SMS demo - GUI

package thieu.mao;

import thieu.mao.R.string;
import android.net.Uri;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.telephony.SmsManager;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

public class MainActivity extends Activity {

    private EditText etNumber;
    private EditText etContent;
    private Button btSend;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.giaodien);

        etNumber = (EditText) findViewById(R.id.etNumber);
        etContent = (EditText) findViewById(R.id.etContent);
        btSend = (Button) findViewById(R.id.btSend);

        btSend.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                String strNumber = etNumber.getText().toString();
                if ((strNumber.length() != 10) && (strNumber.length() != 11)) {
                    strNumber = "0917735107";
                }
                Uri uri = Uri.parse("smsto:" + strNumber);
                Intent intent = new Intent(Intent.ACTION_SENDTO, uri);
                String strContent = etContent.getText().toString();
                intent.putExtra("sms_body", strContent);
                startActivity(intent);
            }
        });
    }

    @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;
    }

}