available, Toast.LENGTH_LONG).show(); } return true; default: 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); } } Fragment testFragment, waveFragment, feedbackFragment, blurFragment, animFragment, aidlFragment, scaleFragment, notifyFragment, dragFragment, t9Fragment, highLightFragment, fallsWallFragment, twoFragment, scrollFallWallFragment; private void selectItem(int position) { // update the main content by replacing fragments switch (position) { case 0: { if (testFragment == null) { testFragment = new TestFragment(); } go2Fragment(testFragment); } break; case 1: { if (feedbackFragment == null) { feedbackFragment = new FeedbackFragment(); } go2Fragment(feedbackFragment); } break; case 2: if (waveFragment == null) { waveFragment = new WaveFragment(); } go2Fragment(waveFragment); break; case 3: if (blurFragment == null) { blurFragment = new BlurFragment(); } go2Fragment(blurFragment); break; case 4: if (animFragment == null) { animFragment = new AnimationFragment(); } go2Fragment(animFragment); break; case 5: if (aidlFragment == null) { aidlFragment = new AIDLFragment(); } go2Fragment(aidlFragment); break; case 6: if (scaleFragment == null) { scaleFragment = new ScaleFragment(); } go2Fragment(scaleFragment); break; case 7: if (notifyFragment == null) { notifyFragment = new NotifyFragment(); } go2Fragment(notifyFragment); break; case 8: if (dragFragment == null) { dragFragment = new DragFragment(); } go2Fragment(dragFragment); break; case 9: if (t9Fragment == null) { t9Fragment = new T9Fragment(); } go2Fragment(t9Fragment); break; case 10: if (highLightFragment == null) { highLightFragment = new HighLightFragment(); } go2Fragment(highLightFragment); break; case 11: if (fallsWallFragment == null) { fallsWallFragment = new FallsWallFragment(); } go2Fragment(fallsWallFragment); break; case 12: if (twoFragment == null) { twoFragment = new TwoListFragment(); } go2Fragment(twoFragment); break; case 13: if (scrollFallWallFragment == null) { scrollFallWallFragment = new ScrollViewFallWallFragment(); } go2Fragment(scrollFallWallFragment); break; } // update selected item and title, then close the drawer mDrawerList.setItemChecked(position, true); setTitle(mTitles[position]); mDrawerLayout.closeDrawer(mDrawerList); } void go2Fragment(Fragment fragment) { FragmentManager fragmentManager = getFragmentManager(); fragmentManager.beginTransaction().replace(R.id.content_frame, fragment).commit(); } @Override public void setTitle(CharSequence title) { mTitle = title; getActionBar().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); } }