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Android Intents and Broadcast Receivers For All Intents and Purposes Intentional Practice

I have key and string parameters, why the error?

I have key and string parameters, why the 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 static final String EXTRA_YEAR = "EXTRA_YEAR";
  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);

    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());
        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);



  }
}

2 Answers

Simon Coates
Simon Coates
28,694 Points

For any future users, the following seems to pass the challenge completely:

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;
  public static final String EXTRA_YEAR = "EXTRA_YEAR";

  @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);

    goButton.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View v) {
          Intent intent = new Intent(MainActivity.this,TimeTravelActivity.class);
          String year = new String();
          year = yearField.getText().toString();

          intent.putExtra(EXTRA_YEAR, year);
          startActivity(intent);
      }
    });
  }
}

and

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);    
    targetYear = getIntent().getStringExtra(MainActivity.EXTRA_YEAR );
  }
}
Seth Kroger
Seth Kroger
56,413 Points

It's one of those tricky points of Android, but EditText.getText() doesn't quite give you a String. It gives you something called an Editable and you have to use toString() on it to get a true String.

I'm trying to get use to thinking logically about this...but this was the correct answer. Correct me if I'm wrong Seth lol

..... goButton.setOnClickListener(new View.OnClickListener() {

  @Override

  public void onClick(View v) {

    // Add your code in here!

    Intent intent = new Intent(MainActivity.this,TimeTravelActivity.class);
    String year = new String();
    year = yearField.getText().toString();

    intent.putExtra(EXTRA_YEAR, year);
    startActivity(intent);

  }
});

}