如何在 Android 應用程式中使用 firebase 訊息傳遞?
此示例演示瞭如何在 Android 應用程式中使用 firebase 訊息傳遞
步驟 1 − 在 Android Studio 中建立一個新專案,轉到檔案 ⇒ 新建專案,並填寫所有必需的詳細資訊以建立一個新專案。
步驟 2 − 將以下程式碼新增到 src/MainActivity.java
<?xml version = "1.0" encoding = "utf-8"?>
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
public class MainActivity extends FragmentActivity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}步驟 3 − 將以下程式碼新增到 src/ MyFirebaseMessagingService.java
<?xml version = "1.0" encoding = "utf-8"?>
import android.app.Notification;
import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.content.Context;
import android.graphics.Color;
import android.os.Build;
import android.support.v4.app.NotificationCompat;
import android.support.v4.content.ContextCompat;
import android.util.Log;
import com.google.firebase.messaging.FirebaseMessagingService;
import com.google.firebase.messaging.RemoteMessage;
import org.json.JSONObject;
import java.util.Map;
public class MyFirebaseMessagingService extends FirebaseMessagingService {
@Override
public void onNewToken(String s) {
Log.e("NEW_TOKEN", s);
}
@Override
public void onMessageReceived(RemoteMessage remoteMessage) {
Map<String, String> params = remoteMessage.getData();
JSONObject object = new JSONObject(params);
Log.e("JSON_OBJECT", object.toString());
String NOTIFICATION_CHANNEL_ID = "sairam";
long pattern[] = {0, 1000, 500, 1000};
NotificationManager mNotificationManager =
(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
if (Build.VERSION.SDK_INT > = Build.VERSION_CODES.O) {
NotificationChannel notificationChannel = new NotificationChannel(NOTIFICATION_CHANNEL_ID, "Your Notifications",
NotificationManager.IMPORTANCE_HIGH);
notificationChannel.setDescription("");
notificationChannel.enableLights(true);
notificationChannel.setLightColor(Color.RED);
notificationChannel.setVibrationPattern(pattern);
notificationChannel.enableVibration(true);
mNotificationManager.createNotificationChannel(notificationChannel);
}
// to diaplay notification in DND Mode
if (Build.VERSION.SDK_INT > = Build.VERSION_CODES.O) {
NotificationChannel channel = mNotificationManager.getNotificationChannel(NOTIFICATION_CHANNEL_ID);
channel.canBypassDnd();
}
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this, NOTIFICATION_CHANNEL_ID);
notificationBuilder.setAutoCancel(true)
.setColor(ContextCompat.getColor(this, R.color.colorAccent))
.setContentTitle(getString(R.string.app_name))
.setContentText(remoteMessage.getNotification().getBody())
.setDefaults(Notification.DEFAULT_ALL)
.setWhen(System.currentTimeMillis())
.setSmallIcon(R.drawable.ic_launcher_background)
.setAutoCancel(true);
mNotificationManager.notify(1000, notificationBuilder.build());
}
}讓我們嘗試執行應用程式。我假設你已將安卓移動裝置連線至電腦。從 Android Studio 執行應用程式,開啟專案的一個 activity 檔案,並點選工具欄中的執行
圖示。選擇移動裝置作為選項,然後檢視顯示預設螢幕的移動裝置 –

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