For this you have to create one header.xml which will be included in each and every layout for your activities as follows
header.xml
<RelativeLayout>
<TextView android:id="@+id/txtHeading"
.... />
</RelativeLayout>
activity_main.xml
<RelativeLayout>
<!-- include your header here -->
<include layout="@layout/header"
... />
<!-- Rest of your views -->
</RelativeLayout>
BaseActivity
abstract class BaseActivity extends Activity {
protected TextView txtHeading;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
protected void setHeading(int resId) {
if(txtHeading == null)
txtHeading = findViewById(R.id.txtHeading);
if(txtHeading != null)
txtHeading.setText(resId);
}
}
MainActivity
class MainActivity extends BaseActivity {
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setHeading(R.string.heading_main);
}
}
You can put as many views you want and manage common things in BaseActivity or BaseListActivity.