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[英]how to fetch the data from sqlite database and show in listview in android
[英]Android listview fetch the data from sqlite database
我想在android SQlite中開發一個小項目。
我想將員工信息存儲到數據庫中。這些字段是姓名,城市,郵件ID和電話號碼。
然后,我想在列表視圖中獲取數據。它將按員工姓名顯示。當我單擊姓名(另一個意圖)時,它將顯示該姓名的所有信息。
我已經創建了數據庫幫助程序類,並且可以存儲信息。但是我無法按名稱檢索數據庫。
public class DBHelper extends SQLiteOpenHelper {
static final String DATABASE = "contactapp.db";
static final int VERSION = 1;
static final String TABLE = "contact";
static final String C_ID = "_id";
static final String C_ENAME = "ename";
static final String C_city = "city";
static final String C_phno = "ph_no";
public DBHelper(Context context) {
super(context, DATABASE, null, VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL("CREATE TABLE " + TABLE + " ( " + C_ID
+ " INTEGER PRIMARY KEY AUTOINCREMENT, " + C_ENAME + " text, "
+ C_city + " text, " + C_phno + " integer )");
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
db.execSQL("Drop table " + TABLE);
onCreate(db);
}
}
和management.java將名稱,城市和電話號碼存儲在sqlite數據庫中。
public class Management extends Activity {
EditText tname,tcity,tph_no;
Button button1;
DBHelper helper;
SQLiteDatabase db;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.management);
helper = new DBHelper(this);
tname = (EditText) findViewById(R.id.tname);
tcity = (EditText) findViewById(R.id.tcity);
tph_no = (EditText) findViewById(R.id.tph_no);
button1=(Button) findViewById(R.id.button1);
button1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
Context context = getApplicationContext();
int s2=Integer.parseInt(tph_no.getText().toString());
ContentValues values = new ContentValues();
values.put(DBHelper.C_ENAME, tname.getText().toString());
values.put(DBHelper.C_city, tcity.getText().toString());
values.put(DBHelper.C_phno, s2);
db = helper.getWritableDatabase();
db.insert(DBHelper.TABLE, null, values);
db.close();
Toast.makeText(context, "Employee Added Successfully",
Toast.LENGTH_LONG).show();
}
});
}
}
現在我只想檢索/獲取名稱作為列表。.當我單擊名稱時,它將轉到另一個意圖,並顯示名稱(再次),城市和電話號碼。
簽出此鏈接
SimpleCursorAdapter
如果直接使用數據庫,則可以使用SimpleCursorAdapter
定義ListView的數據。
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