Question

I currently have an Android ListView class that displays a list of about 20 topics (Strings). I need to be able to click each button on the list and have that button open up a view specific to that topic.

For example, if this was a recipe list, then the layout for all of the recipe views could be the same, but when the user clicks a specific recipe from the list, then the program must load that recipe into the common layout and bring the user to that view.

I have the OnItemClickListener working I think, but I’m not sure how to implement the rest.

Will I need a new activity and layout for each recipe? Is there an easier way to implement this without making dozens of identical layout and activity files?

Also, how will I populate the view with the recipe?

Thanks much appreciated for any helpful thoughts!

— Some relevant code: The Listview Activity Code

listAdapter = new ArrayAdapter<String>(this, R.layout.simplerow, studiesList);  

    // Set the ArrayAdapter as the ListView's adapter.  
    mainListView.setAdapter( listAdapter );    
    mainListView.setClickable(true);
    mainListView.setOnItemClickListener(new OnItemClickListener(){

        public void onItemClick(AdapterView<?> a, View view, int position, long id) { 

            switch( position )
            {
               case 0:  Intent intent = new Intent(StudyActivity.this, pos.class); 
                        startActivity(intent);
                        break;

The SimpleRow.xml File: (The buttons for the list)

<?xml version="1.0" encoding="utf-8"?>
<Button xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
</Button>

Answer 1

What you need to do is make a serializable recipe class with some attributes, and then make new objects of that class for each of the 20 recipes.

I assume you’d have something like

public class Recipe extends Serializable{ 
private String name; 
private String ingredients; 

public Recipe(String name, String ingredients){
this.name = name;
this.ingredients = ingredients;
}

}

Then make an array list of these objects

ArrayList<Recipe> recipes = new ArrayList<Recipe>();
recipes.add(new Recipe("Chicken Curry", "Random cooking instructions"));

and use that arraylist in your list adapter.

Then in your onItemClickListener you’l need something like

Intent i = new Intent(this, recipeDisplay.class)
i.putExtra("recipe",  listAdapter.getItemAtPosition(position)); 

and in your recipe display class just recieve the intent and use the object to populate your activity fields.

Intent intent = getIntent():
intent.getSerializableExtra("recipe");