Error while reading data from Realm in android

Question

I was recently introduced to Realm Database for android. It seems very easy compared to SQLite, I made a simple app to test it. The data is getting saved, but I can't retrieve it for some reason.

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Here's the MainActivity

package com.fayaz.realm;

public class MainActivity extends AppCompatActivity {


public Realm realm;
Button btn;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);
    btn=(Button)findViewById(R.id.btn);

    realm=Realm.getInstance(getApplicationContext());

    //WRITE
    FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
    fab.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            final EditText taskEditText = new EditText(MainActivity.this);
            AlertDialog dialog = new AlertDialog.Builder(MainActivity.this)
                    .setTitle("Add a new task")
                    .setMessage("What do you want to do next?")
                    .setView(taskEditText)
                    .setPositiveButton("Add", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {

                            String task = String.valueOf(taskEditText.getText());
                            realm.beginTransaction();
                            Person person=realm.createObject(Person.class);
                            person.setName(task);
                            Toast.makeText(getApplicationContext(),"ADDED",Toast.LENGTH_SHORT).show();
                            realm.commitTransaction();
                        }
                    })
                    .setNegativeButton("Cancel", null)
                    .create();
            dialog.show();
        }
    });

    //READ
    btn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            // Execute the query:
            RealmResults<Person> results = realm.where(Person.class).findAll();
            String name=results.toString();
            Toast.makeText(getApplicationContext(),name,Toast.LENGTH_SHORT).show();
        }
    });
}

@Override
protected void onDestroy(){
    super.onDestroy();
    realm.close();
    }
}

An error pops us whenever I call the function to READ Data

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java.lang.UnsatisfiedLinkError: No implementation found for long io.realm.internal.TableView.nativeSync(long) (tried Java_io_realm_internal_TableView_nativeSync and Java_io_realm_internal_TableView_nativeSync__J)

Answer 1

You should be passing a RealmConfiguration to Realm.getInstance() not getApplicationContext(). It should look something like this.

RealmConfiguration config = new RealmConfiguration.Builder(context)
  .name("myrealm.realm")
  .build();
Realm realm = Realm.getInstance(config);