1.jpg (85.67 KB, 下載次數: 0)
2011-9-28 22:56 上傳
只要建立一個
2.jpg (87.55 KB, 下載次數: 0)
2011-9-28 22:58 上傳
再把它刪除之後
就跑出來了
3.jpg (86.69 KB, 下載次數: 0)
2011-9-28 23:00 上傳
請問這個要怎麼解決阿
作者: tw.apk.g-robot 時間: 2011-9-29 00:07
是否能詳細說明妳的問題!? 有看沒有懂!!
作者: yuno5420 時間: 2011-9-29 11:15
就是剛開啟時下拉式選單式完全沒東西的
然後隨便建立一個資料再把它刪除 我的下拉式選單的東西就又跑出來了
我想要的是剛開啟時是不是可以把下拉式選單顯示出來
讓我可以選
作者: ploglin 時間: 2011-9-29 13:43
我覺得你的UI處理動向有點問題唷。
是不是先說說你想做的功能為何？
spinner 的東西沒出來，應該是你的adapter沒有處理好而已。
作者: frped0522 時間: 2011-10-3 01:41
可以的話建議你將程式放上來!這樣比較好幫你除錯
作者: yuno5420 時間: 2011-10-12 18:31
本帖最後由 yuno5420 於 2011-10-12 18:41 編輯
我想做一個記帳本
我是套一個記事本的範例做的
程式是要PO資料庫的程式還是別的?
因為這是專題老師要我們做的
希望大大們可以幫我解決
這是資料庫的程式碼
package student.edu.MMB;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
public class ToDoDB extends SQLiteOpenHelper
{
private final static String DATABASE_NAME = "todo_db";
private final static int DATABASE_VERSION = 1;
private final static String TABLE_NAME = "todo_table";
public final static String FIELD_id = "_id";
public final static String FIELD_TEXT = "todo_text";
public final static String FIELD_SPINNER1 = "todo_spinner1";
public final static String FIELD_SPINNER2 = "todo_spinner2";
public final static String FIELD_SPINNER3 = "todo_spinner3";
public ToDoDB(Context context)
{
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db)
{
/* 建立table */
String sql = "CREATE TABLE " + TABLE_NAME + " (" + FIELD_id
+ " INTEGER primary key autoincrement, " + " " + FIELD_TEXT + " text)" ;
db.execSQL(sql);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion)
{
String sql = "DROP TABLE IF EXISTS " + TABLE_NAME;
db.execSQL(sql);
onCreate(db);
}
public Cursor select()
{
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.query(TABLE_NAME, null, null, null, null, null, null);
return cursor;
}
public long insert(String text)
{
SQLiteDatabase db = this.getWritableDatabase();
/* 將新增的值放入ContentValues */
ContentValues cv = new ContentValues();
cv.put(FIELD_TEXT, text);
long row = db.insert(TABLE_NAME, null, cv);
return row;
}
public void delete(int id)
{
SQLiteDatabase db = this.getWritableDatabase();
String where = FIELD_id + " = ?";
String[] whereValue =
{ Integer.toString(id) };
db.delete(TABLE_NAME, where, whereValue);
}
public void update(int id, String text)
{
SQLiteDatabase db = this.getWritableDatabase();
String where = FIELD_id + " = ?";
String[] whereValue =
{ Integer.toString(id) };
/* 將修改的值放入ContentValues */
ContentValues cv = new ContentValues();
cv.put(FIELD_TEXT, text);
db.update(TABLE_NAME, cv, where, whereValue);
}
}
這是頁面的程式碼
package student.edu.MMB;
import android.app.Activity;
import android.widget.Spinner;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteCursor;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;
import android.view.ViewGroup.OnHierarchyChangeListener;
public class Change1 extends Activity
{
private ToDoDB myToDoDB;
private Cursor myCursor;
private ListView myListView;
private EditText myEditText;
private Spinner myspinner1;
private Spinner myspinner2;
private Spinner myspinner3;
private int _id;
private Bundle savedInstanceState;
protected final static int MENU_ADD = Menu.FIRST;
protected final static int MENU_EDIT = Menu.FIRST + 1;
protected final static int MENU_DELETE = Menu.FIRST + 2;
@Override
public boolean onOptionsItemSelected(MenuItem item)
{
super.onOptionsItemSelected(item); //提供選擇類別
switch (item.getItemId())
{
case MENU_ADD: //新增資料事件
this.addTodo();
break;
case MENU_EDIT: //編輯資料事件
this.editTodo();
break;
case MENU_DELETE: //刪除資料事件
this.deleteTodo();
break;
}
return true;
}
@Override
public boolean onCreateOptionsMenu(Menu menu)
{
super.onCreateOptionsMenu(menu);
/* 新增三個MENU */
menu.add(Menu.NONE, MENU_ADD, 0, R.string.strAddButton);
menu.add(Menu.NONE, MENU_EDIT, 0, R.string.strEditButton);
menu.add(Menu.NONE, MENU_DELETE, 0, R.string.strDeleteButton);
return true;
}
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.page1);
setContentView(R.layout.page1);
Button b1 = (Button) findViewById(R.id.button6);
b1.setOnClickListener(new Button.OnClickListener()
{
public void onClick(View v)
{
Intent intent = new Intent();
intent.setClass(Change1.this, MMB.class);
startActivity(intent);
Change1.this.finish();
}
});
myListView = (ListView) this.findViewById(R.id.myListView);
myEditText = (EditText) this.findViewById(R.id.myEditText);
myspinner1 = (Spinner) this.findViewById(R.id.myspinner1);
myspinner2 = (Spinner) this.findViewById(R.id.myspinner2);
myspinner3 = (Spinner) this.findViewById(R.id.myspinner3);
myToDoDB = new ToDoDB(this);
/* 取得DataBase裡的資料 */
myCursor = myToDoDB.select();
/* new SimpleCursorAdapter並將myCursor傳入，顯示資料的欄位為todo_text */
SimpleCursorAdapter adapter = new SimpleCursorAdapter(this, R.layout.list,
myCursor, new String[]
{ ToDoDB.FIELD_TEXT }, new int[]
{ R.id.listTextView1 });
myListView.setAdapter(adapter);
/* 將myListView加入OnItemClickListener */
myListView.setOnItemClickListener(new AdapterView.OnItemClickListener()
{
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3)
{
/* 將myCursor移到所點選的值 */
myCursor.moveToPosition(arg2);
/* 取得欄位_id的值 */
_id = myCursor.getInt(0);
/* 取得欄位todo_text的值 */
myEditText.setText(myCursor.getString(1));
}
});
myListView
.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener()
{
public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,
long arg3)
{
/* getSelectedItem所取得的是SQLiteCursor */
SQLiteCursor sc = (SQLiteCursor) arg0.getSelectedItem();
_id = sc.getInt(0);
myEditText.setText(sc.getString(1));
}
public void onNothingSelected(AdapterView<?> arg0)
{
}
});
}
private void addTodo()
{
if (myEditText.getText().toString().equals(""))
return;
/* 新增資料到資料庫 */
myToDoDB.insert(myEditText.getText().toString());
/* 重新查詢 */
myCursor.requery();
/* 重新整理myListView */
myListView.invalidateViews();
myEditText.setText("");
_id = 0;
}
private void editTodo()
{
if (myEditText.getText().toString().equals(""))
return;
/* 修改資料 */
myToDoDB.update(_id, myEditText.getText().toString());
myCursor.requery();
myListView.invalidateViews();
myEditText.setText("");
_id = 0;
}
private void deleteTodo()
{
if (_id == 0)
return;
/* 刪除資料 */
myToDoDB.delete(_id);
myCursor.requery();
myListView.invalidateViews();
myEditText.setText("");
_id = 0;
Spinner spinner = (Spinner) findViewById(R.id.myspinner1);
CharSequence[] seq = {"收入","支出"};
ArrayAdapter<CharSequence> adapter = new ArrayAdapter<CharSequence>(this, android.R.layout.simple_spinner_item, seq);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(adapter);
spinner.setOnHierarchyChangeListener(new OnHierarchyChangeListener() {
public void onChildViewAdded(View parent, View child) {
// TODO Auto-generated method stub
}
public void onChildViewRemoved(View parent, View child) {
// TODO Auto-generated method stub
}
});
Spinner spinner2 = (Spinner) findViewById(R.id.myspinner2);
CharSequence[] seq2 = {"早餐","中餐","晚餐"};
ArrayAdapter<CharSequence> adapter2 = new ArrayAdapter<CharSequence>(this, android.R.layout.simple_spinner_item, seq2);
adapter2.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner2.setAdapter(adapter2);
spinner2.setOnHierarchyChangeListener(new OnHierarchyChangeListener() {
public void onChildViewAdded(View parent, View child) {
// TODO Auto-generated method stub
}
public void onChildViewRemoved(View parent, View child) {
// TODO Auto-generated method stub
}
});
Spinner spinner3 = (Spinner) findViewById(R.id.myspinner3);
CharSequence[] seq3 = {"中式","西式","中西式","法式"};
ArrayAdapter<CharSequence> adapter3 = new ArrayAdapter<CharSequence>(this, android.R.layout.simple_spinner_item, seq3);
adapter3.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner3.setAdapter(adapter3);
spinner3.setOnHierarchyChangeListener(new OnHierarchyChangeListener() {
public void onChildViewAdded(View parent, View child) {
// TODO Auto-generated method stub
}
public void onChildViewRemoved(View parent, View child) {
// TODO Auto-generated method stub
}
});
}
}
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