Rk3399 multi users on Android 7 Image

Chip Platform Rockchip
1

Have tried setup a multi user environment for the Android 7 image for the rk3399. I want to make sure there is a locked administrator user and a user that is only allowed to run a few apps.

I can add users and set restrictive rights in the settings app but I cannot activate the lock screen for any of the user to become effective nor limit the apps they access.

Also setting a different wallpaper does not seem to work.

Any advice tricks on what to install or configure for a build ?

Also the battery always indicates 50% which prohibits file system encryption to be initiated. Where can this be changed ?

2

have no experience with that:(

3

This is what I found so far:

The lock screen is apparently bypassed by default for box configurations as used by the firefly AOSP build. App limiting does work for some apps but not for the pre-installed rk apps.

Locally did the following to get the lock screen (re)enabled.

{{{
diff --git a/frameworks/base/services/core/java/com/android/server/am/ActivityRecord.java b/frameworks/base/services/core/java/com/android/server/am/ActivityRecord.java
index bbf7dc8..4c758c7 100644
— a/frameworks/base/services/core/java/com/android/server/am/ActivityRecord.java
+++ b/frameworks/base/services/core/java/com/android/server/am/ActivityRecord.java
@@ -1249,16 +1249,18 @@ final class ActivityRecord {
}

 void windowsDrawnLocked() {

+// revert to stock android to have keyguard
//Launcher is drawn completed,box can exit bootanim, other product wait for keygurad drawn

  • if(shortComponentName!=null && !shortComponentName.contains(“.FallbackHome”) && !“1”.equals(SystemProperties.get(“service.bootanim.exit”)))
  • {
  •   if(!"tablet".equals(SystemProperties.get("ro.target.product")))

  •   {

  •   	SystemProperties.set("service.bootanim.exit", "1");

  •   	SystemService.stop("bootanim");

  •   	Log.d("xzj","----not tablet,launcher drawn done,exit bootanim----");

  •   }
  • }
    +// if(shortComponentName!=null && !shortComponentName.contains(“.FallbackHome”) && !“1”.equals(SystemProperties.get(“service.bootanim.exit”)))
    +// {
    +//
    +// if(!“tablet”.equals(SystemProperties.get(“ro.target.product”)))
    +// {
    +// SystemProperties.set(“service.bootanim.exit”, “1”);
    +// SystemService.stop(“bootanim”);
    +// Log.d(“xzj”,“----not tablet,launcher drawn done,exit bootanim----”);
    +// }
    +// }
    mStackSupervisor.mActivityMetricsLogger.notifyWindowsDrawn();
    if (displayStartTime != 0) {
    reportLaunchTimeLocked(SystemClock.uptimeMillis());
    diff --git a/frameworks/base/services/core/java/com/android/server/policy/keyguard/KeyguardServiceDelegate.java b/frameworks/base/services/core/java/com/android/server/policy/keyguard/KeyguardServiceDelegate.java
    index da8c591..a5d1513 100644
    — a/frameworks/base/services/core/java/com/android/server/policy/keyguard/KeyguardServiceDelegate.java
    +++ b/frameworks/base/services/core/java/com/android/server/policy/keyguard/KeyguardServiceDelegate.java
    @@ -144,8 +144,8 @@ public class KeyguardServiceDelegate {
    resources.getString(com.android.internal.R.string.config_keyguardComponent));
    intent.addFlags(Intent.FLAG_DEBUG_TRIAGED_MISSING);
    intent.setComponent(keyguardComponent);
  •    boolean isBox = isBox();

  •    // Revert to default android as want the lock screen

  •    boolean isBox = false;//isBox();

   if (isBox || !context.bindServiceAsUser(intent, mKeyguardConnection,
           Context.BIND_AUTO_CREATE, mScrimHandler, UserHandle.SYSTEM)) {

}}}

The ro.rk.install_non_market_apps being set to true result in an restricted profile always being allowed to install apk’s

Setting a different wallpaper only seems to work through modifing the wallpaper file with adb for now.

Battery level can be adjusted using adb “adb shell dumpsys battery set level 99”

4

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5

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