How to call onclick on another activity?

Question

I just started development in android and got stuck with this idea

I have created two activity one is the HomeActivity and other one is LoginActivity. I want to put minimal code in the HomeActivity and all other operations i want to put in another activity.

My use-case is i have put an onclick event on HomeActivity and the onclick method implementation i have written in LoginActivity. But i am unable to call the LoginActivity onclick method implementation. Also, both HomeActivity and LoginActivity are having the same layout (activity_main.xml)

The files are as follows:

HomeActivity.java

public class HomeActivity extends Activity {

  private static String TAG = HomeActivity.class.getSimpleName();
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_home);
   }
}

LoginActivity.java

 public class LoginActivity extends Activity {
   private static String TAG = LoginActivity.class.getSimpleName();

   @Override
   protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_home);
   }

  public void onLogin(View view){
     // some actions
   TextView loginText = (TextView)findViewById(R.id.login);
  }

  }

activity_home.xml

  <TextView
    android:id="@+id/login"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"  
  />
  <Button
     android:id="@+id/login_bt"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:onClick = "onLogin"
   />

Both HomeActivity and LoginActivity are using the same layout activity_home. Is it correct and possible to do this in android. and secondly if it's possible how to invoke onLogin on LoginActivity so that i can set the text to the TextView.

score 2 · Accepted Answer · answered Aug 28 '14 at 13:52

Create a custom class CustomActivity that extends Activity

private class CustomActivity extends Activity
{
    public void onLogin(View view)
    {
        TextView loginText = (TextView) findViewById(R.id.login);
    }
}

and then extend LoginActivity and HomeActivity with CustomActivity. This way onLogin method will be available to both LoginActivity and HomeActivity and if you need to change what you do in onLogin you can override it in any of the child classes.

If you are using the above method as-is make sure that the layout of both LoginActivity and HomeActivity have a TextView with id login

How to call onclick on another activity?

1 Answers1