Question

       public class TrueFalseActivity extends Activity implements View.OnClickListener{
        Button buttonClicked = null;
        List<QuestionTrueFalse> questionTrueFalseList;
        int myscore = 0;
        int quid=0;
        int id ;
        TextView tv, tv1;
       QuestionTrueFalse curQues;
        Button b1, b2;
        Button next, back;
         Button button;

        QuestionTrueFalse cur;

        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_trfal);
            tv=(TextView) findViewById(R.id.tv1);
            b1=(Button) findViewById(R.id.b1);
            b2=(Button) findViewById(R.id.b2);

            b1.setOnClickListener(this);
            b2.setOnClickListener(this);
            DbHelper db = new DbHelper(this);

            questionTrueFalseList = db.getAllTrFalsQuestions();
            if (questionTrueFalseList != null && questionTrueFalseList.size() != 0) {
                curQues = questionTrueFalseList.get(quid);
                try {
                    setQuestionView();
                }catch (NullPointerException e)
                {
                    Toast.makeText(getApplicationContext(),"Exception caught",Toast.LENGTH_LONG).show();
                }
            }
     next=(Button) findViewById(R.id.forw);
            back=(Button) findViewById(R.id.back);
            next.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                   button=(Button) v;

                   String buttonText=button.getText().toString();



                    if(curQues.getAnsw().equals(buttonText))
                    {
                        myscore++;
                    }
                    cur=curQues;

                    if(quid<19){
                        quid++;
                        curQues=questionTrueFalseList.get(quid);


                        setQuestionView();

                    }else{

                        Intent intent = new Intent(TrueFalseActivity.this, ResultActivity.class);
                        Bundle b = new Bundle();
                        b.putInt("score", myscore); //Your score
                        intent.putExtras(b); //Put your score to your next Intent
                        startActivity(intent);
                        finish();
                    }
                }
            });
     back.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    if (quid > 0) {
                        quid--;
                        curQues = questionTrueFalseList.get(quid);
                        setQuestionView();
                    }
                }
            });
    private void setQuestionView() {
            tv.setText(curQues.getQues());
            b1.setText(curQues.getOpt1());
            b2.setText(curQues.getOpt2());
                }
     public void onClick(View v) {
           // final Button button;

            button=(Button) v;
                 String buttonText=button.getText().toString();
    enter code here
//Button is set red if answer is correct..
            if (curQues.getAnsw().equals(buttonText))
            {
                button.setBackgroundColor(Color.GREEN);

                  myscore++;


            }
     //Button will be set to red if answer is false
            else
            {
                button.setBackgroundColor(Color.RED);

            }
             if(quid>19){
                        countDownTimer.cancel();
                        timerHasStarted = false;
                Intent intent = new Intent(TrueFalseActivity.this, ResultActivity.class);
                Bundle b = new Bundle();
                b.putInt("score", myscore); //Your score
                intent.putExtras(b); //Put your score to your next Intent
                startActivity(intent);
                finish();
            }
    }
    }

正在开发测验应用程序，它有2个按钮，其中一个onClick（）。我点击了一个按钮然后单击下一个相同的颜色正在进行到下一个按钮如何单击下一步按钮时清除按钮颜色。我应该如何清除下一个问题的颜色？我是android的新手。任何人都可以帮助我解决这个问题。提前谢谢。

Answer 1

在onClickListener中，您的下一个按钮需要重置按钮的颜色;

像这样：

next.setOnClickListener(new View.OnClickListener() { 
    @Override 
    public void onClick(View v) { 
        b1.setBackgroundResource(android.R.drawable.btn_default);
        b2.setBackgroundResource(android.R.drawable.btn_default);
    }
});

单击下一步按钮时如何清除按钮颜色？

1 个答案: