Common Clickable Header for All Activities in Android

Question

I have an application with a common Header in all layouts. I want that whenever the user clicks at the the ImageView with id btn_home, the app will go back to a

Answer 1

You can make a custom component out of your header and define 'onClick()' in it. For example, make a new class Header that would extend a RelativeLayout and inflate your header.xml there. Then, instead of tag you would use . No code duplication and the header becomes totally reusable.

UPD: Here's some code examples

header.xml:

activity_with_header.xml:

Header.java:

public class Header extends RelativeLayout {
public static final String TAG = Header.class.getSimpleName();

protected ImageView logo;
private TextView label;
private Button loginButton;

public Header(Context context) {
    super(context);
}

public Header(Context context, AttributeSet attrs) {
    super(context, attrs);
}

public Header(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
}

public void initHeader() {
        inflateHeader();
}

private void inflateHeader() {
    LayoutInflater inflater = (LayoutInflater) getContext()
            .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    inflater.inflate(R.layout.header, this);
    logo = (ImageView) findViewById(R.id.logo);
    label = (TextView) findViewById(R.id.label);
    loginButton = (Button) findViewById(R.id.login);
}

ActivityWithHeader.java:

public class ActivityWithHeader extends Activity {
private View mCreate;

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    requestWindowFeature(Window.FEATURE_NO_TITLE);
    setContentView(R.layout.activity_with_header);

    Header header = (Header) findViewById(R.id.header);
    header.initHeader();
    // and so on
}
}

In this example, Header.initHeader() can be moved inside Header's constructor, but generally this method provides a nice way to pass on some useful listeners. Hope this will help.