通知无法在 android studio 上工作（API 27，ANDROID 8.1.0）
notify not working on android studio ( API 27, ANDROID 8.1.0)
我正在尝试修复我的代码，我想在我的应用程序上添加通知，但我不知道为什么它不起作用。
这是 notificaService.java:
public class notificaService extends BroadcastReceiver {
DatabaseHelper db;
String CHANNEL_ID = "150";
String id;
String KEY_TEXT_REPLY = "key_text_reply";
@RequiresApi(api = Build.VERSION_CODES.O)
@Override
public void onReceive(Context context, Intent intent) {
db = new DatabaseHelper (context);
String temperatura1, glicemia1, battito1, peso1;
temperatura1 = "temperatura";
glicemia1 = "glicemia";
battito1 = "battito";
peso1 = "peso";
//verify whether if user as inserted any record today
long reports = db.countRows(temperatura1) + db.countRows(glicemia1)
+ db.countRows(peso1) + db.countRows(battito1);
String haji1 = String.valueOf (reports);
Log.i("LALALALALALSERVICE", haji1);
//builder for the notification
NotificationCompat.Builder builder = new NotificationCompat.Builder(context, CHANNEL_ID);
//as the user clicks on the intent, open MainActivity aka ReportFragment
Intent myIntent = new Intent(context, MainActivity.class);
PendingIntent pendingIntent = PendingIntent.getActivity(
context, 0, myIntent, PendingIntent.FLAG_ONE_SHOT
);
Intent intent1 = new Intent(context, MainActivity.class);
PendingIntent resultPendingIntent = PendingIntent.getActivity(context,0,intent1,PendingIntent.FLAG_ONE_SHOT);
//set notification features
builder.setContentTitle("Daily Reminder")
.setContentText("Remember to fill today's report")
.setSmallIcon(R.drawable.alarmclock)
.setPriority(NotificationCompat.PRIORITY_DEFAULT)
.setColor(Color.BLUE)
.setAutoCancel(true)
//.setChannelId(id)
//.addAction(R.drawable.logout_icon, "SET TIME", resultPendingIntent)
.setContentIntent(pendingIntent);
NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
//if no reports are recorded, trigger notification
if(reports == 0)
notificationManager.notify(1, builder.build());
}
}
这里是Notifica.java，我在这里设置通知时间：
public class Notifica extends AppCompatActivity {
private EditText edt_orario;
private Button btnInvio, btn_setOrario;
DatabaseHelper db = new DatabaseHelper(this);
Calendar calendar = Calendar.getInstance ( );
long reports;
String channel = "100";
private final boolean[] vibration = new boolean[1];
private NotificationManager notificationManager;
String KEY_TEXT_REPLY = "key_text_reply";
String CHANNEL_ID = "200";
@RequiresApi(api = Build.VERSION_CODES.O)
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate (savedInstanceState);
setContentView (R.layout.activity_notifica);
edt_orario=findViewById(R.id.edt_orario);
btn_setOrario=findViewById(R.id.btn_setOrario);
btnInvio=findViewById(R.id.btnInvio);
db = new DatabaseHelper (this);
String temperatura1, glicemia1, battito1, peso1;
temperatura1 = "temperatura";
glicemia1 = "glicemia";
battito1 = "battito";
peso1 = "peso";
reports = db.countRows(temperatura1) + db.countRows(glicemia1)
+ db.countRows(peso1) + db.countRows(battito1);
String haji1 = String.valueOf (reports);
Log.i("LALALALALAL", haji1);
//instatiate the notification manager
notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
createNotificationChannel(CHANNEL_ID);
//create the channel through which the notification should communicate.
/*dataSpe = oggi.format (new Date());
cursor = db.viewDataOggi("peso",dataSpe);
cursor1 = db.viewDataOggi("temperatura",dataSpe);
cursor2 = db.viewDataOggi("glicemia", dataSpe);
cursor3 = db.viewDataOggi("battito", dataSpe);
Log.i("kkkkkkkkkkkk", " "+ cursor2.getCount());*/
//bottone per impostare l'orario in cui arriverà la notifica
btn_setOrario.setOnClickListener(new View.OnClickListener() {
Calendar c = Calendar.getInstance();
int hour = c.get(Calendar.HOUR_OF_DAY);
int min = c.get(Calendar.MINUTE);
@Override
public void onClick(View v) {
TimePickerDialog timePickerDialog = new TimePickerDialog(Notifica.this, new TimePickerDialog.OnTimeSetListener() {
@Override
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
String realMinute, realHour;
//controllo per inserire l'orario in formato leggibile
if (minute < 10) {
realMinute = "0" + minute;
} else {
realMinute = String.valueOf (minute);
}
if (hourOfDay < 10) {
realHour = "0" + hourOfDay;
} else {
realHour = String.valueOf (hourOfDay);
}
edt_orario.setText (realHour + ":" + realMinute);
}
}, hour, min, true);
timePickerDialog.show();
}
});
btnInvio.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//se non c'è nessun report inserito per la data di oggi, allora ...
//if ((cursor.getCount() == 0) || (cursor1.getCount() == 0) || (cursor2.getCount() == 0) || (cursor3.getCount() == 0)) {
//classe per gestire lo scatto della notifica alla stessa ora tutti i giorni
//if (reports == 0) {
AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
Intent intent;
PendingIntent pendingIntent;
//impostazione dell'orario in cui scatterà la notifica
int hour, min;
hour = Integer.parseInt (edt_orario.getText ( ).toString ( ).substring (0, 2));
min = Integer.parseInt (edt_orario.getText ( ).toString ( ).substring (3));
Calendar c = Calendar.getInstance ( );
c.set (Calendar.HOUR_OF_DAY, hour);
c.set (Calendar.MINUTE, min);
c.set (Calendar.SECOND, 1);
//passo la gestione della notifica al NotificationService tramite l'intent
intent = new Intent (Notifica.this, notificaService.class);
//gestisco lo scatto della notifica tramite broadcast
pendingIntent = PendingIntent.getBroadcast (Notifica.this, 0, intent, 0);
alarmManager.setInexactRepeating (alarmManager.RTC_WAKEUP, c.getTimeInMillis ( ), AlarmManager.INTERVAL_DAY, pendingIntent);
Toast.makeText (getApplicationContext ( ), "Impostazioni salvate", Toast.LENGTH_SHORT).show ( );
}
// }
}
);
}
/*@Override
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
calendar.set(Calendar.HOUR_OF_DAY, hourOfDay);
calendar.set(Calendar.MINUTE, minute);
}
*/
@RequiresApi(api = Build.VERSION_CODES.O)
private void createNotificationChannel (String id){
int importanza = NotificationManager.IMPORTANCE_HIGH;
NotificationChannel notificationChannel = new NotificationChannel(id, "info", importanza);
notificationChannel.setDescription("info");
notificationChannel.enableVibration(true);
notificationChannel.setLightColor(Color.RED);
notificationManager.createNotificationChannel(notificationChannel);
}
}
在我的 Db 中，一切正常，因为我已经看到了，感谢 Log。所以我不知道我在哪里犯了错误。
感谢您的帮助！
以下代码将创建一个通知，您可以设置标题和 body :
public void showNotification(Context context, String title, String body, Intent intent) {
NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
int notificationId = 1;
String channelId = "channel-01";
String channelName = "Channel Name";
int importance = NotificationManager.IMPORTANCE_HIGH;
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
NotificationChannel mChannel = new NotificationChannel(
channelId, channelName, importance);
notificationManager.createNotificationChannel(mChannel);
}
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(context, channelId)
.setSmallIcon(R.drawable.ic_baseline_notifications_active_24)
.setContentTitle(title)
.setContentText(body);
TaskStackBuilder stackBuilder = TaskStackBuilder.create(context);
stackBuilder.addNextIntent(intent);
PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(
0,
PendingIntent.FLAG_UPDATE_CURRENT
);
mBuilder.setContentIntent(resultPendingIntent);
notificationManager.notify(notificationId, mBuilder.build());
}
要显示通知，您需要做的就是调用函数：
showNotification(getApplicationContext(),"This is the title", "This is the body", getIntent());
我正在尝试修复我的代码，我想在我的应用程序上添加通知，但我不知道为什么它不起作用。 这是 notificaService.java:
public class notificaService extends BroadcastReceiver {
DatabaseHelper db;
String CHANNEL_ID = "150";
String id;
String KEY_TEXT_REPLY = "key_text_reply";
@RequiresApi(api = Build.VERSION_CODES.O)
@Override
public void onReceive(Context context, Intent intent) {
db = new DatabaseHelper (context);
String temperatura1, glicemia1, battito1, peso1;
temperatura1 = "temperatura";
glicemia1 = "glicemia";
battito1 = "battito";
peso1 = "peso";
//verify whether if user as inserted any record today
long reports = db.countRows(temperatura1) + db.countRows(glicemia1)
+ db.countRows(peso1) + db.countRows(battito1);
String haji1 = String.valueOf (reports);
Log.i("LALALALALALSERVICE", haji1);
//builder for the notification
NotificationCompat.Builder builder = new NotificationCompat.Builder(context, CHANNEL_ID);
//as the user clicks on the intent, open MainActivity aka ReportFragment
Intent myIntent = new Intent(context, MainActivity.class);
PendingIntent pendingIntent = PendingIntent.getActivity(
context, 0, myIntent, PendingIntent.FLAG_ONE_SHOT
);
Intent intent1 = new Intent(context, MainActivity.class);
PendingIntent resultPendingIntent = PendingIntent.getActivity(context,0,intent1,PendingIntent.FLAG_ONE_SHOT);
//set notification features
builder.setContentTitle("Daily Reminder")
.setContentText("Remember to fill today's report")
.setSmallIcon(R.drawable.alarmclock)
.setPriority(NotificationCompat.PRIORITY_DEFAULT)
.setColor(Color.BLUE)
.setAutoCancel(true)
//.setChannelId(id)
//.addAction(R.drawable.logout_icon, "SET TIME", resultPendingIntent)
.setContentIntent(pendingIntent);
NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
//if no reports are recorded, trigger notification
if(reports == 0)
notificationManager.notify(1, builder.build());
}
}
这里是Notifica.java，我在这里设置通知时间：
public class Notifica extends AppCompatActivity {
private EditText edt_orario;
private Button btnInvio, btn_setOrario;
DatabaseHelper db = new DatabaseHelper(this);
Calendar calendar = Calendar.getInstance ( );
long reports;
String channel = "100";
private final boolean[] vibration = new boolean[1];
private NotificationManager notificationManager;
String KEY_TEXT_REPLY = "key_text_reply";
String CHANNEL_ID = "200";
@RequiresApi(api = Build.VERSION_CODES.O)
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate (savedInstanceState);
setContentView (R.layout.activity_notifica);
edt_orario=findViewById(R.id.edt_orario);
btn_setOrario=findViewById(R.id.btn_setOrario);
btnInvio=findViewById(R.id.btnInvio);
db = new DatabaseHelper (this);
String temperatura1, glicemia1, battito1, peso1;
temperatura1 = "temperatura";
glicemia1 = "glicemia";
battito1 = "battito";
peso1 = "peso";
reports = db.countRows(temperatura1) + db.countRows(glicemia1)
+ db.countRows(peso1) + db.countRows(battito1);
String haji1 = String.valueOf (reports);
Log.i("LALALALALAL", haji1);
//instatiate the notification manager
notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
createNotificationChannel(CHANNEL_ID);
//create the channel through which the notification should communicate.
/*dataSpe = oggi.format (new Date());
cursor = db.viewDataOggi("peso",dataSpe);
cursor1 = db.viewDataOggi("temperatura",dataSpe);
cursor2 = db.viewDataOggi("glicemia", dataSpe);
cursor3 = db.viewDataOggi("battito", dataSpe);
Log.i("kkkkkkkkkkkk", " "+ cursor2.getCount());*/
//bottone per impostare l'orario in cui arriverà la notifica
btn_setOrario.setOnClickListener(new View.OnClickListener() {
Calendar c = Calendar.getInstance();
int hour = c.get(Calendar.HOUR_OF_DAY);
int min = c.get(Calendar.MINUTE);
@Override
public void onClick(View v) {
TimePickerDialog timePickerDialog = new TimePickerDialog(Notifica.this, new TimePickerDialog.OnTimeSetListener() {
@Override
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
String realMinute, realHour;
//controllo per inserire l'orario in formato leggibile
if (minute < 10) {
realMinute = "0" + minute;
} else {
realMinute = String.valueOf (minute);
}
if (hourOfDay < 10) {
realHour = "0" + hourOfDay;
} else {
realHour = String.valueOf (hourOfDay);
}
edt_orario.setText (realHour + ":" + realMinute);
}
}, hour, min, true);
timePickerDialog.show();
}
});
btnInvio.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//se non c'è nessun report inserito per la data di oggi, allora ...
//if ((cursor.getCount() == 0) || (cursor1.getCount() == 0) || (cursor2.getCount() == 0) || (cursor3.getCount() == 0)) {
//classe per gestire lo scatto della notifica alla stessa ora tutti i giorni
//if (reports == 0) {
AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
Intent intent;
PendingIntent pendingIntent;
//impostazione dell'orario in cui scatterà la notifica
int hour, min;
hour = Integer.parseInt (edt_orario.getText ( ).toString ( ).substring (0, 2));
min = Integer.parseInt (edt_orario.getText ( ).toString ( ).substring (3));
Calendar c = Calendar.getInstance ( );
c.set (Calendar.HOUR_OF_DAY, hour);
c.set (Calendar.MINUTE, min);
c.set (Calendar.SECOND, 1);
//passo la gestione della notifica al NotificationService tramite l'intent
intent = new Intent (Notifica.this, notificaService.class);
//gestisco lo scatto della notifica tramite broadcast
pendingIntent = PendingIntent.getBroadcast (Notifica.this, 0, intent, 0);
alarmManager.setInexactRepeating (alarmManager.RTC_WAKEUP, c.getTimeInMillis ( ), AlarmManager.INTERVAL_DAY, pendingIntent);
Toast.makeText (getApplicationContext ( ), "Impostazioni salvate", Toast.LENGTH_SHORT).show ( );
}
// }
}
);
}
/*@Override
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
calendar.set(Calendar.HOUR_OF_DAY, hourOfDay);
calendar.set(Calendar.MINUTE, minute);
}
*/
@RequiresApi(api = Build.VERSION_CODES.O)
private void createNotificationChannel (String id){
int importanza = NotificationManager.IMPORTANCE_HIGH;
NotificationChannel notificationChannel = new NotificationChannel(id, "info", importanza);
notificationChannel.setDescription("info");
notificationChannel.enableVibration(true);
notificationChannel.setLightColor(Color.RED);
notificationManager.createNotificationChannel(notificationChannel);
}
}
在我的 Db 中，一切正常，因为我已经看到了，感谢 Log。所以我不知道我在哪里犯了错误。 感谢您的帮助！
以下代码将创建一个通知，您可以设置标题和 body :
public void showNotification(Context context, String title, String body, Intent intent) {
NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
int notificationId = 1;
String channelId = "channel-01";
String channelName = "Channel Name";
int importance = NotificationManager.IMPORTANCE_HIGH;
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
NotificationChannel mChannel = new NotificationChannel(
channelId, channelName, importance);
notificationManager.createNotificationChannel(mChannel);
}
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(context, channelId)
.setSmallIcon(R.drawable.ic_baseline_notifications_active_24)
.setContentTitle(title)
.setContentText(body);
TaskStackBuilder stackBuilder = TaskStackBuilder.create(context);
stackBuilder.addNextIntent(intent);
PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(
0,
PendingIntent.FLAG_UPDATE_CURRENT
);
mBuilder.setContentIntent(resultPendingIntent);
notificationManager.notify(notificationId, mBuilder.build());
}
要显示通知，您需要做的就是调用函数：
showNotification(getApplicationContext(),"This is the title", "This is the body", getIntent());