[英]Scheduling local notifications using Alarm Manager android
我正在使用本地通知开发android应用程序。 我使用服务实现了本地通知。 在服务中,本地通知有效,但是当我终止应用程序时,服务被破坏。 通知无效。 现在,我想使用警报管理器实现本地通知,该如何使用警报管理器来实现
这是服务等级。
import android.app.AlarmManager;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Binder;
import android.os.Bundle;
import android.os.Handler;
import android.os.IBinder;
import android.os.SystemClock;
import android.support.annotation.Nullable;
import android.support.v4.app.NotificationCompat;
import android.util.Log;
import android.widget.Toast;
import com.deemsysinc.cyberhealthapp.R;
import com.deemsysinc.cyberhealthapp.weightgoal.WeightGoalActivity;
import com.google.gson.Gson;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.HashSet;
import java.util.Set;
import java.util.StringTokenizer;
import java.util.TimeZone;
import java.util.Timer;
import java.util.TimerTask;
public class NotificationService extends Service{
private IBinder iBinder=new MyBinder();
SharedPreferences prefs;
SharedPreferences.Editor editor;
Handler handler;
// timer handling
NotificationManager manager;
Notification myNotication;
static TimerTask timerTask;
Date date1;
Date date2;
ArrayList<NotificationList> notificationLists;
int temp=0;
@Override
public void onRebind(Intent intent) {
super.onRebind(intent);
}
@Override
public boolean onUnbind(Intent intent) {
return true;
}
@Nullable
@Override
public IBinder onBind(Intent intent) {
return iBinder;
}
@Override
public void onCreate() {
super.onCreate();
handler=new Handler();
prefs = getSharedPreferences(configuration.AppPrefernce, MODE_PRIVATE);
editor = prefs.edit();
notificationLists=new ArrayList<NotificationList>();
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
timerStart();
//Remove();
return Service.START_STICKY;
}
public void showNotifications()
{
Calendar cal = Calendar.getInstance();
Date currentLocalTime = cal.getTime();
DateFormat date = new SimpleDateFormat("hh:mm a");
String localTime = date.format(currentLocalTime);
String converted = localTime.replace("am", "AM").replace("pm", "PM");
Toast.makeText(getApplicationContext(),"Timer Running",Toast.LENGTH_LONG).show();
Log.d("Locals",""+local);
//Toast.makeText(getApplicationContext(),"Service Checked",Toast.LENGTH_SHORT).show();
if(!prefs.getString("weight_hr","").equals("")) {
if (prefs.getString("weight_hr", "").equals(converted)) {
temp++;
Bundle bundle=new Bundle();
//SimpleDateFormat writeformat = new SimpleDateFormat("dd/MM/yyyy");
//String formattedDate = writeformat.format(calendar.getTime());
if(temp==1) {
notificationLists.add(new NotificationList("Weight", "It's time to log your weight today. Click to update weight!", ""));
Gson gson = new Gson();
String json = gson.toJson(notificationLists);
editor.putString("notificationlist", json);
editor.commit();
bundle.putString("fromNotificationCenter","1");
}
else
{
bundle.putString("fromNotificationCenter","0");
}
manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
Intent notificationIntent = new Intent(getApplicationContext(), WeightGoalActivity.class);
notificationIntent.putExtras(bundle);
PendingIntent pendingIntent = PendingIntent.getActivity(getApplicationContext(), 6, notificationIntent, 0);
NotificationCompat.Builder builder = new NotificationCompat.Builder(getApplicationContext());
builder.setAutoCancel(true);
builder.setContentTitle("Cyberhealths");
builder.setContentText("It's time to log your weight today. Click to update weight!");
builder.setSmallIcon(R.drawable.my_icon);
builder.setContentIntent(pendingIntent);
builder.setOngoing(false);
manager.notify(6, builder.build());
}
}
}
@Override
public void onDestroy() {
super.onDestroy();
timer.cancel();
manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
manager.cancel(6);
Toast.makeText(getApplicationContext(),"Service Destroyed",Toast.LENGTH_LONG).show();
}
private void timerStart() {
timer = new Timer();
timerTask = new TimerTask() {
@Override
public void run() {
runOnUiThread(new Runnable() {
@Override
public void run() {
try {
showNotifications();
} catch (Exception e) {
}
}
});
}
};
timer.scheduleAtFixedRate(timerTask, 0, 65000);
}
@Override
public void onTaskRemoved(Intent rootIntent) {
super.onTaskRemoved(rootIntent);
Intent restartService = new Intent(getApplicationContext(),
this.getClass());
restartService.setPackage(getPackageName());
PendingIntent restartServicePI = PendingIntent.getService(
getApplicationContext(), 1, restartService,
PendingIntent.FLAG_ONE_SHOT);
AlarmManager alarmService = (AlarmManager)getApplicationContext().getSystemService(Context.ALARM_SERVICE);
alarmService.set(AlarmManager.ELAPSED_REALTIME, SystemClock.elapsedRealtime() + 1000, restartServicePI);
}
private void runOnUiThread(Runnable runnable) {
handler.post(runnable);
}
public class MyBinder extends Binder {
public NotificationService getService() {
return NotificationService.this;
}
}
}
从startForeground()
的文档中:
使此服务在前台运行,并在此状态下向用户显示正在进行的通知。 默认情况下,服务是后台的,这意味着如果系统需要杀死它们以回收更多的内存(例如在Web浏览器中显示大页面),则可以杀死它们而不会造成太大的伤害。 如果取消服务会对用户造成破坏(例如服务正在执行背景音乐播放),则可以设置此标志,以便用户注意其音乐是否停止播放。
在showNotification()
方法中,您需要在Notification时在前台启动服务,
int FOREGROUND_ID = 6;
....
builder.setOngoing(false);
Notification notification = builder.build();
manager.notify(FOREGROUND_ID, notification);
startForeground(FOREGROUND_ID, notification);
一旦您需要停止服务,只需致电:
stopForeground(**false / true**);
通过false
,如果你不希望一次服务被停止删除通知,还是true
,如果你想要的通知应被自动删除。
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