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依据Google官方提供解决方案，使用全局通知来适配：

 

在来电监听的在Service中添加如下代码

**

 * 启动通知  */ private void startForegroundNotification(final int call_id, final String phone) {     // 构建通知栏构造器     NotificationCompat.Builder mBuilder;

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {

        NotificationChannel channel = new NotificationChannel(CHANNEL_ID,                 "ForegroundNotificationChannel", NotificationManager.IMPORTANCE_HIGH);         mNotificationManager.createNotificationChannel(channel);     }     mBuilder = new NotificationCompat.Builder(this, CHANNEL_ID);     // 给构造器设置参数     Intent fullScreenIntent = new Intent(this, CallActivity.class);     fullScreenIntent.putExtra(CallActivity.EXTRA_CALL_NUM, phone);     fullScreenIntent.putExtra(CallActivity.EXTRA_CALL_ID, call_id);     fullScreenIntent.putExtra(CallActivity.EXTRA_CALL_TYPE, CallActivity.CALL_IN);     PendingIntent fullScreenPendingIntent = PendingIntent.getActivity(             this, 0, fullScreenIntent, PendingIntent.FLAG_UPDATE_CURRENT);

    mBuilder.setSmallIcon(R.mipmap.ic_launcher_round)

            .setContentTitle("来电")             .setContentText(phone + "来电")             .setChannelId(CHANNEL_ID)             .setPriority(NotificationCompat.PRIORITY_HIGH)             .setCategory(NotificationCompat.CATEGORY_CALL)             .setFullScreenIntent(fullScreenPendingIntent, true);

    mNotificationManager.notify(NOTICE_ID_CALLING, mBuilder.build());

}

通话结束关闭前台通知：

mNotificationManager.cancel(NOTICE_ID_CALLING);// 接通/挂断停止通知

注意：使用全屏通知需要添加<uses-permission android:name="android.permission.USE_FULL_SCREEN_INTENT" />权限，使用前台Service 需要添加<uses-permission android:name="android.permission.FOREGROUND_SERVICE" />权限。

补充（自定义通知栏）

// 自定义通知栏视图

RemoteViews remoteViews = new RemoteViews(getPackageName(), R.layout.custom_notification); // 接听点击处理 fullScreenIntent.putExtra(CallActivity.EXTRA_CALL_ANSWER, true); PendingIntent answerPendingIntent = PendingIntent.getActivity(         this, (int) SystemClock.uptimeMillis(), fullScreenIntent, PendingIntent.FLAG_UPDATE_CURRENT); remoteViews.setOnClickPendingIntent(R.id.btn_answer, answerPendingIntent); // 广播的形式处理挂断 Intent intent1 = new Intent("com.union.sdkdemo.action_close_incall_notice"); intent1.putExtra("CALL_ID", call_id); intent1.putExtra("NOTICE_ID", NOTICE_ID_CALLING); PendingIntent pendingIntent1 = PendingIntent.getBroadcast(this, (int) SystemClock.uptimeMillis(), intent1, PendingIntent.FLAG_UPDATE_CURRENT); remoteViews.setOnClickPendingIntent(R.id.btn_hangup, pendingIntent1);

mBuilder.setVisibility(NotificationCompat.VISIBILITY_PUBLIC)

              .setCustomHeadsUpContentView(remoteViews);

 

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