切换按钮以启动Timer1和Timer2，但仅停止Timer1

Question

我试图说服Toggle按钮在单击“启动计时器”时启动Timer1和Timer2，并且仅停止Timer1，而使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); } 

目标是单击“ START TIMER”开关时，两个计时器（chrononeter1和chronometer2）都应启动，而单击“ STOP TIMER”开关时，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

好吧，一直在看你的代码。 您可以使用计时器。 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，仅调用timer1.stop（）。 第二计时器将继续。

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

我没有看到“停止计时器”代码。