如何在通知中获取和设置变量？（Android）

Question

我正在使用云服务提供商（FIREBASE），我在这个过程中得到了股票。 1。在应用上发送消息。将计算numMessages中的通知。 代码就像：

int numMessage:

然后是二传手：

message.setnumMessage(numMessages);

然后是柜台：

numMessages++

现在我的firebase聊天的结构将是输出，

name:test
numMessages:1
readCount:0

现在我想要的是当我点击Pending intent活动时。 readCount将被更改为numMessages的值。 在这种情况下，当我点击通知时，readCount必须更改为1，因为numMessages的值为1.

PendingIntent pIntent =
    PendingIntent.getActivity(MainActivity.this, 0, new Intent(MainActivity.this, MainActivity.class), 0);
pIntent.equals(readCount=numMessages);

if (numMessages > 0 && targetId == R.id.button) {
    Notification noti = new Notification.Builder(MainActivity.this)
        .setTicker("You Have " + numMessages + " message")
        .setContentTitle("test")
        .setContentText("")
        .setSmallIcon(R.drawable.ic_od_icon_24dp)
        .setContentIntent(pIntent).getNotification();
    noti.defaults |= Notification.DEFAULT_SOUND;
    noti.defaults |= Notification.DEFAULT_VIBRATE;
    noti.ledARGB = Color.BLUE;
    noti.ledOnMS = LED_ON_MS;
    noti.ledOffMS = LED_OFF_MS;
    noti.flags = Notification.FLAG_SHOW_LIGHTS;
    NotificationManager nm = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
    nm.notify(NOTIFICATION_ID, noti);
}

Answer 1

修改 您希望每次接收通知，更改numMessages的值，以及应用程序中的某个位置，将numMessages的值更新为readCount？ 如果我理解您的问题，可以尝试以下步骤：

一个。创建接收器以在接收通知时进行处理

B中。从通知中获取变量的值：

1. 您可以对numMessages使用静态变量，并在其他readCount上引用它。
2. 或者，使用数据库或SharedPreference

并且，将值设置为通知：

类似于从通知中获取价值。使用静态变量或数据库或SharedPreference

一些示例代码：

MainActivity.class：

public class MainActivity extends Activity {

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }
    public void onGenNoti(View v) {

        // Check readCount
        Variables.readCount = Variables.numMessages;

        PendingIntent pIntent =
                PendingIntent.getActivity(MainActivity.this, 0, new Intent(MainActivity.this, MainActivity.class), 0);

            if (Variables.numMessages > 0) {
                Notification noti = new Notification.Builder(MainActivity.this)
                    .setTicker("You Have " + Variables.numMessages + " message")
                    .setContentTitle("test")
                    .setContentText("")
                    .setSmallIcon(R.drawable.ic_od_icon_24dp)
                    .setContentIntent(pIntent).getNotification();
                noti.defaults |= Notification.DEFAULT_SOUND;
                noti.defaults |= Notification.DEFAULT_VIBRATE;
                noti.ledARGB = Color.BLUE;
                noti.ledOnMS = LED_ON_MS;
                noti.ledOffMS = LED_OFF_MS;
                noti.flags = Notification.FLAG_SHOW_LIGHTS;
                NotificationManager nm = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
                nm.notify(NOTIFICATION_ID, noti);
            }
    }
}

main.xml中：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <Button 
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Generate Noti"
        android:onClick="onGenNoti"/>
</LinearLayout>

Variables.class

public class Variables {
    public static int numMessages;
    public static int readCount;
}

Receiver.class：

public class Receiver extends BroadcastReceiver {

    private static final Object ACTION = "MyNotification";

    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if (ACTION.equals(action)) {
            //do what you want here
            Variables.numMessages++;
            generateNotification(context,"MyNotification");
        }
    }

    private void generateNotification(Context context, String message) {
          long when = System.currentTimeMillis();
          int icon = R.drawable.ic_launcher;
          NotificationManager notificationManager = (NotificationManager) context
            .getSystemService(Context.NOTIFICATION_SERVICE);
          Notification notification = new Notification(icon, message, when);
          String title = context.getString(R.string.app_name);
          // String subTitle = context.getString(R.string.app_name);
          String subTitle = "some text";
          Intent notificationIntent = new Intent(context, MainActivity.class);
          notificationIntent.putExtra("content", message);
          PendingIntent intent = PendingIntent.getActivity(context, 0,notificationIntent, 0);
          notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP
            | Intent.FLAG_ACTIVITY_SINGLE_TOP);

          notification.setLatestEventInfo(context, title, subTitle, intent);
          //To play the default sound with your notification:
          //notification.defaults |= Notification.DEFAULT_SOUND;
          notification.flags |= Notification.FLAG_AUTO_CANCEL;
          notification.defaults |= Notification.DEFAULT_VIBRATE;
          notificationManager.notify(0, notification);
    }

}

最后，在Manifest中的应用程序标记中添加这些行

<receiver
            android:name="your.package.Receiver" >
            <intent-filter>
                <action android:name="MyNotification" />
            </intent-filter>
</receiver>