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任何人都可以帮助我如何把时间戳和如何将消息详细信息列表视图中的数据库？就像在手机上一样，显示联系人的姓名，时间和他的消息的一部分。这里是我的数据库的代码：Android：时间戳
public class MessagesDBAdapter {
public static final String KEY_RECIPIENT = "recipient";
public static final String KEY_MESSAGE = "message";
public static final String KEY_ROWID = "_id";
private static final String TAG = "MessagesDBAdapter";
private DatabaseHelper mDbHelper;
private SQLiteDatabase mDb;
//Database creation sql statement
private static final String DATABASE_CREATE =
"create table notes (_id integer primary key autoincrement, "
+ "title text not null, body text not null);";
private static final String DATABASE_NAME = "data";
private static final String DATABASE_TABLE = "notes";
private static final int DATABASE_VERSION = 2;
private final Context mCtx;
private static class DatabaseHelper extends SQLiteOpenHelper {
DatabaseHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL(DATABASE_CREATE);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
Log.w(TAG, "Upgrading database from version " + oldVersion + " to "
+ newVersion + ", which will destroy all old data");
db.execSQL("DROP TABLE IF EXISTS notes");
onCreate(db);
}
}
/**
* Constructor - takes the context to allow the database to be
* opened/created
*
* @param ctx the Context within which to work
*/
public MessagesDBAdapter(Context ctx) {
this.mCtx = ctx;
}
public MessagesDBAdapter open() throws SQLException {
mDbHelper = new DatabaseHelper(mCtx);
mDb = mDbHelper.getWritableDatabase();
return this;
}
public void close() {
mDbHelper.close();
}
public long createNote(String phoneNo, String message) {
ContentValues initialValues = new ContentValues();
initialValues.put(KEY_RECIPIENT, phoneNo);
initialValues.put(KEY_MESSAGE, message);
open();
return mDb.insert(DATABASE_TABLE, null, initialValues);
}
public boolean deleteNote(long rowId) {
return mDb.delete(DATABASE_TABLE, KEY_ROWID + "=" + rowId, null) > 0;
}
public Cursor fetchAllNotes() {
return mDb.query(DATABASE_TABLE, new String[] {KEY_ROWID, KEY_RECIPIENT,
KEY_MESSAGE}, null, null, null, null, null);
}
public Cursor fetchNote(long rowId) throws SQLException {
Cursor mCursor =
mDb.query(true, DATABASE_TABLE, new String[] {KEY_ROWID,
KEY_RECIPIENT, KEY_MESSAGE}, KEY_ROWID + "=" + rowId, null,
null, null, null, null);
if (mCursor != null) {
mCursor.moveToFirst();
}
return mCursor;
}
public boolean updateNote(long rowId, String phoneNo, String message) {
ContentValues args = new ContentValues();
args.put(KEY_RECIPIENT, phoneNo);
args.put(KEY_MESSAGE, message);
return mDb.update(DATABASE_TABLE, args, KEY_ROWID + "=" + rowId, null) > 0;
}
}