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  • 安卓定时器

    如图是效果图

    其中2个文本文件是获取当前的系统时间

    其中最关键的是计时器的代码设置

    如下是计时器的代码和布局文件

      1 package org.xml.demo.jishi;
  2 
  3 import java.util.Timer;
  4 import java.util.TimerTask;
  5 
  6 import ogg.huanxin.huadong.R;
  7 import android.content.Context;
  8 import android.os.Handler;
  9 import android.util.AttributeSet;
 10 import android.view.LayoutInflater;
 11 import android.view.View;
 12 import android.widget.LinearLayout;
 13 import android.widget.TextView;
 14 import android.widget.Toast;
 15 
 16 public class TimeView extends LinearLayout {
 17     // 小时的十位数
 18     private TextView tv_hour_decade;
 19     // 小时的个位数
 20     private TextView tv_hour_unit;
 21     // 分钟的十位数
 22     private TextView tv_min_decade;
 23     // 分钟的个位数
 24     private TextView tv_min_unit;
 25     // 秒的十位数
 26     private TextView tv_sec_decade;
 27     // 秒的个位数
 28     private TextView tv_sec_unit;
 29 
 30     private Context context;
 31     private int hour_decade;
 32     private int hour_unit;
 33     private int min_decade;
 34     private int min_unit;
 35     private int sec_decade;
 36     private int sec_unit;
 37 
 38     // 计时器
 39     private Timer timer;
 40     private Handler handler = new Handler() {
 41         public void handleMessage(android.os.Message msg) {
 42             countdown();
 43         }
 44 
 45     };
 46 
 47     public TimeView(Context context, AttributeSet attrs) {
 48         super(context, attrs);
 49         // TODO Auto-generated constructor stub
 50         this.context = context;
 51 
 52         LayoutInflater inflater = (LayoutInflater) context
 53                 .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
 54         View view = inflater.inflate(R.layout.jishidemo, this);
 55         tv_hour_decade = (TextView) view.findViewById(R.id.tv_hour_decade);
 56         tv_hour_unit = (TextView) view.findViewById(R.id.tv_hour_unit);
 57         tv_min_decade = (TextView) view.findViewById(R.id.tv_min_decade);
 58         tv_min_unit = (TextView) view.findViewById(R.id.tv_min_unit);
 59         tv_sec_decade = (TextView) view.findViewById(R.id.tv_sec_decade);
 60         tv_sec_unit = (TextView) view.findViewById(R.id.tv_sec_unit);
 61 
 62     }
 63 
 64     /**
 65      * 开始倒计时
 66      */
 67     public void start() {
 68         if (timer == null) {
 69             timer = new Timer();
 70             timer.schedule(new TimerTask() {
 71 
 72                 @Override
 73                 public void run() {
 74                     // TODO Auto-generated method stub
 75                     handler.sendEmptyMessage(0);
 76                 }
 77             }, 0, 1000);
 78         }
 79     }
 80 
 81     /**
 82      * 结束计时
 83      */
 84     public void stop() {
 85         if (timer != null) {
 86             timer.cancel();
 87             timer = null;
 88         }
 89     }
 90 
 91     /**
 92      * 设置时间的参数
 93      */
 94     public void setTime(int hour, int min, int sec) {
 95         if (hour >= 60 || min >= 60 || sec >= 60 || hour < 0 || min < 0
 96                 || sec < 0) {
 97             throw new RuntimeException("Time format is error");
 98         }
 99 
100         hour_decade = hour / 10;
101         hour_unit = hour - hour_decade * 10;
102 
103         min_decade = min / 10;
104         min_unit = min - min_decade * 10;
105 
106         sec_decade = sec / 10;
107         sec_unit = sec - sec_decade * 10;
108         tv_hour_decade.setText(hour_decade + "");
109         tv_hour_unit.setText(hour_unit + "");
110         tv_min_decade.setText(min_decade + "");
111         tv_min_unit.setText(min_unit + "");
112         tv_sec_decade.setText(sec_decade + "");
113         tv_sec_unit.setText(sec_unit + "");
114 
115     }
116 
117     /**
118      * 变化时间的十位数
119      * 
120      * @param tv
121      * @return boolean
122      */
123     private boolean isCarry4Decade(TextView tv) {
124         int time1 = Integer.valueOf(tv.getText().toString());
125         time1 = time1 - 1;
126         if (time1 < 0) {
127             time1 = 5;
128             tv.setText(time1 + "");
129             return true;
130         } else {
131             tv.setText(time1 + "");
132             return false;
133         }
134     }
135 
136     private boolean isCarry4Unit(TextView tv) {
137 
138         int time = Integer.valueOf(tv.getText().toString());
139         time = time - 1;
140         if (time < 0) {
141             time = 9;
142             tv.setText(time + "");
143             return true;
144         } else {
145             tv.setText(time + "");
146             return false;
147         }
148     }
149 
150     /**
151      * 倒计时
152      */
153     private void countdown() {
154         if (isCarry4Unit(tv_sec_unit)) {
155             if (isCarry4Decade(tv_sec_decade)) {
156 
157                 if (isCarry4Unit(tv_min_unit)) {
158                     if (isCarry4Decade(tv_min_decade)) {
159 
160                         if (isCarry4Unit(tv_hour_unit)) {
161                             if (isCarry4Decade(tv_hour_decade)) {
162                                 Toast.makeText(context, "时间到了",
163                                         Toast.LENGTH_SHORT).show();
164                                 stop();
165                             }
166                         }
167                     }
168                 }
169             }
170         }
171     }
172 }

    布局文件

    <?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:paddingLeft="10dp"
    android:paddingRight="10dp"
    android:background="#FCC0E9"
    android:orientation="horizontal" >

    <TextView
        android:id="@+id/tv_hour_decade"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:gravity="center"
        android:text="0"
        android:textColor="@android:color/white"
        android:textSize="15sp"
        android:textStyle="bold" />

    <TextView
        android:id="@+id/tv_hour_unit"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="1dp"
        android:layout_weight="1"
        android:gravity="center"
        android:text="0"
        android:textColor="@android:color/white"
        android:textSize="15sp"
        android:textStyle="bold" />

    <TextView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:gravity="center_horizontal|bottom"
        android:text="时"
        android:textColor="#ffffff"
        android:textSize="13sp" />
    <!--  -->

    <TextView
        android:id="@+id/tv_min_decade"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:gravity="center"
        android:text="0"
        android:textColor="@android:color/white"
        android:textSize="15sp"
        android:textStyle="bold" />

    <TextView
        android:id="@+id/tv_min_unit"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="1dp"
        android:layout_weight="1"
        android:gravity="center"
        android:text="0"
        android:textColor="@android:color/white"
        android:textSize="15sp"
        android:textStyle="bold" />

    <TextView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:gravity="center_horizontal|bottom"
        android:text="分"
        android:textColor="#ffffff"
        android:textSize="13sp" />
    <!--  -->

    <TextView
        android:id="@+id/tv_sec_decade"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:gravity="center"
        android:text="0"
        android:textColor="@android:color/white"
        android:textSize="15sp"
        android:textStyle="bold" />

    <TextView
        android:id="@+id/tv_sec_unit"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="1dp"
        android:layout_weight="1"
        android:gravity="center"
        android:text="0"
        android:textColor="@android:color/white"
        android:textSize="15sp"
        android:textStyle="bold" />

    <TextView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:gravity="center_horizontal|bottom"
        android:text="秒"
        android:textColor="#ffffff"
        android:textSize="13sp" />


</LinearLayout>
    View Code

    其中主代码文件

     1 package org.xml.demo.jishi;
 2 
 3 import java.text.SimpleDateFormat;
 4 import java.util.Calendar;
 5 import java.util.Date;
 6 
 7 import ogg.huanxin.huadong.R;
 8 import android.app.Activity;
 9 import android.os.Bundle;
10 import android.widget.TextView;
11 import android.widget.Toast;
12 
13 public class JiShi extends Activity {
14     private TimeView timeView;
15     private TextView tv_timeTextView;
16     private TextView tView;
17 
18     @Override
19     protected void onCreate(Bundle savedInstanceState) {
20         // TODO Auto-generated method stub
21         super.onCreate(savedInstanceState);
22         super.setContentView(R.layout.main_jishi);
23         timeView = (TimeView) super.findViewById(R.id.tv_myjishi);
24         tv_timeTextView = (TextView) super.findViewById(R.id.tv_shijian);
25         tView = (TextView) super.findViewById(R.id.tv_dangqianshijian);
26         // 设置时间
27         timeView.setTime(10, 0, 0);
28         // 计时开始
29         timeView.start();
30 
31         // 获取当前系统时间
32         Calendar calendar = Calendar.getInstance();
33         int year = calendar.get(Calendar.YEAR);// 获取年份
34         int month = calendar.get(Calendar.MONTH) + 1;// 获取月份
35         // int day = calendar.get(Calendar.DAY_OF_MONTH);//当前日期
36         int day = calendar.get(Calendar.DATE);// 当前日期
37         int hour = calendar.get(Calendar.HOUR_OF_DAY);// 当期时间
38         int min = Calendar.getInstance().get(Calendar.MINUTE);// 当前分钟
39         int sec = calendar.get(Calendar.SECOND);// 当前秒钟
40 
41         String s = "当前时间为：" + year + "年" + month + "月" + day + "日" + hour + "时"
42                 + min + "分" + sec + "秒";
43 
44         tv_timeTextView.setText(s);
45         Toast.makeText(this, s, Toast.LENGTH_LONG).show();
46 
47         SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
48         String string = df.format(new Date());
49         tView.setText(string);
50 
51     }
52 }
    View Code
     1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:layout_width="match_parent"
 4     android:layout_height="match_parent"
 5     android:background="#eee"
 6     android:orientation="vertical" >
 7 
 8     <TextView
 9         android:layout_width="wrap_content"
10         android:layout_height="wrap_content"
11         android:paddingLeft="10dp"
12         android:text="距商品开枪还有"
13         android:textColor="#030303"
14         android:textSize="20sp" />
15 
16     <View
17         android:layout_width="match_parent"
18         android:layout_height="1dp"
19         android:background="@android:color/white" />
20 
21     <org.xml.demo.jishi.TimeView
22         android:id="@+id/tv_myjishi"
23         android:layout_width="wrap_content"
24         android:layout_height="wrap_content"
25         android:paddingLeft="10dp" >
26     </org.xml.demo.jishi.TimeView>
27 
28     <TextView
29         android:id="@+id/tv_shijian"
30         android:layout_marginTop="10dp"
31         android:layout_width="match_parent"
32         android:layout_height="wrap_content" />
33 
34     <TextView
35         android:id="@+id/tv_dangqianshijian"
36         android:layout_marginTop="10dp"
37         android:layout_width="match_parent"
38         android:layout_height="wrap_content" />
39 
40 </LinearLayout>

     Date date = new Date();
                    DateFormat ddf = DateFormat.getDateInstance();
                    String day = ddf.format(date);
                    DateFormat ddy = DateFormat.getTimeInstance();
                    String timeString = ddy.format(date);
                    DateFormat ddty = DateFormat.getDateTimeInstance();
                    String shjian = ddty.format(date);
                    System.out.println(day + "----" + timeString + "--------"
                            + shjian);
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  • 原文地址：https://www.cnblogs.com/wangfengdange/p/4921171.html
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