Intent.setClass 在 android

Question

我正在开发 android 应用程序，我在其中以编程方式创建通知，如下所示：

 public void createNotification()
    {
        Intent intent=new Intent().setClass(IncomingCallScreen.this,IncomingCallScreen.class);
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        intent.addFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);

        PendingIntent contentIntent = PendingIntent.getActivity(IncomingCallScreen.this, 0, intent,0);

        Notification notification = new NotificationCompat.Builder(this)
                .setContentTitle("Incoming call")
                .setContentText("there is a call running")
                .setSmallIcon(R.drawable.answer)
                .setAutoCancel(true)
                .addAction(R.drawable.reject, "HangUp", contentIntent)
                .setContentIntent(contentIntent)
                .build();
        NotificationManager notificationManager =
                (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
        notificationManager.notify(1, notification);
    }

这个函数在onpause状态下被调用我想做的是当activity处于onpause并且用户点击通知时activity可以像whatsapp一样再次出现在我接受的时候一个电话，如果我返回或按主页，则会显示一条通知以再次显示呼叫屏幕。但是当我按下通知时，应用程序关闭了！

注意：上下文与我想去的 class 相同（可能是这个问题）也存在 lunchMode:SinleTop 这个 activity

Answer 1

试试这个，

private static void generateNotification(Context context, String message) {
        int icon = R.drawable.ic_launcher;
        long when = System.currentTimeMillis();
        NotificationManager notificationManager = (NotificationManager) context
                .getSystemService(Context.NOTIFICATION_SERVICE);
        Notification notification = new Notification(icon, message, when);
        String title = context.getString(R.string.app_name);
        Intent notificationIntent = new Intent(context, Second.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;
        // Play default notification sound
        notification.defaults |= Notification.DEFAULT_SOUND;
        // notification.defaults |= Notification.DEFAULT_LIGHTS;
        //
        // notification.ledARGB = 0xff00ff00;
        // notification.ledOnMS = 300;
        // notification.ledOffMS = 1000;
        // notification.defaults |= Notification.FLAG_SHOW_LIGHTS;

        // Vibrate if vibrate is enabled
        // notification.defaults |= Notification.DEFAULT_VIBRATE;

        PowerManager pm = (PowerManager) context
                .getSystemService(Context.POWER_SERVICE);

        boolean isScreenOn = pm.isScreenOn();

        Log.e("screen on.................................", "" + isScreenOn);

        if (isScreenOn == false) 
        {

            WakeLock wl = pm.newWakeLock(PowerManager.FULL_WAKE_LOCK
                    | PowerManager.ACQUIRE_CAUSES_WAKEUP
                    | PowerManager.ON_AFTER_RELEASE, "MyLock");

            wl.acquire(10000);
            WakeLock wl_cpu = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,
                    "MyCpuLock");

            wl_cpu.acquire(10000);
        }
        notificationManager.notify(0, notification);
    }

Answer 2

从 0 变为 PendingIntent.FLAG_CANCEL_CURRENT PendingIntent contentIntent = PendingIntent.getActivity(IncomingCallScreen.this, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT); 解决了问题

public void createNotification()
    {
        Intent intent=new Intent(IncomingCallScreen.this,IncomingCallScreen.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);
        PendingIntent contentIntent = PendingIntent.getActivity(IncomingCallScreen.this, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT);

        Notification notification = new NotificationCompat.Builder(IncomingCallScreen.this)
                .setContentTitle("Incoming call")
                .setContentText("there is a call running")
                .setSmallIcon(R.drawable.answer)
                .setAutoCancel(true)
                .addAction(R.drawable.reject, "HangUp", contentIntent)
                .setContentIntent(contentIntent)
                .build();
        NotificationManager notificationManager =
                (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
        notificationManager.notify(1, notification);
    }

Intent.setClass 在 android

Intent.setClass in android

notifications

android