Question

我在一项活动中有两个计时器。一个是倒数计时器，另一个是秒表。

对于倒数计时器，我想修改我的代码，让用户输入倒计时的时间（以小时或分钟的格式，如果可能的话，不是秒），并重置按钮。目前，我的代码仅从代码中指定的设定金额开始倒计时。

另外，如果可能，我不确定，所以我问 - 当倒数计时器点击＆＃34; 0＆＃34;时，它会使手机振动或做某种通知（宁愿振动。）

对于秒表，我只需要让我的重置按钮也能正常工作。这是计时器的代码

 public class timers extends Activity {
/** Called when the activity is first created. */
Button btnStart, btnStop;
TextView textViewTime;
private TextView textTimer;
private Button startButton;
private Button pauseButton;
private long startTime = 0L;
private Handler myHandler = new Handler();
long timeInMillies = 0L;
long timeSwap = 0L;
long finalTime = 0L;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_timers);
    btnStart = (Button)findViewById(R.id.btnStart);
    btnStop = (Button)findViewById(R.id.btnStop);
    textViewTime = (TextView)findViewById(R.id.textViewTime);
    textViewTime.setText("00:03:00");
    final CounterClass timer = new CounterClass(180000,1000);
    btnStart.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            timer.start();
        }
    });
    btnStop.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            timer.cancel();
        }
    });

    textTimer = (TextView) findViewById(R.id.textTimer);

    startButton = (Button) findViewById(R.id.btnStart2);
    startButton.setOnClickListener(new View.OnClickListener() {
        public void onClick(View view) {
            startTime = SystemClock.uptimeMillis();
            myHandler.postDelayed(updateTimerMethod, 0);

        }

    });

    pauseButton = (Button) findViewById(R.id.btnPause2);
    pauseButton.setOnClickListener(new View.OnClickListener() {
        public void onClick(View view) {
            timeSwap += timeInMillies;
            myHandler.removeCallbacks(updateTimerMethod);

        }
    });

}
@TargetApi(Build.VERSION_CODES.GINGERBREAD)
@SuppressLint("NewApi")
public class CounterClass extends CountDownTimer {
    public CounterClass(long millisInFuture, long countDownInterval) {
        super(millisInFuture, countDownInterval);
    }
    @Override
    public void onFinish() {
        textViewTime.setText("Completed.");
    }
    @SuppressLint("NewApi")
    @TargetApi(Build.VERSION_CODES.GINGERBREAD)
    @Override
    public void onTick(long millisUntilFinished) {
        long millis = millisUntilFinished;
        String hms = String.format("%02d:%02d:%02d", TimeUnit.MILLISECONDS.toHours(millis),
                TimeUnit.MILLISECONDS.toMinutes(millis) - TimeUnit.HOURS.toMinutes(TimeUnit.MILLISECONDS.toHours(millis)),
                TimeUnit.MILLISECONDS.toSeconds(millis) - TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(millis)));
        System.out.println(hms);
        textViewTime.setText(hms);
    }
}
private Runnable updateTimerMethod = new Runnable() {

    public void run() {
        timeInMillies = SystemClock.uptimeMillis() - startTime;
        finalTime = timeSwap + timeInMillies;

        int seconds = (int) (finalTime / 1000);
        int minutes = seconds / 60;
        seconds = seconds % 60;
        int milliseconds = (int) (finalTime % 1000);
        textTimer.setText("" + minutes + ":"
                + String.format("%02d", seconds) + ":"
                + String.format("%03d", milliseconds));
        myHandler.postDelayed(this, 0);
    }

};

}

布局代码

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textAppearance="?android:attr/textAppearanceSmall"
    android:text="Countdown Timer"
    android:id="@+id/textView"
    android:textSize="20dp"
    android:layout_alignParentTop="true"
    android:layout_centerHorizontal="true" />

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textAppearance="?android:attr/textAppearanceSmall"
    android:text="Stopwatch"
    android:id="@+id/textView2"
    android:textSize="20dp"
    android:layout_centerHorizontal="true"
    android:layout_above="@+id/btnStart2" />

<TextView
    android:id="@+id/textViewTime"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerHorizontal="true"
    android:layout_marginBottom="17dp"
    android:textSize="25sp"
    android:layout_below="@+id/textView"
    android:textColor="#ffffb524"
    android:text="00:00:00" />

<Button
    android:id="@+id/btnStart"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Start"
    android:layout_below="@+id/textViewTime"
    android:layout_toLeftOf="@+id/textViewTime" />
<Button
    android:id="@+id/btnStop"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Stop"
    android:layout_below="@+id/textViewTime"
    android:layout_toRightOf="@+id/textViewTime" />

<TextView
    android:id="@+id/textTimer"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textSize="40sp"
    android:textColor="#FFFFB524"
    android:text="00:00:00"
    android:layout_alignParentBottom="true"
    android:layout_centerHorizontal="true"
    android:layout_marginBottom="152dp"
    android:textIsSelectable="true" />

<Button
    android:id="@+id/btnPause2"
    android:layout_width="90dp"
    android:layout_height="45dp"
    android:text="Pause"
    android:layout_toEndOf="@+id/textTimer"
    android:layout_toStartOf="@+id/resetButton2"
    android:layout_below="@+id/btnStart2"
    android:layout_alignLeft="@+id/textView2"
    android:layout_alignStart="@+id/textView2" />

<Button
    android:id="@+id/btnStart2"
    android:layout_width="90dp"
    android:layout_height="45dp"
    android:text="Start"
    android:layout_toEndOf="@+id/btnPause2"
    android:layout_marginTop="72dp"
    android:layout_alignTop="@+id/textTimer"
    android:layout_alignLeft="@+id/textTimer" />

<Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Reset"
    android:id="@+id/resetButton2"
    android:layout_toEndOf="@+id/textView2"
    android:layout_above="@+id/btnPause2"
    android:layout_toRightOf="@+id/textView2" />

<EditText
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:inputType="time"
    android:ems="10"
    android:id="@+id/setTime"
    android:layout_toEndOf="@+id/btnStart"
    android:layout_below="@+id/btnStart"
    android:layout_alignLeft="@+id/textView"
    android:layout_alignStart="@+id/textView" />

<Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Reset"
    android:id="@+id/resetButton"
    android:layout_below="@+id/setTime"
    android:layout_toRightOf="@+id/btnStart"
    android:layout_toEndOf="@+id/btnStart" />


</RelativeLayout>

Answer 1

一旦你在其上放置@your_id并使用findViewById（R.id.your_id）来获取视图，你应该能够从edittext中读取时间输入。然后你可以使用getText（）来获取它的文本。

重置按钮类似于您已有的开始按钮。只需让它停止计时器并清除编辑文本视图。如果使用字段而不是局部变量，则应该在onclick方法中使用它。

绝对可以在达到零时振动手机。我会推荐一个通知。在此处阅读有关通知构建器的信息。

http://developer.android.com/reference/android/app/Notification.Builder.html

android-帮助需要秒表和倒计时器

1 个答案: