Android实现闹钟小程序

2021-04-03 我要评论

最近写了个闹钟的程序，看到SharedPreferences在一个程序中可以共享数据，SharedPreferences是一个轻量级的键值存储机制，只可以存储基本数据类型。我就拿来用用，没想到SharedPreferences太好了，真是轻量级的保存数据的好的工具，比sqlite好用多了！以后我又多了一种编程思想了，呵呵，所以现在分享给大家，特别注意这点：这个无法直接在多个程序间共享Preferences数据。程序关闭再打开时间仍然保留你上次设置的时间。这就是Preferences的作用！

程序欢迎界面：

点击设置闹钟界面：

点击闹钟设置中的设置后的界面：

闹钟时间到了弹出dialog：

设置重复想起闹钟后的界面：

点击返回键弹出的提示：

下面请看代码：

一、MainActivity中的代码：

package com.cn.daming;
 
import java.util.Calendar;
 
import android.app.Activity;
import android.app.AlarmManager;
import android.app.AlertDialog;
import android.app.PendingIntent;
import android.app.TimePickerDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.TimePicker;
import android.widget.Toast;
 
public class MainActivity extends Activity {
 TextView setTime1;
 TextView setTime2;
 TextView setTime3;
 Button mButton1;
 Button mButton2;
 Button mButton3;
 Button mButton4;
 Button mButton5;
 Button mButton6;
 
 String time1String = null;
 String time2String = null;
 String time3String = null;
 String defalutString = "目前无设置";
 
 AlertDialog builder = null;
 Calendar c=Calendar.getInstance();
 
 @Override
 public void onCreate(Bundle savedInstanceState)
 {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);
   
  //取得活动的Preferences对象
  SharedPreferences settings = getPreferences(Activity.MODE_PRIVATE);
  time1String = settings.getString("TIME1", defalutString);
  time2String = settings.getString("TIME2", defalutString);
  time3String = settings.getString("TIME3", defalutString);
  
  InitButton1();
  InitButton2();
  InitButton3();
  InitButton4();
  InitButton5();
  InitButton6(); 
  
  setTime1.setText(time1String);
  setTime3.setText(time2String);
  setTime2.setText(time3String);
 }
 
 public void InitButton1()
 {
  setTime1=(TextView) findViewById(R.id.setTime1);
  mButton1=(Button)findViewById(R.id.mButton1);
  mButton1.setOnClickListener(new View.OnClickListener()
  {
   public void onClick(View v)
   {
   c.setTimeInMillis(System.currentTimeMillis());
   int mHour=c.get(Calendar.HOUR_OF_DAY);
   int mMinute=c.get(Calendar.MINUTE);
   
   
   new TimePickerDialog(MainActivity.this,
    new TimePickerDialog.OnTimeSetListener()
    {    
    public void onTimeSet(TimePicker view,int hourOfDay,
          int minute)
    {
     c.setTimeInMillis(System.currentTimeMillis());
     c.set(Calendar.HOUR_OF_DAY,hourOfDay);
     c.set(Calendar.MINUTE,minute);
     c.set(Calendar.SECOND,0);
     c.set(Calendar.MILLISECOND,0);
     
     Intent intent = new Intent(MainActivity.this, CallAlarm.class);
     PendingIntent sender=PendingIntent.getBroadcast(
     MainActivity.this,0, intent, 0);
     AlarmManager am;
     am = (AlarmManager)getSystemService(ALARM_SERVICE);
     am.set(AlarmManager.RTC_WAKEUP,
      c.getTimeInMillis(),
      sender
      );
     String tmpS=format(hourOfDay)+"："+format(minute);
     setTime1.setText(tmpS);
     
     //SharedPreferences保存数据，并提交
     SharedPreferences time1Share = getPreferences(0);
     SharedPreferences.Editor editor = time1Share.edit();
     editor.putString("TIME1", tmpS);
     editor.commit();
     
     Toast.makeText(MainActivity.this,"设置大明闹钟时间为"+tmpS,
     Toast.LENGTH_SHORT)
     .show();
    }   
    },mHour,mMinute,true).show();
   }
  });
 }
 
 public void InitButton2()
 {
  mButton2=(Button) findViewById(R.id.mButton2);
  mButton2.setOnClickListener(new View.OnClickListener()
  {
   public void onClick(View v)
   {
   Intent intent = new Intent(MainActivity.this, CallAlarm.class);
   PendingIntent sender=PendingIntent.getBroadcast(
    MainActivity.this,0, intent, 0);
   AlarmManager am;
   am =(AlarmManager)getSystemService(ALARM_SERVICE);
   am.cancel(sender);
   Toast.makeText(MainActivity.this,"大明闹钟时间删除",
       Toast.LENGTH_SHORT).show();
   setTime1.setText("目前无设置");
   
   SharedPreferences time1Share = getPreferences(0);
    SharedPreferences.Editor editor = time1Share.edit();
    editor.putString("TIME1", "目前无设置");
    editor.commit();
   }
  });
 }
 
 public void InitButton3()
 {
  setTime3=(TextView) findViewById(R.id.setTime5);
  mButton3=(Button)findViewById(R.id.mButton5);
  mButton3.setOnClickListener(new View.OnClickListener()
  {
   public void onClick(View v)
   {
   c.setTimeInMillis(System.currentTimeMillis());
   int mHour=c.get(Calendar.HOUR_OF_DAY);
   int mMinute=c.get(Calendar.MINUTE);
   
   
   new TimePickerDialog(MainActivity.this,
    new TimePickerDialog.OnTimeSetListener()
    {    
    public void onTimeSet(TimePicker view,int hourOfDay,
          int minute)
    {
     c.setTimeInMillis(System.currentTimeMillis());
     c.set(Calendar.HOUR_OF_DAY,hourOfDay);
     c.set(Calendar.MINUTE,minute);
     c.set(Calendar.SECOND,0);
     c.set(Calendar.MILLISECOND,0);
     
     Intent intent = new Intent(MainActivity.this, CallAlarm.class);
     PendingIntent sender=PendingIntent.getBroadcast(
     MainActivity.this,1, intent, 0);
     AlarmManager am;
     am = (AlarmManager)getSystemService(ALARM_SERVICE);
     am.set(AlarmManager.RTC_WAKEUP,
      c.getTimeInMillis(),
      sender
      );
     String tmpS=format(hourOfDay)+"："+format(minute);
     setTime3.setText(tmpS);
     
     //SharedPreferences保存数据，并提交
     SharedPreferences time2Share = getPreferences(1);
     SharedPreferences.Editor editor = time2Share.edit();
     editor.putString("TIME2", tmpS);
     editor.commit();
     
     Toast.makeText(MainActivity.this,"设置大明闹钟时间为"+tmpS,
     Toast.LENGTH_SHORT)
     .show();
    }   
    },mHour,mMinute,true).show();
   }
  });
 }
 
 public void InitButton4()
 {
  mButton4=(Button) findViewById(R.id.mButton6);
  mButton4.setOnClickListener(new View.OnClickListener()
  {
   public void onClick(View v)
   {
   Intent intent = new Intent(MainActivity.this, CallAlarm.class);
   PendingIntent sender=PendingIntent.getBroadcast(
    MainActivity.this,0, intent, 0);
   AlarmManager am;
   am =(AlarmManager)getSystemService(ALARM_SERVICE);
   am.cancel(sender);
   Toast.makeText(MainActivity.this,"大明闹钟时间删除",
       Toast.LENGTH_SHORT).show();
   setTime3.setText("目前无设置");
   
   //SharedPreferences保存数据，并提交
    SharedPreferences time2Share = getPreferences(1);
    SharedPreferences.Editor editor = time2Share.edit();
    editor.putString("TIME2", "目前无设置");
    editor.commit();
   }
  });
 }
 
 public void InitButton5()
 {
  setTime2=(TextView) findViewById(R.id.setTime2);
  LayoutInflater factory = LayoutInflater.from(this);
  final View setView = factory.inflate(R.layout.timeset,null);
  final TimePicker tPicker=(TimePicker)setView
         .findViewById(R.id.tPicker);
  tPicker.setIs24HourView(true);
 
  final AlertDialog di=new AlertDialog.Builder(MainActivity.this)
    .setIcon(R.drawable.clock)
    .setTitle("设置")
    .setView(setView)
    .setPositiveButton("确定",
    new DialogInterface.OnClickListener()
    {
    public void onClick(DialogInterface dialog, int which)
    {
     EditText ed=(EditText)setView.findViewById(R.id.mEdit);
     int times=Integer.parseInt(ed.getText().toString())
        *1000;
     c.setTimeInMillis(System.currentTimeMillis());
     c.set(Calendar.HOUR_OF_DAY,tPicker.getCurrentHour());
     c.set(Calendar.MINUTE,tPicker.getCurrentMinute());
     c.set(Calendar.SECOND,0);
     c.set(Calendar.MILLISECOND,0);
 
     Intent intent = new Intent(MainActivity.this,
            CallAlarm.class);
     PendingIntent sender = PendingIntent.getBroadcast(
     MainActivity.this,1, intent, 0);
     AlarmManager am;
     am = (AlarmManager)getSystemService(ALARM_SERVICE);
     am.setRepeating(AlarmManager.RTC_WAKEUP,
       c.getTimeInMillis(),times,sender);
     String tmpS=format(tPicker.getCurrentHour())+"："+
        format(tPicker.getCurrentMinute());
     String subStr = "设置大明闹钟时间为"+tmpS+
       "开始，重复间隔为"+times/1000+"秒";
     setTime2.setText("设置大明闹钟时间为"+tmpS+
         "开始，重复间隔为"+times/1000+"秒");
     
     //SharedPreferences保存数据，并提交 
     SharedPreferences time3Share = getPreferences(2);
    SharedPreferences.Editor editor = time3Share.edit();
    editor.putString("TIME3", subStr);
    editor.commit();
     
     Toast.makeText(MainActivity.this,"设置大明闹钟为"+tmpS+
         "开始，重复间隔为"+times/1000+"秒",
         Toast.LENGTH_SHORT).show();
    }
    })
    .setNegativeButton("取消",
    new DialogInterface.OnClickListener()
    {
    public void onClick(DialogInterface dialog, int which)
    {
    }
    }).create();
 
  mButton5=(Button) findViewById(R.id.mButton3);
  mButton5.setOnClickListener(new View.OnClickListener()
  {
   public void onClick(View v)
   {
   c.setTimeInMillis(System.currentTimeMillis());
   tPicker.setCurrentHour(c.get(Calendar.HOUR_OF_DAY));
   tPicker.setCurrentMinute(c.get(Calendar.MINUTE));
   di.show();
   }
  });
 }
 
 public void InitButton6()
 {
  mButton6=(Button) findViewById(R.id.mButton4);
  mButton6.setOnClickListener(new View.OnClickListener()
  {
   public void onClick(View v)
   {
   Intent intent = new Intent(MainActivity.this, CallAlarm.class);
   PendingIntent sender = PendingIntent.getBroadcast(
    MainActivity.this,1, intent, 0);
   AlarmManager am;
   am = (AlarmManager)getSystemService(ALARM_SERVICE);
   am.cancel(sender);
   Toast.makeText(MainActivity.this,"闹钟时间删除",
       Toast.LENGTH_SHORT).show();
   setTime2.setText("目前无设置");
   //SharedPreferences保存数据，并提交 
    SharedPreferences time3Share = getPreferences(2);
   SharedPreferences.Editor editor = time3Share.edit();
   editor.putString("TIME3", "目前无设置");
   editor.commit();
   }
  });
 }
  
 @Override
 public boolean onKeyUp(int keyCode, KeyEvent event) {
 
   if(keyCode == KeyEvent.KEYCODE_BACK){
 builder = new AlertDialog.Builder(MainActivity.this)
  .setIcon(R.drawable.clock)
  .setTitle("温馨提示：")
  .setMessage("您是否要退出大明闹钟程序!!!")
  .setPositiveButton("确定",
  new DialogInterface.OnClickListener() {
  public void onClick(DialogInterface dialog,
   int whichButton) {
   MainActivity.this.finish();
  }
  })
  .setNegativeButton("取消",
  new DialogInterface.OnClickListener() {
  public void onClick(DialogInterface dialog,
   int whichButton) {
   builder.dismiss();
  }
  }).show();
   }
   return true;
 }
 
 private String format(int x)
 {
  String s=""+x;
  if(s.length()==1) s="0"+s;
  return s;
 }
}

二、CallAlarm中的代码：

package com.cn.daming;
 
import android.content.Context;
import android.content.Intent;
import android.content.BroadcastReceiver;
import android.os.Bundle;
 
public class CallAlarm extends BroadcastReceiver
{
 @Override
 public void onReceive(Context context, Intent intent)
 {
 Intent i = new Intent(context, AlarmAlert.class);
  
 Bundle bundleRet = new Bundle();
 bundleRet.putString("STR_CALLER", "");
 i.putExtras(bundleRet);
 i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 context.startActivity(i);
 }
}

三、AlarmAlert中的代码：

package com.cn.daming;
 
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.Bundle;
 
public class AlarmAlert extends Activity
{
 @Override
 protected void onCreate(Bundle savedInstanceState) 
 {
 super.onCreate(savedInstanceState);
 new AlertDialog.Builder(AlarmAlert.this)
  .setIcon(R.drawable.clock)
  .setTitle("大明闹钟响了!!")
  .setMessage("快完成你制定的计划吧!!!")
  .setPositiveButton("关掉它",
   new DialogInterface.OnClickListener()
  {
   public void onClick(DialogInterface dialog, int whichButton)
   {
   AlarmAlert.this.finish();
   }
  })
  .show();
 } 
}

四、main.xml布局文件的代码：

<?xml version="1.0" encoding="utf-8"?>
<AbsoluteLayout
 xmlns:android="http://schemas.android.com/apk/res/android"
 android:id="@+id/layout1"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent"
 android:background="@drawable/other"
>
 <DigitalClock
 android:id="@+id/dClock"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:textSize="40sp"
 android:textColor="@drawable/blue"
 android:layout_x="70px"
 android:layout_y="32px"
 >
 </DigitalClock>
 <TextView
  android:id="@+id/text1"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:text="@string/str_title3"
  android:textSize="20sp"
  android:textColor="@drawable/black"
  android:layout_x="10px"
  android:layout_y="104px"
 >
 </TextView>
 <Button
  android:id="@+id/mButton1"
  android:layout_width="wrap_content"
  android:layout_height="40px"
  android:text="@string/str_button1"
  android:textColor="@drawable/black"
  android:textSize="18sp"
  android:layout_x="190px"
  android:layout_y="102px"
 >
  </Button>
  
  <TextView
  android:id="@+id/setTime1"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:text="@string/str_default"
  android:textColor="@drawable/red"
  android:textSize="16sp"
  android:layout_x="10px"
  android:layout_y="149px"
 >
 </TextView>
 <Button
  android:id="@+id/mButton2"
  android:layout_width="wrap_content"
  android:layout_height="40px"
  android:text="@string/str_button2"
  android:textColor="@drawable/black"
  android:textSize="18sp"
  android:layout_x="190px"
  android:layout_y="142px"
 >
 </Button>
 
 <TextView
  android:id="@+id/text5"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:text="@string/str_title4"
  android:textSize="20sp"
  android:textColor="@drawable/black"
  android:layout_x="10px"
  android:layout_y="216px"
 >
 </TextView>
 <Button
  android:id="@+id/mButton5"
  android:layout_width="wrap_content"
  android:layout_height="40px"
  android:text="@string/str_button1"
  android:textColor="@drawable/black"
  android:textSize="18sp"
  android:layout_x="190px"
  android:layout_y="212px"
 >
  </Button>
  
  <TextView
  android:id="@+id/setTime5"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:text="@string/str_default"
  android:textColor="@drawable/red"
  android:textSize="16sp"
  android:layout_x="10px"
  android:layout_y="259px"
 >
 </TextView>
 <Button
  android:id="@+id/mButton6"
  android:layout_width="wrap_content"
  android:layout_height="40px"
  android:text="@string/str_button2"
  android:textColor="@drawable/black"
  android:textSize="18sp"
  android:layout_x="190px"
  android:layout_y="252px"
 >
 </Button>
 
 <TextView
  android:id="@+id/text2"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:text="@string/str_title2"
  android:textSize="20sp"
  android:textColor="@drawable/black"
  android:layout_x="10px"
  android:layout_y="326px"
 >
 </TextView>
 <Button
  android:id="@+id/mButton3"
  android:layout_width="wrap_content"
  android:layout_height="40px"
  android:text="@string/str_button1"
  android:textColor="@drawable/black"
  android:textSize="18sp"
  android:layout_x="190px"
  android:layout_y="322px"
 >
 </Button>
 
 <TextView
  android:id="@+id/setTime2"
  android:layout_width="170px"
  android:layout_height="wrap_content"
  android:text="@string/str_default"
  android:textColor="@drawable/red"
  android:textSize="16sp"
  android:layout_x="10px"
  android:layout_y="369px"
 >
  </TextView>
 <Button
  android:id="@+id/mButton4"
  android:layout_width="wrap_content"
  android:layout_height="40px"
  android:text="@string/str_button2"
  android:textColor="@drawable/black"
  android:textSize="18sp"
  android:layout_x="190px"
  android:layout_y="362px"
 >
 </Button>
 
</AbsoluteLayout>

五、timeset.xml布局文件中的代码：

<?xml version="1.0" encoding="utf-8"?>
<AbsoluteLayout
 android:id="@+id/layout2"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent"
 xmlns:android="http://schemas.android.com/apk/res/android"
>
 <TextView
 android:id="@+id/text1"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:text="@string/str_text1"
 android:textColor="@drawable/white"
 android:textSize="16sp"
 android:layout_x="10px"
 android:layout_y="32px"
 >
 </TextView>
 <TextView
 android:id="@+id/text2"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:text="@string/str_text2"
 android:textColor="@drawable/white"
 android:textSize="16sp"
 android:layout_x="10px"
 android:layout_y="172px"
 >
 </TextView>
 <TimePicker
 android:id="@+id/tPicker"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_x="100px"
 android:layout_y="12px"
 >
 </TimePicker>
 <EditText
 android:id="@+id/mEdit"
 android:layout_width="52px"
 android:layout_height="40px"
 android:text="15"
 android:textSize="16sp"
 android:layout_x="120px"
 android:layout_y="162px"
 >
 </EditText>
 <TextView
 android:id="@+id/text3"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:text="@string/str_text3"
 android:textColor="@drawable/white"
 android:textSize="16sp"
 android:layout_x="180px"
 android:layout_y="172px"
 >
 </TextView>
</AbsoluteLayout>

六、string.xml中的代码：

<?xml version="1.0" encoding="utf-8"?>
<resources>
 <string name="hello">Hello World, EX06_10</string>
 <string name="app_name">大明原创闹钟</string>
 <string name="str_button1">设置闹钟</string>
 <string name="str_button2">删除闹钟</string>
 <string name="str_title2">重复响起的闹钟</string>
 <string name="str_title3">大明闹钟一</string>
 <string name="str_title4">大明闹钟二</string>
 <string name="str_default">目前无设置</string>
 <string name="str_text1">开始时间</string>
 <string name="str_text2">重复响起的闹钟</string>
 <string name="str_text3">秒</string>
</resources>

七、color.xml中的代码：

<?xml version="1.0" encoding="utf-8"?>
<resources>
 <drawable name="white">#FFFFFFFF</drawable>
 <drawable name="other">#FF00FFF0</drawable>
 <drawable name="black">#000000</drawable>
 <drawable name="blue">#0000FF</drawable>
 <drawable name="red">#FF0000</drawable>
</resources>

八、AndroidManifest.xml中的代码

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
  package="com.cn.daming"
  android:versionCode="1"
  android:versionName="1.0">
 <uses-sdk android:minSdkVersion="8" />
 
 <application android:icon="@drawable/icon" android:label="@string/app_name">
  <!-- 註冊receiver CallAlarm -->
  <receiver android:name=".CallAlarm" android:process=":remote" />
  <activity android:name=".MainActivity"
     android:label="@string/app_name">
   <intent-filter>
    <action android:name="android.intent.action.MAIN" />
    <category android:name="android.intent.category.LAUNCHER" />
   </intent-filter>
  </activity>
  <activity android:name=".AlarmAlert"
    android:label="@string/app_name">
  </activity>
 </application>
</manifest>

Android实现闹钟小程序

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