读书笔记--Android编程权威指南

 @Override
    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        Log.i(TAG,"onSaveInstanceState");
        outState.putInt(KEY_INDEX,mCurrentIndex);
    }

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

        if (savedInstanceState!=null){
            mCurrentIndex=savedInstanceState.getInt(KEY_INDEX,0);
        }

        mQuestionTextView=(TextView)findViewById(R.id.question_text);
        updateQuestion();

        mTrueBtn= (Button) findViewById(R.id.true_btn);
        mFalseBtn= (Button) findViewById(R.id.false_btn);
        mNextButton= (Button) findViewById(R.id.next_button);
        mPrevBtn= (Button) findViewById(R.id.prev_button);
        mTrueBtn.setOnClickListener(this);
        mFalseBtn.setOnClickListener(this);
        mNextButton.setOnClickListener(this);
        mPrevBtn.setOnClickListener(this);
    }