1）修改strings.xml

   <string-array name="questions">

        <item>这个问题无法解决吗？:1</item>

        <item>android 考试会及格吗？:1</item>

        <item>肉包子是大葱猪肉的吗？:1</item>

        <item>中国最长的河流是：黄河？:0</item>

        <item>马来西亚机场遇害的朝鲜籍男子是被三月半搞掉的吗？:0</item>

    </string-array>

  2）修改MainActivity.java

  Question[] mQuestionArray;

  String [] questions;

  3）修改onCreate方法

  questions = getResources().getStringArray(R.array.questions);

  mQuestionArray=new Question[questions.length];

      for(int i=0;i<=questions.length-1;i++)

        {

            String[] details=questions[i].split(":");

            mQuestionArray[i]=new Question(details[0],details[1].equals("1"));

        }

  4）修改两个按钮的onClick方法

   mBtnPrev.setOnClickListener(new View.OnClickListener(){

            @Override

            public void onClick(View view) {

                if(mCurIdx==0)

                {

                    mCurIdx = mQuestionArray.length-1;

                    mTvQuestion.setText(mQuestionArray[mCurIdx].getM());

                }

                else {

                    mCurIdx = (mCurIdx - 1) % mQuestionArray.length;

                    mTvQuestion.setText(mQuestionArray[mCurIdx].getM());

                }

            }

        });

        mBtnNext.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

                mCurIdx=(mCurIdx+1)%mQuestionArray.length;

                mTvQuestion.setText(mQuestionArray[mCurIdx].getM());

            }

        });