notification的通知代码

public Notification createNotification() {
  String channelId = createNotificationChannel("my_channel_ID", "my_channel_NAME", NotificationManager.IMPORTANCE_HIGH);
  RemoteViews notificationLayout = buildStyleOneRemoteViews();
  RemoteViews notificationLayoutExpanded = buildStyleOneRemoteViews1();
  notification = new NotificationCompat.Builder(this, channelId)
      .setSmallIcon(R.mipmap.ic_launcher)
      .setCustomBigContentView(notificationLayoutExpanded)
      .setWhen(cureentTime)
      .setShowWhen(true)
      .setOngoing(true)
      .setSound(null)
      .setVibrate(null)
      .setStyle(null)
      .setPriority(Notification.PRIORITY_HIGH)
      .setVisibility(NotificationCompat.VISIBILITY_PUBLIC)
      .setSmallIcon(R.drawable.notification_layout_icon)
      .setGroup("group_growth_notification")
      .setGroupSummary(false)
      .setCustomContentView(notificationLayout)
      .setCustomBigContentView(notificationLayoutExpanded)
      .setVisibility(NotificationCompat.VISIBILITY_SECRET);
  notificationManager = NotificationManagerCompat.from(this);
  notificationManager.notify(mNitificationCount, notification.build());
  return null;
}

private String createNotificationChannel(String channelID, String channelNAME, int level) {
  if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
    NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
    NotificationChannel channel = new NotificationChannel(channelID, channelNAME, level);
    manager.createNotificationChannel(channel);
    return channelID;
  } else {
    return null;
  }
}

private RemoteViews buildStyleOneRemoteViews() {
  RemoteViews view = new RemoteViews(getPackageName(), R.layout
      .activity_main1);

  int textColor = getNotificationColor(this);
  if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.M) {
     textColor = getNotificationColor(this);
    view.setTextColor(R.id.notification_title, textColor);
    view.setTextColor(R.id.notification_name, textColor);
    view.setTextColor(R.id.notfication_kwai_name, textColor);
  }

private static final String NOTIFICATION_TITLE = "notification_title";
public  final int INVALID_COLOR = -1; // 无效颜色
private  int notificationTitleColor = INVALID_COLOR; // 获取到的颜色缓存
/**
 * 获取系统通知栏主标题颜色，根据Activity继承自AppCompatActivity或FragmentActivity采取不同策略。
 *
 * @param context 上下文环境
 * @return 系统主标题颜色
 */
public  int getNotificationColor(Context context) {
  try {
    if (notificationTitleColor == INVALID_COLOR) {
      if (context instanceof AppCompatActivity) {
        notificationTitleColor = getNotificationColorCompat(context);
      } else {
        notificationTitleColor = getNotificationColorInternal(context);
      }
    }
  } catch (Exception ignored) {
  }
  return notificationTitleColor;
}
/**
 * 通过一个空的Notification拿到Notification.contentView，通过{@link RemoteViews#apply(Context, ViewGroup)}方法返回通知栏消息根布局实例。
 *
 * @param context 上下文
 * @return 系统主标题颜色
 */
private  int getNotificationColorInternal(Context context) {
  Notification.Builder builder = new Notification.Builder(context);
  builder.setContentTitle(NOTIFICATION_TITLE);
  Notification notification = builder.build();
  try {
    ViewGroup root = (ViewGroup) notification.contentView.apply(context, new FrameLayout(context));
    TextView titleView = (TextView) root.findViewById(android.R.id.title);
    if (null == titleView) {
      iteratorView(root, new Filter() {
        @Override
        public void filter(View view) {
          if (view instanceof TextView) {
            TextView textView = (TextView) view;
            if (NOTIFICATION_TITLE.equals(textView.getText().toString())) {
              notificationTitleColor = textView.getCurrentTextColor();
            }
          }
        }
      });
      return notificationTitleColor;
    } else {
      return titleView.getCurrentTextColor();
    }
  } catch (Exception e) {
    return getNotificationColorCompat(context);
  }
}
/**
 * 使用getNotificationColorInternal()方法，Activity不能继承自AppCompatActivity（实测5.0以下机型可以，5.0及以上机型不行），
 * 大致的原因是默认通知布局文件中的ImageView（largeIcon和smallIcon）被替换成了AppCompatImageView，
 * 而在5.0及以上系统中，AppCompatImageView的setBackgroundResource(int)未被标记为RemotableViewMethod，导致apply时抛异常。
 *
 * @param context 上下文
 * @return 系统主标题颜色
 */
private  int getNotificationColorCompat(Context context) {
  try {
    Notification.Builder builder = new Notification.Builder(context);
    Notification notification = builder.build();
    int layoutId = notification.contentView.getLayoutId();
    ViewGroup root = (ViewGroup) LayoutInflater.from(context).inflate(layoutId, null);
    TextView titleView = (TextView) root.findViewById(android.R.id.title);
    if (null == titleView) {
      return getTitleColorIteratorCompat(root);
    } else {
      return titleView.getCurrentTextColor();
    }
  } catch (Exception e) {
  }
  return INVALID_COLOR;
}
private  void iteratorView(View view, Filter filter) {
  if (view == null || filter == null) {
    return;
  }
  filter.filter(view);
  if (view instanceof ViewGroup) {
    ViewGroup viewGroup = (ViewGroup) view;
    for (int i = 0; i < viewGroup.getChildCount(); i++) {
      View child = viewGroup.getChildAt(i);
      iteratorView(child, filter);
    }
  }
}
private  int getTitleColorIteratorCompat(View view) {
  if (view == null) {
    return INVALID_COLOR;
  }
  List<TextView> textViews = getAllTextViews(view);
  int maxTextSizeIndex = findMaxTextSizeIndex(textViews);
  if (maxTextSizeIndex != Integer.MIN_VALUE) {
    return textViews.get(maxTextSizeIndex).getCurrentTextColor();
  }
  return INVALID_COLOR;
}
private  int findMaxTextSizeIndex(List<TextView> textViews) {
  float max = Integer.MIN_VALUE;
  int maxIndex = Integer.MIN_VALUE;
  int index = 0;
  for (TextView textView : textViews) {
    if (max < textView.getTextSize()) {
      // 找到字号最大的字体，默认把它设置为主标题字号大小
      max = textView.getTextSize();
      maxIndex = index;
    }
    index++;
  }
  return maxIndex;
}
/**
 * 实现遍历View树中的TextView，返回包含TextView的集合。
 *
 * @param root 根节点
 * @return 包含TextView的集合
 */
private  List<TextView> getAllTextViews(View root) {
  final List<TextView> textViews = new ArrayList<>();
  iteratorView(root, new Filter() {
    @Override
    public void filter(View view) {
      if (view instanceof TextView) {
        textViews.add((TextView) view);
      }
    }
  });
  return textViews;
}
private interface Filter {
  void filter(View view);
}