这是代码：
TodoTable.java：
public class TodoTable {
// Database table
public static final String TABLE_TODO = "todo";
public static final String COLUMN_ID_U = "_id";
public static final String COLUMN_CATEGORY = "category";
public static final String COLUMN_SUMMARY = "summary";
public static final String COLUMN_DESCRIPTION = "description";
public static final String COLUMN_SATZE = "satze";
// Database creation SQL statement
private static final String DATABASE_CREATE = "create table "
+ TABLE_TODO
+ "("
+ COLUMN_ID_U + " integer primary key autoincrement, "
+ COLUMN_CATEGORY + " text not null, "
+ COLUMN_SUMMARY + " text not null, "
+ COLUMN_DESCRIPTION + " text not null, "
+ COLUMN_SATZE + " text not null"
+ ");";
public static void onCreate(SQLiteDatabase database) {
database.execSQL(DATABASE_CREATE);
}
public static void onUpgrade(SQLiteDatabase database, int oldVersion,
int newVersion) {
Log.w(TodoTable.class.getName(), "Upgrading database from version "
+ oldVersion + " to " + newVersion
+ ", which will destroy all old data");
database.execSQL("DROP TABLE IF EXISTS " + TABLE_TODO);
onCreate(database);
}}
TodoDetailAktivity.java：
public class TodoDetailActivity extends Activity {
private Spinner mCategory;
private EditText mTitleText;
private EditText mBodyText;
private EditText mSatzText;
private EditText mPauseText;
private EditText mWDHText;
private EditText mGewichtText;
private Uri todoUri;
@Override
protected void onCreate(Bundle bundle) {
super.onCreate(bundle);
setContentView(R.layout.todo_edit);
mCategory = (Spinner) findViewById(R.id.category);
mTitleText = (EditText) findViewById(R.id.todo_edit_summary);
mBodyText = (EditText) findViewById(R.id.todo_edit_description);
mSatzText = (EditText) findViewById(R.id.editTextsatz);
Button confirmButton = (Button) findViewById(R.id.todo_edit_button);
Bundle extras = getIntent().getExtras();
// Check from the saved Instance
todoUri = (bundle == null) ? null : (Uri) bundle
.getParcelable(MyTodoContentProvider.CONTENT_ITEM_TYPE);
// Or passed from the other activity
if (extras != null) {
todoUri = extras
.getParcelable(MyTodoContentProvider.CONTENT_ITEM_TYPE);
fillData(todoUri);
}
confirmButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
if (TextUtils.isEmpty(mTitleText.getText().toString())) {
makeToast();
} else {
setResult(RESULT_OK);
finish();
}
}
});
}
private void fillData(Uri uri) {
String[] projection = { TodoTable.COLUMN_SUMMARY,
TodoTable.COLUMN_DESCRIPTION, TodoTable.COLUMN_CATEGORY };
Cursor cursor = getContentResolver().query(uri, projection, null, null,
null);
if (cursor != null) {
cursor.moveToFirst();
String category = cursor.getString(cursor
.getColumnIndexOrThrow(TodoTable.COLUMN_CATEGORY));
for (int i = 0; i < mCategory.getCount(); i++) {
String s = (String) mCategory.getItemAtPosition(i);
if (s.equalsIgnoreCase(category)) {
mCategory.setSelection(i);
}
}
mTitleText.setText(cursor.getString(cursor
.getColumnIndexOrThrow(TodoTable.COLUMN_SUMMARY)));
mBodyText.setText(cursor.getString(cursor
.getColumnIndexOrThrow(TodoTable.COLUMN_DESCRIPTION)));
mSatzText.setText(cursor.getString(cursor
.getColumnIndexOrThrow(TodoTable.COLUMN_SATZE)));
// Always close the cursor
cursor.close();
}
}
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
saveState();
outState.putParcelable(MyTodoContentProvider.CONTENT_ITEM_TYPE, todoUri);
}
@Override
protected void onPause() {
super.onPause();
saveState();
}
private void saveState() {
String category = (String) mCategory.getSelectedItem();
String summary = mTitleText.getText().toString();
String description = mBodyText.getText().toString();
String satze = mSatzText.getText().toString();
// Only save if either summary or description
// is available
if (description.length() == 0 && summary.length() == 0 && satze.length() == 0) {
return;
}
ContentValues values = new ContentValues();
values.put(TodoTable.COLUMN_CATEGORY, category);
values.put(TodoTable.COLUMN_SUMMARY, summary);
values.put(TodoTable.COLUMN_DESCRIPTION, description);
values.put(TodoTable.COLUMN_SATZE, satze);
if (todoUri == null) {
// New todo
todoUri = getContentResolver().insert(MyTodoContentProvider.CONTENT_URI, values);
} else {
// Update todo
getContentResolver().update(todoUri, values, null, null);
}
}
private void makeToast() {
Toast.makeText(TodoDetailActivity.this, "Please maintain a summary",
Toast.LENGTH_LONG).show();
}}
TodosOverviewAktivity.java：
/*
* TodosOverviewActivity displays the existing todo items
* in a list
*
* You can create new ones via the ActionBar entry "Insert"
* You can delete existing ones via a long press on the item
*/
@TargetApi(11)
public class TodosOverviewActivity extends ListActivity implements
LoaderManager.LoaderCallbacks<Cursor> {
private static final int ACTIVITY_CREATE = 0;
private static final int ACTIVITY_EDIT = 1;
private static final int DELETE_ID = Menu.FIRST + 1;
// private Cursor cursor;
private SimpleCursorAdapter adapter;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.todo_list);
this.getListView().setDividerHeight(1);
fillData();
registerForContextMenu(getListView());
}
// Create the menu based on the XML defintion
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.listmenu, menu);
return true;
}
// Reaction to the menu selection
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.insert:
createTodo();
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
public boolean onContextItemSelected(MenuItem item) {
switch (item.getItemId()) {
case DELETE_ID:
AdapterContextMenuInfo info = (AdapterContextMenuInfo) item
.getMenuInfo();
Uri uri = Uri.parse(MyTodoContentProvider.CONTENT_URI + "/"
+ info.id);
getContentResolver().delete(uri, null, null);
fillData();
return true;
}
return super.onContextItemSelected(item);
}
private void createTodo() {
Intent i = new Intent(this, TodoDetailActivity.class);
startActivityForResult(i, ACTIVITY_CREATE);
}
// Opens the second activity if an entry is clicked
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
super.onListItemClick(l, v, position, id);
Intent i = new Intent(this, TodoDetailActivity.class);
Uri todoUri = Uri.parse(MyTodoContentProvider.CONTENT_URI + "/" + id);
i.putExtra(MyTodoContentProvider.CONTENT_ITEM_TYPE, todoUri);
// Activity returns an result if called with startActivityForResult
startActivityForResult(i, ACTIVITY_EDIT);
}
// Called with the result of the other activity
// requestCode was the origin request code send to the activity
// resultCode is the return code, 0 is everything is ok
// intend can be used to get data
@Override
protected void onActivityResult(int requestCode, int resultCode,
Intent intent) {
super.onActivityResult(requestCode, resultCode, intent);
}
private void fillData() {
// Fields from the database (projection)
// Must include the _id column for the adapter to work
String[] from = new String[] { TodoTable.COLUMN_SUMMARY };
// Fields on the UI to which we map
int[] to = new int[] { R.id.label };
getLoaderManager().initLoader(0, null, this);
adapter = new SimpleCursorAdapter(this, R.layout.todo_row, null, from,
to, 0);
setListAdapter(adapter);
}
@Override
public void onCreateContextMenu(ContextMenu menu, View v,
ContextMenuInfo menuInfo) {
super.onCreateContextMenu(menu, v, menuInfo);
menu.add(0, DELETE_ID, 0, R.string.menu_delete);
}
// Creates a new loader after the initLoader () call
@Override
public Loader<Cursor> onCreateLoader(int id, Bundle args) {
String[] projection = { TodoTable.COLUMN_ID_U, TodoTable.COLUMN_SUMMARY };
CursorLoader cursorLoader = new CursorLoader(this,
MyTodoContentProvider.CONTENT_URI, projection, null, null, null);
return cursorLoader;
}
@Override
public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
adapter.swapCursor(data);
}
@Override
public void onLoaderReset(Loader<Cursor> loader) {
// data is not available anymore, delete reference
adapter.swapCursor(null);
}}
MyTodoContentProvider.java：
public class MyTodoContentProvider extends ContentProvider {
// database
private TodoDatabaseHelper database;
// Used for the UriMacher
private static final int TODOS = 10;
private static final int TODO_ID = 20;
private static final String AUTHORITY = "de.vogella.android.todos.contentprovider";
private static final String BASE_PATH = "todos";
public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY
+ "/" + BASE_PATH);
public static final String CONTENT_TYPE = ContentResolver.CURSOR_DIR_BASE_TYPE
+ "/todos";
public static final String CONTENT_ITEM_TYPE = ContentResolver.CURSOR_ITEM_BASE_TYPE
+ "/todo";
private static final UriMatcher sURIMatcher = new UriMatcher(UriMatcher.NO_MATCH);
static {
sURIMatcher.addURI(AUTHORITY, BASE_PATH, TODOS);
sURIMatcher.addURI(AUTHORITY, BASE_PATH + "/#", TODO_ID);
}
@Override
public boolean onCreate() {
database = new TodoDatabaseHelper(getContext());
return false;
}
@Override
public Cursor query(Uri uri, String[] projection, String selection,
String[] selectionArgs, String sortOrder) {
// Uisng SQLiteQueryBuilder instead of query() method
SQLiteQueryBuilder queryBuilder = new SQLiteQueryBuilder();
// Check if the caller has requested a column which does not exists
checkColumns(projection);
// Set the table
queryBuilder.setTables(TodoTable.TABLE_TODO);
int uriType = sURIMatcher.match(uri);
switch (uriType) {
case TODOS:
break;
case TODO_ID:
// Adding the ID to the original query
queryBuilder.appendWhere(TodoTable.COLUMN_ID_U + "="
+ uri.getLastPathSegment());
break;
default:
throw new IllegalArgumentException("Unknown URI: " + uri);
}
SQLiteDatabase db = database.getWritableDatabase();
Cursor cursor = queryBuilder.query(db, projection, selection,
selectionArgs, null, null, sortOrder);
// Make sure that potential listeners are getting notified
cursor.setNotificationUri(getContext().getContentResolver(), uri);
return cursor;
}
@Override
public String getType(Uri uri) {
return null;
}
@Override
public Uri insert(Uri uri, ContentValues values) {
int uriType = sURIMatcher.match(uri);
SQLiteDatabase sqlDB = database.getWritableDatabase();
int rowsDeleted = 0;
long id = 0;
switch (uriType) {
case TODOS:
id = sqlDB.insert(TodoTable.TABLE_TODO, null, values);
break;
default:
throw new IllegalArgumentException("Unknown URI: " + uri);
}
getContext().getContentResolver().notifyChange(uri, null);
return Uri.parse(BASE_PATH + "/" + id);
}
@Override
public int delete(Uri uri, String selection, String[] selectionArgs) {
int uriType = sURIMatcher.match(uri);
SQLiteDatabase sqlDB = database.getWritableDatabase();
int rowsDeleted = 0;
switch (uriType) {
case TODOS:
rowsDeleted = sqlDB.delete(TodoTable.TABLE_TODO, selection,
selectionArgs);
break;
case TODO_ID:
String id = uri.getLastPathSegment();
if (TextUtils.isEmpty(selection)) {
rowsDeleted = sqlDB.delete(TodoTable.TABLE_TODO,
TodoTable.COLUMN_ID_U + "=" + id,
null);
} else {
rowsDeleted = sqlDB.delete(TodoTable.TABLE_TODO,
TodoTable.COLUMN_ID_U + "=" + id
+ " and " + selection,
selectionArgs);
}
break;
default:
throw new IllegalArgumentException("Unknown URI: " + uri);
}
getContext().getContentResolver().notifyChange(uri, null);
return rowsDeleted;
}
@Override
public int update(Uri uri, ContentValues values, String selection,
String[] selectionArgs) {
int uriType = sURIMatcher.match(uri);
SQLiteDatabase sqlDB = database.getWritableDatabase();
int rowsUpdated = 0;
switch (uriType) {
case TODOS:
rowsUpdated = sqlDB.update(TodoTable.TABLE_TODO,
values,
selection,
selectionArgs);
break;
case TODO_ID:
String id = uri.getLastPathSegment();
if (TextUtils.isEmpty(selection)) {
rowsUpdated = sqlDB.update(TodoTable.TABLE_TODO,
values,
TodoTable.COLUMN_ID_U + "=" + id,
null);
} else {
rowsUpdated = sqlDB.update(TodoTable.TABLE_TODO,
values,
TodoTable.COLUMN_ID_U + "=" + id
+ " and "
+ selection,
selectionArgs);
}
break;
default:
throw new IllegalArgumentException("Unknown URI: " + uri);
}
getContext().getContentResolver().notifyChange(uri, null);
return rowsUpdated;
}
private void checkColumns(String[] projection) {
String[] available = { TodoTable.COLUMN_CATEGORY,
TodoTable.COLUMN_SUMMARY, TodoTable.COLUMN_DESCRIPTION, TodoTable.COLUMN_SATZE, TodoTable.COLUMN_ID_U };
if (projection != null) {
HashSet<String> requestedColumns = new HashSet<String>(Arrays.asList(projection));
HashSet<String> availableColumns = new HashSet<String>(Arrays.asList(available));
// Check if all columns which are requested are available
if (!availableColumns.containsAll(requestedColumns)) {
throw new IllegalArgumentException("Unknown columns in projection");
}
}
}
}
TodoDatabaseHelper.java：
public class TodoDatabaseHelper extends SQLiteOpenHelper {
private static final String DATABASE_NAME = "todotable.db";
private static final int DATABASE_VERSION = 1;
public TodoDatabaseHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
// Method is called during creation of the database
@Override
public void onCreate(SQLiteDatabase database) {
TodoTable.onCreate(database);
}
// Method is called during an upgrade of the database,
// e.g. if you increase the database version
@Override
public void onUpgrade(SQLiteDatabase database, int oldVersion,
int newVersion) {
TodoTable.onUpgrade(database, oldVersion, newVersion);
}
}
我复制的大部分代码：http ://www.vogella.com/articles/AndroidSQLite/article.html#todo
但我收到错误消息（LogCat）：
java.lang.RuntimeException：无法启动活动 ComponentInfo{com.example.de.vogella.android.todos/com.example.de.vogella.android.todos.TodoDetailActivity}：java.lang.IllegalArgumentException：列“satze”确实不存在
任何人都可以在代码中找到错误吗？谢谢