使用基本适配器和列表视图显示数据库中的数据
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【中文标题】使用基本适配器和列表视图显示数据库中的数据【英文标题】：Display data from database using base adapter and listview 【发布时间】：2014-06-11 22:28:16 【问题描述】：我想将 SQLite 数据库中的数据显示到我的自定义列表视图中
这是我的活动：
public class Main_activity extends Activity implements OnItemClickListener
public static final String[] titles = new String[] "Strawberry",
"Banana", "Orange" ;
public static final String[] descriptions = new String[]
"It is an aggregate accessory fruit",
"It is the largest herbaceous flowering plant", "Citrus Fruit"
;
ListView listView;
List<RowItem> rowItems;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.layout_main);
rowItems = new ArrayList<RowItem>();
for (int i = 0; i < titles.length; i++)
RowItem item = new RowItem(titles[i], descriptions[i]);
rowItems.add(item);
listView = (ListView) findViewById(R.id.list);
CustomBaseAdapter adapter = new CustomBaseAdapter(this, rowItems);
listView.setAdapter(adapter);
listView.setOnItemClickListener(this);
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id)
Toast toast = Toast.makeText(getApplicationContext(),
"Item " + (position + 1) + ": " + rowItems.get(position),
Toast.LENGTH_SHORT);
toast.setGravity(Gravity.BOTTOM|Gravity.CENTER_HORIZONTAL, 0, 0);
toast.show();
在这个活动中，listview 将显示来自字符串标题和描述的数据，现在我想用我的 sqlite 数据库中的数据替换这些字符串。 谁能告诉我该怎么做？
提供导致问题的教程链接也很有帮助
【问题讨论】：
使用游标访问您的 sqlite 数据库。迭代游标以获取所有数据并将这些数据添加到列表中。你想要多个数据，然后创建cutim列表。 【参考方案1】：创建数据库
public class DatabaseHandler extends SQLiteOpenHelper
//Database Version
private static final int DATABASE_VERSION = 1;
//Database Name
private static final String DATABASE_NAME = "Test";
//Table Name
private static final String TABLE_TEST = "TestTable";
//Column Name
private static final String KEY_ID = "id";
private static final String KEY_NAME = "name";
private static final String KEY_AGE = "age";
public DatabaseHandler(Context context)
super(context, DATABASE_NAME, null, DATABASE_VERSION);
//Create Table
@Override
public void onCreate(SQLiteDatabase db)
String CREATE_CONTACTS_TABLE = "CREATE TABLE " + TABLE_TEST + "("
+ KEY_ID + " INTEGER PRIMARY KEY," + KEY_NAME + " TEXT,"
+ KEY_AGE + " TEXT" + ")";
db.execSQL(CREATE_CONTACTS_TABLE);
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion)
db.execSQL("DROP TABLE IF EXISTS " + TABLE_TEST);
onCreate(db);
//Insert Value
public void adddata(Context context,String movieId,String songId)
SQLiteDatabase db = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(KEY_NAME, movieId);
values.put(KEY_AGE, songId);
db.insert(TABLE_TEST, null, values);
db.close();
//Get Row Count
public int getCount()
String countQuery = "SELECT * FROM " + TABLE_TEST;
int count = 0;
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.rawQuery(countQuery, null);
if(cursor != null && !cursor.isClosed())
count = cursor.getCount();
cursor.close();
return count;
//Delete Query
public void removeFav(int id)
String countQuery = "DELETE FROM " + TABLE_TEST + " where " + KEY_ID + "= " + id ;
SQLiteDatabase db = this.getReadableDatabase();
db.execSQL(countQuery);
//Get FavList
public List<FavoriteList> getFavList()
String selectQuery = "SELECT * FROM " + TABLE_TEST;
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery(selectQuery, null);
List<FavoriteList> FavList = new ArrayList<FavoriteList>();
if (cursor.moveToFirst())
do
FavoriteList list = new FavoriteList();
list.setId(Integer.parseInt(cursor.getString(0)));
list.setName(cursor.getString(1));
list.setAge(cursor.getString(2));
FavList.add(list);
while (cursor.moveToNext());
return FavList;
并使用下面的基本适配器创建自定义列表视图
public class ViewAdapter extends BaseAdapter
LayoutInflater mInflater;
public ViewAdapter()
mInflater = LayoutInflater.from(context);
@Override
public int getCount()
return favoriteList.size();
@Override
public Object getItem(int position)
return null;
@Override
public long getItemId(int position)
return position;
@Override
public View getView(final int position, View convertView, ViewGroup parent)
if (convertView == null)
convertView = mInflater.inflate(R.layout.listitem,null);
final TextView nameText = (TextView) convertView.findViewById(R.id.nameText);
nameText.setText("Name : "+favoriteList.get(position).getName());
final TextView ageText = (TextView) convertView.findViewById(R.id.ageText);
ageText.setText("Age : "+favoriteList.get(position).getAge());
final Button edit = (Button) convertView.findViewById(R.id.edit);
edit.setOnClickListener(new OnClickListener()
@Override
public void onClick(View v)
final Dialog dialog = new Dialog(context);
dialog.setContentView(R.layout.row);
dialog.setTitle("Add Data to Database");
final EditText name = (EditText) dialog.findViewById(R.id.name);
final EditText age = (EditText) dialog.findViewById(R.id.age);
Button Add = (Button) dialog.findViewById(R.id.Add);
Add.setText("Add");
Add.setOnClickListener(new OnClickListener()
@Override
public void onClick(View v)
if(name.getText().toString() != null && name.getText().toString().length() >0 )
if(age.getText().toString() != null && age.getText().toString().length() >0 )
db.updateRow(favoriteList.get(position).getId(), name.getText().toString(), age.getText().toString());
favoriteList = db.getFavList();
listView.setAdapter(new ViewAdapter());
dialog.dismiss();
else
Toast.makeText(getApplicationContext(), "Please Enter the Age", Toast.LENGTH_LONG).show();
else
Toast.makeText(getApplicationContext(), "Please Enter the Name", Toast.LENGTH_LONG).show();
);
dialog.show();
);
final Button delete = (Button) convertView.findViewById(R.id.delete);
delete.setOnClickListener(new OnClickListener()
@Override
public void onClick(View v)
db.removeFav(favoriteList.get(position).getId());
notifyDataSetChanged();
favoriteList = db.getFavList();
listView.setAdapter(new ViewAdapter());
);
return convertView;
从数据库中获取数据：
favoriteList = db.getFavList();
最后添加适配器
listView.setAdapter(new ViewAdapter());
如果您需要更多帮助，请查看以下网址
http://mylearnandroid.blogspot.in/2014/04/android-sqlite-with-custom-listview.html
【讨论】：
我有一个小问题：它是什么 R.id.name ......因为没有这样的 id 是用 xml 写入的，并且类似地 Add 没有写入????。请指定，因为我也是 android 的新手。还有什么是 dialog.setContentView(R.layout.row);?????????以上是关于使用基本适配器和列表视图显示数据库中的数据的主要内容，如果未能解决你的问题，请参考以下文章