Chronometer、ListView

activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical" >    <Chronometer        android:id="@+id/chronometer"        android:layout_width="wrap_content"        android:layout_height="wrap_content" />    <LinearLayout        android:layout_width="match_parent"        android:layout_height="match_parent"        android:orientation="horizontal" >        <Button            android:id="@+id/start"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="开始计时" />        <Button            android:id="@+id/stop"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="停止计时" />    <!--ListView方法一  不用在java类中进行操作-->        <ListView            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:divider="#000000"            android:dividerHeight="2dp"            android:entries="@array/liststring" >        </ListView>    </LinearLayout></LinearLayout>

shipin_array.xml

<?xml version="1.0" encoding="utf-8"?><resources>    <string-array name="liststring">        <item>测试一</item>        <item>测试二</item>        <item>测试三</item>        <item>测试四</item>    </string-array></resources>

MainActivity.java

import android.app.Activity;import android.os.Bundle;import android.os.SystemClock;import android.view.View;import android.view.View.OnClickListener;import android.widget.ArrayAdapter;import android.widget.Button;import android.widget.Chronometer;import android.widget.ListView;public class MainActivity extends Activity implements OnClickListener{    private Chronometer chronometer;    private Button start;    private Button stop;    private ListView listview2;    private String data[]={"sss","aaa"};    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        chronometer=(Chronometer) findViewById(R.id.chronometer);        start=(Button) findViewById(R.id.start);        stop=(Button) findViewById(R.id.stop);        start.setOnClickListener(this);        stop.setOnClickListener(this);        //listview方法二        listview2=new ListView(this);        listview2.setAdapter(new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_expandable_list_item_1,data));        setContentView(listview2);    }    @Override    public void onClick(View v) {        switch (v.getId()) {        case R.id.start:            //重置时间            chronometer.setBase(SystemClock.elapsedRealtime());            chronometer.start();            //start设置为不可用            start.setEnabled(false);            break;        case R.id.stop:            chronometer.stop();            //stop设置为可用            start.setEnabled(true);            break;        default:            break;        }    }}

Chronometer和listview方法一效果：

listview方法二效果：