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我使用自定义列表视图适配器创建了自定义ListView。我想在列表中的每个列表项中设置当前时间。列表框中的项目必须每秒更新当前时间。在Android中使用线程的自定义ListView项目
MainActivity.java
package com.example.examapp;
import java.sql.Time;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;
import java.util.Locale;
import com.example.exambp.*;
import android.R.string;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.content.pm.LabeledIntent;
import android.content.res.Configuration;
import android.database.sqlite.SQLiteDatabase;
import android.text.format.DateFormat;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.TextView;
public class MainActivity extends Activity {
ListView lv;
Activity act=this;
List<ListViewItem> items;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
items=new ArrayList<ListViewItem>();
lv=(ListView)findViewById(R.id.listView1);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
}
public void showData(View v)
{
IntentIntegrator i=new IntentIntegrator(this);
i.initiateScan();
}
String[] onedata;
public void onActivityResult(int requestCode, int resultCode, Intent intent) {
IntentResult scanResult = IntentIntegrator.parseActivityResult(requestCode, resultCode, intent);
if (scanResult != null) {
String x=scanResult.getContents();
EditText et=(EditText)findViewById(R.id.editText1);
et.setText(x);
addToList(x);
}
}
ListViewItem li;
CustomListViewAdapter adapter;
public void addToList(String str)
{
onedata=str.split("/");
li=new ListViewItem();
li.enrollId="EnrollmentID: "+onedata[0].toString();
li.ExamId="ExamID: "+onedata[1].toString();
li.UserId="UserId: "+onedata[2].toString();
li.StartedTime=onedata[3].toString();
li.Duration=onedata[4].toString();
li.AvailableTime="jiukjh";
items.add(li);
adapter=new CustomListViewAdapter(this, items);
lv.setAdapter(adapter);
}
}
activity_main.xml中
<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"
tools:context=".MainActivity" >
<EditText
android:id="@+id/editText1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_marginLeft="60dp"
android:ems="10"
android:inputType="text" >
<requestFocus />
</EditText>
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:onClick="showData"
android:text="@string/btn_val" />
<LinearLayout
android:id="@+id/linearLayout2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:orientation="vertical" >
</LinearLayout>
<ListView
android:id="@+id/listView1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/textView9"
android:layout_toRightOf="@+id/linearLayout2" >
</ListView>
<TextView
android:id="@+id/textView9"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/button1"
android:text="Started Exams"
android:textAppearance="?android:attr/textAppearanceLarge" />
</RelativeLayout>
item_row.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TextView
android:id="@+id/txtAvailability"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:text="TextView"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="@+id/txtEnrollmentId"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/txtAvailability"
android:text="TextView" />
<TextView
android:id="@+id/txtUserId"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/txtEnrollmentId"
android:layout_alignBottom="@+id/txtEnrollmentId"
android:layout_marginLeft="78dp"
android:layout_toRightOf="@+id/txtAvailability"
android:text="TextView" />
<TextView
android:id="@+id/txtExamId"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/txtEnrollmentId"
android:text="TextView" />
<TextView
android:id="@+id/txtStartTime"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/txtExamId"
android:layout_alignBottom="@+id/txtExamId"
android:layout_alignLeft="@+id/txtUserId"
android:text="TextView" />
</RelativeLayout>
CustomListViewAdapter.java
package com.example.examapp;
import java.util.Date;
import java.util.List;
import com.example.exambp.*;
import android.app.Activity;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
public class CustomListViewAdapter extends BaseAdapter
{
LayoutInflater inflater;
List<ListViewItem> items;
Activity act;
public CustomListViewAdapter(Activity context, List<ListViewItem> items) {
super();
this.items = items;
this.inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
this.act=context;
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return items.size();
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return null;
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}
View vi;
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
ListViewItem item=items.get(position);
vi=convertView;
if(convertView==null)
vi = inflater.inflate(R.layout.item_row, null);
//ImageView imgThumbnail=(ImageView)vi.findViewById(R.id.imgThumbnail);
TextView txtAvailableTime1=(TextView)vi.findViewById(R.id.txtAvailability);
TextView txtEnrollmentId1=(TextView)vi.findViewById(R.id.txtEnrollmentId);
TextView txtUserId1=(TextView)vi.findViewById(R.id.txtUserId);
TextView txtExamId1=(TextView)vi.findViewById(R.id.txtExamId);
TextView txtStartedTime1=(TextView)vi.findViewById(R.id.txtStartTime);
//imgThumbnail.setImageResource(item.ThumbnailResource);
txtAvailableTime1.setText(item.AvailableTime.toString());
txtEnrollmentId1.setText(item.enrollId.toString());
txtUserId1.setText(item.UserId.toString());
txtExamId1.setText(item.ExamId.toString());
txtStartedTime1.setText(item.StartedTime.toString());
Thread myThread = null;
Runnable runnable = new CountDownRunner();
myThread= new Thread(runnable);
myThread.start();
return vi;
}
public void doWork() {
act.runOnUiThread(new Runnable() {
public void run() {
try{
TextView txtCurrentTime=(TextView)vi.findViewById(R.id.txtAvailability);
Date dt = new Date();
int hours = dt.getHours();
int minutes = dt.getMinutes();
int seconds = dt.getSeconds();
String curTime = hours + ":" + minutes + ":" + seconds;
txtCurrentTime.setText(curTime);
}catch (Exception e) {
//TextView txtCurrentTime=(TextView)vi.findViewById(R.id.txtAvailability);
//txtCurrentTime.setText(e.getMessage());
}
}
});
}
class CountDownRunner implements Runnable{
// @Override
public void run() {
while(true){
try {
doWork();
Thread.sleep(1000);
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
}catch(Exception e){
}
}
}
}
}
这只在一次运行。我想不断更改列表项目中的当前时间。