当来电活动置于后台时返回呼叫 UI答案

【问题标题】：Return to call UI when incoming call activity put in background当来电活动置于后台时返回呼叫 UI
【发布时间】：2019-01-23 02:40:15
【问题描述】：

我正在开发一个自定义呼叫应用程序，当用户在来电期间将应用程序置于后台时，我必须在其中放置一个 UI。我正在显示通知，但我的 IncomingCallActivity 没有恢复。是否可以在来电期间在所有应用程序上放置 UI“返回通话”？

通知代码如下：

private void createNotification() { 
    // Create an explicit intent for an Activity in your app
    Intent intent = new Intent(this, IncomingCallActivity.class);
    intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
    PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, 0);

    NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this, CHANNEL_ID)
            .setSmallIcon(R.drawable.pref_noti_icon)
            .setContentTitle(this.getResources().getString(R.string.app_name))
            .setContentText(this.getResources().getString(R.string.notification_return_to_call))
            .setPriority(NotificationCompat.PRIORITY_DEFAULT)
            // Set the intent that will fire when the user taps the notification
            .setContentIntent(pendingIntent)
            .setAutoCancel(true);

    NotificationManagerCompat notificationManager = NotificationManagerCompat.from(this);


    notificationManager.notify(NOTIFICATION_ID, mBuilder.build());
}

【问题讨论】：

亲爱的@ADM 我已经编辑了我的问题，现在看来它指向了我真正的问题。请考虑撤回反对票。谢谢你
您不需要将 "return to call 放在 Window 上。只需为 Activity 提供PendingIntent ，它将打开相同的 InCallActivity onClick 通知。确保您为 InCallActivity 使用正确的启动模式。此外，您应该使用带有通知的操作来挂断电话。只需从任何 System Phone APP 中获取参考即可。

标签： android android-intent notifications call

【解决方案1】：

我已通过如下更新代码解决了问题：

@Override
public void onPause() {
    super.onPause();
    if (!isNotificationShown)
    createNotification();
}

@Override
public void onResume() {
    super.onResume();
    if (isNotificationShown) {
        clearNotification();
    }
}

@Override
public void onDestroy() {
    super.onDestroy();
        clearNotification();
}

//Create Notification
private void createNotification() {
    isNotificationShown = true;
    createNotificationChannel();
    // Create an explicit intent for an Activity in your app
    Intent intent = new Intent(IncomingCallActivity.this, IncomingCallActivity.class);
    intent.setAction(Intent.ACTION_MAIN);
    intent.addCategory(Intent.CATEGORY_LAUNCHER);
    intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, 0);

    NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this, CHANNEL_ID)
            .setSmallIcon(R.drawable.pref_noti_icon)
            .setContentTitle(this.getResources().getString(R.string.app_name))
            .setContentText(this.getResources().getString(R.string.notification_return_to_call))
            .setPriority(NotificationCompat.PRIORITY_DEFAULT)
            // Set the intent that will fire when the user taps the notification
            .setContentIntent(pendingIntent)
            .setAutoCancel(true);

    NotificationManagerCompat notificationManager = NotificationManagerCompat.from(this);
    notificationManager.notify(NOTIFICATION_ID, mBuilder.build());
}

private void clearNotification() {
    isNotificationShown = false;
    NotificationManager notificationManager = (NotificationManager) getApplicationContext().getSystemService(Context.NOTIFICATION_SERVICE);
    if (notificationManager!=null)
    notificationManager.cancel(NOTIFICATION_ID);
}

另外不要忘记在 AndroidManifest.xml 文件中设置 Activity 的android:launchMode="singleTop"。

【讨论】：