Java 对广播接收器使用IntentService而不是AsyncTask？
我正在尝试使用BroadcastReceiver发送电子邮件，使用onClick时使用AsyncTask代码工作正常，但在调用AlarmReceiver时代码不工作 对于此方法，使用IntentService是否更好？如果是这样，写这篇文章的最佳方式是什么 有人能帮忙解决这个问题吗？我对java还是新手，希望帮助提高我的知识。：） 任何帮助都将不胜感激！谢谢大家! AlarmReceiver.javaJava 对广播接收器使用IntentService而不是AsyncTask？,java,android,xml,android-asynctask,intentservice,Java,Android,Xml,Android Asynctask,Intentservice,我正在尝试使用BroadcastReceiver发送电子邮件，使用onClick时使用AsyncTask代码工作正常，但在调用AlarmReceiver时代码不工作 对于此方法，使用IntentService是否更好？如果是这样，写这篇文章的最佳方式是什么 有人能帮忙解决这个问题吗？我对java还是新手，希望帮助提高我的知识。：） 任何帮助都将不胜感激！谢谢大家! AlarmReceiver.java import android.app.Activity; import android.app
import android.app.Activity;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.support.v4.app.NotificationCompat;
import android.content.BroadcastReceiver;
import android.os.AsyncTask;
import android.util.Log;
import android.widget.Toast;
import static android.graphics.Color.GREEN;
public class AlarmReceiver extends BroadcastReceiver {
Context cxt;
Activity context;
@Override
public void onReceive(Context arg0, Intent arg1) {
cxt = arg0;
addNotification();
new SendMail().execute();
}
private class SendMail extends AsyncTask<String, Integer, Void> {
protected Void doInBackground(String... params) {
Mail m = new Mail("youremail@gmail.com", "password");
String[] toArr = {"toemail@outlook.com"};
m.setTo(toArr);
m.setFrom("fromemail@gmail.com");
m.setSubject("Achieve Alert!");
m.setBody("This is a reminder about your upcoming assignment or examination!");
try {
if(m.send()) {
Toast.makeText(context.getApplicationContext(), "Email was sent successfully.", Toast.LENGTH_LONG).show();
} else {
Toast.makeText(context.getApplicationContext(), "Email was not sent.", Toast.LENGTH_LONG).show();
}
} catch(Exception e) {
Log.e("MailApp", "Could not send email", e);
}
return null;
}
}
}
导入android.app.Activity；
导入android.app.NotificationManager；
导入android.app.pendingent；
导入android.content.Context；
导入android.content.Intent；
导入android.support.v4.app.NotificationCompat；
导入android.content.BroadcastReceiver；
导入android.os.AsyncTask；
导入android.util.Log；
导入android.widget.Toast；
导入静态android.graphics.Color.GREEN；
公共类AlarmReceiver扩展了BroadcastReceiver{
上下文cxt；
活动语境；
@凌驾
公共void onReceive（上下文arg0，意图arg1）{
cxt=arg0；
添加通知（）；
新建SendMail（）.execute（）；
}
私有类SendMail扩展了异步任务{
受保护的Void doInBackground（字符串…参数）{
邮件m=新邮件（“youremail@gmail.com“，”密码“）；
字符串[]toArr={”toemail@outlook.com"};
m、 设置为（toArr）；
m、 setFrom（“fromemail@gmail.com");
m、 setSubject（“实现警报！”）；
m、 setBody（“这是对您即将进行的作业或考试的提醒！”）；
试一试{
if（m.send（））{
Toast.makeText（context.getApplicationContext（），“电子邮件已成功发送。”，Toast.LENGTH_LONG.show（）；
}否则{
Toast.makeText（context.getApplicationContext（），“电子邮件未发送”，Toast.LENGTH_LONG.show（）；
}
}捕获（例外e）{
Log.e（“MailApp”，“无法发送电子邮件”，e）；
}
返回null；
}
}
}
private void setAlarm(Calendar targetCal){
/* HERE */ Intent intent = new Intent(getBaseContext(), AlarmService.class);
final int _id = (int) System.currentTimeMillis();
/* HERE */ PendingIntent pendingIntent = PendingIntent.getService(this,_id,intent,PendingIntent.FLAG_ONE_SHOT);
AlarmManager alarmManager = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
......
.....
public class AlarmService extends IntentService {
PowerManager powerManager;
PowerManager.WakeLock wakeLock;
public AlarmService() {
super("");
}
@Override
protected void onHandleIntent(Intent intent) {
powerManager = (PowerManager) getSystemService(POWER_SERVICE);
wakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "FCFCFCFC");
wakeLock.acquire();
addNotification();
sendMAIL();
}
public void addNotification() {
NotificationCompat.Builder builder =
new NotificationCompat.Builder(getApplicationContext())
.setSmallIcon(R.drawable.icon_transperent)
.setLights(GREEN, 700, 700)
.setContentTitle("Achieve - Alert!")
.setContentText("This is a reminder for your deadline!");
Intent notificationIntent = new Intent(getApplicationContext(), MainMenu.class);
PendingIntent contentIntent = PendingIntent.getActivity(getApplicationContext(), 0, notificationIntent,
PendingIntent.FLAG_UPDATE_CURRENT);
builder.setContentIntent(contentIntent);
// Add as notification
NotificationManager manager = (NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);
builder.setVibrate(new long[] { 0, 1000, 1000, 1000, 1000 });
manager.notify(0, builder.build());
}
public void sendMAIL(){
Mail m = new Mail("youremail@gmail.com", "password");
String[] toArr = {"toemail@outlook.com"};
m.setTo(toArr);
m.setFrom("fromemail@gmail.com");
m.setSubject("Achieve Alert!");
m.setBody("This is a reminder about your upcoming assignment or examination!");
try {
if(m.send()) {
Toast.makeText(getApplicationContext(), "Email was sent successfully.", Toast.LENGTH_LONG).show();
} else {
Toast.makeText(getApplicationContext(), "Email was not sent.", Toast.LENGTH_LONG).show();
}
} catch(Exception e) {
Log.e("MailApp", "Could not send email", e);
}
wakeLock.release();
}
@Override
public void onDestroy() {
super.onDestroy();
}
}
<uses-permission android:name="com.android.alarm.permission.SET_ALARM"/>
<uses-permission android:name="android.permission.WAKE_LOCK"/>
<service android:name=".AlarmService" android:exported="true" android:enabled="true"/>
报警管理器的首次启动意图服务：
private void setAlarm(Calendar targetCal){
/* HERE */ Intent intent = new Intent(getBaseContext(), AlarmService.class);
final int _id = (int) System.currentTimeMillis();
/* HERE */ PendingIntent pendingIntent = PendingIntent.getService(this,_id,intent,PendingIntent.FLAG_ONE_SHOT);
AlarmManager alarmManager = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
......
.....
public class AlarmService extends IntentService {
PowerManager powerManager;
PowerManager.WakeLock wakeLock;
public AlarmService() {
super("");
}
@Override
protected void onHandleIntent(Intent intent) {
powerManager = (PowerManager) getSystemService(POWER_SERVICE);
wakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "FCFCFCFC");
wakeLock.acquire();
addNotification();
sendMAIL();
}
public void addNotification() {
NotificationCompat.Builder builder =
new NotificationCompat.Builder(getApplicationContext())
.setSmallIcon(R.drawable.icon_transperent)
.setLights(GREEN, 700, 700)
.setContentTitle("Achieve - Alert!")
.setContentText("This is a reminder for your deadline!");
Intent notificationIntent = new Intent(getApplicationContext(), MainMenu.class);
PendingIntent contentIntent = PendingIntent.getActivity(getApplicationContext(), 0, notificationIntent,
PendingIntent.FLAG_UPDATE_CURRENT);
builder.setContentIntent(contentIntent);
// Add as notification
NotificationManager manager = (NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);
builder.setVibrate(new long[] { 0, 1000, 1000, 1000, 1000 });
manager.notify(0, builder.build());
}
public void sendMAIL(){
Mail m = new Mail("youremail@gmail.com", "password");
String[] toArr = {"toemail@outlook.com"};
m.setTo(toArr);
m.setFrom("fromemail@gmail.com");
m.setSubject("Achieve Alert!");
m.setBody("This is a reminder about your upcoming assignment or examination!");
try {
if(m.send()) {
Toast.makeText(getApplicationContext(), "Email was sent successfully.", Toast.LENGTH_LONG).show();
} else {
Toast.makeText(getApplicationContext(), "Email was not sent.", Toast.LENGTH_LONG).show();
}
} catch(Exception e) {
Log.e("MailApp", "Could not send email", e);
}
wakeLock.release();
}
@Override
public void onDestroy() {
super.onDestroy();
}
}
<uses-permission android:name="com.android.alarm.permission.SET_ALARM"/>
<uses-permission android:name="android.permission.WAKE_LOCK"/>
<service android:name=".AlarmService" android:exported="true" android:enabled="true"/>