Question

I have two layouts: main.xml and journal.xml
When I click on a button in the main.xml layout, the journal.xml layout will be opened.

The problem is that i would like to create a back button which will re-open the main.xml layout.
When I try to do:

ImageButton buttonHome = (ImageButton)findViewById(R.id.image);

The image is not found because she is not in my main.xml

Could you please help me.

Thanks

Here is the code:

public class MDPI_1Activity extends Activity 
{
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.journal);
        ImageButton buttonJournal = (ImageButton)findViewById(R.id.imageButton1); //Journal
        ImageButton buttonHome = (ImageButton)findViewById(R.id.image); //Journal


        buttonJournal.setOnClickListener(new Button.OnClickListener() 
        {

            public void onClick(View v) 
            {

                setContentView(R.layout.journal);
            }
        });


        buttonHome.setOnClickListener(new Button.OnClickListener() 
        {

            public void onClick(View v) 
            {

                setContentView(R.layout.main);
            }
        });

    }

}

The “imageButton1” is in my main.xml file and works good but the “image” is in my second xml file named “journal” and does not exist in the R file.

Answer 1

EDIT: I don’t know if this will work.. but you can set the onClick parameter on your layout (XML) like this:

//Activity
public class MDPI_1Activity extends Activity 
{
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.journal);

    }


    public void goJournal(View v)
    {

        setContentView(R.layout.journal);
    }


    public void goHome(View v)
    {

        setContentView(R.layout.main);
    }

}

//BUTTON IN HOME LAYOUT
<Button
    android:id="@+id/button1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Journal"
    android:onClick="goJournal" />

//BUTTON IN JOURNAL LAYOUT
<Button
    android:id="@+id/button1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Home"
    android:onClick="goHome" />