代碼如下：
package com.easaa.adapter;
import java.util.Calendar;
import android.content.Context;
import android.database.ContentObserver;
import android.os.Handler;
import android.os.SystemClock;
import android.provider.Settings;
import android.text.Html;
import android.text.Spannable;
import android.text.Spanned;
import android.text.style.AbsoluteSizeSpan;
import android.util.AttributeSet;
import android.widget.DigitalClock;
public class MylockAdapter extends DigitalClock{
/**
* 要實現定時。得重寫Android系統的時鐘
* @author 明邦良
*/
Calendar mCalendar;//定義時間對象
private final static String m12="h:mm aa";//12時間制
private final static String m24="k:mm";//24小時時間制
private final static String stopTime="0天00時00分00秒";
private FormatChangeObserver mFormatChangeObserver;
private Runnable mTicker; //線程
private Handler mHandler;//消息機制
private long endTime;//結束時間
public static long distanceTime;//持續時間
private ClockListener mClockListener; //時鐘事件
private static boolean isFirst;//是否是第一次運行
private boolean mTickerStopped;//時間結束
private String mFormat;//字符串格式
public MylockAdapter(Context context){
super(context);//傳入上下文對象
initClock(context);//初始化時鐘
}
public MylockAdapter(Context context, AttributeSet attrs) {
super(context, attrs);//屬性
initClock(context);
}
private void initClock(Context context){
/**
* 首先判斷對象是否爲空。否則實例化
*/
if(mCalendar==null){
mCalendar = Calendar.getInstance();//實例化
}
mFormatChangeObserver = new FormatChangeObserver();
getContext().getContentResolver().registerContentObserver(
Settings.System.CONTENT_URI, true, mFormatChangeObserver);
setFormat();
}
//將時間顯示在這裏面
@Override
protected void onAttachedToWindow() {
mTickerStopped = false;//此時時間沒有停止
super.onAttachedToWindow();
mHandler = new Handler();//使用異步消息
mTicker=new Runnable(){
@Override
public void run() {
if(mTickerStopped)
return ;
long currentTime=System.currentTimeMillis();
if(currentTime/1000==endTime/1000-5*60){
mClockListener.remainFiveMinutes();
}
distanceTime = endTime - currentTime;
distanceTime /= 1000;
if (distanceTime == 0) {
setText(stopTime);
onDetachedFromWindow();
} else if (distanceTime < 0) {
setText(stopTime);
onDetachedFromWindow();
} else {
setText(dealTime(distanceTime));
}
invalidate();
long now = SystemClock.uptimeMillis();
long next = now + (1000 - now % 1000);
mHandler.postAtTime(mTicker, next);
}
};
mTicker.run();
}
/**
* 處理詳細的時間
*
* Spanned處理文本
*/
public static Spanned dealTime(long time) {
Spanned str;
StringBuffer returnString = new StringBuffer();
long day = time / (24 * 60 * 60);
long hours = (time % (24 * 60 * 60)) / (60 * 60);
long minutes = ((time % (24 * 60 * 60)) % (60 * 60)) / 60;
long second = ((time % (24 * 60 * 60)) % (60 * 60)) % 60;
String dayStr = String.valueOf(day);
String hoursStr = timeStrFormat(String.valueOf(hours));
String minutesStr = timeStrFormat(String.valueOf(minutes));
String secondStr = timeStrFormat(String.valueOf(second));
returnString.append(dayStr).append("天").append(hoursStr).append("小時")
.append(minutesStr).append("分鐘").append(secondStr).append("秒");
str = Html.fromHtml(returnString.toString());
if (day >= 10) {
((Spannable) str).setSpan(new AbsoluteSizeSpan(16), 2, 3,
Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
((Spannable) str).setSpan(new AbsoluteSizeSpan(16), 5, 7,
Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
((Spannable) str).setSpan(new AbsoluteSizeSpan(16), 9, 11,
Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
((Spannable) str).setSpan(new AbsoluteSizeSpan(16), 13, 14,
Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
} else {
((Spannable) str).setSpan(new AbsoluteSizeSpan(16), 1, 2,
Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
((Spannable) str).setSpan(new AbsoluteSizeSpan(16), 4, 6,
Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
((Spannable) str).setSpan(new AbsoluteSizeSpan(16), 8, 10,
Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
((Spannable) str).setSpan(new AbsoluteSizeSpan(16), 12, 13,
Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
}
// return returnString.toString();
return str;
}
//處理時間格式
private static String timeStrFormat(String timeStr){
switch(timeStr.length()){
case 1:
timeStr="0"+timeStr;
break;
}
return timeStr;
}
@Override
protected void onDetachedFromWindow() {
super.onDetachedFromWindow();
mTickerStopped = true;//時間停止
}
//設置結束時間
public void setEndTime(long endTime) {
this.endTime = endTime;
}
//24小時時間處理
private boolean get24HourMode() {
return android.text.format.DateFormat.is24HourFormat(getContext());
}
//設置格式
private void setFormat() {
if (get24HourMode()) {
mFormat = m24;
} else {
mFormat = m12;
}
}
/**
* ContentObserver——內容觀察者，目的是觀察(捕捉)特定Uri引起的數據庫的變化，繼而做一些相應的處理
* 重寫方法
*/
private class FormatChangeObserver extends ContentObserver{
public FormatChangeObserver() {
super(new Handler());
}
@Override
public void onChange(boolean selfChange) {
setFormat();
}
}
public void setClockListener(ClockListener clockListener){
this.mClockListener = clockListener;
}
public interface ClockListener {
void timeEnd();
void remainFiveMinutes();
}
}
2.自定義適配器顯示圖片
package com.easaa.adapter;
import java.io.BufferedInputStream;
import java.io.IOException;
import java.util.List;
import android.content.Context;
import android.content.res.AssetManager;
import android.graphics.BitmapFactory;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import com.easaa.demo.R;
import com.easaa.vo.ProductItem;
/**
* 自定義一個Adapter用來顯示數據
* @author 明邦良
*
*/
public class ProductAdapter extends BaseAdapter{
private Context mContext;//上下文
private List<ProductItem> mItems;//用於存放ProductItem對象
private LayoutInflater inflater;//佈局提取器
private BufferedInputStream bufferis;//一個緩存
private AssetManager assetManager;//爲了獲取Asset文件下的資源
public ProductAdapter(Context context, List<ProductItem> mItems) {
this.mContext = context;
this.mItems = mItems;
/**
* 初始化佈局提取器和AssetManager對象
*/
inflater=LayoutInflater.from(mContext);
assetManager=mContext.getAssets();
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return mItems.size();
}
@Override
public Object getItem(int arg0) {
// TODO Auto-generated method stub
return null;
}
@Override
public long getItemId(int arg0) {
// TODO Auto-generated method stub
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
/**
* 判斷convertView是否爲空,並提取佈局
*
*/
if(convertView==null){
convertView=inflater.inflate(R.layout.lock_time_sale_item, null);
}
ImageView imageView=(ImageView) convertView.findViewById(R.timeSale.image);
MylockAdapter mylockAdapter=(MylockAdapter) convertView.findViewById(R.timeSale.remainTime);
try {
bufferis=new BufferedInputStream(assetManager.open(mItems.get(position).getImageUrl()));
imageView.setImageBitmap(BitmapFactory.decodeStream(bufferis));
} catch (IOException e) {
e.printStackTrace();
}
mylockAdapter.setEndTime(mItems.get(position).getRemainTime());
mylockAdapter.setClockListener(new MylockAdapter.ClockListener() {
@Override
public void timeEnd() {
// TODO Auto-generated method stub
}
@Override
public void remainFiveMinutes() {
// TODO Auto-generated method stub
}
} );
return convertView;
}
}
Activity活動：
package com.easaa.demo;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.widget.ListView;
import com.easaa.adapter.ProductAdapter;
import com.easaa.vo.ProductItem;
/**
*使用適配器 將數據顯示在View中
* @author 明邦良
*
*/
public class MainActivity extends Activity {
private ListView listView;
private ProductAdapter productAdapter;
Random random=new Random();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.lock_time_sale);
initData();
}
private void initData(){
listView=(ListView) findViewById(R.timeSale.listView);
List<ProductItem> items=new ArrayList<ProductItem>();
ProductItem item = null;
for(int i=0;i<10;i++){
item=new ProductItem();
item.setId(System.currentTimeMillis()+30*1000*24*24);
item.setImageUrl("images/"+getImages()[random.nextInt(7)]);
item.setRemainTime(getRandomTime());
items.add(item);
}
productAdapter=new ProductAdapter(this,items);
listView.setAdapter(productAdapter);
}
//隨機取時間
private long getRandomTime(){
long curTime=System.currentTimeMillis();
long []t=new long[]{500,200,640,120,300,450,100,1000,1540,2500};//定義時間
return curTime+t[random.nextInt(9)]*1000;//在裏面隨機抽並*1000
}
//取圖片
private String [] getImages(){
String images[]=null;
try {
images=this.getApplicationContext().getAssets().list("images");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return images;
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
一個實體，用於裝數據
package com.easaa.vo;
public class ProductItem {
/**
* 一個實體
* 用於裝載圖片及時間
*/
private long id;
private String imageUrl;
private long remainTime;
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getImageUrl() {
return imageUrl;
}
public void setImageUrl(String imageUrl) {
this.imageUrl = imageUrl;
}
public long getRemainTime() {
return remainTime;
}
public void setRemainTime(long remainTime) {
this.remainTime = remainTime;
}
}
如圖：
源碼下載：http://download.csdn.net/detail/mxbhxx/5596357