使用onesignal和firebase在设备之间推送通知

Question

我正在构建一个有趣的小项目，它包含一个小型应用程序，该应用程序可以将通知从设备发送到另一个设备。目前，我正在为我的女朋友构建此应用程序，以便她只需按一下按钮就可以直接向我的手机发送通知。该应用程序在某些方面可以完美运行。如果我在同一系统上使用同一部手机，则可以正常运行，但是如果出现版本差距，则它不会接收或发送通知，此刻，我正在使用运行9.0版android的模拟器进行测试和我自己的6.0手机，我可以向模拟器发送通知，但是模拟器无法向我发送通知。

我正在尝试使其在我的6.0版本和8.0版本上运行。目前，使其正常工作的唯一方法是让2个Android的版本为9（pie）。

这就是我用来发送通知的内容。

private void sendNotification()
    {
        AsyncTask.execute(new Runnable() {
            @Override
            public void run() {
                int SDK_INT = android.os.Build.VERSION.SDK_INT;
                if (SDK_INT > 8) {
                    StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder()
                            .permitAll().build();
                    StrictMode.setThreadPolicy(policy);
                    String send_email;


                    if (MainActivity.LoggedIn_User_Email.equals("user1@gmail.com")) {
                        send_email = "user2@gmail.com";
                    } else {
                        send_email = "user1@gmail.com";
                    }

                    try {
                        String jsonResponse;

                        URL url = new URL("https://onesignal.com/api/v1/notifications");
                        HttpURLConnection con = (HttpURLConnection) url.openConnection();
                        con.setUseCaches(false);
                        con.setDoOutput(true);
                        con.setDoInput(true);

                        con.setRequestProperty("Content-Type", "application/json; charset=UTF-8");
                        con.setRequestProperty("Authorization", "Basic MTY4MzQ4OTQtYTU1MC00Y2VkLTk5YjgtMjE3OTU2ODFmMzZm");
                        con.setRequestMethod("POST");

                        String strJsonBody = "{"
                                + "\"app_id\": \"5efc856c-684c-4e67-8380-38d74811b638\","

                                + "\"filters\": [{\"field\": \"tag\", \"key\": \"User_ID\", \"relation\": \"=\", \"value\": \"" + send_email + "\"}],"

                                + "\"data\": {\"foo\": \"bar\"},"
                                + "\"contents\": {\"en\": \"I need attention!! NOW!\"}"
                                + "}";


                        System.out.println("strJsonBody:\n" + strJsonBody);

                        byte[] sendBytes = strJsonBody.getBytes("UTF-8");
                        con.setFixedLengthStreamingMode(sendBytes.length);

                        OutputStream outputStream = con.getOutputStream();
                        outputStream.write(sendBytes);

                        int httpResponse = con.getResponseCode();
                        System.out.println("httpResponse: " + httpResponse);

                        if (httpResponse >= HttpURLConnection.HTTP_OK
                                && httpResponse < HttpURLConnection.HTTP_BAD_REQUEST) {
                            Scanner scanner = new Scanner(con.getInputStream(), "UTF-8");
                            jsonResponse = scanner.useDelimiter("\\A").hasNext() ? scanner.next() : "";
                            scanner.close();
                        } else {
                            Scanner scanner = new Scanner(con.getErrorStream(), "UTF-8");
                            jsonResponse = scanner.useDelimiter("\\A").hasNext() ? scanner.next() : "";
                            scanner.close();
                        }
                        System.out.println("jsonResponse:\n" + jsonResponse);

                    } catch (Throwable t) {
                        t.printStackTrace();
                    }
                }
            }
        });
    }

这是我的依赖关系

dependencies
{ 
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:28.0.0'
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
implementation 'com.google.firebase:firebase-auth:16.1.0'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.2'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
implementation 'com.google.firebase:firebase-core:16.0.6'
implementation 'com.onesignal:OneSignal:3.10.6' 
}