Events.java
上传用户:xmjingguan
上传日期:2009-07-06
资源大小:2054k
文件大小:2k
- /***
- * Excerpted from "Hello, Android!",
- * published by The Pragmatic Bookshelf.
- * Copyrights apply to this code. It may not be used to create training material,
- * courses, books, articles, and the like. Contact us if you are in doubt.
- * We make no guarantees that this code is fit for any purpose.
- * Visit http://www.pragmaticprogrammer.com/titles/eband for more book information.
- ***/
- package org.example.events;
- import static android.provider.BaseColumns._ID;
- import static org.example.events.Constants.TABLE_NAME;
- import static org.example.events.Constants.TIME;
- import static org.example.events.Constants.TITLE;
- import android.app.ListActivity;
- // ...
- import android.content.ContentValues;
- import android.database.Cursor;
- import android.database.sqlite.SQLiteDatabase;
- import android.os.Bundle;
- import android.widget.SimpleCursorAdapter;
- // ...
- public class Events extends ListActivity {
- // ...
-
- private static String[] FROM = { _ID, TIME, TITLE, };
- private static String ORDER_BY = TIME + " DESC";
-
- private static int[] TO = { R.id.rowid, R.id.time, R.id.title, };
-
- private EventsData events;
- @Override
- public void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.main);
- events = new EventsData(this);
- try {
- addEvent("Hello, Android!");
- Cursor cursor = getEvents();
- showEvents(cursor);
- } finally {
- events.close();
- }
- }
- private void addEvent(String string) {
- // Insert a new record into the Events data source.
- // You would do something similar for delete and update.
- SQLiteDatabase db = events.getWritableDatabase();
- ContentValues values = new ContentValues();
- values.put(TIME, System.currentTimeMillis());
- values.put(TITLE, string);
- db.insertOrThrow(TABLE_NAME, null, values);
- }
- private Cursor getEvents() {
- // Perform a managed query. The Activity will handle closing
- // and re-querying the cursor when needed.
- SQLiteDatabase db = events.getReadableDatabase();
- Cursor cursor = db.query(TABLE_NAME, FROM, null, null, null,
- null, ORDER_BY);
- startManagingCursor(cursor);
- return cursor;
- }
-
- private void showEvents(Cursor cursor) {
- // Set up data binding
- SimpleCursorAdapter adapter = new SimpleCursorAdapter(this,
- R.layout.item, cursor, FROM, TO);
- setListAdapter(adapter);
- }
-
-
- }