sqlite儲存大資料量資料之淺見
阿新 • • 發佈：2019-02-04
public class Dictionary extends Activity implements OnClickListener, TextWatcher{
private final String DATABASE_PATH = android.os.Environment
.getExternalStorageDirectory().getAbsolutePath()
+ "/dictionary";
private final String DATABASE_FILENAME = "dictionary.db3";
SQLiteDatabase database;
Button btnSelectWord;
AutoCompleteTextView actvWord;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// 開啟資料庫，database是在Main類中定義的一個SQLiteDatabase型別的變數
database = openDatabase();
// 下面的程式碼裝載了相關元件，並設定了相應的事件
btnSelectWord = (Button) findViewById(R.id.btnSelectWord);
actvWord = (AutoCompleteTextView) findViewById(R.id.actvWord);
btnSelectWord.setOnClickListener(this);
actvWord.addTextChangedListener(this);
}
public void onClick(View view)
{
String sql = "select chinese from t_words where english=?";
Cursor cursor = database.rawQuery(sql, new String[]
{ actvWord.getText().toString() });
String result = "未找到該資訊.";
// 如果查詢english資訊，顯示其chinese資訊
if (cursor.getCount() > 0)
{
// 必須使用moveToFirst方法將記錄指標移動到第1條記錄的位置
cursor.moveToFirst();
result = cursor.getString(cursor.getColumnIndex("chinese"));
Log.i("tran", "success"+result);
}
// 顯示查詢結果對話方塊
new AlertDialog.Builder(this).setTitle("查詢結果").setMessage(result)
.setPositiveButton("關閉", null).show();
private final String DATABASE_PATH = android.os.Environment
.getExternalStorageDirectory().getAbsolutePath()
+ "/dictionary";
private final String DATABASE_FILENAME = "dictionary.db3";
SQLiteDatabase database;
Button btnSelectWord;
AutoCompleteTextView actvWord;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// 開啟資料庫，database是在Main類中定義的一個SQLiteDatabase型別的變數
database = openDatabase();
// 下面的程式碼裝載了相關元件，並設定了相應的事件
btnSelectWord = (Button) findViewById(R.id.btnSelectWord);
actvWord = (AutoCompleteTextView) findViewById(R.id.actvWord);
btnSelectWord.setOnClickListener(this);
actvWord.addTextChangedListener(this);
}
public void onClick(View view)
{
String sql = "select chinese from t_words where english=?";
Cursor cursor = database.rawQuery(sql, new String[]
{ actvWord.getText().toString() });
String result = "未找到該資訊.";
// 如果查詢english資訊，顯示其chinese資訊
if (cursor.getCount() > 0)
{
// 必須使用moveToFirst方法將記錄指標移動到第1條記錄的位置
cursor.moveToFirst();
result = cursor.getString(cursor.getColumnIndex("chinese"));
Log.i("tran", "success"+result);
}
// 顯示查詢結果對話方塊
new AlertDialog.Builder(this).setTitle("查詢結果").setMessage(result)
.setPositiveButton("關閉", null).show();