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

Robin Damsgaard Larsen
Robin Damsgaard Larsen
13,929 Points
Posted by Robin Damsgaard Larsen
Robin Damsgaard Larsen
13,929 Points

Possible error in the coding challenge (Parcel all the things!)

The compiler says I have en error at the intent.getParcelableExtra("...") in TimeTravelActivity. I've copied this code directly from IntelliJ where it compiles just fine, which leads me to believe that there's an error in the challenge. Anyone?

EDIT: As the best answer below states, all that is needed is to cast the parcelable from the intent as an EnergySource; the challenge is not broken. I guess I was a bit hasty in blaming the tech instead of myself :)

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;
  public EnergySource source;

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

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

1 Answer

Ben Deitch
STAFF
Ben Deitch
Treehouse Teacher
Ben Deitch
Ben Deitch
Treehouse Teacher

Hey Robin!

It just wants you to cast your parcelable extra to an EnergySource :)

source = (EnergySource) intent.getParcelableExtra("EXTRA_ENERGY");