第一, 要實現發短信的功能,必須要用到android系統中發短信的權限,即在AndoridManifest.xml中添加如下內容
<uses-permissionandroid:name=”android.permission.SEND_SMS”/>
第二, 使用AlarmManager來實現一個倒計時的功能,當時間到時發送短 信。AlarmManager有兩個相似的用法:1.在指定時常時候執行某項操作。2.周期性的執行某項操作。AlarmManager對象需要配合Intent對象使用,可以定時開啟一個Activity,發送一個Broadcast,或者開啟一個Service。以下是核心代碼片段:
[java] <span style="font-size:16px;">AlarmManager aManager=(AlarmManager)getSystemService(Context.ALARM_SERVICE);
Intent intent=new Intent(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)
</span>
<span style="font-size:16px;">AlarmManager aManager=(AlarmManager)getSystemService(Context.ALARM_SERVICE);
Intent intent=new Intent(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)
</span>
第三, 實現時間的設定方式。1.可以直接使用AlarmManager對象的set方法來設定具體的鬧鐘時間。2.可以使用TImePicker的方式來設定時間,這種方式比較靈活。
第四, 新建一個AlarmReceiver類,來對鬧鐘進行響應。
1. 現在AndroidMainfest.xml裡添加Receiver的聲明
[html] <span style="font-size:16px;"><receiver
android:name=".AlarmReceiver"
android:label="@string/app_name">
<intent-filter>
<action android:name="AlarmReceiver" />
</intent-filter>
</receiver>
</span>
<span style="font-size:16px;"><receiver
android:name=".AlarmReceiver"
android:label="@string/app_name">
<intent-filter>
<action android:name="AlarmReceiver" />
</intent-filter>
</receiver>
</span>
在AlarmReceiver.java中實現對時間的獲取以及發送短信的功能。發送短信需要用到SmsManager類,利用類 SmsManager 發送信息, smsManager 為 SmsManager 一個默認的實例.
SmsManager smsManager =SmsManager.getDefault();它的方法如下
smsManager.sendTextMessage(destinationAddress,scAddress, text, sentIntent, deliveryIntent)
其中各個參數的含義如下
destinationAddress: 收件人號碼
scAddress: 短信中心服務號碼, 這裡設置為null
text: 發送內容
sentIntent: 發送短信結果狀態信號(是否成功發送),new 一個Intent , 操作系統接收到信號後將廣播這個Intent.此過程為異步.
deliveryIntent: 對方接收狀態信號(是否已成功接收).
最後附上詳細的代碼
[java] <span style="font-size:16px;">public class YoulainaozhongActivity extends Activity {
TextView onetextview;
TextView twotextview;
TextView threetextview;
Button onebutton;
Button twobutton;
Dialog dialog = null;
//新建日歷對象,用來設置鬧鐘時間
Calendar calendar = Calendar.getInstance();
private SharedPreferences sharedPreferences;
public void onCreate(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(new OnClickListener() {
@Override
public void onClick(View v) {
dialog();
}
});
twobutton=(Button) findViewById(R.id.twobutton);
twobutton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(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);
AlarmManager aManager=(AlarmManager)getSystemService(Context.ALARM_SERVICE);
Intent intent=new Intent(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);
}
public void dialog(){
View view=getLayoutInflater().inflate(R.layout.shijian, null);//
final TimePicker 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);
new AlertDialog.Builder(this)
.setTitle("設置")
.setView(view)
.setPositiveButton("確定", new DialogInterface.OnClickListener() {
public void onClick(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("您設置的時間為: "+timeStr);
twotextview.setText("您設置的號碼為: "+oneeditext.getText().toString());
threetextview.setText("您設置的內容為: "+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 extends BroadcastReceiver {
/**
* 通過廣播進行掃描,是否到達時間後再響起鬧鈴
* */
@Override
public void onReceive(Context context, Intent intent) {
SharedPreferences sharedPreferences = 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);// 小時與分,
String haoma = sharedPreferences.getString("haoma", null);
String neirong = sharedPreferences.getString("neirong", null);
if (time != null) {// 判斷是否為空,然後通過創建,
// MediaPlayer mediaPlayer = MediaPlayer.create(context, R.raw.a);
Toast.makeText(context, "短信已經發送成功", Toast.LENGTH_LONG).show();
// mediaPlayer.start();// 開始 ;
sendMsg(haoma, neirong);
}
}
private void sendMsg(String number, String message) {
SmsManager smsManager = SmsManager.getDefault();
smsManager.sendTextMessage(number, null, message, null, null);
}
}
</span>
<span style="font-size:16px;">public class YoulainaozhongActivity extends Activity {
TextView onetextview;
TextView twotextview;
TextView threetextview;
Button onebutton;
Button twobutton;
Dialog dialog = null;
//新建日歷對象,用來設置鬧鐘時間 www.aiwalls.com
Calendar calendar = Calendar.getInstance();
private SharedPreferences sharedPreferences;
public void onCreate(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(new OnClickListener() {
@Override
public void onClick(View v) {
dialog();
}
});
twobutton=(Button) findViewById(R.id.twobutton);
twobutton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(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);
AlarmManager aManager=(AlarmManager)getSystemService(Context.ALARM_SERVICE);
Intent intent=new Intent(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);
}
public void dialog(){
View view=getLayoutInflater().inflate(R.layout.shijian, null);//
final TimePicker 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);
new AlertDialog.Builder(this)
.setTitle("設置")
.setView(view)
.setPositiveButton("確定", new DialogInterface.OnClickListener() {
public void onClick(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("您設置的時間為: "+timeStr);
twotextview.setText("您設置的號碼為: "+oneeditext.getText().toString());
threetextview.setText("您設置的內容為: "+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 extends BroadcastReceiver {
/**
* 通過廣播進行掃描,是否到達時間後再響起鬧鈴
* */
@Override
public void onReceive(Context context, Intent intent) {
SharedPreferences sharedPreferences = 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);// 小時與分,
String haoma = sharedPreferences.getString("haoma", null);
String neirong = sharedPreferences.getString("neirong", null);
if (time != null) {// 判斷是否為空,然後通過創建,
// MediaPlayer mediaPlayer = MediaPlayer.create(context, R.raw.a);
Toast.makeText(context, "短信已經發送成功", Toast.LENGTH_LONG).show();
// mediaPlayer.start();// 開始 ;
sendMsg(haoma, neirong);
}
}
private void sendMsg(String number, String message) {
SmsManager smsManager = SmsManager.getDefault();
smsManager.sendTextMessage(number, null, message, null, null);
}
}
</span>
摘自 北京大學-Google Android實驗室