单击"通知"后打开应用程序

Question

我的应用程序中有一个通知,其中包含以下代码:

//Notification Start

   notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

   int icon = R.drawable.n1; 
   CharSequence tickerText = "Call Blocker";
   long when = System.currentTimeMillis(); //now
   Notification notification = new Notification(icon, tickerText, when);
   Intent notificationIntent = new Intent(context, Main.class);
   PendingIntent contentIntent = PendingIntent.getActivity(context, 0, notificationIntent, 0);

   Context context = getApplicationContext();
   CharSequence title = "Call Blocker";
   text = "Calls will be blocked while driving";

   notification.setLatestEventInfo(context, title, text, contentIntent);

   notification.flags |= Notification.FLAG_ONGOING_EVENT;
   notification.flags |= Notification.FLAG_SHOW_LIGHTS;
   notificationManager.notify(1, notification);

}

我的通知触发得非常好,但我的问题是,当我点击通知中心的通知时,它无法启动我的应用.

基本上,点击我的通知后没有任何反应!我应该怎么做,以便在点击我的通知后开始我的主要活动.谢谢.

Answer 1

见下面的代码.我正在使用它,它正在打开我的HomeActivity.

    NotificationManager notificationManager = (NotificationManager) context
            .getSystemService(Context.NOTIFICATION_SERVICE);
    Notification notification = new Notification(icon, message, when);

    Intent notificationIntent = new Intent(context, HomeActivity.class);

    notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP
            | Intent.FLAG_ACTIVITY_SINGLE_TOP);

    PendingIntent intent = PendingIntent.getActivity(context, 0,
            notificationIntent, 0);

    notification.setLatestEventInfo(context, title, message, intent);
    notification.flags |= Notification.FLAG_AUTO_CANCEL;
    notificationManager.notify(0, notification);

Answer 2

这是使用NotificationCompact.Builder类的示例,它是构建通知的最新版本.

private void startNotification() {
    Log.i("NextActivity", "startNotification");

 // Sets an ID for the notification
      int mNotificationId = 001;

    // Build Notification , setOngoing keeps the notification always in status bar
    NotificationCompat.Builder mBuilder =
            new NotificationCompat.Builder(this)
                    .setSmallIcon(R.drawable.ldb)
                    .setContentTitle("Stop LDB")
                    .setContentText("Click to stop LDB")
                    .setOngoing(true);

    // Create pending intent, mention the Activity which needs to be 
    //triggered when user clicks on notification(StopScript.class in this case)

    PendingIntent contentIntent = PendingIntent.getActivity(this, 0,
            new Intent(this, StopScript.class), PendingIntent.FLAG_UPDATE_CURRENT);


    mBuilder.setContentIntent(contentIntent);


    // Gets an instance of the NotificationManager service
   NotificationManager mNotificationManager =
            (NotificationManager) this.getSystemService(Context.NOTIFICATION_SERVICE);


    // Builds the notification and issues it.
    mNotificationManager.notify(mNotificationId, mBuilder.build());


}

Answer 3

请使用下面的代码作为简单通知的完整示例,在此代码中您可以在点击通知后打开应用程序,它将解决您的问题.

public class AndroidNotifications extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        Button notificationButton = (Button) findViewById(R.id.notificationButton);

        notificationButton.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                Timer timer = new Timer();
                timer.schedule(new TimerTask() {
                    @Override
                    public void run() {
                        // Notification Title and Message
                        Notification("Dipak Keshariya (Android Developer)",
                                "This is Message from Dipak Keshariya (Android Developer)");
                    }
                }, 0);
            }
        });
    }

    // Notification Function
    private void Notification(String notificationTitle,
            String notificationMessage) {
        NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
        android.app.Notification notification = new android.app.Notification(
                R.drawable.ic_launcher, "Message from Dipak Keshariya! (Android Developer)",
                System.currentTimeMillis());

        Intent notificationIntent = new Intent(this, AndroidNotifications.class);
        PendingIntent pendingIntent = PendingIntent.getActivity(this, 0,
                notificationIntent, 0);

        notification.setLatestEventInfo(AndroidNotifications.this,
                notificationTitle, notificationMessage, pendingIntent);
        notificationManager.notify(10001, notification);
    }
}

有关更多信息,请参阅以下链接.

简单的通知示例

Answer 4

看起来你错过了这部分,

notification.contentIntent = pendingIntent;

尝试添加它,它应该工作.

Answer 5

用这个：

    Notification mBuilder =
            new NotificationCompat.Builder(this)
                    .setSmallIcon(R.drawable.ic_music)
                    .setContentTitle(songName).build();


    mBuilder.contentIntent=  PendingIntent.getActivity(this, 0,
            new Intent(this, MainActivity.class), PendingIntent.FLAG_UPDATE_CURRENT);

单击通知时，contentIntent 将负责打开活动

Answer 6

使用以下代码为开放活动创建通知.这个对我有用. 完整代码

 Intent myIntent = new Intent(context, DoSomething.class);
 PendingIntent pendingIntent = PendingIntent.getActivity(
        context, 
        0, 
        myIntent, 
        Intent.FLAG_ACTIVITY_NEW_TASK);

 myNotification = new NotificationCompat.Builder(context)
   .setContentTitle("Exercise of Notification!")
   .setContentText("Do Something...")
   .setTicker("Notification!")
   .setWhen(System.currentTimeMillis())
   .setContentIntent(pendingIntent)
   .setDefaults(Notification.DEFAULT_SOUND)
   .setAutoCancel(true)
   .setSmallIcon(R.drawable.ic_launcher)
   .build();

 notificationManager = 
   (NotificationManager)context.getSystemService(Context.NOTIFICATION_SERVICE);
 notificationManager.notify(MY_NOTIFICATION_ID, myNotification);

Answer 7

public void addNotification()
{
    NotificationCompat.Builder mBuilder=new NotificationCompat.Builder(MainActivity.this);
    mBuilder.setSmallIcon(R.drawable.email);
    mBuilder.setContentTitle("Notification Alert, Click Me!");
    mBuilder.setContentText("Hi,This notification for you let me check");
    Intent notificationIntent = new Intent(this,MainActivity.class);
    PendingIntent conPendingIntent = PendingIntent.getActivity(this,0,notificationIntent,PendingIntent.FLAG_UPDATE_CURRENT);

    mBuilder.setContentIntent(conPendingIntent);

    NotificationManager manager=(NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);
    manager.notify(0,mBuilder.build());
    Toast.makeText(MainActivity.this, "Notification", Toast.LENGTH_SHORT).show();

}

Answer 8

Android 12 及以上版本的通知代码：

如果您的应用面向 Android 12，则必须指定应用创建的每个 PendingIntent 对象的可变性。此附加要求可提高应用程序的安全性。

Android 12 之前

PendingIntent contentIntent = PendingIntent.getActivity(context, (int) System.currentTimeMillis(), notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);

对于安卓 12：

PendingIntent contentIntent = PendingIntent.getActivity(context, (int) System.currentTimeMillis(), notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT | PendingIntent.FLAG_IMMUTABLE);

首先创建频道：

 @RequiresApi(api = Build.VERSION_CODES.O)
private synchronized String createChannel() {
    NotificationManager mNotificationManager = (NotificationManager) this.getSystemService(Context.NOTIFICATION_SERVICE);

    String name = "dummy text for channel";
    int importance = NotificationManager.IMPORTANCE_LOW;

    NotificationChannel mChannel = new NotificationChannel("channel name, name, importance);
    mChannel.setShowBadge(false);
    mChannel.enableLights(true);
    mChannel.setLightColor(Color.BLUE);
    if (mNotificationManager != null) {
        mNotificationManager.createNotificationChannel(mChannel);
    } else {
        stopSelf();
    }
    return "Channel";
}

通知示例：

String channel="";
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
            channel = createChannel();
        else {
            channel = "";
        }

    RemoteViews mContentView = new RemoteViews(getApplicationContext().getPackageName(), R.layout.general_notification_layout_new);

    NotificationManager mNotificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
    NotificationCompat.Builder builder = new NotificationCompat.Builder(context, channel);
    Intent notificationIntent = new Intent(getApplicationContext(), MainActivity.class);
    notificationIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
    notificationIntent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);

    PendingIntent contentIntent = PendingIntent.getActivity(context, (int) System.currentTimeMillis(), notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT | PendingIntent.FLAG_IMMUTABLE);

    builder.setSmallIcon(R.drawable.notification_small_icon_one)
            .setPriority(NotificationCompat.PRIORITY_HIGH)
            .setSound(notificationSound)
            .setColor(ContextCompat.getColor(this, R.color.colorPrimary))
            .setCustomContentView(mContentView)
            .setCustomBigContentView(mContentView)
            .setContentIntent(contentIntent);


    builder.setAutoCancel(true);

    Notification notification = builder.build();
    mNotificationManager.notify(notificationId, notification);