Question

我已经尝试了这3天的android通知工作，用户点击通知然后打开Activity。但每次我举杯，它都说是空的。尝试使用SOF的一些解决方案，但不起作用。你能看看代码有什么问题吗？提前谢谢。

通知代码是

private void sendPushNotification(JSONObject json) {
    //optionally we can display the json into log
    int notificationId = new Random().nextInt();

    Log.e(TAG, "Notification JSON " + json.toString());
    try {
        //getting the json data
        JSONObject data = json.getJSONObject("data");

        //parsing json data
        String title = data.getString("title");
        String message = data.getString("message");
        String imageUrl = data.getString("image");

        // Instantiate a Builder object.
        NotificationCompat.Builder builder = new NotificationCompat.Builder(this.getApplicationContext(),"Default");

        Intent notifyIntent = new Intent(this, MainActivity.class);
        notifyIntent.putExtra("fromNotification", true);
        // Sets the Activity to start in a new, empty task
        notifyIntent.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
        // Creates the PendingIntent
        PendingIntent pendingIntent =
                PendingIntent.getActivity(
                        this.getApplicationContext(), notificationId,
                        notifyIntent,
                        PendingIntent.FLAG_ONE_SHOT
                );

        //int id = 1;
        // Puts the PendingIntent into the notification builder
        builder.setContentIntent(pendingIntent);
        // Notifications are issued by sending them to the
        // NotificationManager system service.
        NotificationManager mNotificationManager =
                (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        // Builds an anonymous Notification object from the builder, and
        // passes it to the NotificationManager
        if (mNotificationManager != null) {
            mNotificationManager.notify(notificationId, builder.build());
        }


    } catch (JSONException e) {
        Log.e(TAG, "Json Exception: " + e.getMessage());
    } catch (Exception e) {
        Log.e(TAG, "Exception: " + e.getMessage());
    }
}

而mainActivity.class是

public class MainActivity extends AppCompatActivity {



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

    ActionBar actionBar = getSupportActionBar();
    if (actionBar != null) {
        actionBar.setElevation(0);
    }

    // Open Tab
    if(getIntent().getExtras() != null){

        Bundle b = getIntent().getExtras();
        boolean cameFromNotification = b.getBoolean("fromNotification");

        Toast.makeText(this.getApplicationContext(),
                "Error: " + getIntent().getExtras(),
                Toast.LENGTH_LONG).show();

        viewPager = findViewById(R.id.viewpager);
        setupViewPager(viewPager);

        tabLayout = findViewById(R.id.tabs);
        viewPager.setCurrentItem(1);
        tabLayout.setupWithViewPager(viewPager);
        setupTabIcons();

    }
    else {
        viewPager = findViewById(R.id.viewpager);
        setupViewPager(viewPager);

        tabLayout = findViewById(R.id.tabs);
        viewPager.setCurrentItem(0);
        tabLayout.setupWithViewPager(viewPager);
        setupTabIcons();

    }



}



@Override
protected void onNewIntent(Intent intent) {
    super.onNewIntent(intent);
    setIntent(intent);
} }

Answer 1

如果您在意图中添加了额外内容并且未在接收活动中收到，则可能有两个原因。

活动已经存在于android backstack中，并且附加内容未在onCreate（）中捕获，但可以在onNewIntent()
如果附加内容与PendingIntent的活动一起传递，那么根据官方文档。 http://developer.android.com/reference/android/app/PendingIntent.html。因此，要正确传递额外内容，您需要确保每个意图在操作，数据，类型方面存在差异，类和类别。或者，如果系统中存在使用 FLAG_CANCEL_CURRENT 或 FLAG_UPDATE_CURRENT ，则取消当前的PendingIntent。

Answer 2

将标志PendingIntent.FLAG_ONE_SHOT更改为PendingIntent.FLAG_UPDATE_CURRENT

PendingIntent pendingIntent =
            PendingIntent.getActivity(
                    this.getApplicationContext(), notificationId,
                    notifyIntent,
                    PendingIntent. FLAG_UPDATE_CURRENT
            );

如果我们使用intent extras，我们必须使用标志PendingIntent.FLAG_UPDATE_CURRENT调用PendingIntent.getActivity（），否则将为每个收到的通知重用相同的额外内容。

Answer 3

扩展BroadcastReceiver的{{1}}类。在onReceive（）

中输入以下代码

BroadcastReceiver

Intent intent2open = new Intent(context, YourActivity.class); intent2open.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); intent2open.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP); String name = "KEY"; String value = "String you want to pass"; intent2open.putExtra(name, value); context.startActivity(intent2open);确保应用程序在已打开时不会重新打开。这意味着＆＃34; old＆＃34;首先打开FLAG_ACTIVITY_SINGLE_TOP的意图被重新使用，它不会包含额外的值。您必须在YourActivity中的另一个名为onNewIntent()的方法中捕获它们。

YourActivity

请注意两个if语句 - public class YourActivity extends Activity { private String memberFieldString; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); // Code doing your thing... } // End of onCreate() @Override protected void onNewIntent(Intent intent) { Log.d("YourActivity", "onNewIntent is called!"); memberFieldString = intent.getStringExtra("KEY"); super.onNewIntent(intent); } // End of onNewIntent(Intent intent) @Override protected void onResume() { if (memberFieldString != null) { if (opstartsIntent.getStringExtra(KEY) != null) { Log.d("YourActivity", "memberFieldString: "+ memberFieldString); } else { Log.d("YourActivity", "The intent that started YourActivity did not have an extra string value"); } } } // End of onResume() } // End of YourActivity不知道它是否在onResume()之后调用

Answer 4

谢谢大家，最后我可以通过关注this post

让它发挥作用

我只使用通知，禁用从我的php服务器发送的通知并使用数据只做了技巧，我可以发送通知，mainActivity确实从意图中捕获Putextra。

Answer 5

如果在从最近状态或后台滑动应用程序时仍在寻找自定义数据（额外）firebase通知的人。

您可以在这里查看我的答案

https://github.com/firebase/quickstart-android/issues/96#issuecomment-449936698

从Firebase通知意图中获取额外的MainActivity

5 个答案: