Question

我的倒数计时器有些问题。我基本上有一个在其中设置值的微调器。这是微调器的代码：

tSpin1.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
        @Override
        public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {


            if(i == 0){
                timeInms1 = 8400000;
            }
           if (i == 1){
                timeInms1 = 13200000;
            }
           if (i == 2){
                timeInms1 = 18000000;
            }
            if(i == 3){
                timeInms1 = 22800000;
            }
            if(i == 4){
                timeInms1 = 27600000;
            }
        }

        @Override
        public void onNothingSelected(AdapterView<?> adapterView) {

        }
    });

然后我想将选择传递给倒计时器，以便根据用户之前在微调器中所做的选择，使计时器倒计时给定的时间。下面是倒数计时器的代码：

 final CountDownTimer lumbyTree = new CountDownTimer(timeInms1,1000) {


        @Override
        public void onTick(long lumbyTreeTimeToGo) {
            int mins = (int)lumbyTreeTimeToGo/60000;
            int seconds = (int)(lumbyTreeTimeToGo-(mins*60000))/1000;
            tTimer1.setText(mins +":" +seconds);
        }

        @Override
        public void onFinish() {
            tTimer1.setText("00:09");
        }
    };

    tStart1.setOnClickListener(new View.OnClickListener(){
        @Override
        public void onClick(View v) {
            lumbyTree.start();

        }
    });

问题是，我认为＆＃39; timeInms1＆＃39;变量由于某种原因永远不会得到值。计时器直接进入onFinish方法。我把一些随机测试语句放入微调器中，如果＆＃39;括号以确保它正常运行（例如更改textView中的文本）并且它按预期运行，括号中的内容正确执行。我也尝试用随机值（例如30000）初始化timeInms1并运行，但没有改变，它只运行定时器30秒。让我感到困惑的是，当我将诸如setText之类的代码放入＆＃39; spinner＆＃39;它会执行的括号，但是当我去改变＆＃39; TimeInms1＆＃39;的值时它不起作用。

提前感谢您的帮助！

Answer 1

你的MainActivity .java看起来应该是这样的

public class MainActivity extends Activity {
CountDownTimer lumbyTree;
    Textview tTimer1;
int timeInms1;

private void createCountDownTimer() {
    lumbyTree = new CountDownTimer(timeInms1,1000) {

        @Override
    public void onTick(long lumbyTreeTimeToGo) {
        int mins = (int)lumbyTreeTimeToGo/60000;
        int seconds = (int)(lumbyTreeTimeToGo-(mins*60000))/1000;
        tTimer1.setText(mins +":" +seconds);
    }

        @Override
    public void onFinish() {
        tTimer1.setText("00:09");
    }
    };

}
    @Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Button tStart1=(Button)findViewById(R.id.button1);
    tStart1.setOnClickListener(new View.OnClickListener(){
        @Override
        public void onClick(View v) {
            createCountDownTimer();
            lumbyTree.start();

        }
    });
    Spinner tSpin1 = (Spinner)findViewById(R.id.spinner1);
    tSpin1.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
    @Override
    public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {


        if(i == 0){
            timeInms1 = 8400000;
        }
       if (i == 1){
            timeInms1 = 13200000;
        }
       if (i == 2){
            timeInms1 = 18000000;
        }
        if(i == 3){
            timeInms1 = 22800000;
        }
        if(i == 4){
            timeInms1 = 27600000;
        }
    }

    @Override
    public void onNothingSelected(AdapterView<?> adapterView) {

    }
});
}

倒计时器问题（没有正确倒数）

1 个答案: