Remove Funktion in Custom ListView

GenetixX

Ich hab ein Problem mit meinem ListView. Ich brauche zwei Listen zwischen denen man beliebig Einträge Hin und Her schieben kann. Problem ist:
Ich würde gerne ein bestimmtes Layout verwenden und kann somit nicht den standart Array Adapter verwenden.

Nun brauch ich ja aber den remove bzw den add befehl und wollte somit fragen wie ich den in den Custom Adapter integriere.

Hier mein Custom ListView Code:

MainActivity.java:

Code

public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mListView = (ListView) findViewById(R.id.recipe_list_view);
        final ArrayList&lt;Recipe&gt; recipeList = Recipe.getRecipesFromFile("recipes.json", this);
        String[] listItems = new String[recipeList.size()];
        for(int i = 0; i &lt; recipeList.size(); i++){
            Recipe recipe = recipeList.get(i);
            listItems[i] = recipe.title;
        }
        ArrayAdapter adapter = new ArrayAdapter(this, android.R.layout.simple_list_item_1, listItems);
        mListView.setAdapter(adapter);
        final Context context = this;
        mListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {


            @Override
            public void onItemClick(AdapterView&lt;?&gt; parent, View view, int position, long id) {
                // 1
                Recipe selectedRecipe = recipeList.get(position);


                // 2
                Intent detailIntent = new Intent(context, RecipeDetailActivity.class);


                // 3
                detailIntent.putExtra("title", selectedRecipe.title);
                detailIntent.putExtra("url", selectedRecipe.instructionUrl);


                // 4
                startActivity(detailIntent);
            }


        });
    };
    private ListView mListView;
}

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RecipeAdapter.java:

Code

public class RecipeAdapter extends BaseAdapter {




    private static final HashMap&lt;String, Integer&gt; LABEL_COLORS = new HashMap&lt;String, Integer&gt;() {{
        put("Low-Carb", R.color.colorLowCarb);
        put("Low-Fat", R.color.colorLowFat);
        put("Low-Sodium", R.color.colorLowSodium);
        put("Medium-Carb", R.color.colorMediumCarb);
        put("Vegetarian", R.color.colorVegetarian);
        put("Balanced", R.color.colorBalanced);
    }};


private Context mContext;
private LayoutInflater mInflater;
private ArrayList&lt;Recipe&gt; mDataSource;


public RecipeAdapter(Context context, ArrayList&lt;Recipe&gt; items) {
        mContext = context;
        mDataSource = items;
        mInflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        }
    //1
    @Override
    public int getCount() {
        return mDataSource.size();
    }


    //2
    @Override
    public Object getItem(int position) {
        return mDataSource.get(position);
    }


    //3
    @Override
    public long getItemId(int position) {
        return position;
    }


    //4
    @Override
    public View getView(int position, View convertView, ViewGroup parent) {




        ViewHolder holder;


// 1
        if(convertView == null) {


            // 2
            convertView = mInflater.inflate(R.layout.list_item_recipe, parent, false);


            // 3
            holder = new ViewHolder();
            holder.thumbnailImageView = (ImageView) convertView.findViewById(R.id.recipe_list_thumbnail);
            holder.titleTextView = (TextView) convertView.findViewById(R.id.recipe_list_title);
            holder.subtitleTextView = (TextView) convertView.findViewById(R.id.recipe_list_subtitle);
            holder.detailTextView = (TextView) convertView.findViewById(R.id.recipe_list_detail);


            // 4
            convertView.setTag(holder);
        }
        else{
            // 5
            holder = (ViewHolder) convertView.getTag();
        }


// 6
        TextView titleTextView = holder.titleTextView;
        TextView subtitleTextView = holder.subtitleTextView;
        TextView detailTextView = holder.detailTextView;
        ImageView thumbnailImageView = holder.thumbnailImageView;
        Recipe recipe = (Recipe) getItem(position);


// 2
        titleTextView.setText(recipe.title);
        subtitleTextView.setText(recipe.description);
        detailTextView.setText(recipe.label);


// 3
        Picasso.with(mContext).load(recipe.imageUrl).placeholder(R.mipmap.ic_launcher).into(thumbnailImageView);


        Typeface titleTypeFace = Typeface.createFromAsset(mContext.getAssets(), "fonts/JosefinSans-Bold.ttf");
        titleTextView.setTypeface(titleTypeFace);


        Typeface subtitleTypeFace =
                Typeface.createFromAsset(mContext.getAssets(), "fonts/JosefinSans-SemiBoldItalic.ttf");
        subtitleTextView.setTypeface(subtitleTypeFace);


        Typeface detailTypeFace = Typeface.createFromAsset(mContext.getAssets(), "fonts/Quicksand-Bold.otf");
        detailTextView.setTypeface(detailTypeFace);


        detailTextView.setTextColor(ContextCompat.getColor(mContext, LABEL_COLORS.get(recipe.label)));


        return convertView;




        }


    private static class ViewHolder {
        public TextView titleTextView;
        public TextView subtitleTextView;
        public TextView detailTextView;
        public ImageView thumbnailImageView;
    }
    }

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Fischkralle

Hmm... müsste ich mir später mal angucken.

Aber erst mal eine Frage, warum programmierst du auf dem Main-Thread?

Sieht man immer öfter...

GenetixX

Weil das ganze für ein größeres Projekt gedacht ist und ich es in einem "Test Projekt"
programmiere damit ich mehr überblick habe und nicht aus versehen in Sachen eingreife
in denen ich gar nichts ändern möchte.

Remove Funktion in Custom ListView

Jetzt mitmachen!

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