Databases
StackOverflow2013
Postsdbo
POHow I get the Context with guice in provider?
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POHow I get the Context with guice in provider?
    primarykey
    data
    text
    <p>How I get the Context? Am I doing something wrong here? </p> <p>This is my Error in Android:</p> <p>FATAL EXCEPTION: main com.google.inject.CreationException: Guice creation errors: 1) Error injecting constructor, java.lang.NullPointerException </p> <pre><code>public class DatabaseProvider implements Provider { @Inject protected static Provider&lt;Context&gt; contextProvider; //eror context is null protected Context context = contextProvider.get(); @Override public DatabaseHelper get() { return (DatabaseHelper) OpenHelperManager .getHelper(context, DatabaseHelper.class); } } </code></pre> <p>Implement DaoProvider:</p> <pre><code>public class DaoProvider&lt;D extends Dao&lt;E, ?&gt;, E&gt; implements Provider&lt;D&gt; { @Inject private DatabaseProvider databaseProvider; private final Class&lt;E&gt; cls; public DaoProvider(Class&lt;E&gt; cls) { this.cls = cls; } @Override public D get() { try { return databaseProvider.get().getDao(cls); } catch (SQLException e) { Log.d("injection", "database provider error", e); } return null; } </code></pre> <p>}</p> <p>Implement in module:</p> <pre><code>public class BabyModule extends AbstractModule { @Override protected void configure() { TypeLiteral&lt;Dao&lt;Baby, Integer&gt;&gt; typeLiteral = new TypeLiteral&lt;Dao&lt;Baby, Integer&gt;&gt;(){}; DaoProvider&lt;Dao&lt;Baby,Integer&gt;, Baby&gt; provider = new DaoProvider&lt;Dao&lt;Baby,Integer&gt;, Baby&gt;(Baby.class); bind(typeLiteral).toProvider(provider); } </code></pre> <p>}</p> <p>Thanks for help</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USuser949884
    1. USuser949884
    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. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    3. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POHow I get the Context with guice in provider?
      1. This table or related slice is empty.
      1. VTUpMod
    1. COAny `@Inject` do not happen until _after_ the constructor was run.
      singulars
      1. POHow I get the Context with guice in provider?
      1. USThorbjørn Ravn Andersen
    2. COWhat do you mean constructor?
      singulars
      1. POHow I get the Context with guice in provider?
      1. USuser949884
    3. COThe object cannot be analysed for what to inject until _after_ it has been fully created. Hence the `contextProvider.get()` is being run before the contextProvder is set by Guice.
      singulars
      1. POHow I get the Context with guice in provider?
      1. USThorbjørn Ravn Andersen
 

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