Chronometer简介
Chronometer和DigitalColok都继承与TextView,但是Chronometer不是显示的当前时间,而是从某个时间开始又过去了多少时间,是一个时间差。
Chronometer的属性
记时20秒的实例
package peng.liu.testview;
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 MainActivity extends Activity {
private Button strat;
private Chronometer chronometer;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
chronometer = (Chronometer) findViewById(R.id.chronometer);
strat = (Button) findViewById(R.id.start);
strat.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
chronometer.setBase(SystemClock.elapsedRealtime());
chronometer.start();
strat.setEnabled(false);
}
});
chronometer.setOnChronometerTickListener(new Chronometer.OnChronometerTickListener() {
@Override
public void onChronometerTick(Chronometer chronometer) {
if (SystemClock.elapsedRealtime()-chronometer.getBase()>20*1000){
chronometer.stop();
strat.setEnabled(true);
}
}
});
}
}
<LinearLayout 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:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
tools:context=".MainActivity"
android:orientation="vertical">
<Chronometer
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/chronometer"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/start"
android:text="start"/>
</LinearLayout>
时间: 2024-11-10 07:39:33