当我试图验证我的用户名和密码时,我收到一个错误,说找不到setError,请你帮忙找出我的错误.我在androidstudio1.2.2中执行了这个

login.java

package com.example.poornima.bookmyticket;

import com.example.poornima.bookmyticket.util.SystemUiHider;

import android.annotation.TargetApi;
import android.app.Activity;
import android.content.Intent;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import android.view.Menu;
import android.widget.TextView;
import android.widget.Toast;


/**
 * An example full-screen activity that shows and hides the system UI (i.e.
 * status bar and navigation/system bar) with user interaction.
 *
 * @see SystemUiHider
 */
public class login extends Activity implements View.OnClickListener {
    private Button bLogin, bRegister;
   private  EditText eusername, epassword; …