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從上一個問題我問,我仍然有同樣的問題。我不知道如何使用數據庫(SQLite的),以「同步」與我的應用程序登錄或註冊SQLite的Android登錄和註冊
package log1.log2;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class Login extends Activity {
UserDB db = new UserDB(this);
/** Called when the activity is first created. */
private EditText etUsername;
private EditText etPassword;
private Button btnLogin;
private Button btnRegister;
private TextView lblResult;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// Get the EditText and Button References
etUsername = (EditText)findViewById(R.id.usernametxt);
etPassword = (EditText)findViewById(R.id.passwordtxt);
btnLogin = (Button)findViewById(R.id.btnLogin);
btnRegister = (Button)findViewById(R.id.btnRegister);
lblResult = (TextView)findViewById(R.id.msglbl);
//Cursor c = (Cursor) db.getAllTitles();
//Button btnArrival = (Button) findViewById(R.id.btnRegister);
//btnArrival.setOnClickListener(this);
// Set Click Listener
btnRegister.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent intent=new Intent(Login.this,Register.class);
startActivity(intent);
}
});
btnLogin.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
db.open();
// Check Login
String username = etUsername.getText().toString();
String password = etPassword.getText().toString();
if(username.equals("select username from Users")){
if(password.equals("select password from users where username = username"))
{
Intent intent=new Intent(Login.this,Test.class);
startActivity(intent);
}
else
{
lblResult.setText("Wrong password");
}
} else {
lblResult.setText("Username does not exist. Please register.");
}
db.close();
}
});
}
}
我應該使用從「選擇」「」「其中」語句?或者有另一種方式?