Common Header in different activities using BaseActivity in android

Question

I want write code once and use in different activities. I have created a Base Activity class for that . Also the header of all the layouts in different activiti

Answer 1

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

activity_main.xml

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.