andorid下实现定时发短信的功能

原文地址：http://blog.csdn.net/pku_android/article/details/7626147

第一，   要实现发短信的功能，必须要用到android系统中发短信的权限，即在AndoridManifest.xml中添加如下内容    

第二，   使用AlarmManager来实现一个倒计时的功能，当时间到时发送短   信。AlarmManager有两个相似的用法：1.在指定时常时候执行某项操作。2.周期性的执行某项操作。AlarmManager对象需要配合Intent对象使用，可以定时开启一个Activity，发送一个Broadcast，或者开启一个Service。以下是核心代码片段：

AlarmManageraManager=(AlarmManager)getSystemService(Context.ALARM_SERVICE);

 

              Intent intent=newIntent(this,AlarmReceiver.class);

              intent.setAction("AlarmReceiver");

 

              PendingIntent pendingIntent=PendingIntent.getBroadcast(this, 0,intent, 0);

              //aManager.set(AlarmManager.RTC,calendar.getTimeInMillis(), pendingIntent);

              aManager.setRepeating(AlarmManager.RTC, 0,60*1000, pendingIntent)

第三，   实现时间的设定方式。1.可以直接使用AlarmManager对象的set方法来设定具体的闹钟时间。2.可以使用TImePicker的方式来设定时间，这种方式比较灵活。

第四，   新建一个AlarmReceiver类，来对闹钟进行响应。

1.      现在AndroidMainfest.xml里添加Receiver的声明

<receiver

android:name=".AlarmReceiver"

            android:label="@string/app_name">

            <intent-filter>

                <action android:name="AlarmReceiver"/>          

            intent-filter>

        receiver>

在AlarmReceiver.java中实现对时间的获取以及发送短信的功能。发送短信需要用到SmsManager类，利用类 SmsManager 发送信息, smsManager 为 SmsManager 一个默认的实例.

SmsManager smsManager =SmsManager.getDefault();它的方法如下

smsManager.sendTextMessage(destinationAddress,scAddress, text, sentIntent, deliveryIntent)

其中各个参数的含义如下

　　destinationAddress: 收件人号码

　　scAddress: 短信中心服务号码, 这里设置为null

　　text: 发送内容

sentIntent: 发送短信结果状态信号(是否成功发送),new 一个Intent , 操作系统接收到信号后将广播这个Intent.此过程为异步.

　　deliveryIntent: 对方接收状态信号(是否已成功接收).

最后附上详细的代码

public class YoulainaozhongActivity extendsActivity {

       TextView onetextview;

       TextView twotextview; 

       TextView threetextview;      

       Button onebutton;

       Button twobutton;

       Dialog dialog = null;

       //新建日历对象，用来设置闹钟时间

       Calendar calendar =Calendar.getInstance();

       privateSharedPreferences sharedPreferences;

       public voidonCreate(Bundle savedInstanceState) {

              super.onCreate(savedInstanceState);

              setContentView(R.layout.main);

             

              calendar.setTimeInMillis(System.currentTimeMillis());

             

              LinearLayout relativeLayout  =(LinearLayout) findViewById(R.id.LinearLayout);

              relativeLayout.setBackgroundResource(R.drawable.bejing);

             

              onebutton=(Button)findViewById(R.id.onebutton);

              onebutton.setOnClickListener(newOnClickListener() {

                    

                     @Override

                     public voidonClick(View v) {

                    

                            dialog();

                     }

              });

              twobutton=(Button)findViewById(R.id.twobutton);

              twobutton.setOnClickListener(newOnClickListener() {

                    

                     @Override

                     public voidonClick(View v) {

                            finish();

                           

                     }

              });

              onetextview=(TextView)findViewById(R.id.onetextview);

              twotextview=(TextView)findViewById(R.id.twotextview);

              threetextview=(TextView)findViewById(R.id.threetextview);

              sharedPreferences=getSharedPreferences("alarm_record", Activity.MODE_PRIVATE);

              AlarmManageraManager=(AlarmManager)getSystemService(Context.ALARM_SERVICE);

 

              Intent intent=newIntent(this,AlarmReceiver.class);

              intent.setAction("AlarmReceiver");

 

              PendingIntentpendingIntent=PendingIntent.getBroadcast(this, 0,intent, 0);

//            aManager.set(AlarmManager.RTC,calendar.getTimeInMillis(), pendingIntent);

              aManager.setRepeating(AlarmManager.RTC, 0,60*1000, pendingIntent);

 

       }

       public voiddialog(){

              Viewview=getLayoutInflater().inflate(R.layout.shijian, null);//

 

              finalTimePicker timePicker=(TimePicker)view.findViewById(R.id.timepicker);

              final  EditText oneeditext=(EditText)view.findViewById(R.id.oneeditext);

              final  EditText twoeditext=(EditText)view.findViewById(R.id.twoeditext);

              timePicker.setIs24HourView(true);

 

              newAlertDialog.Builder(this)

              .setTitle("设置")

              .setView(view)

              .setPositiveButton("确定", newDialogInterface.OnClickListener() {

 

              public voidonClick(DialogInterface dialog, int which) {

 

              String timeStr=String.valueOf(timePicker.getCurrentHour())+":"+String.valueOf(timePicker.getCurrentMinute());

             

              /*calendar.set(Calendar.HOUR_OF_DAY,timePicker.getCurrentHour());

              calendar.set(Calendar.MINUTE,55);*/

             

              onetextview.setText("您设置的时间为: "+timeStr);

              twotextview.setText("您设置的号码为: "+oneeditext.getText().toString());

              threetextview.setText("您设置的内容为: "+twoeditext.getText().toString());

              sharedPreferences.edit().putString(timeStr, timeStr).commit();

              sharedPreferences.edit().putString("haoma", oneeditext.getText().toString()).commit();

              sharedPreferences.edit().putString("neirong", twoeditext.getText().toString()).commit();

 

 

              }

 

              }).setNegativeButton("取消", null).show();

 

       }

}

public class AlarmReceiver extendsBroadcastReceiver {

 

       /**

        * 通过广播进行扫描，是否到达时间后再响起闹铃

        **/

 

       @Override

       public voidonReceive(Context context, Intent intent) {

              SharedPreferencessharedPreferences = context.getSharedPreferences(

                            "alarm_record", Activity.MODE_PRIVATE);

 

              String hour = String.valueOf(Calendar.getInstance().get(

                            Calendar.HOUR_OF_DAY));

 

              String minute = String.valueOf(Calendar.getInstance().get(

                            Calendar.MINUTE));

 

              String time =sharedPreferences.getString(hour + ":" + minute, null);// 小时与分，

              String haoma =sharedPreferences.getString("haoma", null);

              String neirong =sharedPreferences.getString("neirong", null);

 

              if (time!= null) {// 判断是否为空，然后通过创建，

 

//                   MediaPlayer mediaPlayer =MediaPlayer.create(context, R.raw.a);

                     Toast.makeText(context,"短信已经发送成功",Toast.LENGTH_LONG).show();

//                   mediaPlayer.start();// 开始 ;

                     sendMsg(haoma, neirong);

              }

       }

 

       private voidsendMsg(String number, String message) {

              SmsManager smsManager =SmsManager.getDefault();

              smsManager.sendTextMessage(number,null, message, null, null);

 

       }

 

}