src/com/android/cellbroadcastreceiver/CellBroadcastListActivity.java - platform/packages/apps/CellBroadcastReceiver - Git at Google

 /*
  * Copyright (C) 2011 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.android.cellbroadcastreceiver;

 import android.app.Activity;
 import android.app.AlertDialog;
 import android.app.FragmentManager;
 import android.app.ListFragment;
 import android.app.LoaderManager;
 import android.app.NotificationManager;
 import android.content.Context;
 import android.content.CursorLoader;
 import android.content.DialogInterface;
 import android.content.DialogInterface.OnClickListener;
 import android.content.Intent;
 import android.content.Loader;
 import android.database.Cursor;
 import android.os.Bundle;
 import android.provider.Telephony;
 import android.telephony.CellBroadcastMessage;
 import android.view.ContextMenu;
 import android.view.ContextMenu.ContextMenuInfo;
 import android.view.LayoutInflater;
 import android.view.Menu;
 import android.view.MenuInflater;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.View.OnCreateContextMenuListener;
 import android.view.ViewGroup;
 import android.widget.CursorAdapter;
 import android.widget.ListView;

 import java.util.ArrayList;

 /**
  * This activity provides a list view of received cell broadcasts. Most of the work is handled
  * in the inner CursorLoaderListFragment class.
  */
 public class CellBroadcastListActivity extends Activity {

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);

         // Dismiss the notification that brought us here (if any).
         ((NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE))
                 .cancel(CellBroadcastAlertService.NOTIFICATION_ID);

         FragmentManager fm = getFragmentManager();

         // Create the list fragment and add it as our sole content.
         if (fm.findFragmentById(android.R.id.content) == null) {
             CursorLoaderListFragment listFragment = new CursorLoaderListFragment();
             fm.beginTransaction().add(android.R.id.content, listFragment).commit();
         }
     }

     /**
      * List fragment queries SQLite database on worker thread.
      */
     public static class CursorLoaderListFragment extends ListFragment
             implements LoaderManager.LoaderCallbacks<Cursor> {

         // IDs of the main menu items.
         private static final int MENU_DELETE_ALL           = 3;
         private static final int MENU_PREFERENCES          = 4;

         // IDs of the context menu items (package local, accessed from inner DeleteThreadListener).
         static final int MENU_DELETE               = 0;
         static final int MENU_VIEW_DETAILS         = 1;

         // This is the Adapter being used to display the list's data.
         CursorAdapter mAdapter;

         @Override
         public void onCreate(Bundle savedInstanceState) {
             super.onCreate(savedInstanceState);

             // We have a menu item to show in action bar.
             setHasOptionsMenu(true);
         }

         @Override
         public View onCreateView(LayoutInflater inflater, ViewGroup container,
                 Bundle savedInstanceState) {
             return inflater.inflate(R.layout.cell_broadcast_list_screen, container, false);
         }

         @Override
         public void onActivityCreated(Bundle savedInstanceState) {
             super.onActivityCreated(savedInstanceState);

             // Set context menu for long-press.
             ListView listView = getListView();
             listView.setOnCreateContextMenuListener(mOnCreateContextMenuListener);

             // Create a cursor adapter to display the loaded data.
             mAdapter = new CellBroadcastCursorAdapter(getActivity(), null);
             setListAdapter(mAdapter);

             // Prepare the loader.  Either re-connect with an existing one,
             // or start a new one.
             getLoaderManager().initLoader(0, null, this);
         }

         @Override
         public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
             menu.add(0, MENU_DELETE_ALL, 0, R.string.menu_delete_all).setIcon(
                     android.R.drawable.ic_menu_delete);
             menu.add(0, MENU_PREFERENCES, 0, R.string.menu_preferences).setIcon(
                     android.R.drawable.ic_menu_preferences);
         }

         @Override
         public void onPrepareOptionsMenu(Menu menu) {
             menu.findItem(MENU_DELETE_ALL).setVisible(!mAdapter.isEmpty());
         }

         @Override
         public void onListItemClick(ListView l, View v, int position, long id) {
             CellBroadcastListItem cbli = (CellBroadcastListItem) v;
             showDialogAndMarkRead(cbli.getMessage());
         }

         @Override
         public Loader<Cursor> onCreateLoader(int id, Bundle args) {
             return new CursorLoader(getActivity(), CellBroadcastContentProvider.CONTENT_URI,
                     Telephony.CellBroadcasts.QUERY_COLUMNS, null, null,
                     Telephony.CellBroadcasts.DELIVERY_TIME + " DESC");
         }

         @Override
         public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
             // Swap the new cursor in.  (The framework will take care of closing the
             // old cursor once we return.)
             mAdapter.swapCursor(data);
             getActivity().invalidateOptionsMenu();
         }

         @Override
         public void onLoaderReset(Loader<Cursor> loader) {
             // This is called when the last Cursor provided to onLoadFinished()
             // above is about to be closed.  We need to make sure we are no
             // longer using it.
             mAdapter.swapCursor(null);
         }

         private void showDialogAndMarkRead(CellBroadcastMessage cbm) {
             // show emergency alerts with the warning icon, but don't play alert tone
             Intent i = new Intent(getActivity(), CellBroadcastAlertDialog.class);
             ArrayList<CellBroadcastMessage> messageList = new ArrayList<CellBroadcastMessage>(1);
             messageList.add(cbm);
             i.putParcelableArrayListExtra(CellBroadcastMessage.SMS_CB_MESSAGE_EXTRA, messageList);
             startActivity(i);
         }

         private void showBroadcastDetails(CellBroadcastMessage cbm) {
             // show dialog with delivery date/time and alert details
             CharSequence details = CellBroadcastResources.getMessageDetails(getActivity(), cbm);
             new AlertDialog.Builder(getActivity())
                     .setTitle(R.string.view_details_title)
                     .setMessage(details)
                     .setCancelable(true)
                     .show();
         }

         private final OnCreateContextMenuListener mOnCreateContextMenuListener =
                 new OnCreateContextMenuListener() {
                     @Override
                     public void onCreateContextMenu(ContextMenu menu, View v,
                             ContextMenuInfo menuInfo) {
                         menu.setHeaderTitle(R.string.message_options);
                         menu.add(0, MENU_VIEW_DETAILS, 0, R.string.menu_view_details);
                         menu.add(0, MENU_DELETE, 0, R.string.menu_delete);
                     }
                 };

         @Override
         public boolean onContextItemSelected(MenuItem item) {
             Cursor cursor = mAdapter.getCursor();
             if (cursor != null && cursor.getPosition() >= 0) {
                 switch (item.getItemId()) {
                     case MENU_DELETE:
                         confirmDeleteThread(cursor.getLong(cursor.getColumnIndexOrThrow(
                                 Telephony.CellBroadcasts._ID)));
                         break;

                     case MENU_VIEW_DETAILS:
                         showBroadcastDetails(CellBroadcastMessage.createFromCursor(cursor));
                         break;

                     default:
                         break;
                 }
             }
             return super.onContextItemSelected(item);
         }

         @Override
         public boolean onOptionsItemSelected(MenuItem item) {
             switch(item.getItemId()) {
                 case MENU_DELETE_ALL:
                     confirmDeleteThread(-1);
                     break;

                 case MENU_PREFERENCES:
                     Intent intent = new Intent(getActivity(), CellBroadcastSettings.class);
                     startActivity(intent);
                     break;

                 default:
                     return true;
             }
             return false;
         }

         /**
          * Start the process of putting up a dialog to confirm deleting a broadcast.
          * @param rowId the row ID of the broadcast to delete, or -1 to delete all broadcasts
          */
         public void confirmDeleteThread(long rowId) {
             DeleteThreadListener listener = new DeleteThreadListener(rowId);
             confirmDeleteThreadDialog(listener, (rowId == -1), getActivity());
         }

         /**
          * Build and show the proper delete broadcast dialog. The UI is slightly different
          * depending on whether there are locked messages in the thread(s) and whether we're
          * deleting a single broadcast or all broadcasts.
          * @param listener gets called when the delete button is pressed
          * @param deleteAll whether to show a single thread or all threads UI
          * @param context used to load the various UI elements
          */
         public static void confirmDeleteThreadDialog(DeleteThreadListener listener,
                 boolean deleteAll, Context context) {
             AlertDialog.Builder builder = new AlertDialog.Builder(context);
             builder.setIconAttribute(android.R.attr.alertDialogIcon)
                     .setCancelable(true)
                     .setPositiveButton(R.string.button_delete, listener)
                     .setNegativeButton(R.string.button_cancel, null)
                     .setMessage(deleteAll ? R.string.confirm_delete_all_broadcasts
                             : R.string.confirm_delete_broadcast)
                     .show();
         }

         public class DeleteThreadListener implements OnClickListener {
             private final long mRowId;

             public DeleteThreadListener(long rowId) {
                 mRowId = rowId;
             }

             @Override
             public void onClick(DialogInterface dialog, int whichButton) {
                 // delete from database on a background thread
                 new CellBroadcastContentProvider.AsyncCellBroadcastTask(
                         getActivity().getContentResolver()).execute(
                         new CellBroadcastContentProvider.CellBroadcastOperation() {
                             @Override
                             public boolean execute(CellBroadcastContentProvider provider) {
                                 if (mRowId != -1) {
                                     return provider.deleteBroadcast(mRowId);
                                 } else {
                                     return provider.deleteAllBroadcasts();
                                 }
                             }
                         });

                 dialog.dismiss();
             }
         }
     }
 }
	/*
	* Copyright (C) 2011 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.android.cellbroadcastreceiver;

	import android.app.Activity;
	import android.app.AlertDialog;
	import android.app.FragmentManager;
	import android.app.ListFragment;
	import android.app.LoaderManager;
	import android.app.NotificationManager;
	import android.content.Context;
	import android.content.CursorLoader;
	import android.content.DialogInterface;
	import android.content.DialogInterface.OnClickListener;
	import android.content.Intent;
	import android.content.Loader;
	import android.database.Cursor;
	import android.os.Bundle;
	import android.provider.Telephony;
	import android.telephony.CellBroadcastMessage;
	import android.view.ContextMenu;
	import android.view.ContextMenu.ContextMenuInfo;
	import android.view.LayoutInflater;
	import android.view.Menu;
	import android.view.MenuInflater;
	import android.view.MenuItem;
	import android.view.View;
	import android.view.View.OnCreateContextMenuListener;
	import android.view.ViewGroup;
	import android.widget.CursorAdapter;
	import android.widget.ListView;

	import java.util.ArrayList;

	/**
	* This activity provides a list view of received cell broadcasts. Most of the work is handled
	* in the inner CursorLoaderListFragment class.
	*/
	public class CellBroadcastListActivity extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
	super.onCreate(savedInstanceState);

	// Dismiss the notification that brought us here (if any).
	((NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE))
	.cancel(CellBroadcastAlertService.NOTIFICATION_ID);

	FragmentManager fm = getFragmentManager();

	// Create the list fragment and add it as our sole content.
	if (fm.findFragmentById(android.R.id.content) == null) {
	CursorLoaderListFragment listFragment = new CursorLoaderListFragment();
	fm.beginTransaction().add(android.R.id.content, listFragment).commit();
	}
	}

	/**
	* List fragment queries SQLite database on worker thread.
	*/
	public static class CursorLoaderListFragment extends ListFragment
	implements LoaderManager.LoaderCallbacks<Cursor> {

	// IDs of the main menu items.
	private static final int MENU_DELETE_ALL = 3;
	private static final int MENU_PREFERENCES = 4;

	// IDs of the context menu items (package local, accessed from inner DeleteThreadListener).
	static final int MENU_DELETE = 0;
	static final int MENU_VIEW_DETAILS = 1;

	// This is the Adapter being used to display the list's data.
	CursorAdapter mAdapter;

	@Override
	public void onCreate(Bundle savedInstanceState) {
	super.onCreate(savedInstanceState);

	// We have a menu item to show in action bar.
	setHasOptionsMenu(true);
	}

	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
	Bundle savedInstanceState) {
	return inflater.inflate(R.layout.cell_broadcast_list_screen, container, false);
	}

	@Override
	public void onActivityCreated(Bundle savedInstanceState) {
	super.onActivityCreated(savedInstanceState);

	// Set context menu for long-press.
	ListView listView = getListView();
	listView.setOnCreateContextMenuListener(mOnCreateContextMenuListener);

	// Create a cursor adapter to display the loaded data.
	mAdapter = new CellBroadcastCursorAdapter(getActivity(), null);
	setListAdapter(mAdapter);

	// Prepare the loader. Either re-connect with an existing one,
	// or start a new one.
	getLoaderManager().initLoader(0, null, this);
	}

	@Override
	public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
	menu.add(0, MENU_DELETE_ALL, 0, R.string.menu_delete_all).setIcon(
	android.R.drawable.ic_menu_delete);
	menu.add(0, MENU_PREFERENCES, 0, R.string.menu_preferences).setIcon(
	android.R.drawable.ic_menu_preferences);
	}

	@Override
	public void onPrepareOptionsMenu(Menu menu) {
	menu.findItem(MENU_DELETE_ALL).setVisible(!mAdapter.isEmpty());
	}

	@Override
	public void onListItemClick(ListView l, View v, int position, long id) {
	CellBroadcastListItem cbli = (CellBroadcastListItem) v;
	showDialogAndMarkRead(cbli.getMessage());
	}

	@Override
	public Loader<Cursor> onCreateLoader(int id, Bundle args) {
	return new CursorLoader(getActivity(), CellBroadcastContentProvider.CONTENT_URI,
	Telephony.CellBroadcasts.QUERY_COLUMNS, null, null,
	Telephony.CellBroadcasts.DELIVERY_TIME + " DESC");
	}

	@Override
	public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
	// Swap the new cursor in. (The framework will take care of closing the
	// old cursor once we return.)
	mAdapter.swapCursor(data);
	getActivity().invalidateOptionsMenu();
	}

	@Override
	public void onLoaderReset(Loader<Cursor> loader) {
	// This is called when the last Cursor provided to onLoadFinished()
	// above is about to be closed. We need to make sure we are no
	// longer using it.
	mAdapter.swapCursor(null);
	}

	private void showDialogAndMarkRead(CellBroadcastMessage cbm) {
	// show emergency alerts with the warning icon, but don't play alert tone
	Intent i = new Intent(getActivity(), CellBroadcastAlertDialog.class);
	ArrayList<CellBroadcastMessage> messageList = new ArrayList<CellBroadcastMessage>(1);
	messageList.add(cbm);
	i.putParcelableArrayListExtra(CellBroadcastMessage.SMS_CB_MESSAGE_EXTRA, messageList);
	startActivity(i);
	}

	private void showBroadcastDetails(CellBroadcastMessage cbm) {
	// show dialog with delivery date/time and alert details
	CharSequence details = CellBroadcastResources.getMessageDetails(getActivity(), cbm);
	new AlertDialog.Builder(getActivity())
	.setTitle(R.string.view_details_title)
	.setMessage(details)
	.setCancelable(true)
	.show();
	}

	private final OnCreateContextMenuListener mOnCreateContextMenuListener =
	new OnCreateContextMenuListener() {
	@Override
	public void onCreateContextMenu(ContextMenu menu, View v,
	ContextMenuInfo menuInfo) {
	menu.setHeaderTitle(R.string.message_options);
	menu.add(0, MENU_VIEW_DETAILS, 0, R.string.menu_view_details);
	menu.add(0, MENU_DELETE, 0, R.string.menu_delete);
	}
	};

	@Override
	public boolean onContextItemSelected(MenuItem item) {
	Cursor cursor = mAdapter.getCursor();
	if (cursor != null && cursor.getPosition() >= 0) {
	switch (item.getItemId()) {
	case MENU_DELETE:
	confirmDeleteThread(cursor.getLong(cursor.getColumnIndexOrThrow(
	Telephony.CellBroadcasts._ID)));
	break;

	case MENU_VIEW_DETAILS:
	showBroadcastDetails(CellBroadcastMessage.createFromCursor(cursor));
	break;

	default:
	break;
	}
	}
	return super.onContextItemSelected(item);
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
	switch(item.getItemId()) {
	case MENU_DELETE_ALL:
	confirmDeleteThread(-1);
	break;

	case MENU_PREFERENCES:
	Intent intent = new Intent(getActivity(), CellBroadcastSettings.class);
	startActivity(intent);
	break;

	default:
	return true;
	}
	return false;
	}

	/**
	* Start the process of putting up a dialog to confirm deleting a broadcast.
	* @param rowId the row ID of the broadcast to delete, or -1 to delete all broadcasts
	*/
	public void confirmDeleteThread(long rowId) {
	DeleteThreadListener listener = new DeleteThreadListener(rowId);
	confirmDeleteThreadDialog(listener, (rowId == -1), getActivity());
	}

	/**
	* Build and show the proper delete broadcast dialog. The UI is slightly different
	* depending on whether there are locked messages in the thread(s) and whether we're
	* deleting a single broadcast or all broadcasts.
	* @param listener gets called when the delete button is pressed
	* @param deleteAll whether to show a single thread or all threads UI
	* @param context used to load the various UI elements
	*/
	public static void confirmDeleteThreadDialog(DeleteThreadListener listener,
	boolean deleteAll, Context context) {
	AlertDialog.Builder builder = new AlertDialog.Builder(context);
	builder.setIconAttribute(android.R.attr.alertDialogIcon)
	.setCancelable(true)
	.setPositiveButton(R.string.button_delete, listener)
	.setNegativeButton(R.string.button_cancel, null)
	.setMessage(deleteAll ? R.string.confirm_delete_all_broadcasts
	: R.string.confirm_delete_broadcast)
	.show();
	}

	public class DeleteThreadListener implements OnClickListener {
	private final long mRowId;

	public DeleteThreadListener(long rowId) {
	mRowId = rowId;
	}

	@Override
	public void onClick(DialogInterface dialog, int whichButton) {
	// delete from database on a background thread
	new CellBroadcastContentProvider.AsyncCellBroadcastTask(
	getActivity().getContentResolver()).execute(
	new CellBroadcastContentProvider.CellBroadcastOperation() {
	@Override
	public boolean execute(CellBroadcastContentProvider provider) {
	if (mRowId != -1) {
	return provider.deleteBroadcast(mRowId);
	} else {
	return provider.deleteAllBroadcasts();
	}
	}
	});

	dialog.dismiss();
	}
	}
	}
	}