Question

我的fragment_main中的文本视图应该显示字符串，而是显示包名称。

TextView should show sth

在我的主要活动类中，

public class MainActivity extends ActionBarActivity {   


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

    if (savedInstanceState == null) {
        getSupportFragmentManager().beginTransaction()
                .add(R.id.container, new PlaceholderFragment()).commit();
    }
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {

    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();
    if (id == R.id.action_settings) {
        return true;
    }
    return super.onOptionsItemSelected(item);
}

/**
 * A placeholder fragment containing a simple view.
 */
public static class PlaceholderFragment extends Fragment {

    ListView main_list;
    ArrayAdapter<Cinema> adapter;
    ArrayList<Cinema> ItemList = new ArrayList<Cinema>();

    public PlaceholderFragment() {
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        Log.v("Check", "1");
        final View rootView = inflater.inflate(R.layout.fragment_main, container, false);
        ItemList.addAll(initialization());
        ListView main_list = (ListView) rootView.findViewById(R.id.mainlist);
        adapter = new ListAdapater(rootView.getContext(), ItemList);
        main_list.setAdapter(adapter);
        main_list.setOnItemClickListener(new OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> parent, View v,
                    int position, long id) {
                // TODO Auto-generated method stub
                Intent i = new Intent(rootView.getContext(), CinemaDetails.class);
                Bundle b = new Bundle();
                b.putParcelable("Cinema", ItemList.get(position));
                i.putExtra("Bundle", b);
                startActivity(i);
            }
        });
        return rootView;
    }

    public ArrayList<Cinema> initialization () {
        ArrayList<Cinema> tempItemList = new ArrayList<Cinema>();
        ArrayList<Movie> movielistone = new ArrayList<Movie>();
        Movie movieone = new Movie(101, "MovieOne", "null", 5, "nULL");
        Movie movietwo = new Movie(102, "Movietwo", "null", 3, "nuLL");
        movielistone.add(movieone);
        movielistone.add(movietwo);
        Cinema cinemaone = new Cinema(01, "test", "ygn", 55555, movielistone, 3);
        Cinema cinematwo = new Cinema(02, "test2", "ygn", 554555, movielistone, 3);
        tempItemList.add(cinemaone);
        tempItemList.add(cinematwo);
        return tempItemList;
    }
}

我使用Array Adapter，代码是

public class ListAdapater extends ArrayAdapter<Cinema> {

private LayoutInflater inflater;

public ListAdapater(Context context, List<Cinema> itemList) {
    super(context, R.layout.row, R.id.txt_cinemaname, itemList );
    inflater = LayoutInflater.from(context) ;  
    // TODO Auto-generated constructor stub
}

@Override
public Cinema getItem(int position) {
    // TODO Auto-generated method stub
    return super.getItem(position);
}



@Override
public View getView(int position, View convertView, ViewGroup parent) {
    // TODO Auto-generated method stub
    Cinema cinema = this.getItem(position);
    TextView txt_name;
    TextView txt_movie;

    if (convertView == null) {
        convertView = inflater.inflate(R.layout.row, null);
        txt_name = (TextView) convertView.findViewById(R.id.txt_cinemaname);
        txt_movie = (TextView) convertView.findViewById(R.id.txt_moviesonshow);
        convertView.setTag(new ItemViewHolder(txt_name, txt_movie));
    } else {
        ItemViewHolder viewHolder = (ItemViewHolder) convertView.getTag();
        txt_name = viewHolder.getName();
        txt_movie = viewHolder.getMoviename();
    }

    txt_name.setText("test");
    Log.v("name", txt_name.getText().toString());
    txt_movie.setText("");
    for (Movie movie : cinema.getMovieonshow()) {
        String temp = txt_movie.getText().toString();
        txt_movie.setText(temp + movie.getName() + "\n");
    }
    return super.getView(position, convertView, parent);
}

public static class ItemViewHolder {
    private TextView name;
    private TextView moviename;
    public ItemViewHolder() {}
    public ItemViewHolder(TextView name, TextView moviename) {
        super();
        this.name = name;
        this.moviename = moviename;
    }
    public TextView getName() {
        return name;
    }
    public void setName(TextView name) {
        this.name = name;
    }
    public TextView getMoviename() {
        return moviename;
    }
    public void setMoviename(TextView moviename) {
        this.moviename = moviename;
    }
}}

我之前从未遇到过这个问题。我绑定了从TextView记录文本，它显示“测试”就像我把它放在那里。有什么建议吗？谢谢你的阅读。

Answer 1

问题是

return super.getView(position, convertView, parent);

默认情况下，

ArrayAdapter使用TextView的结果填充指定资源ID的R.id.txt_cinemaname视图（在本例中为item.ToString()）（其中item }是支持数组中指定位置的对象。

由于Cinema未实现toString()，因此会生成默认文本。

使用return convertView;应该修复它。

Answer 2

我无法弄清楚，但为什么要在ListAdapter构造函数中传入R.id.txt_cinemaname？问题看起来像是在传入一个Object（该字符串“com.example ...是指向一个对象的指针，我猜一个TextView”而不是一个字符串。

此外，您不应该在convertView方法中返回super.getView(position, convertView, parent);而不是getView()吗？

Android：TextView显示包名称而不是实际文本

2 个答案: