Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>There is a really nice trick. My problem was that some really old C++ jni library leaked resources. At some point, it stopped functioning. The user tried to exit the app and launch it again -- with no result, because finishing an activity is not the same as finishing (or killing) the process. (By the way, the user could go to the list of the running applications and stop it from there -- this would work, but the users just do not know how to terminate applications.) </p> <p>If you want to observe the effect of this feature, add a <code>static</code> variable to your activity and increment it each, say, button press. If you exit the application activity and then invoke the application again, this static variable will keep its value. (If the application really was exited, the variable would be assigned the initial value.)</p> <p>(And I have to comment on why I did not want to <em>fix</em> the bug instead. The library was written decades ago and leaked resources ever since. The management believes it always <em>worked</em>. The <em>cost</em> of providing a fix instead of a workaround... I think, you get the idea.)</p> <p>Now, how could I reset a jni shared (a.k.a. dynamic, .so) library to the initial state? I chose to restart application as a new process.</p> <p>The trick is that System.exit() closes the current activity and Android recreates the application with one activity less.</p> <p>So the code is:</p> <pre><code>/** This activity shows nothing; instead, it restarts the android process */ public class MagicAppRestart extends Activity { // Do not forget to add it to AndroidManifest.xml // &lt;activity android:name="your.package.name.MagicAppRestart"/&gt; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); System.exit(0); } public static void doRestart(Activity anyActivity) { anyActivity.startActivity(new Intent(anyActivity.getApplicationContext(), MagicAppRestart.class)); } } </code></pre> <p>The calling activity just executes the code <code>MagicAppRestart.doRestart(this);</code>, the calling activity's <code>onPause()</code> is executed, and then the process is re-created. And do not forget to mention this activity in AndroidManifest.xml</p> <p>The advantage of this method is that there is no delays.</p> <p>UPD: it worked in Android 2.x, but in Android 4 something has changed.</p>
    singulars
    1. This table or related slice is empty.
    1. POHow do I programmatically "restart" an Android app?
      singulars
      1. PTQuestion
    1. PTAnswer
    1. US18446744073709551615
    1. US18446744073709551615
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    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 used activity.startActivity(i); System.exit(0); genius solution
      singulars
      1. PO
      1. USmax4ever
    2. COThis solution closes the app for me, but it doesn't restart. At least on Android 4.3.
      singulars
      1. PO
      1. USKirill Rakhman
    3. COOn samsung galaxy mega android 4.2.2 It causes infinite loop of restart. So the app wont start again.
      singulars
      1. PO
      1. USGunhan
 

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