棒棒糖通知setVisibility()不起作用？

Question

我正在尝试编写一个使用的演示setVisibility()来控制Android 5.0锁屏上显示的内容Notification.但是,似乎没有效果:

• 默认设置VISIBILITY_PRIVATE仍然显示私有Notification,而不是公共对应

• VISIBILITY_SECRET 通知仍会显示在锁定屏幕上

IOW,一切都表现得好像VISIBILITY_PUBLIC有效,至少当我测试运行Android 5.0图像的Nexus 7时,我们在Android 5.0发布后不久就给出了(构建LPX13D).所以我不知道问题是否与我的代码,此设备或Android中的错误有关.

我有两个版本的相同示例应用程序:

• 一个使用NotificationCompat和NotificationManagerCompat

• 其他的用途Notification和NotificationManager使用minSdkVersion的21和targetSdkVersion21

(请注意,这些项目主要用于Android Studio; Eclipse用户可以导入项目,但可能需要进行少量修复,特别是对于support-v13第一个示例的库引用)

样本用于AlarmManager触发Notification工作,主要是因为您有机会返回锁定屏幕以查看结果.这是BroadcastReceiver由AlarmManager(显示NotificationCompat版本)触发的:

/***
 Copyright (c) 2014 CommonsWare, LLC
 Licensed under the Apache License, Version 2.0 (the "License"); you may not
 use this file except in compliance with the License. You may obtain a copy
 of the License at http://www.apache.org/licenses/LICENSE-2.0. Unless required
 by applicable law or agreed to in writing, software distributed under the
 License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS
 OF ANY KIND, either express or implied. See the License for the specific
 language governing permissions and limitations under the License.

 From _The Busy Coder's Guide to Android Development_
 http://commonsware.com/Android
 */

package com.commonsware.android.lollipopnotify;

import android.app.Notification;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.provider.Settings;
import android.support.v4.app.NotificationCompat;
import android.support.v4.app.NotificationManagerCompat;

public class AlarmReceiver extends BroadcastReceiver {
  private static final int NOTIFY_ID=1337;
  static final String EXTRA_TYPE="type";

  @Override
  public void onReceive(Context ctxt, Intent i) {
    NotificationManagerCompat mgr=NotificationManagerCompat.from(ctxt);

    switch (i.getIntExtra(EXTRA_TYPE, -1)) {
      case 0:
        notifyPrivate(ctxt, mgr);
        break;

      case 1:
        notifyPublic(ctxt, mgr);
        break;

      case 2:
        notifySecret(ctxt, mgr);
        break;

      case 3:
        notifyHeadsUp(ctxt, mgr);
        break;
    }
  }

  private void notifyPrivate(Context ctxt, NotificationManagerCompat mgr) {
    Notification pub=buildPublic(ctxt).build();

    mgr.notify(NOTIFY_ID, buildNormal(ctxt).setPublicVersion(pub).build());
  }

  private void notifyPublic(Context ctxt, NotificationManagerCompat mgr) {
    mgr.notify(NOTIFY_ID,
        buildNormal(ctxt)
            .setVisibility(NotificationCompat.VISIBILITY_PUBLIC)
            .build());
  }

  private void notifySecret(Context ctxt, NotificationManagerCompat mgr) {
    mgr.notify(NOTIFY_ID,
        buildNormal(ctxt)
            .setVisibility(NotificationCompat.VISIBILITY_SECRET)
            .build());
  }

  private void notifyHeadsUp(Context ctxt, NotificationManagerCompat mgr) {
    mgr.notify(NOTIFY_ID,
        buildNormal(ctxt)
            .setPriority(NotificationCompat.PRIORITY_HIGH)
            .build());
  }

  private NotificationCompat.Builder buildNormal(Context ctxt) {
    NotificationCompat.Builder b=new NotificationCompat.Builder(ctxt);

    b.setAutoCancel(true)
        .setDefaults(Notification.DEFAULT_ALL)
        .setContentTitle(ctxt.getString(R.string.download_complete))
        .setContentText(ctxt.getString(R.string.fun))
        .setContentIntent(buildPendingIntent(ctxt, Settings.ACTION_SECURITY_SETTINGS))
        .setSmallIcon(android.R.drawable.stat_sys_download_done)
        .setTicker(ctxt.getString(R.string.download_complete))
        .addAction(android.R.drawable.ic_media_play,
            ctxt.getString(R.string.play),
            buildPendingIntent(ctxt, Settings.ACTION_SETTINGS));

    return(b);
  }

  private NotificationCompat.Builder buildPublic(Context ctxt) {
    NotificationCompat.Builder b=new NotificationCompat.Builder(ctxt);

    b.setAutoCancel(true)
        .setDefaults(Notification.DEFAULT_ALL)
        .setContentTitle(ctxt.getString(R.string.public_title))
        .setContentText(ctxt.getString(R.string.public_text))
        .setContentIntent(buildPendingIntent(ctxt, Settings.ACTION_SECURITY_SETTINGS))
        .setSmallIcon(android.R.drawable.stat_sys_download_done)
        .addAction(android.R.drawable.ic_media_play,
            ctxt.getString(R.string.play),
            buildPendingIntent(ctxt, Settings.ACTION_SETTINGS));

    return(b);
  }

  private PendingIntent buildPendingIntent(Context ctxt, String action) {
    Intent i=new Intent(action);

    return(PendingIntent.getActivity(ctxt, 0, i, 0));
  }
}

在EXTRA_TYPE正在从一个设置Spinner在活动.这个逻辑似乎没问题,因为单挑Notification场景运作得很好.如果我通过代码(例如,断点步骤onReceive()),我看到它通过合适的路径(例如,要求setVisibility(NotificationCompat.VISIBILITY_SECRET)在notifySecret()当我选择提高一个秘密Notification).

因此,我有点不知道为什么我没有在Android 5.0锁屏上获得可见性效果.

有什么建议？

Answer 1

您描述的行为与我将锁屏通知首选项设置为"显示所有通知内容"时遇到的行为一致.

此设置有三个选项:

• 显示所有通知内容会使所有通知(无论可见性)有效公开.

• 隐藏敏感通知内容会尊重新的可见性类型.

• 根本不显示通知会使所有通知都有效保密.

更改锁屏通知可见性的选项位于声音和通知>"设备锁定时"下的设备设置中,如下所示.

正如Selvin在回答中指出的那样,隐藏敏感内容的选项仅在您设置了某种设备锁定(例如PIN或模式锁定)时才可用.如果您只需轻扫一下锁屏即可解锁设备,则此选项不可用.