android10 隐藏SystemUI锁屏下的多用户图标的示例代码

需求:如上图,需要隐藏右上角的多用户蓝色图标.
修改后结果如下:

锁屏相关的布局在systemui

frameworks/base/packages/systemui/src/com/android/systemui/statusbar/phone/keyguardstatusbarview.java

//更新多用户图标的可见性
  private void updatevisibilities() {
    if (mmultiuserswitch.getparent() != mstatusiconarea && !mkeyguarduserswitchershowing) {
      if (mmultiuserswitch.getparent() != null) {
        getoverlay().remove(mmultiuserswitch);
      }
      mstatusiconarea.addview(mmultiuserswitch, 0);
    } else if (mmultiuserswitch.getparent() == mstatusiconarea && mkeyguarduserswitchershowing) {
      mstatusiconarea.removeview(mmultiuserswitch);
    }
    if (mkeyguarduserswitcher == null) {
      // if we have no keyguard switcher, the screen width is under 600dp. in this case,
      // we only show the multi-user switch if it's enabled through usermanager as well as
      // by the user.
      //控制其显示还是不显示
      if (mmultiuserswitch.ismultiuserenabled()) {
        mmultiuserswitch.setvisibility(view.visible);
      } else {
        mmultiuserswitch.setvisibility(view.gone);
      }
    }
    //直接使其不显示就可以生效
    mmultiuserswitch.setvisibility(view.gone);
    mbatteryview.setforceshowpercent(mbatterycharging && mshowpercentavailable);
  }

mmultiuserswitch就是显示多用户的控件,对应的代码在
frameworks/base/packages/systemui/res/layout/keyguard_status_bar.xml

 <com.android.systemui.statusbar.phone.multiuserswitch android:id="@+id/multi_user_switch"
      android:layout_width="@dimen/multi_user_switch_width_keyguard"
      android:layout_height="match_parent"
      android:background="@drawable/ripple_drawable"
      android:layout_marginend="@dimen/multi_user_switch_keyguard_margin">
      <imageview android:id="@+id/multi_user_avatar"
        android:layout_width="@dimen/multi_user_avatar_keyguard_size"
        android:layout_height="@dimen/multi_user_avatar_keyguard_size"
        android:layout_gravity="center"
        android:scaletype="centerinside"/>
    </com.android.systemui.statusbar.phone.multiuserswitch>

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