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【Android源码】屏蔽系统通知出现在系统栏中

article 2024/9/21 4:17:35

环境

aosp: android-14.0.0_r1
真机：Pixel5

目标

我想把usb连接的两个系统通知屏蔽掉

“正在通过 USB 为此设备充电”
“已连接到 USB 调试”

步骤

首先找到这两句内容出现的位置在
frameworks/base/core/res/res/values-zh-rCN/strings.xml

<string name="usb_charging_notification_title" msgid="1674124518282666955">"正在通过 USB 为此设备充电"</string>

<string name="adb_active_notification_title" msgid="408390247354560331">"已连接到 USB 调试"</string>
<string name="adb_active_notification_message" msgid="5617264033476778211">"点按即可关闭 USB 调试"</string>

然后找到代码实现的位置
分别是：
frameworks/base/core/java/android/debug/AdbNotifications.java
frameworks/base/services/usb/java/com/android/server/usb/UsbDeviceManager.java

Notification.Builder builder = new Notification.Builder(mContext, channel)
                           .setSmallIcon(com.android.internal.R.drawable.stat_sys_adb)
                           .setWhen(0)
                           .setOngoing(true)
                           .setTicker(title)
                           .setDefaults(0)  // please be quiet
                           .setColor(mContext.getColor(
                                   com.android.internal.R.color
                                           .system_notification_accent_color))
                           .setContentTitle(title)
                           .setContentText(message)
                           .setContentIntent(pi)
                           .setVisibility(Notification.VISIBILITY_PUBLIC);

                   if (titleRes
                           == com.android.internal.R.string
                           .usb_unsupported_audio_accessory_title) {
                       builder.setStyle(new Notification.BigTextStyle()
                               .bigText(message));
                   }
                   Notification notification = builder.build();

                   mNotificationManager.notifyAsUser(null, id, notification,
                           UserHandle.ALL);
                   Slog.d(TAG, "push notification:" + title);
                   Log.w(TAG, "push notification:title=" + title + ";message=" + message);
                   mUsbNotificationId = id;


if (!mAdbNotificationShown) {
  Notification notification = AdbNotifications.createNotification(mContext,
                           AdbTransportType.USB);
  mAdbNotificationShown = true;
  Log.w(TAG, "updateAdbNotification:id=" + id);
  mNotificationManager.notifyAsUser(null, id, notification, UserHandle.ALL);
}

主要是mNotificationManager.notifyAsUser()这个方法，它会把内容都通知出去。所以处理它就行，如果不想要所有的系统通知，屏蔽掉它就行。但我只是不想要两个内容。
修改如下：


Notification notification = builder.build();
if(message != null && !message.equals(r.getText(com.android.internal.R.string.usb_notification_message))) {
	mNotificationManager.notifyAsUser(null, id, notification,UserHandle.ALL);
}


if (!mAdbNotificationShown) {
  Notification notification = AdbNotifications.createNotification(mContext, AdbTransportType.USB);
  mAdbNotificationShown = true;
  //mNotificationManager.notifyAsUser(null, id, notification, UserHandle.ALL);
}