通知单击：活动已打开-Java 学习之路

139

我有一个带有通知的应用程序，如果我点击它们就会打开某个活动 . 我想要的是，如果我点击通知并且活动已经打开，那么 not 再次启动，但只是被带到了前面 .

我以为我可以用旗帜 FLAG_ACTIVITY_BROUGHT_TO_FRONT 或 FLAG_ACTIVITY_REORDER_TO_FRONT 来做，但它会继续打开它，所以我有两次活动 .

这是我的代码：

event_notification = new Notification(R.drawable.icon,
            mContext.getString(R.string.event_notif_message), System.currentTimeMillis()); 
Intent notificationIntent = new Intent(mContext, EventListActivity.class);
notificationIntent.setFlags(Intent.FLAG_ACTIVITY_BROUGHT_TO_FRONT);
sendNotification(event_notification, notificationIntent, mContext.getString(R.string.event_notif_title),
                body, Utils.PA_NOTIFICATIONS_ID);

我可以使用标志管理它，还是应该在SharedPreferences中存储变量以检查它是否已打开？

谢谢！

6 回答

2

您需要设置 Activity 的 launchMode 属性，您将开始 singleTop . 这将导致传入的Intent传递到现有实例，而不是在 Activity 已经位于任务堆栈顶部时启动新实例 .

通过将 android:launchMode="singleTop" 添加到 <activity> 元素，可以在清单中完成此操作 . 要访问最新的Intent（如果您对可能传入的任何数据感兴趣），请覆盖 Activity 中的 onNewIntent() .

回复于 2024-04-29T12:23:12+08:00
248

尝试将标志设置为 Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP .

来自documentation for FLAG_ACTIVITY_CLEAR_TOP（强调我的）：

如果已设置，并且正在启动的活动已在当前任务中运行，则不会启动该活动的新实例，而是将关闭其上的所有其他活动，并将此Intent传递给（现在在顶部）旧活动作为一个新的意图 . 例如，考虑一个由活动组成的任务：A，B，C，D . 如果D调用带有解析为活动B组件的Intent的startActivity（），则C和D将完成，B接收给定的Intent ，导致堆栈现在为：A，B . 上例中活动B的当前运行实例将在其onNewIntent（）方法中接收您从此处开始的新意图，或者本身已完成并使用新意图重新启动 . 如果它已将其启动模式声明为“多个”（默认值）并且您没有在同一意图中设置FLAG_ACTIVITY_SINGLE_TOP，那么它将被完成并重新创建;对于所有其他启动模式或如果设置了FLAG_ACTIVITY_SINGLE_TOP，则此Intent将被传递到当前实例的onNewIntent（） .

回复于 2024-04-29T12:23:12+08:00
1

使用 onNewIntent() 处理来自通知点击的新数据并刷新活动 .

在 onNewIntent 中从新意图（由新通知提供服务）中获取新数据并捕获它们，例如：

title = intent.getStringExtra("title")

在 onCreate 之前:)

它将使用新的通知数据刷新当前活动 .

您也可以按照本教程：http://androidrace.com/2016/12/10/how-to-refresh-activity-on-new-notification-click-android-developer/

回复于 2024-04-29T12:23:12+08:00

Notification.Builder mBuilder =
            new Notification.Builder(this)
            .setSmallIcon(R.drawable.cmplayer)
            .setContentTitle("CoderoMusicPlayer")
            .setContentText("PLayer0!");

    Intent resultIntent = new Intent(this, 

    AndroidBuildingMusicPlayerActivity.class);
        resultIntent.setAction(Intent.ACTION_MAIN);
        resultIntent.addCategory(Intent.CATEGORY_LAUNCHER);

        PendingIntent pendingIntent = PendingIntent.getActivity(this, 0,
                resultIntent, 0);

        mBuilder.setContentIntent(pendingIntent);
        NotificationManager mNotificationManager =
            (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
        mNotificationManager.notify(1, mBuilder.build());

只需复制代码并将其粘贴到主启动器活动中即可 .

Here is Original Answer

回复于 2024-04-29T12:23:12+08:00

Intent intent = new Intent(this, MainActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
PendingIntent contentIntent = PendingIntent.getActivity(this, new Random().nextInt(), intent, 0);

回复于 2024-04-29T12:23:12+08:00

我认为你应该添加一些逻辑来使它工作，也许这可以帮助：

For example I have a Splash Screen (Launcher and MAIN) of APP:

public class SplashScreen extends AppCompatActivity {
    private final int TIME_OUT = 2000;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_splash_screen);

        // Suscribirse al tema Notificaciones
        FirebaseMessaging.getInstance().subscribeToTopic("NOTA");
        if (getIntent().getExtras() != null) {
            if (getIntent().getExtras().size()>1){
                Intent home_activity = new Intent(getApplicationContext(), Home.class);
                home_activity.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                if (getIntent().getExtras() != null) {
                    for (String key : getIntent().getExtras().keySet()) {
                        String value = "" + getIntent().getExtras().getString(key);
                        Log.d("TAG", key + "=" + value);
                        switch (key) {
                            case "url":
                                home_activity.putExtra("url", value);
                                break;
                        }
                    }
                }
                startActivity(home_activity);
                finish();

            }else{
                new Handler().postDelayed(new Runnable() {
                    @Override
                    public void run() {
                        try {
                            Intent home_activity = new Intent(getApplicationContext(), Home.class);
                            home_activity.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                            startActivity(home_activity);
                            finish();
                        } catch (Exception ex) {
                            ex.printStackTrace();
                        }
                    }
                }, TIME_OUT);
            }


        } else {
            new Handler().postDelayed(new Runnable() {
                @Override
                public void run() {
                    try {
                        Intent home_activity = new Intent(getApplicationContext(), Home.class);
                        home_activity.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                        startActivity(home_activity);
                        finish();
                    } catch (Exception ex) {
                        ex.printStackTrace();
                    }
                }
            }, TIME_OUT);
        }

    }

}

And in my FirebaseService I have done the following:

public class FCMessagingService extends FirebaseMessagingService {

    private final String TAG = "PUSH";
    private String body = "";
    private static String _url = "";
    private static int numMessage = 0;

    @Override
    public void onMessageReceived(RemoteMessage remoteMessage) {
        super.onMessageReceived(remoteMessage);

        String from = remoteMessage.getFrom();
        Log.d(TAG, "Mensaje recibido de: " + from);

        if (remoteMessage.getNotification() != null) {
            Log.d(TAG, "Notificación: " + remoteMessage.getNotification().getBody());

            if (remoteMessage.getData().size() > 0) {
                Log.d(TAG, "Data: " + remoteMessage.getData());
                try {
                    JSONObject data = new JSONObject(remoteMessage.getData());
                    String url = data.getString("url");
                    Log.d(TAG, "onMessageReceived: \n" + "Extra Information: " + url);
                    this._url = url;
                    Log.d("_URL",_url);
                    mostrarNotificacion(remoteMessage.getNotification().getTitle(), remoteMessage.getNotification().getBody());
                    mensaje(url, remoteMessage.getNotification().getTitle(), remoteMessage.getNotification().getBody());
                } catch (JSONException e) {
                    e.printStackTrace();
                }
            }
        }



    }


    private void mensaje(String url, String title, String body){
        boolean acti =  Util.comprobarActivityALaVista(getApplicationContext(), "com.dev.android.subagan.MainActivity");
        if(acti){

            Intent imain = new Intent(MainActivity.URL);

            imain.putExtra("key_url",url);
            imain.putExtra("key_title",title);
            imain.putExtra("key_body",body);

            LocalBroadcastManager.getInstance(getApplicationContext()).sendBroadcast(imain);

        }else{

            Intent ihome = new Intent(Home.URL);

            ihome.putExtra("key_url",url);
            ihome.putExtra("key_title",title);
            ihome.putExtra("key_body",body);
            LocalBroadcastManager.getInstance(getApplicationContext()).sendBroadcast(ihome);

        }

    }




    private void mostrarNotificacion(String title, String body) {

        final int NOTIFICATION_ID = 3000;

        Intent intent = new Intent(this, MainActivity.class);
        intent.putExtra("url",_url);
        intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);


        PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent,PendingIntent.FLAG_UPDATE_CURRENT | PendingIntent.FLAG_ONE_SHOT  );



        Uri soundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);

        NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
                .setSmallIcon(R.mipmap.ic_launcher)
                .setContentTitle(title)
                .setContentText(body)
                .setAutoCancel(true)
                .setSound(soundUri)
                .setTicker(body)
                .setContentIntent(pendingIntent);

        NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        notificationManager.notify(0, notificationBuilder.build());

    }

}

回复于 2024-04-29T12:23:12+08:00

通知单击：活动已打开

6 回答

相关问题