android 登录问题

[werqweqweq]

public class loginActivity extends Activity
{


/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout. login);
EditText etUid = (EditText)findViewById(R.id. etUid); //获得帐号EditText
EditText etPwd = (EditText)findViewById(R.id. etPwd); //获得密码EditText
final String uid = etUid.getEditableText().toString().trim(); //获得输入的帐号
final String pwd = etPwd.getEditableText().toString().trim(); //获得输入的密码

final String user="dd" ;
Button button7 = (Button) findViewById(R.id. btnLogin);

button7.setOnClickListener( new Button.OnClickListener() {
public void onClick(View v)
{
if(uid.equals(user))
login();
else
new AlertDialog.Builder(loginActivity.this ).setTitle("hello").setMessage( "您输入的用户名或密码不正确" ).show();


}
});


Button btnexit = (Button)findViewById(R.id. btnReg);
btnexit.setOnClickListener( new View.OnClickListener() {
@Override
public void onClick(View v) {
android.os.Process. killProcess(android.os.Process. myPid()); //结束进程，退出程序
}
});



}

public void login(){

Intent intent = new Intent();

intent.setClass(loginActivity. this, Activity01.class);

startActivity(intent);
loginActivity. this.finish();

}
}