我想在特定时间通知我的应用程序。比方说,每天早上7点,即使应用程序关闭,我也要发出通知。
我该怎么做呢?有什么教程吗?请注明链接。
发布于 2015-12-30 03:54:48
您可以使用AlarmManager
在指定时间设置闹钟
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
if (!prefs.getBoolean("firstTime", false)) {
Intent alarmIntent = new Intent(this, AlarmReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, alarmIntent, 0);
AlarmManager manager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.set(Calendar.HOUR_OF_DAY, 7);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 1);
manager.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),
AlarmManager.INTERVAL_DAY, pendingIntent);
SharedPreferences.Editor editor = prefs.edit();
editor.putBoolean("firstTime", true);
editor.apply();
}
我用SharedPreferences
检查,这不是第一次运行应用程序,如果是,你就设置闹钟,否则什么都不做,而不是在每次启动应用程序时重置闹钟。
使用BroadcastReceiver
监听警报发生的时间
public class AlarmReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
// show toast
Toast.makeText(context, "Alarm running", Toast.LENGTH_SHORT).show();
}
}
使用另一个接收器监听设备引导,以便您可以重置警报
public class DeviceBootReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals("android.intent.action.BOOT_COMPLETED")) {
// on device boot compelete, reset the alarm
Intent alarmIntent = new Intent(context, AlarmReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, alarmIntent, 0);
AlarmManager manager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.set(Calendar.HOUR_OF_DAY, 7);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 1);
manager.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),
AlarmManager.INTERVAL_DAY, pendingIntent);
}
}
}
将权限添加到清单
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
然后注册你的接收器
<receiver android:name=".DeviceBootReceiver">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
</receiver>
<receiver android:name=".AlarmReceiver" />
发布于 2021-01-08 18:07:30
使用NotifyMe安卓库接收简单的通知。很容易设置您想要弹出通知的延迟或时间。系统重新启动时将弹出通知。
使用Jitpack.io下载库将此文件添加到应用程序的build.gradle文件中。
allprojects {
repositories {
...
maven { url 'https://jitpack.io' }
}
}
将其添加到项目的build.gradle依赖项中。
dependencies {
implementation 'com.github.jakebonk:NotifyMe:1.0.1'
}
示例创建NotifyMe生成器对象
NotifyMe.Builder notifyMe = new NotifyMe.Builder(getApplicationContext());
然后设置您想要的字段。
notifyMe.title(String title);
notifyMe.content(String content);
notifyMe.color(Int red,Int green,Int blue,Int alpha);//Color of notification header
notifyMe.led_color(Int red,Int green,Int blue,Int alpha);//Color of LED when
notification pops up
notifyMe.time(Calendar time);//The time to popup notification
notifyMe.delay(Int delay);//Delay in ms
notifyMe.large_icon(Int resource);//Icon resource by ID
notifyMe.rrule("FREQ=MINUTELY;INTERVAL=5;COUNT=2")//RRULE for frequency of
//notification
notifyMe.addAction(Intent intent,String text); //The action will call the intent when
//pressed
在设置了所有需要的字段之后,只需调用build()!
notifyMe.build();
https://stackoverflow.com/questions/34517520
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