Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p><em>Edited to elaborate on the solution</em></p> <p><strong>Overview</strong></p> <p>My simple solution was to add a new service and activity to my application. The service uses <a href="http://developer.android.com/reference/android/os/Handler.html" rel="noreferrer"><code>Handler</code></a> and <a href="http://developer.android.com/reference/android/os/Handler.html#postDelayed%28java.lang.Runnable,%20long%29" rel="noreferrer"><code>postDelayed</code></a> to continuously schedule the monitoring task. The monitoring task checks that the current activity is on the whitelist. Getting the currently running activity involves <a href="http://developer.android.com/reference/android/app/ActivityManager.html" rel="noreferrer"><code>ActivityManager</code></a> and a call to <a href="http://developer.android.com/reference/android/app/ActivityManager.html#getRunningTasks%28int%29" rel="noreferrer"><code>getRunningTasks</code></a>. After finishing the check, the monitoring task schedules itself to run again after X seconds (1, in my case).</p> <p>If the activity on top is not on the whitelist, we launch the blocking activity which pops up over whatever is currently running. The key part of the blocking activity is that it overrides <a href="http://developer.android.com/reference/android/app/Activity.html#onBackPressed%28%29" rel="noreferrer"><code>onBackPressed</code></a>, preventing the user from simply going back to the "bad" activity. Pressing the Home key is the only way (to my knowledge) to leave this screen.</p> <p><strong>Tips</strong></p> <ul> <li>Build a backdoor into the lock screen. For example, my solution prompts for a password on a long-press of the back key. After entering the correct password, the monitor service goes to sleep for 5 minutes so I can do my administrative work</li> <li>Display the name of the blocked activity</li> <li>Gather a good whitelist before turning this on! Activities you should definitely whitelist: the launcher, package installer, your own app (obviously), the browser, if your app has a web-based component</li> </ul> <p>I don't like that my service is constantly looping in the background; it seems wasteful. I'd like to find some way to be notified when a new task is being launched, but I couldn't find a way to do that. The battery usage for my particular value of the monitor period and my particular phone is acceptable; though you should definitely test before adopting this yourself.</p>
    singulars
    1. This table or related slice is empty.
    1. POAutomatically prevent apps starting from the launcher
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USWorkerThread
    1. USWorkerThread
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POAutomatically prevent apps starting from the launcher
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTAcceptedByOriginator
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. COI'm interested in this approach. Would you mind posting code? Did you experience any problems with this technique?
      singulars
      1. PO
      1. This table or related slice is empty.
    2. CO@WorkerThread Very interesting! I'm really looking into it for our customers after we got $400 data bills this month :) Did you come up with better solution? Maybe some kind of system service to intercept launcher events?
      singulars
      1. PO
      1. USkatit
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload