Android 通知应用无法正常工作
Android notification app not working properly
我正在开发一个 android 应用程序，其中一部分涉及提醒用户做某事的通知。此通知在指定时间每 12 小时重复一次。我正在使用 AlarmManager 来安排闹钟，我还包含了在设备启动时启动我的闹钟服务的代码。这是我的 java 类：
MainActivity.java
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
SharedPreferences preferences = PreferenceManager
.getDefaultSharedPreferences(this);
SharedPreferences.Editor editor = preferences.edit();
int i = preferences.getInt("numberoflaunches", 1);
if (i < 2) {
alarmMethod();
i++;
editor.putInt("numberoflaunches", i);
editor.commit();
}
}
private void alarmMethod() {
Intent intent = new Intent(this, AlarmService.class);
this.startService(intent);
Toast.makeText(MainActivity.this, "Alarm Set", Toast.LENGTH_SHORT).show();
}
}
AlarmService.java
public class AlarmService extends Service {
//used for register alarm manager
PendingIntent pendingIntent;
//used to store running alarm manager instance
AlarmManager alarmMgr;
//Callback function for alarm manager event
BroadcastReceiver mReceiver;
private static final String TAG = "MyService";
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onCreate() {
super.onCreate();
//Register AlarmManager Broadcast receive.
RegisterAlarmBroadcast();
}
@Override
public void onStart(Intent intent, int startid) {
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MINUTE, 30);
calendar.set(Calendar.HOUR_OF_DAY, 6);
alarmMgr.cancel(pendingIntent);
alarmMgr.setRepeating(AlarmManager.RTC_WAKEUP,
calendar.getTimeInMillis(), 1000 * 60 * 60 * 12, pendingIntent);
}
private void showNotification() {
Uri soundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
Notification notification = new NotificationCompat.Builder(this)
.setContentTitle("app_name")
.setContentText("something")
.setContentIntent(PendingIntent.getActivity(this, 0, new Intent(this, MainActivity.class), PendingIntent.FLAG_UPDATE_CURRENT))
.setSound(soundUri)
.setSmallIcon(R.drawable.notification_icon)
.setAutoCancel(true)
.setOnlyAlertOnce(true)
.build();
NotificationManagerCompat.from(this).notify(0, notification);
}
private void RegisterAlarmBroadcast() {
Log.i("RegisterAlarmBroadcast", "Register Intent.RegisterAlarmBroadcast");
//This is the call back function(BroadcastReceiver) which will be called when your alarm time is reached.
mReceiver = new BroadcastReceiver() {
private static final String TAG = "Alarm Example Receiver";
@Override
public void onReceive(Context context, Intent intent) {
Log.i(TAG, "BroadcastReceiver::OnReceive() >>>>>>>>>>>>>>>>>>>>>>>>>>>>>");
showNotification();
}
};
//Register the alarm broadcast here
registerReceiver(mReceiver, new IntentFilter("com.example.application.myNotification"));
pendingIntent = PendingIntent.getBroadcast(this, 0, new Intent("com.example.application.myNotification"), 0);
alarmMgr = (AlarmManager) (this.getSystemService(Context.ALARM_SERVICE));
}
public void onDestroy() {
super.onDestroy();
Log.d(TAG, "onDestroy");
}
}
autostart.java
public class autostart extends BroadcastReceiver {
@Override
public void onReceive(Context arg0, Intent arg1)
{
Intent intent = new Intent(arg0,AlarmService.class);
arg0.startService(intent);
Log.i("Autostart", "started");
}
}
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.application" >
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver android:name=".autostart">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
</receiver>
<service
android:name=".AlarmService"
android:enabled="true" />
</application>
但是我肯定做错了什么，因为它不能正常工作。我的问题是：
1. 当我退出应用程序时，通知不知为何消失了，无论何时。
2. 当我重新启动时，无论什么时候通知都会消失。
我不知道这些问题是否有任何关联，也许我有一段代码把一切都搞砸了。但无论哪种方式，我都会非常感谢我能得到的任何帮助。提前致谢。
重复间隔应为 24 小时 (1000 * 60 * 60 * 24)，而不是 12 小时。
您单独将时间设置为早上 6 点。所以你可以删除行 calendar.setTimeInMillis(System.currentTimeMillis());
编辑：
我对您的代码进行了一些修改，终于可以正常运行了。
您的问题是您设置了 6:00 上午的闹钟。但是您是在 6:00 AM（比如 9:00 AM）之后的某个时间设置此闹钟。也就是说，您正在为过去的时间设置闹钟。所以它会立即熄灭。
我为此做了一个变通。如果您需要设置闹钟的时间已过，请将闹钟设置为第二天触发。
这是我修改后的代码。
MainActivity.java
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
SharedPreferences preferences = PreferenceManager
.getDefaultSharedPreferences(this);
SharedPreferences.Editor editor = preferences.edit();
int i = preferences.getInt("numberoflaunches", 1);
if (i < 2) {
alarmMethod();
i++;
editor.putInt("numberoflaunches", i);
editor.commit();
}
}
private void alarmMethod() {
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0,
new Intent("com.example.application.myNotification"),
PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager alarmMgr = (AlarmManager) (this
.getSystemService(Context.ALARM_SERVICE));
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MINUTE, 30);
calendar.set(Calendar.HOUR_OF_DAY, 6);
long mills = calendar.getTimeInMillis();
if (mills <= System.currentTimeMillis()) {
Calendar c1 = calendar;
c1.add(Calendar.DAY_OF_MONTH, 1);
mills = c1.getTimeInMillis();
} else {
mills = calendar.getTimeInMillis();
}
alarmMgr.setRepeating(AlarmManager.RTC_WAKEUP, mills,
1000 * 60 * 60 * 24, pendingIntent);
Toast.makeText(MainActivity.this, "Alarm Set", Toast.LENGTH_SHORT)
.show();
}
}
Autostart.java
public class Autostart extends BroadcastReceiver {
@Override
public void onReceive(Context arg0, Intent arg1)
{
PendingIntent pendingIntent = PendingIntent.getBroadcast(arg0, 0, new Intent("com.example.application.myNotification"), 0);
AlarmManager alarmMgr = (AlarmManager) (arg0.getSystemService(Context.ALARM_SERVICE));
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MINUTE, 30);
calendar.set(Calendar.HOUR_OF_DAY, 6);
long mills = calendar.getTimeInMillis();
if (mills <= System.currentTimeMillis()) {
Calendar c1 = calendar;
c1.add(Calendar.DAY_OF_MONTH, 1);
mills = c1.getTimeInMillis();
} else {
mills = calendar.getTimeInMillis();
}
alarmMgr.setRepeating(AlarmManager.RTC_WAKEUP, mills, 1000 * 60 * 60 * 24, pendingIntent);
Log.i("Autostart", "started");
}
}
Alarmer.java
public class Alarmer extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
showNotification(context);
}
private void showNotification(Context context) {
Random r = new Random();
int r0 = r.nextInt();
Uri soundUri = RingtoneManager
.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
Notification notification = new NotificationCompat.Builder(context)
.setContentTitle("app_name")
.setContentText("something" + r0)
.setContentIntent(
PendingIntent.getActivity(context, 0, new Intent(context,
MainActivity.class),
PendingIntent.FLAG_UPDATE_CURRENT))
.setSound(soundUri).setSmallIcon(R.drawable.ic_launcher)
.setAutoCancel(true).setOnlyAlertOnce(true).build();
// NotificationManagerCompat.from(this).notify(0, notification);
NotificationManager nm = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
nm.notify(r0, notification);
}
}
AndroiManifest.xml
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.alarmtest"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="16" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver android:name=".autostart" >
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
</receiver>
<receiver android:name=".Alarmer" android:enabled="true">
<intent-filter>
<action android:name="com.example.application.myNotification" />
</intent-filter>
</receiver>
<service
android:name=".AlarmService"
android:enabled="true" />
</application>
</manifest>
将其与您的代码进行比较并进行更改。
我正在开发一个 android 应用程序，其中一部分涉及提醒用户做某事的通知。此通知在指定时间每 12 小时重复一次。我正在使用 AlarmManager 来安排闹钟，我还包含了在设备启动时启动我的闹钟服务的代码。这是我的 java 类：
MainActivity.java
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
SharedPreferences preferences = PreferenceManager
.getDefaultSharedPreferences(this);
SharedPreferences.Editor editor = preferences.edit();
int i = preferences.getInt("numberoflaunches", 1);
if (i < 2) {
alarmMethod();
i++;
editor.putInt("numberoflaunches", i);
editor.commit();
}
}
private void alarmMethod() {
Intent intent = new Intent(this, AlarmService.class);
this.startService(intent);
Toast.makeText(MainActivity.this, "Alarm Set", Toast.LENGTH_SHORT).show();
}
}
AlarmService.java
public class AlarmService extends Service {
//used for register alarm manager
PendingIntent pendingIntent;
//used to store running alarm manager instance
AlarmManager alarmMgr;
//Callback function for alarm manager event
BroadcastReceiver mReceiver;
private static final String TAG = "MyService";
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onCreate() {
super.onCreate();
//Register AlarmManager Broadcast receive.
RegisterAlarmBroadcast();
}
@Override
public void onStart(Intent intent, int startid) {
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MINUTE, 30);
calendar.set(Calendar.HOUR_OF_DAY, 6);
alarmMgr.cancel(pendingIntent);
alarmMgr.setRepeating(AlarmManager.RTC_WAKEUP,
calendar.getTimeInMillis(), 1000 * 60 * 60 * 12, pendingIntent);
}
private void showNotification() {
Uri soundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
Notification notification = new NotificationCompat.Builder(this)
.setContentTitle("app_name")
.setContentText("something")
.setContentIntent(PendingIntent.getActivity(this, 0, new Intent(this, MainActivity.class), PendingIntent.FLAG_UPDATE_CURRENT))
.setSound(soundUri)
.setSmallIcon(R.drawable.notification_icon)
.setAutoCancel(true)
.setOnlyAlertOnce(true)
.build();
NotificationManagerCompat.from(this).notify(0, notification);
}
private void RegisterAlarmBroadcast() {
Log.i("RegisterAlarmBroadcast", "Register Intent.RegisterAlarmBroadcast");
//This is the call back function(BroadcastReceiver) which will be called when your alarm time is reached.
mReceiver = new BroadcastReceiver() {
private static final String TAG = "Alarm Example Receiver";
@Override
public void onReceive(Context context, Intent intent) {
Log.i(TAG, "BroadcastReceiver::OnReceive() >>>>>>>>>>>>>>>>>>>>>>>>>>>>>");
showNotification();
}
};
//Register the alarm broadcast here
registerReceiver(mReceiver, new IntentFilter("com.example.application.myNotification"));
pendingIntent = PendingIntent.getBroadcast(this, 0, new Intent("com.example.application.myNotification"), 0);
alarmMgr = (AlarmManager) (this.getSystemService(Context.ALARM_SERVICE));
}
public void onDestroy() {
super.onDestroy();
Log.d(TAG, "onDestroy");
}
}
autostart.java
public class autostart extends BroadcastReceiver {
@Override
public void onReceive(Context arg0, Intent arg1)
{
Intent intent = new Intent(arg0,AlarmService.class);
arg0.startService(intent);
Log.i("Autostart", "started");
}
}
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.application" >
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver android:name=".autostart">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
</receiver>
<service
android:name=".AlarmService"
android:enabled="true" />
</application>
但是我肯定做错了什么，因为它不能正常工作。我的问题是：
1. 当我退出应用程序时，通知不知为何消失了，无论何时。
2. 当我重新启动时，无论什么时候通知都会消失。
我不知道这些问题是否有任何关联，也许我有一段代码把一切都搞砸了。但无论哪种方式，我都会非常感谢我能得到的任何帮助。提前致谢。
重复间隔应为 24 小时 (1000 * 60 * 60 * 24)，而不是 12 小时。
您单独将时间设置为早上 6 点。所以你可以删除行 calendar.setTimeInMillis(System.currentTimeMillis());
编辑：
我对您的代码进行了一些修改，终于可以正常运行了。
您的问题是您设置了 6:00 上午的闹钟。但是您是在 6:00 AM（比如 9:00 AM）之后的某个时间设置此闹钟。也就是说，您正在为过去的时间设置闹钟。所以它会立即熄灭。
我为此做了一个变通。如果您需要设置闹钟的时间已过，请将闹钟设置为第二天触发。
这是我修改后的代码。
MainActivity.java
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
SharedPreferences preferences = PreferenceManager
.getDefaultSharedPreferences(this);
SharedPreferences.Editor editor = preferences.edit();
int i = preferences.getInt("numberoflaunches", 1);
if (i < 2) {
alarmMethod();
i++;
editor.putInt("numberoflaunches", i);
editor.commit();
}
}
private void alarmMethod() {
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0,
new Intent("com.example.application.myNotification"),
PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager alarmMgr = (AlarmManager) (this
.getSystemService(Context.ALARM_SERVICE));
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MINUTE, 30);
calendar.set(Calendar.HOUR_OF_DAY, 6);
long mills = calendar.getTimeInMillis();
if (mills <= System.currentTimeMillis()) {
Calendar c1 = calendar;
c1.add(Calendar.DAY_OF_MONTH, 1);
mills = c1.getTimeInMillis();
} else {
mills = calendar.getTimeInMillis();
}
alarmMgr.setRepeating(AlarmManager.RTC_WAKEUP, mills,
1000 * 60 * 60 * 24, pendingIntent);
Toast.makeText(MainActivity.this, "Alarm Set", Toast.LENGTH_SHORT)
.show();
}
}
Autostart.java
public class Autostart extends BroadcastReceiver {
@Override
public void onReceive(Context arg0, Intent arg1)
{
PendingIntent pendingIntent = PendingIntent.getBroadcast(arg0, 0, new Intent("com.example.application.myNotification"), 0);
AlarmManager alarmMgr = (AlarmManager) (arg0.getSystemService(Context.ALARM_SERVICE));
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MINUTE, 30);
calendar.set(Calendar.HOUR_OF_DAY, 6);
long mills = calendar.getTimeInMillis();
if (mills <= System.currentTimeMillis()) {
Calendar c1 = calendar;
c1.add(Calendar.DAY_OF_MONTH, 1);
mills = c1.getTimeInMillis();
} else {
mills = calendar.getTimeInMillis();
}
alarmMgr.setRepeating(AlarmManager.RTC_WAKEUP, mills, 1000 * 60 * 60 * 24, pendingIntent);
Log.i("Autostart", "started");
}
}
Alarmer.java
public class Alarmer extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
showNotification(context);
}
private void showNotification(Context context) {
Random r = new Random();
int r0 = r.nextInt();
Uri soundUri = RingtoneManager
.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
Notification notification = new NotificationCompat.Builder(context)
.setContentTitle("app_name")
.setContentText("something" + r0)
.setContentIntent(
PendingIntent.getActivity(context, 0, new Intent(context,
MainActivity.class),
PendingIntent.FLAG_UPDATE_CURRENT))
.setSound(soundUri).setSmallIcon(R.drawable.ic_launcher)
.setAutoCancel(true).setOnlyAlertOnce(true).build();
// NotificationManagerCompat.from(this).notify(0, notification);
NotificationManager nm = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
nm.notify(r0, notification);
}
}
AndroiManifest.xml
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.alarmtest"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="16" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver android:name=".autostart" >
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
</receiver>
<receiver android:name=".Alarmer" android:enabled="true">
<intent-filter>
<action android:name="com.example.application.myNotification" />
</intent-filter>
</receiver>
<service
android:name=".AlarmService"
android:enabled="true" />
</application>
</manifest>
将其与您的代码进行比较并进行更改。