Java 如何在Android中使用BroadcastReceiver发送电子邮件？
我正在尝试创建alarm manager，以便为我的应用程序中的特定日期发送电子邮件。我使用BroadcastReceiver在特定日期和时间发送电子邮件。我希望当用户单击我的应用程序“发送”按钮时，它应该在特定日期和时间发送电子邮件。有人能帮我吗。这是紧急的。谢谢 这是我的活动代码Java 如何在Android中使用BroadcastReceiver发送电子邮件？,java,android,email,alarmmanager,Java,Android,Email,Alarmmanager,我正在尝试创建alarm manager，以便为我的应用程序中的特定日期发送电子邮件。我使用BroadcastReceiver在特定日期和时间发送电子邮件。我希望当用户单击我的应用程序“发送”按钮时，它应该在特定日期和时间发送电子邮件。有人能帮我吗。这是紧急的。谢谢 这是我的活动代码 public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); s
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.form_details);
etServiceName = (EditText)findViewById(R.id.editText_ServiceName);
etSupplierName = (EditText)findViewById(R.id.editText_SupplierName);
etEmailId = (EditText)findViewById(R.id.Edittext_EmailId);
etReplacementDate = (EditText)findViewById(R.id.EditText_ReplacementDate);
etInterval_Days = (EditText)findViewById(R.id.EditText_IntervalDays);
etNextReplanishmentDate = (EditText)findViewById(R.id.Next_Replanishment_Date);
// Get current date by calender
final Calendar c = Calendar.getInstance();
year = c.get(Calendar.YEAR);
month = c.get(Calendar.MONTH);
day = c.get(Calendar.DAY_OF_MONTH);
etReplacementDate.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
showDialog(DATE_OF_REPLACEMENT);
}
});
etInterval_Days.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
// TODO Auto-generated method stub
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
// TODO Auto-generated method stub
}
@Override
public void afterTextChanged(Editable editable)
{
// TODO Auto-generated method stub
String fixedDate = etReplacementDate.getText().toString().trim();
SimpleDateFormat dateFormat1 = new SimpleDateFormat( "dd-MM-yyyy" );
Calendar cal = Calendar.getInstance();
try
{
cal.setTime( dateFormat1.parse( fixedDate ) );
}
catch (ParseException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
String strNumDays = etInterval_Days.getText().toString().trim();
if(strNumDays.trim().length()>0)
{
try
{
intConvertDays =Integer.valueOf(strNumDays);
}
catch(NumberFormatException ne)
{
System.out.println("could not parse :: " +ne);
}
}
cal.add( Calendar.DATE, intConvertDays );
Date dated = cal.getTime();
String beforDate_String = new SimpleDateFormat("dd-MM-yyyy").format(dated);
System.out.println("beforDate_String: " + beforDate_String);
etNextReplanishmentDate.setText(beforDate_String);
cal.add( Calendar.DATE, -2 );
Date minusDate = cal.getTime();
strMinusDate = new SimpleDateFormat("dd-MM-yyyy").format(minusDate);
System.out.println("String strMinusDate : " + strMinusDate);
if(strMinusDate.trim().length()>0)
{
try
{
IntMinusDate =Integer.valueOf(strMinusDate);
System.out.println(" IntMinusDate = " + IntMinusDate);
}
catch(NumberFormatException ne)
{
System.out.println("could not parse :: " +ne);
}
}
}
});
Intent intentAlarm = new Intent(Xyz.this, EmailSendTask.class);
// create the object
final AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
final PendingIntent pIntent = PendingIntent.getBroadcast(this,(int) IntMinusDate, intentAlarm, PendingIntent.FLAG_UPDATE_CURRENT);
btnSubmit = (Button) findViewById(R.id.buttonSubmit);
btnSubmit.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
strEmail= etEmailId.getText().toString().trim();
strServiceName = etServiceName.getText().toString().trim();
strSuppliername= etSupplierName.getText().toString().trim();
strReplacementDate= etReplacementDate.getText().toString().trim();
strIntervalDays= etInterval_Days.getText().toString().trim();
strNextReplacementDate = etNextReplanishmentDate.getText().toString().trim();
System.out.println("Data :- " + strServiceName +","+ strSuppliername +","+ strEmail +","+ strReplacementDate +","+ strIntervalDays + "," + strNextReplacementDate);
SharedPreferences sharedPref =getSharedPreferences("MyPref_Email", 0);
SharedPreferences.Editor editor1 = sharedPref.edit();
editor1.putString("ServiceName", strServiceName);
editor1.putString("Suppliername", strSuppliername);
editor1.putString("Email", strEmail);
editor1.putString("ReplacementDate", strReplacementDate);
editor1.putString("IntervalDays", strIntervalDays);
editor1.putString("NextReplacementDate", strNextReplacementDate);
editor1.commit();
Log.e("Commit is Complit", "Save");
//sendEmail();
System.out.println("Email Has To Be Sent Successfully");
databaseHelper.insertServicenDetails(strServiceName, strSuppliername, strEmail, strReplacementDate, strIntervalDays, strNextReplacementDate);
System.out.println("Data Has Been Save Successfully");
//set the alarm for particular time
alarmManager.set(AlarmManager.RTC_WAKEUP,IntMinusDate, pIntent);
System.out.println("set the alarm for particular time : ");
}
});
}
public class EmailSendTask extends BroadcastReceiver
{
String strServiceName;
String strSuppliername;
String strEmail;
String strReplacementDate;
String strIntervalDays;
String strNextReplacementDate;
@Override
public void onReceive(Context context, Intent arg1)
{
// TODO Auto-generated method stub
SharedPreferences prefs = context.getSharedPreferences("MyPref_CellNumber",
Context.MODE_PRIVATE);
SharedPreferences.Editor editor1 = prefs.edit();
strServiceName=prefs.getString("ServiceName" , "a\n");
strSuppliername=prefs.getString("Suppliername" , "a\n");
strEmail=prefs.getString("Email" , "a\n");
strReplacementDate=prefs.getString("ReplacementDate" , "a\n");
strIntervalDays=prefs.getString("IntervalDays" , "a\n");
strNextReplacementDate=prefs.getString("NextReplacementDate" , "a\n");
Log.e("ON CREATE" , "=" + strServiceName);
Log.e("ON CREATE" , "=" + strSuppliername);
Log.e("ON CREATE" , "=" + strEmail);
Log.e("ON CREATE" , "=" + strReplacementDate);
Log.e("ON CREATE" , "=" + strIntervalDays);
Log.e("ON CREATE" , "=" + strNextReplacementDate);
String subject = strServiceName;
String body = strServiceName+","
+strSuppliername+","
+strReplacementDate+","
+strIntervalDays+","
+strNextReplacementDate;
Log.e("body " , " = " + body);
Intent i = new Intent(Intent.ACTION_SEND);
i.setType("message/rfc822");
i.putExtra(Intent.EXTRA_EMAIL , new String[]{strEmail});
i.putExtra(Intent.EXTRA_SUBJECT, subject);
i.putExtra(Intent.EXTRA_TEXT , body);
i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
try
{
context.startActivity(Intent.createChooser(i, "Send mail...in Service Background"));
}
catch (android.content.ActivityNotFoundException ex)
{
Toast.makeText(context, "There are no email clients installed.", Toast.LENGTH_SHORT).show();
}
}
}
08-19 11:39:13.797: E/AndroidRuntime(485): FATAL EXCEPTION: main
08-19 11:39:13.797: E/AndroidRuntime(485): java.lang.RuntimeException: Unable to start receiver com.demo.EmailSendTask: android.util.AndroidRuntimeException: Calling startActivity() from outside of an Activity context requires the FLAG_ACTIVITY_NEW_TASK flag. Is this really what you want?
08-19 11:39:13.797: E/AndroidRuntime(485): at android.app.ActivityThread.handleReceiver(ActivityThread.java:1805)
08-19 11:39:13.797: E/AndroidRuntime(485): at android.app.ActivityThread.access$2400(ActivityThread.java:117)
08-19 11:39:13.797: E/AndroidRuntime(485): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:981)
08-19 11:39:13.797: E/AndroidRuntime(485): at android.os.Handler.dispatchMessage(Handler.java:99)
08-19 11:39:13.797: E/AndroidRuntime(485): at android.os.Looper.loop(Looper.java:123)
08-19 11:39:13.797: E/AndroidRuntime(485): at android.app.ActivityThread.main(ActivityThread.java:3683)
08-19 11:39:13.797: E/AndroidRuntime(485): at java.lang.reflect.Method.invokeNative(Native Method)
08-19 11:39:13.797: E/AndroidRuntime(485): at java.lang.reflect.Method.invoke(Method.java:507)
08-19 11:39:13.797: E/AndroidRuntime(485): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
08-19 11:39:13.797: E/AndroidRuntime(485): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
08-19 11:39:13.797: E/AndroidRuntime(485): at dalvik.system.NativeStart.main(Native Method)
08-19 11:39:13.797: E/AndroidRuntime(485): Caused by: android.util.AndroidRuntimeException: Calling startActivity() from outside of an Activity context requires the FLAG_ACTIVITY_NEW_TASK flag. Is this really what you want?
08-19 11:39:13.797: E/AndroidRuntime(485): at android.app.ContextImpl.startActivity(ContextImpl.java:621)
08-19 11:39:13.797: E/AndroidRuntime(485): at android.content.ContextWrapper.startActivity(ContextWrapper.java:258)
08-19 11:39:13.797: E/AndroidRuntime(485): at android.content.ContextWrapper.startActivity(ContextWrapper.java:258)
08-19 11:39:13.797: E/AndroidRuntime(485): at com.demo.EmailSendTask.onReceive(EmailSendTask.java:63)
08-19 11:39:13.797: E/AndroidRuntime(485): at android.app.ActivityThread.handleReceiver(ActivityThread.java:1794)
08-19 11:39:13.797: E/AndroidRuntime(485): ... 10 more
无敌安卓告诉一切 只是你得睁大眼睛。。 原因：android.util.AndroidRuntimeException:从活动上下文外部调用startActivity（）需要标志“活动”新任务标志。这真的是你想要的吗 logcat会在第一行告诉您问题所在
Calling startActivity() from outside of an Activity context requires the FLAG_ACTIVITY_NEW_TASK flag
Intent i = new Intent(context, maven.class);
i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
c.startActivity(i);
parentActivity.finish();
您可以获得所有可用的
意图标志的列表，它是由该意图引起的。标志\u活动\u新任务丢失。createChooser（即“在服务后台发送邮件”）将生成一个新的意图，因此我们应该重新设置它。看
请尝试下面的代码
try
{
Intent intent = Intent.createChooser(i, "Send mail...in Service Background");
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(intent);
} catch (android.content.ActivityNotFoundException ex){
Toast.makeText(context, "There are no email clients installed.", Toast.LENGTH_SHORT).show();
}
：-谢谢你的回复，很抱歉，我没有理解你。我不明白什么是意图i=新意图（context，maven.class）；c、 星触觉（i）；。事实上，我不知道该把代码放在哪里。你只需要在执行意图时添加一个标志