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.souvenir.android; import java.util.Locale; import android.content.Context; import android.content.SharedPreferences; import android.content.res.Configuration; import android.content.res.Resources; import android.os.Bundle; import android.support.v4.app.ActionBarDrawerToggle; import android.support.v4.app.DialogFragment; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentManager; import android.support.v4.view.GravityCompat; import android.support.v4.widget.DrawerLayout; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.ImageView; import android.widget.ListView; import android.widget.TextView; import com.actionbarsherlock.app.SherlockFragmentActivity; import com.actionbarsherlock.view.Menu; import com.actionbarsherlock.view.MenuItem; import com.nostra13.universalimageloader.core.ImageLoader; import com.nostra13.universalimageloader.core.ImageLoaderConfiguration; /** * 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 DrawerActivity extends SherlockFragmentActivity { private static final int TRIPS_POSITION = 0; private static final int COMPLETED_POSITION = 1; private static final int SETTINGS_POSITION = 2; boolean autosync = false; public boolean isAutosync() { return autosync; } public void setAutosync(boolean autosync) { this.autosync = autosync; } private DrawerLayout mDrawerLayout; private ListView mDrawerList; private ActionBarDrawerToggle mDrawerToggle; private CharSequence mDrawerTitle; private CharSequence mTitle; private String[] mDrawerTitles; SharedPreferences prefs; public class aa extends ArrayAdapter<String> { int resource; String[] objects; public aa(Context context, int resource, String[] objects) { super(context, resource, objects); this.resource = resource; this.objects = objects; // TODO Auto-generated constructor stub } @Override public View getView(int position, View convertView, ViewGroup parent) { if (convertView == null) { LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE); convertView = inflater.inflate(resource, null, false); } else { } TextView tv = (TextView) convertView; switch (position) { case 0: tv.setBackgroundColor(getResources().getColor(R.color.primaryRed2)); break; case 1: tv.setBackgroundColor(getResources().getColor(R.color.primaryRed3)); break; case 2: tv.setBackgroundColor(getResources().getColor(R.color.primaryRed4)); break; } tv.setText(objects[position]); tv.setHeight(mDrawerLayout.getHeight() / objects.length); return convertView; } } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_drawer); STrip strip = new STrip("uncategorized"); strip.setDirty(true); strip.insert(this); if (!ImageLoader.getInstance().isInited()) { ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(this.getApplicationContext()) .threadPriority(Thread.NORM_PRIORITY - 2).denyCacheImageMultipleSizesInMemory() /* .enableLogging() */.build(); ImageLoader.getInstance().init(config); } mTitle = mDrawerTitle = getTitle(); mDrawerTitles = getResources().getStringArray(R.array.drawer_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 aa(this, R.layout.drawer_list_item, mDrawerTitles)); mDrawerList.setOnItemClickListener(new DrawerItemClickListener()); // enable ActionBar app icon to behave as action to toggle nav drawer getSupportActionBar().setDisplayHomeAsUpEnabled(true); getSupportActionBar().setHomeButtonEnabled(true); int titleId = Resources.getSystem().getIdentifier("action_bar_title", "id", "android"); TextView yourTextView = (TextView) findViewById(titleId); yourTextView.setTextColor(getResources().getColor(android.R.color.white)); prefs = getSharedPreferences(getPackageName(), Context.MODE_PRIVATE); if (prefs.contains("autosync")) { autosync = prefs.getBoolean("autosync", false); } // 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) { // String curTitle = (String) getSupportActionBar().getTitle(); // if (curTitle.toString().contains(":")) // { // setTitle(curTitle); // } // else // { // // getSupportActionBar().setTitle(mTitle); // } getSupportActionBar().setTitle(mTitle); invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu() } public void onDrawerOpened(View drawerView) { getSupportActionBar().setTitle(mDrawerTitle); invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu() } }; mDrawerLayout.setDrawerListener(mDrawerToggle); if (savedInstanceState == null) { selectItem(COMPLETED_POSITION); } } // @Override // public boolean onCreateOptionsMenu(Menu menu) // { // MenuInflater inflater = getSupportMenuInflater(); // // inflater.inflate(R.menu.main_menu, 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; // } if (item.getItemId() == android.R.id.home) { if (mDrawerLayout.isDrawerOpen(mDrawerList)) { mDrawerLayout.closeDrawer(mDrawerList); } else { mDrawerLayout.openDrawer(mDrawerList); } 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, getSupportActionBar().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); } } private void selectItem(int position) { Fragment fragment = null; switch (position) { // case 0: // fragment = new PlanetFragment(); // Bundle args = new Bundle(); // args.putInt(PlanetFragment.ARG_PLANET_NUMBER, position); // fragment.setArguments(args); // break; case TRIPS_POSITION: fragment = new TripsFragment(); Bundle args2 = new Bundle(); // args2.putInt(PlanetFragment.ARG_PLANET_NUMBER, position); // fragment.setArguments(args2); break; case COMPLETED_POSITION: // update the main content by replacing fragments fragment = new SnippetFragment(); break; case SETTINGS_POSITION: fragment = new SettingsFragment(); break; } // FragmentTransaction transaction = getSupportFragmentManager() // .beginTransaction(); // transaction.replace(R.id.content_frame, fragment); // transaction.addToBackStack(null); // transaction.commit(); FragmentManager fragmentManager = getSupportFragmentManager(); fragmentManager.beginTransaction().replace(R.id.content_frame, fragment).commit(); invalidateOptionsMenu(); // update selected item and title, then close the drawer mDrawerList.setItemChecked(position, true); setTitle(mDrawerTitles[position]); mDrawerLayout.closeDrawer(mDrawerList); } @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); } /** * Fragment that appears in the "content_frame", shows a planet */ public static class PlanetFragment extends Fragment { public static final String ARG_PLANET_NUMBER = "planet_number"; public PlanetFragment() { // Empty constructor required for fragment subclasses } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.fragment_planet, container, false); int i = getArguments().getInt(ARG_PLANET_NUMBER); String planet = getResources().getStringArray(R.array.drawer_array)[i]; int imageId = getResources().getIdentifier(planet.toLowerCase(Locale.getDefault()), "drawable", getActivity().getPackageName()); ((ImageView) rootView.findViewById(R.id.image)).setImageResource(imageId); getActivity().setTitle(planet); return rootView; } } public interface TripDialogListener { public void onDialogPositiveClick(DialogFragment dialog); public void onDialogNegativeClick(DialogFragment dialog); } @Override public void onBackPressed() { invalidateOptionsMenu(); System.out.println("Back Button Pressed"); System.out.println(getSupportFragmentManager().getBackStackEntryCount()); if (getSupportFragmentManager().getBackStackEntryCount() > 0) { getSupportFragmentManager().popBackStack(); } else if (!mDrawerLayout.isDrawerOpen(mDrawerList)) { mDrawerLayout.openDrawer(mDrawerList); } else { super.onBackPressed(); } // if (mDrawerLayout.isDrawerOpen(mDrawerList)) // { // super.onBackPressed(); // } // else // { // mDrawerLayout.openDrawer(mDrawerList); // } } }