切换按钮以启动 Timer1 和 Timer2，但仅停止 Timer1

Question

我试图说服一个切换按钮在单击“开始计时器”时启动 Timer1 和 Timer2，并且只停止 Timer1，而让 Timer2 继续在“停止计时器”上 我的主要活动如下所示：

public class MainActivity extends AppCompatActivity {

    long init, now, paused, millis, seconds, minutes, hours;
    TextView display;
    TextView display2;
    Handler handler;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        handler = new Handler();
        display = (TextView) findViewById(R.id.chronometer1);
        final ToggleButton passTog = (ToggleButton) findViewById(R.id.toggleButton1);
        final Runnable updater = new Runnable() {
            @Override
            public void run() {
                if (passTog.isChecked()) {
                    now = System.currentTimeMillis();
                    millis = now - init;
                    seconds = ((millis / 1000) % 60);
                    minutes = (millis / 1000) / 60;
                    hours = (minutes / 3600000);
                    String hh = hours < 10 ? "0" + hours : hours + "";
                    String mm = minutes < 10 ? "0" + minutes : minutes + "";
                    String ss = seconds < 10 ? "0" + seconds : seconds + "";
                    display.setText(hh + ":" + mm + ":" + ss);
                    handler.postDelayed(this, 10);
                    continueTimer();
                }
            }
        };


        passTog.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                init = System.currentTimeMillis();
                handler.post(updater);
            }
        });
    }

    @Override
    protected void onPause() {
        super.onPause();
        paused = System.currentTimeMillis();

    }

    @Override
    protected void onResume() {
        super.onResume();
        init += System.currentTimeMillis() - paused;

    }


    public void continueTimer() {
        display2 = (TextView) findViewById(R.id.chronometer2);
        now = System.currentTimeMillis();
        millis = now - init;
        seconds = ((millis / 1000) % 60);
        minutes = (millis / 1000) / 60;
        hours = (minutes / 3600000);
        String hh = hours < 10 ? "0" + hours : hours + "";
        String mm = minutes < 10 ? "0" + minutes : minutes + "";
        String ss = seconds < 10 ? "0" + seconds : seconds + "";
        display2.setText(hh + ":" + mm + ":" + ss);
    }

目标是当点击切换“START TIMER”时，TIMERS（chrononeter1 和 chronometer2）都应该启动，而当点击切换“STOP TIMER”时，只有 chronometer1 应该停止。 请指教！谢谢！

XML 看起来像这样：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity">

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:gravity="center"
    android:orientation="vertical">

    <Chronometer
        android:id="@+id/chronometer1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="74dp"
        android:fontFamily="sans-serif-light"
        android:format="00:00:00"
        android:textSize="48sp" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center"
        android:orientation="horizontal">

        <TextView
            android:id="@+id/contraction_text_view"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Time since last start timer:" />

        <Chronometer
            android:id="@+id/chronometer2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:fontFamily="sans-serif-light"
            android:format="00:00:00"
            android:textSize="12sp" />

    </LinearLayout>

    <ToggleButton
        android:id="@+id/toggleButton1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:fontFamily="sans-serif-medium"
        android:textOff="Start Timer"
        android:textOn="Stop Timer"

        />

</LinearLayout>

Answer 1

好的，一直在查看您的代码。你可以使用天文钟。 喜欢：

//Decalare and initialize timer1.
private Chronometer timer1;
timer1 = (Chronometer)v.findViewById(R.id.chronometer1);

//Declare and initialize timer2.  
private Chronometer timer2;
timer2 =(Chronometer)v.findViewById(R.id.chronometer2);

然后在您的切换按钮中启动它们：

@Override
public void run() {
    if (passTog.isChecked()) {
        //start chronometers
        timer1.start();
        timer2.start();
    }

然后当 passTog.isChecked() = false 时只调用 timer1.stop()。第二个计时器将继续。

换句话说，当您的切换被选中时，在两个计时器上调用 .start()，当您的切换未被选中时，只在一个计时器上调用 .stop()。

我没有看到“停止计时器”代码。