Android เป็นภาษาต่างดาว ลองเปลี่ยน File Encoding เป็น x-windows-874 ก็ยังไม่ได้อะครับ

package test.myapplication;

import android.content.Intent;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity implements View.OnClickListener{

    SharedData data;
    Button login;
    EditText username,password;
    final SQLiteTumor db = new SQLiteTumor(this);

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initialize();
        db.getWritableDatabase();
        data = new SharedData(getApplicationContext());

    }

    private void initialize()
    {
        login = (Button)findViewById(R.id.btnLogin);
        username = (EditText)findViewById(R.id.edtUsername);
        password = (EditText)findViewById(R.id.edtPassword);
        login.setOnClickListener(this);
        

        username.setText("ภาษาไทย");
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public void onClick(View view) {
        //Toast.makeText(getApplicationContext(),"login",Toast.LENGTH_LONG).show();
        switch (view.getId())
        {
            case R.id.btnLogin:
                login();break;
        }
    }

    private void login() {
        //Toast.makeText(getApplicationContext(),"login",Toast.LENGTH_LONG).show();
        String strUsername = username.getText().toString();
        String strPassword = password.getText().toString();
        if(db.checkLogin(strUsername, strPassword))
        {
            Toast.makeText(getApplicationContext(),"login success",Toast.LENGTH_LONG).show();
            data.createSessionLogin(strUsername,strPassword);

            Intent i = new Intent(getApplicationContext(),SelectActivity.class);
            startActivity(i);

        }
        else
            Toast.makeText(getApplicationContext(),"login fail",Toast.LENGTH_LONG).show();

    }
}