安卓源生实现计时器效果

来源：互联网发布：手机淘宝店如何装修编辑：程序博客网时间：2024/06/06 00:26
mport android.os.SystemClock;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.view.View;import android.widget.Chronometer;public class MainActivity extends AppCompatActivity {    private Chronometer chronometer = null;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        chronometer = (Chronometer) findViewById(R.id.chronometer);        chronometer.setFormat("计时：%s");    }    public void onStart(View view)    {        chronometer.start();    }    public void onStop(View view)    {        chronometer.stop();    }    public void onReset(View view)    {        chronometer.setBase(SystemClock.elapsedRealtime());    }}
<RelativeLayout    xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/activity_main"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context="com.shaoyidian.laizhan.selectortestdemo.MainActivity">    <Chronometer        android:id="@+id/chronometer"        android:layout_width="wrap_content"        android:layout_height="40dp"/>    <LinearLayout        android:layout_marginTop="30dp"        android:layout_width="wrap_content"        android:layout_height="wrap_content">        <Button            android:onClick="onStart"            android:text="开始计时"            android:layout_width="wrap_content"            android:layout_height="wrap_content"/>        <Button            android:onClick="onStop"            android:text="停止计时"            android:layout_width="wrap_content"            android:layout_height="wrap_content"/>        <Button            android:onClick="onReset"            android:text="重置"            android:layout_width="wrap_content"            android:layout_height="wrap_content"/>
    </LinearLayout></RelativeLayout>
0 0