Java 如何通过单击按钮在应用程序图标上设置通知编号?
我想通过单击按钮在应用程序图标上设置通知编号。我试图理解并遵循几种方法,但没有一种有效 我可以使用简单的频道发送通知,但我还想在应用程序图标上设置通知号码 下面是我的代码:Java 如何通过单击按钮在应用程序图标上设置通知编号?,java,android,android-notifications,mobile-application,Java,Android,Android Notifications,Mobile Application,我想通过单击按钮在应用程序图标上设置通知编号。我试图理解并遵循几种方法,但没有一种有效 我可以使用简单的频道发送通知,但我还想在应用程序图标上设置通知号码 下面是我的代码: public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceS
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button Gn = (Button) findViewById(R.id.gn);
Gn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
shownotifications();
}
});
}
private void shownotifications() {
//channel
String id = "main_channel";
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
CharSequence name = "Channel Name";
String description = "Channel Description";
int importance = NotificationManager.IMPORTANCE_HIGH;
NotificationChannel notificationChannel = new NotificationChannel(id, name, importance);
notificationChannel.setDescription(description);
notificationChannel.enableLights(true);
notificationChannel.setLightColor(Color.WHITE);
notificationChannel.enableVibration(false);
if (notificationManager != null) {
notificationManager.createNotificationChannel(notificationChannel);
}
}
//notifications
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this, id)
.setSmallIcon(R.mipmap.ic_launcher)
.setLargeIcon(BitmapFactory.decodeResource(getResources(), R.drawable.icon))
.setContentTitle("Notification Title")
.setContentText("This is the description of this notification......")
.setLights(Color.WHITE, 500, 5000)
.setColor(Color.RED)
.setDefaults(Notification.DEFAULT_SOUND);
Intent nI = new Intent(this, MainActivity.class);
PendingIntent contentIntent = PendingIntent.getActivity(this, 0, nI, PendingIntent.FLAG_UPDATE_CURRENT);
notificationBuilder.setContentIntent(contentIntent);
NotificationManagerCompat notificationManagerCompat = NotificationManagerCompat.from(this);
notificationManagerCompat.notify(1000, notificationBuilder.build());
}
}
您只能在每次更新通知号码时更改应用程序的图标 使用此链接 在按钮上设置计数每当您要更新计数用户上一次计数递增时,单击此按钮