Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

Android Intents and Broadcast Receivers For All Intents and Purposes Parcel All the Things!

Abdulla Alshubbar
Abdulla Alshubbar
31,298 Points

Intents and Broadcast Receivers Challenge Task Error

The questions says: Now we need to retrieve the new extra in TimeTravelActivity. Add an EnergySource variable and set it to the extra from the Intent. The error I'm getting is this:

./TimeTravelActivity.java:15: error: incompatible types: Parcelable cannot be converted to EnergySource
    EnergySource source = intent.getParcelableExtra("EXTRA_ENERGY");
                                                   ^
1 error

The previous question clearly says that the EnergySource implements the Parcelable interface. If that was true, then why I'm getting this error?

MainActivity.java
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

public class MainActivity extends Activity {

  public Button goButton;
  public EditText yearField;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    goButton = (Button)findViewById(R.id.goButton);
    yearField = (EditText)findViewById(R.id.yearField);

    final EnergySource source = new EnergySource();

    goButton.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View v) {
        // Add your code in here!
        Intent intent = new Intent(MainActivity.this, TimeTravelActivity.class);
        intent.putExtra("EXTRA_YEAR", yearField.getText().toString());
        intent.putExtra("EXTRA_ENERGY", source);
        startActivity(intent);
      }
    });
  }
}
TimeTravelActivity.java
import android.os.Bundle;
import android.view.View;

public class TimeTravelActivity extends Activity {

  public String targetYear;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_time_travel);

    Intent intent = getIntent();
    targetYear = intent.getStringExtra("EXTRA_YEAR");
    EnergySource source = intent.getParcelableExtra("EXTRA_ENERGY");
  }
}

dont forget to type cast EnergySource source=(EnergySource)intent.getParcelableExtra("EXTRA_ENERGY");