小编Rom*_*fal的帖子

我是编程新手，如果此类问题已经被问过很多次，我很抱歉。我对这些错误感到非常困惑，请帮忙...这是我的 MainActivity.java

package id.romi.androidquiz;

import java.util.Collections;
import java.util.List;


import id.romi.androidquiz.entity.Quiz;
import id.romi.androidquiz.util.DBAdapter;
import id.romi.androidquiz.util.Utils;

import com.actionbarsherlock.app.SherlockActivity;



import android.app.AlertDialog;
import android.content.Intent;
import android.os.Bundle;
import android.os.CountDownTimer;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;
import android.widget.Toast;


public class MainActivity extends SherlockActivity implements OnClickListener
{
    private static final String TAG = MainActivity.class.getName();

    private TextView    soal, user, txtScore, soalCounter, Timer;
    private Button      btnNext;
    private RadioGroup  rg_answer;
    private RadioButton rb_A, rb_B, rb_C, rb_D;


    private DBAdapter   mDb;
    private …