CODEWITHSUNDEEP
androidandroid-layout
aName
aName

Reputation: 3043

Passing parameter from Layout to activity

I'm learning android development from Udacity course created by google, in an exercise, it is asked to create a score record for two teams playing basketball.
the app looks like :

enter image description here.

You can guess what each button does ....
To do that they create 6 methods (addThreePointToTeamA, addTwoPointToTeamA...) for each button. but I think that two methods (addTeamA, addTeamB) are enough if I could pass an int parameter correspond to the number of points to add to each method .
So I wonder if it is possible to do that ? and if not, why ?
Thank you in advance
EDIT
here is what I wish to do : in the layout.xml :

    <Button
    ...
    android:text="+3 POINTS"
    android:onClick="addThreeTeamA(3)"
    />

then in the MainActivity.java:

public void addThreeTeamA(int point){
....
}

Upvotes: 0

Views: 501

Answers (3)

nuuneoi
nuuneoi

Reputation: 1798

It is technically possible to implement just only one Click Listener but not in the way you asked for since there is no a way to pass parameter to a click listener. Instead, you need to define android:id for every single button and use this approach.

public void buttonClicked(View v) {
  switch (v.getId()) {
    case R.id.btnAddTeamAThree:
      // Add 3 points to Team A
      break;
    case R.id.btnAddTeamATwo:
      // Add 2 points to Team A
      break;
    case R.id.btnAddTeamBThree:
      // Add 3 points to Team B
      break;
    case R.id.btnAddTeamBTwo:
      // Add 2 points to Team B
      break;
    ...
  }
}

Upvotes: 3

Nomi Malik
Nomi Malik

Reputation: 5

They created 6 methods for your better understanding. Once you get what they want to perform than you can enhance it. Yes you can enhance it by making generic methods for team-A and team-B. Its totally depend on your logic. Hope i answer your question.

Upvotes: 0

kandroidj
kandroidj

Reputation: 13922

The answer is simple you can definitely do that.

I would say, think about your design though.

Here is what I would Recommend:

// Setup an interface for common team behaviors
interface Team {
   void addPoints(int points);
   int getPoints();
}

// implement that interface per Team
class TeamA implements Team {

    private int points;

    public TeamA(){
       this.points = 0;
    }

    @Override
    public void addPoints(int points){
      this.points += points;
    }

    @Override
    public int getPoints(){
       return this.points;
    }

}

And do the same for TeamB!

then create a method in your Activity or whatever class your calling to add from:

public void addPoints(int points, Team team){
    team.addPoints(points);
}

Good Luck and Happy Coding!

Upvotes: 1

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