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 it.meet.activities; import it.meet.fragments.*; import it.meet.R; import android.app.Activity; import android.app.AlertDialog; import android.app.Fragment; import android.app.FragmentManager; import android.app.SearchManager; import android.content.DialogInterface; import android.content.Intent; import android.content.SharedPreferences; import android.content.SharedPreferences.Editor; 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.util.Log; 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.FrameLayout; import android.widget.ListView; import android.widget.RelativeLayout; import android.widget.Toast; public class MainActivity extends Activity { private DrawerLayout mDrawerLayout; public ListView mDrawerList; private ActionBarDrawerToggle mDrawerToggle; private CharSequence mDrawerTitle; private CharSequence mTitle; private String[] framentsTitles; private SearchFragment searchFragment; static SharedPreferences storedInfo; public Fragment currentFragment; Editor preferencesEditor; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main_activity); mTitle = mDrawerTitle = getTitle(); framentsTitles = getResources().getStringArray(R.array.menu_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, framentsTitles)); 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 */ ) { @Override public void onDrawerClosed(View view) { getActionBar().setTitle(mTitle); invalidateOptionsMenu(); // creates call to // onPrepareOptionsMenu() } @Override 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 listener 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); } } public void selectItem(int position) { // update the main content by replacing fragments Log.w("Position", "position=" + position); if (position == 0 && !(currentFragment instanceof SearchFragment)) { if (searchFragment == null) { searchFragment = new SearchFragment(); } currentFragment = searchFragment; FragmentManager fragmentManager = getFragmentManager(); fragmentManager.beginTransaction().replace(R.id.content_frame, searchFragment).commit(); } else if (position == 1 && !(currentFragment instanceof ConversationsListFragment)) { ConversationsListFragment conversationsFragment = new ConversationsListFragment(); currentFragment = conversationsFragment; FragmentManager fragmentManager = getFragmentManager(); fragmentManager.beginTransaction().replace(R.id.content_frame, conversationsFragment).commit(); } else if (position == 2 && !(currentFragment instanceof FriendsListFragment)) { FriendsListFragment friendsFragment = new FriendsListFragment(); currentFragment = friendsFragment; FragmentManager fragmentManager = getFragmentManager(); fragmentManager.beginTransaction().replace(R.id.content_frame, friendsFragment).commit(); } else if (position == 3 && !(currentFragment instanceof FriendRequestsFragment)) { FriendRequestsFragment friendRequestFragment = new FriendRequestsFragment(); currentFragment = friendRequestFragment; FragmentManager fragmentManager = getFragmentManager(); fragmentManager.beginTransaction().replace(R.id.content_frame, friendRequestFragment).commit(); } else if (position == 4 && !(currentFragment instanceof BlackListFragment)) { BlackListFragment blackListFragment = new BlackListFragment(); currentFragment = blackListFragment; FragmentManager fragmentManager = getFragmentManager(); fragmentManager.beginTransaction().replace(R.id.content_frame, blackListFragment).commit(); } else if (position == 5 && !(currentFragment instanceof FavoritePlacesFragment)) { FavoritePlacesFragment favoritePlacesFragment = new FavoritePlacesFragment(); currentFragment = favoritePlacesFragment; FragmentManager fragmentManager = getFragmentManager(); fragmentManager.beginTransaction().replace(R.id.content_frame, favoritePlacesFragment).commit(); } else if (position == 6 && !(currentFragment instanceof MyProfileFragment)) { MyProfileFragment profileFragment = new MyProfileFragment(); currentFragment = profileFragment; FragmentManager fragmentManager = getFragmentManager(); fragmentManager.beginTransaction().replace(R.id.content_frame, profileFragment).commit(); } else if (position == 7 && !(currentFragment instanceof SettingsFragment)) { SettingsFragment settingsFragment = new SettingsFragment(); currentFragment = settingsFragment; FragmentManager fragmentManager = getFragmentManager(); fragmentManager.beginTransaction().replace(R.id.content_frame, settingsFragment).commit(); } else if (position == 8) { //return to loginFragment this.askLogOut(this); } else if (position == 9) { askExit(); } mDrawerList.setItemChecked(position, true); mDrawerLayout.closeDrawer(mDrawerList); } @Override public void setTitle(CharSequence title) { mTitle = title; getActionBar().setTitle(mTitle); } /** * When using the ActionBarDrawerToggle, you must call it during * onPostCreate() and onConfigurationChanged()... */ @Override public void onBackPressed() { if (currentFragment instanceof ChatFragment) { if (((ChatFragment) currentFragment).getPopupWindow().isShowing()) { ((ChatFragment) currentFragment).getPopupWindow().dismiss(); FrameLayout.LayoutParams baseChatLayoutParams = new FrameLayout.LayoutParams( android.view.ViewGroup.LayoutParams.MATCH_PARENT, android.view.ViewGroup.LayoutParams.MATCH_PARENT); RelativeLayout baseChatLayout = (RelativeLayout) findViewById(R.id.base_chat_layout2); baseChatLayout.setLayoutParams(baseChatLayoutParams); } else { this.selectItem(1); } } else if (currentFragment instanceof FriendProfileFragment) { this.selectItem(2); } else if (currentFragment instanceof ConversationsListFragment || currentFragment instanceof FriendsListFragment || currentFragment instanceof BlackListFragment || currentFragment instanceof FavoritePlacesFragment || currentFragment instanceof FriendRequestsFragment || currentFragment instanceof MyProfileFragment || currentFragment instanceof SettingsFragment || currentFragment instanceof SearchFragment) { askExit(); } else { finish(); } } public void setCurrentFragment(Fragment currentFragment) { this.currentFragment = currentFragment; } @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); } public ListView getDrawerList() { return this.mDrawerList; } public void askExit() { AlertDialog.Builder alertDialog2 = new AlertDialog.Builder(this); // Setting Dialog Title alertDialog2.setTitle("Conferma uscita"); // Setting Dialog Message alertDialog2.setMessage("Sei sicuro di voler uscire dall'applicazione?"); // Setting Positive "Yes" Btn alertDialog2.setPositiveButton("SI", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // Write your code here to execute after dialog //preferencesEditor.remove("loggedUser"); //preferencesEditor.commit(); finish(); } }); // Setting Negative "NO" Btn alertDialog2.setNegativeButton("NO", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // Write your code here to execute after dialog dialog.cancel(); } }); alertDialog2.show(); } public void askLogOut(Activity gg) { AlertDialog.Builder alertDialog2 = new AlertDialog.Builder(this); final Activity gg1 = gg; String PREFS_NAME = "MeetPreferFile"; storedInfo = this.getSharedPreferences(PREFS_NAME, 0); preferencesEditor = storedInfo.edit(); // Setting Dialog Title alertDialog2.setTitle("Conferma Cambio Utente"); // Setting Dialog Message alertDialog2.setMessage("Sei sicuro di voler disconnettere " + storedInfo.getString("loggedUser", "")); // Setting Positive "Yes" Btn alertDialog2.setPositiveButton("SI", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // Write your code here to execute after dialog preferencesEditor.remove("loggedUser"); preferencesEditor.commit(); //bisogna eseguire questo codice per spostarsi sulla LoginActivity gg1.startActivity(new Intent(gg1, LoginActivity.class)); //this.finish(); finish(); } }); // Setting Negative "NO" Btn alertDialog2.setNegativeButton("NO", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // Write your code here to execute after dialog dialog.cancel(); } }); alertDialog2.show(); } }