关于android:关于Android-10以上无法隐藏应用图标问题探究及解决方案

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Android 10 之前的暗藏形式：

con.getPackageManager().setComponentEnabledSetting(new ComponentName(con,activityAliasName,PackageManager.COMPONENT_ENABLED_STATE_DISABLED,PackageManager.DONT_KILL_APP);

Android 10 之后，该暗藏图标形式生效，暗藏胜利后仍然会在桌面上保留其图标，点击后会跳转到利用详情页。具体查看官网 API 更新阐明：getActivityList)。

那这就很好受了，在我看来，目前设计的并不太正当，能不能暗藏应该由用户决定，而不是强制不容许暗藏，不过目前官网也设置了管制开关，能够批改零碎设置来去掉该限度，只不过须要 adb 或能批改零碎设置的 APP 或 ROOT 权限能力批改。接下来就是具体分析了。

getActivityList

//frameworks/base/core/java/android/content/pm/LauncherApps.java
  public List<LauncherActivityInfo> getActivityList(String packageName, UserHandle user) {logErrorForInvalidProfileAccess(user);
      try {return convertToActivityList(mService.getLauncherActivities(mContext.getPackageName(),
                  packageName, user), user);
      } catch (RemoteException re) {throw re.rethrowFromSystemServer();
      }
  }

getLauncherActivities

//frameworks/base/services/core/java/com/android/server/pm/LauncherAppsService.java
@Override
public ParceledListSlice<LauncherActivityInfoInternal> getLauncherActivities(String callingPackage, String packageName, UserHandle user) throws RemoteException {
  // 查问蕴含 ACTION_MAIN 和 CATEGORY_LAUNCHER 的 activity
  ParceledListSlice<LauncherActivityInfoInternal> launcherActivities =
          queryActivitiesForUser(callingPackage,
                  new Intent(Intent.ACTION_MAIN)
                          .addCategory(Intent.CATEGORY_LAUNCHER)
                          .setPackage(packageName),
                  user);
  // 检测零碎设置（零碎设置管制开关管制是否走新版限度逻辑）if (Settings.Global.getInt(mContext.getContentResolver(),
          Settings.Global.SHOW_HIDDEN_LAUNCHER_ICON_APPS_ENABLED, 1) == 0) {return launcherActivities;}
  // 没有找到入口 activity
  if (launcherActivities == null) {
      // Cannot access profile, so we don't even return any hidden apps.
      return null;
  }

  final int callingUid = injectBinderCallingUid();
  final long ident = injectClearCallingIdentity();
  try {
      // 托管配置文件能够暗藏 APP
      if (mUm.getUserInfo(user.getIdentifier()).isManagedProfile()) {
          // Managed profile should not show hidden apps
          return launcherActivities;
      }
      // 设施管理员能够暗藏 APP
      if (mDpm.getDeviceOwnerComponentOnAnyUser() != null) {
          // Device owner devices should not show hidden apps
          return launcherActivities;
      }

      final ArrayList<LauncherActivityInfoInternal> result = new ArrayList<>(launcherActivities.getList());
      if (packageName != null) {
          // If this hidden app should not be shown, return the original list.
          // Otherwise, inject hidden activity that forwards user to app details page.
          // 可能是如果大于 0，示意有无效的启动入口，则不必注入暗藏的 APP 详情页入口
          if (result.size() > 0) {return launcherActivities;}
          final ApplicationInfo appInfo = mPackageManagerInternal.getApplicationInfo(packageName, /* flags= */ 0, callingUid, user.getIdentifier());
          // 依据 APP 信息进行判断是否注入暗藏 APP 详情页入口
          if (shouldShowSyntheticActivity(user, appInfo)) {
              LauncherActivityInfoInternal info = getHiddenAppActivityInfo(packageName,
                      callingUid, user);
              if (info != null) {result.add(info);
              }
          }
          return new ParceledListSlice<>(result);
      }
      final HashSet<String> visiblePackages = new HashSet<>();
      for (LauncherActivityInfoInternal info : result) {visiblePackages.add(info.getActivityInfo().packageName);
      }
      final List<ApplicationInfo> installedPackages =
              mPackageManagerInternal.getInstalledApplications(/* flags= */ 0,
                      user.getIdentifier(), callingUid);
      for (ApplicationInfo applicationInfo : installedPackages) {if (!visiblePackages.contains(applicationInfo.packageName)) {if (!shouldShowSyntheticActivity(user, applicationInfo)) {continue;}
              LauncherActivityInfoInternal info = getHiddenAppActivityInfo(applicationInfo.packageName, callingUid, user);
              if (info != null) {result.add(info);
              }
          }
      }
      return new ParceledListSlice<>(result);
  } finally {injectRestoreCallingIdentity(ident);
  }
}

shouldShowSyntheticActivity

//frameworks/base/services/core/java/com/android/server/pm/LauncherAppsService.java
private boolean shouldShowSyntheticActivity(UserHandle user, ApplicationInfo appInfo) {
  // 没有 app 信息，是零碎 APP 或者更新的零碎 APP，则不增加暗藏详情页入口
  if (appInfo == null || appInfo.isSystemApp() || appInfo.isUpdatedSystemApp()) {return false;}
  // 是管理员 APP 也不必增加该入口
  if (isManagedProfileAdmin(user, appInfo.packageName)) {return false;}
  final AndroidPackage pkg = mPackageManagerInternal.getPackage(appInfo.packageName);
  if (pkg == null) {
      // Should not happen, but we shouldn't be failing if it does
      return false;
  }
  // If app does not have any default enabled launcher activity or any permissions,
  // the app can legitimately have no icon so we do not show the synthetic activity.
  return requestsPermissions(pkg) && hasDefaultEnableLauncherActivity(appInfo.packageName);
}

依据以上源码，能够发现该机制有个全局设置开关，并且有多种状况能够不受该机制限度。因而总结出如下解决方案：

若是你的 APP 有 adb 权限或 ROOT 权限，能够间接批改这个全局开关，批改命令如下：
```
adb shell settings put global show_hidden_icon_apps_enabled 0
```
或者你的 APP 有设施管理员权限
或者你的 APP 是零碎 APP
或者你的 APP 没有任何默认启动入口
或者你的 APP 没有申请任何权限
或者你的 APP 波及到 Managed profile（这个具体不太分明怎么用）
或者你的 APP 是 Xposed 模块，能够间接注入零碎服务拦挡相干 API，或者注入能够批改零碎设置的 APP（比方：设置）间接批改这个开关
或者你是零碎源码开发者，能够间接批改该处代码即可
其它更多还未摸索出的形式 (比方利用某些逻辑破绽)……..