You can give it a start time in the elapsedRealtime() timebase, and it counts up from that, or if you don't give it a base time, it will use the time at which you call start(). By default it will display the current timer value in the form "MM:SS" or "H:MM:SS", or you can use setFormat(String) to format the timer value into an arbitrary string.
main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello"
/>
<Chronometer
android:id="@+id/chronometer"
android:layout_gravity="center_horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
<Button
android:id="@+id/buttonstart"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Start"
/>
<Button
android:id="@+id/buttonstop"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Stop"
/>
<Button
android:id="@+id/buttonreset"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Reset"
/>
</LinearLayout>
AndroidChronometer.java
package com.exercise.AndroidChronometer;
import android.app.Activity;
import android.os.Bundle;
import android.os.SystemClock;
import android.view.View;
import android.widget.Button;
import android.widget.Chronometer;
public class AndroidChronometer extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
final Chronometer myChronometer = (Chronometer)findViewById(R.id.chronometer);
Button buttonStart = (Button)findViewById(R.id.buttonstart);
Button buttonStop = (Button)findViewById(R.id.buttonstop);
Button buttonReset = (Button)findViewById(R.id.buttonreset);
buttonStart.setOnClickListener(new Button.OnClickListener(){
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
myChronometer.start();
}});
buttonStop.setOnClickListener(new Button.OnClickListener(){
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
myChronometer.stop();
}});
buttonReset.setOnClickListener(new Button.OnClickListener(){
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
myChronometer.setBase(SystemClock.elapsedRealtime());
}});
}
}
Download the files.
related article: Chronometer.OnChronometerTickListener()
