Question

我想搜索演员，但我收到了这个错误。我之前做过但是，现在我正在尝试不同的适配器。它可能是如此基本，但我无法解决它。请帮忙。感谢。

public class Actors extends AppCompatActivity {

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

        ArrayList<Actor> actors = new ArrayList<Actor>();

        actors.add(new Actor("jacknicholson",1,R.drawable.jacknicholson));
        actors.add(new Actor("Marlon Brando",2,R.drawable.marlonbrando));
        actors.add(new Actor("Robert De Niro",3,R.drawable.robertdeniro));
        actors.add(new Actor("Al Pacino",4,R.drawable.alpacino));
        actors.add(new Actor("Danel Day-Lewis",5,R.drawable.danielday));
        actors.add(new Actor("Dustin Hoffman",6,R.drawable.dustinhoffman));


        final MovieAdapter itemsAdapter = new MovieAdapter(this, actors);
        ListView listView = (ListView) findViewById(R.id.list);
        listView.setAdapter(itemsAdapter);


        EditText theFilter =(EditText) findViewById(R.id.editt);

        theFilter.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
            }

            @Override
            public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
                 //Here I'm getting an error
                (Actors.this).itemsAdapter.getFilter().filter(charSequence);
            }

            @Override
            public void afterTextChanged(Editable editable) {

            }
        });

    }
}

这是我的电影适配器。在Actors类中我不能使用（Actors.this）。我不能将它用作itemsAdapter.getFilter().filter(char)，但通过这种方式它找不到任何东西。

public class MovieAdapter extends ArrayAdapter<Actor> {

    public MovieAdapter(Activity context, ArrayList<Actor> words) {

        super(context, 0, words);
    }


    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View listItemView = convertView;
        if (listItemView == null) {
            listItemView = LayoutInflater.from(getContext()).inflate(
                    R.layout.list_item, parent, false);
        }

        Actor currentWord = getItem(position);

        TextView songTextView = (TextView) listItemView.findViewById(R.id.Name_text_view);
        songTextView.setText((currentWord.getmPopularity()));

        final TextView singerTextView = (TextView) listItemView.findViewById(R.id.popularity_text_view);
        singerTextView.setText(currentWord.getmActor());

        ImageView iconView = (ImageView) listItemView.findViewById(R.id.list_item_icon);
        iconView.setImageResource(currentWord.getImageResourceId());


        return listItemView;
    }
}

这是演员类

package com.example.aylin.movieapp;

import java.util.Comparator;

/ ** *由Aylin于2.04.2018创建。 * /

public class Actor {
    private String mActor;
    private double mPopularity;
    private int mImageResourceId;


    public Actor(String mActor, double mPopularity, int imageResourceId){
        this.mActor = mActor;
        this.mPopularity = mPopularity;
        mImageResourceId = imageResourceId;
    }

    public String getmPopularity() {
        String pop = Double.toString(mPopularity);
        return pop; }


    public String getmActor() { return mActor; }

    public int getImageResourceId() { return mImageResourceId; }
    /*Comparator for sorting the list by roll no*/


}

忽略：afdsdgjhjgkıfgdsgjhsfdhfhafdgfhkjhılşdsfhljkipşdjlhişkdsfl

Answer 1

完全省略(Actors.this).。

匿名内部类可以引用包含方法的所有final变量。

Answer 2

我认为问题是Actor不会覆盖toString()。当然，使用ArrayAdapter.getFilter()的sh * tty文档，您要么必须猜测返回的Filter做了什么，要么查看源代码，这就是我所做的，并调用{{ 1 {} toString()负责的项目。因此，覆盖ArrayAdapter中的toString()以便它返回Actor可能会解决问题。

在edittext

2 个答案: