Question

所以我在Android Studio中制作游戏，你应该在60秒内尽可能多地点击圆圈。我有特定的TextView用于时间和你取得的分数但是！在第一次点击之前，时间显示“点击开始”，以便计时器在用户需要时启动，而不是自己启动。我的问题是我在圆圈下面有一个重置按钮，用户可以重新开始回到开始，分数被保存，时间应该说“点击开始”但是计数器只是冻结并且什么都不做，直到用户再次点击它并且它正常开始。我无法弄清楚为什么它不会将它的值改为“点按开始”，当我告诉它在重置按钮的点击监听器中这样做时

代码：

protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        final Button button = (Button) findViewById(R.id.button);
        final TextView txtview2 = (TextView) findViewById(R.id.textView2);
        final TextView txtview = (TextView) findViewById(R.id.textView);
        updatetime(txtview2);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if(started == false)
                {
                    reverseTimer(60,txtview2,button,txtview);
                    started = true;
                }
                score++;
                randnum = r.nextInt(10 - 0) + 0;
                if(randnum == 0)
                    button.setBackground(getResources().getDrawable(R.drawable.circle));
                else if(randnum == 1)
                    button.setBackground(getResources().getDrawable(R.drawable.circle1));
                else if(randnum == 2)
                    button.setBackground(getResources().getDrawable(R.drawable.circle2));
                else if(randnum == 3)
                    button.setBackground(getResources().getDrawable(R.drawable.circle3));
                else if(randnum == 4)
                    button.setBackground(getResources().getDrawable(R.drawable.circle4));
                else if(randnum == 5)
                    button.setBackground(getResources().getDrawable(R.drawable.circle5));
                else if(randnum == 6)
                    button.setBackground(getResources().getDrawable(R.drawable.circle6));
                else if(randnum == 7)
                    button.setBackground(getResources().getDrawable(R.drawable.circle7));
                else if(randnum == 8)
                    button.setBackground(getResources().getDrawable(R.drawable.circle8));
                else if(randnum == 9)
                    button.setBackground(getResources().getDrawable(R.drawable.circle9));
                button.setText(String.valueOf(score));
            }
        });
        Button reset_button = (Button) findViewById(R.id.button3);
        reset_button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Reset(txtview2,button);
                started = true;
            }
        });
    }

我的重置功能：

public void Reset(TextView txt,Button button)
    {
        updatetime(txt);
        score = 0;
        button.setText(String.valueOf(score));
        button.setBackground(getResources().getDrawable(R.drawable.circle));
    }

设置高分是刚刚设定得分......

    public void updatetime(TextView txt)
    {
        txt.setText("Time : Tap to start");
    }
    public void sethighscore(TextView txt)
    {
        txt.setText("Score: " + String.valueOf(score));
    }

我的计时器从60到0：

 public void reverseTimer(int Seconds,final TextView tv,final Button button,final TextView txt2){

        CountDownTimer CountDownTimer1 = new CountDownTimer(Seconds* 1000+1000, 1000) {

            public void onTick(long millisUntilFinished) {
                if(clicked)
                {
                    this.cancel();
                    clicked = false;
                    if(score > highscore)
                        sethighscore(txt2);
                    Reset(tv,button);
                    started = false;
                }
                int seconds = (int) (millisUntilFinished / 1000);
                int minutes = seconds / 60;
                Button button3 = (Button) findViewById(R.id.button3);
                button3.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        clicked = true;
                    }
                });
                seconds = seconds % 60;
                tv.setText("Time : " + String.valueOf(minutes)
                        + ":" + String.valueOf(seconds));
            }
            public void onFinish() {
                if(score > highscore)
                    sethighscore(txt2);
                tv.setText("Completed");
                Reset(tv,button);
            }
        }.start();
    }

Answer 1

发生的事情是textView是在主线程中定义的，即UI线程。在其中设置文本不会在另一个线程上工作。你要做的就是创建一个处理程序对象。

Handler handler=new Handler(getApplicationContext().getMainLooper());

现在你想要textView.setText("string");在那里添加此代码的地方。

 handler.post(new Runnable() {
                        @Override
                        public void run() {
                          textView.setText("string");
                          }
                    });

TextView拒绝更改文本

1 个答案: