json项目不会显示在列表视图中

Question

我正在尝试为我的应用添加书签，但我的代码中有一些费用，下面我将解释我的问题。

让我们从我的适配器memes.class

开始

public class memes{

    private String nome;
    private int resID;
    private Boolean mIsFavourite;

    public memes(String nome, int resID){

        this.nome = nome;
        this.resID = resID;
    }

    public Boolean getmIsFavourite() {
        return mIsFavourite;
    }

    public void setmIsFavourite(Boolean mIsFavouriteResource) {
        this.mIsFavourite = mIsFavouriteResource;
    }

    public String getNome(){
        return nome;
    }

    public int getResId(){
        return resID;
    }

    @Override
    public String toString(){
        return nome;
    }

}

主要活动

public class MainActivity extends AppCompatActivity {

    ListView lv;
    MediaPlayer mp;
    ArrayList<memes> item;
    ArrayAdapter<memes> arrayAdapter;
    String[] Nomes = new String[]{"Compartilhar", "Add Favoritos"};
    List<memes> favoriteMemes = new ArrayList<>();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(activity_main);

        lv = findViewById(R.id.lv);
        mp = new MediaPlayer();

        item = new ArrayList<>();
        //itens
        item.add(new memes("item 1", R.raw.audio1));
        item.add(new memes("item 2", R.raw.audio2));

        arrayAdapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, item);
        lv.setAdapter(arrayAdapter);

        lv.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
            @Override
            public boolean onItemLongClick(AdapterView<?> adapterView, View view, final int position, long l) {
                AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
                builder.setTitle("Menu");
                builder.setItems(MainActivity.this.Nomes, new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {
                        switch (which) {
                            case 0:
                                sendWhatsAppAudio(position);
                                return;
                            case 1:
                                //set item true
                                item.get(position).setmIsFavourite(true);
                                return;
                            default:
                        }
                    }
                });
                builder.show();
                return true;
            }
        });

    }

这是我将项目发送到其他活动的地方

//Here is the mess.
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {

            case R.id.abreFavoritos:
                for(int i=0;i<lv.getAdapter().getCount();i++){
                    memes fMeme = (memes)lv.getAdapter().getItem(i);
                    //mIsFavourite in my code it turns red
                    //what should I put after the item. to work?
                    if (item.mIsFavourite()) {
                        favoriteMemes.add(fMeme);
                    }
                }
                intent = new Intent(this, Favoritos.class);

                intent.putExtra("favoritos", new Gson().toJson(favoriteMemes));
                    startActivity(intent);

                return true;
            default:
                return super.onOptionsItemSelected(item);
        }
    }

}

现在终于我们放置Favoritos.class的活动

public class Favoritos extends AppCompatActivity {
    ListView lv;
    ArrayAdapter<memes> arrayAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(activity_main);

        lv = findViewById(R.id.lv);

        String memesString = getIntent().getStringExtra("favoritos");
        memes[] fMemes = new Gson().fromJson(memesString,memes[].class);

        arrayAdapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, fMemes);
        lv.setAdapter(arrayAdapter);
    }
}

此代码不显示项目。

我认为我的问题出在if (item.mIsFavorite ())，但我不知道该放在这里。

还有一件事，在第二项活动中我将如何删除这些项目？

和tbm我可以推荐一个来自SharedPreferences的好教程，所以我可以使用那个案例。

谢谢