FCM通知，当应用程序在前台而不是后台时点击通知

Question

MainActivity.java

public class MainActivity extends AppCompatActivity {

    private WebView mWebView;

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

        mWebView = (WebView) findViewById(R.id.webview);

        // Enable Javascript
        WebSettings webSettings = mWebView.getSettings();
        webSettings.setJavaScriptEnabled(true);

        Intent intent = getIntent();
        Bundle extras = intent.getExtras();

        if(extras != null){
            if (extras.containsKey("URL")) {
                // extract the extra-data in the Notification
                String url = extras.getString("URL");
                mWebView.loadUrl(url);
            } else {
                mWebView.loadUrl("http://example.com/");
            }
        } else {
            mWebView.loadUrl("http://example.com/");
        }

        // Stop local links and redirects from opening in browser instead of WebView
        mWebView.setWebViewClient(new MyAppWebViewClient());
    }

    @Override
    public void onBackPressed() {
        if(mWebView.canGoBack()) {
            mWebView.goBack();
        } else {
            super.onBackPressed();
        }
    }
}

MyFirebaseMessagingService.java

public class MyFirebaseMessagingService extends FirebaseMessagingService {

    private static final String TAG = "MyFirebaseMsgService";

    @Override
    public void onMessageReceived(RemoteMessage remoteMessage) {
        //Displaying data in log
        //It is optional
        Log.d(TAG, "From: " + remoteMessage.getFrom());
        Log.d(TAG, "Notification Message Body: " + remoteMessage.getNotification().getBody());

        //Calling method to generate notification
        sendNotification(remoteMessage.getNotification().getBody());
    }

    //This method is only generating push notification
    //It is same as we did in earlier posts
    private void sendNotification(String messageBody) {
        Intent intent = new Intent(this, MainActivity.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent,
                PendingIntent.FLAG_ONE_SHOT);

        Log.d("BODY", messageBody);

        Uri defaultSoundUri= RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
        NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
                .setSmallIcon(R.mipmap.ic_launcher)
                .setContentTitle("Firebase Push Notification")
                .setContentText(messageBody)
                .setAutoCancel(true)
                .setSound(defaultSoundUri)
                .setContentIntent(pendingIntent);

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

        notificationManager.notify(0, notificationBuilder.build());
    }
}

我的应用程序正在使用 WebView，并希望有一些 Notification 函数将用户引导到 HTTP 页面，使用 Firebase 云消息传递通知。

我正在使用 Firebase 控制台并使用自定义数据发送通知（参见图 1）。

使用上面的代码，如果应用程序没有打开或在后台，当用户点击通知时，我成功地将用户引导到页面，但是如果应用程序在前台打开，但它不起作用。

我相信我应该添加 getExtras() 和 extra.getString("URL") 的东西而不是 onCreate 方法，但我不知道在哪里添加，像 onResume 或什么？

我不是 Android 开发人员，但我目前的任务是完成将网站嵌入到带有通知的应用程序中。谢谢！

Answer 1

我找到了解决方案，在 MyFirebaseMessagingService.java 添加了几行代码，它适用于前台和后台的应用程序

不确定这样做是否正确

MyFirebaseMessagingService.java

import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.media.RingtoneManager;
import android.net.Uri;
import android.support.v4.app.NotificationCompat;
import com.google.firebase.messaging.FirebaseMessagingService;
import com.google.firebase.messaging.RemoteMessage;

public class MyFirebaseMessagingService extends FirebaseMessagingService {

    @Override
    public void onMessageReceived(RemoteMessage remoteMessage) {
        String link = null;

        if (remoteMessage.getData().containsKey("URL")) {
            link = remoteMessage.getData().get("URL");
        }

        //Calling method to generate notification
        sendNotification(remoteMessage.getNotification().getBody(), link);
    }

    //This method is only generating push notification
    //It is same as we did in earlier posts
    private void sendNotification(String messageBody, String link) {
        Intent intent = new Intent(this, MainActivity.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        if (link != null) {
            intent.putExtra("URL", link);
        }

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

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

        NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this);
            notificationBuilder.setSmallIcon(R.mipmap.ic_launcher);
            notificationBuilder.setContentTitle("THE APP NAME");
            notificationBuilder.setContentText(messageBody);
            notificationBuilder.setAutoCancel(true);
            notificationBuilder.setSound(defaultSoundUri);
            notificationBuilder.setContentIntent(pendingIntent);

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

        notificationManager.notify(0, notificationBuilder.build());
    }
}