Android：TextView顯示包名而不是實際文本

Question

我的fragment_main中的文本視圖應該顯示字符串，而是顯示包名。

在我的主要活動類，

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; 
    } 
} 

我使用數組適配器和它的代碼是

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; 
    } 
}} 

我從未有過這個問題。我綁定從TextView日誌文本，它顯示「測試」就像我把它放在那裏。任何建議？謝謝閱讀。

Answer 1

我不能完全弄清楚，但爲什麼你在你的ListAdapter構造函數中傳入R.id.txt_cinemaname？這個問題看起來像你傳遞一個對象（該字符串「com.example ...是一個指向對象的指針，我猜TextView），而不是一個字符串。

此外，你不應該返回convertView而不是super.getView(position, convertView, parent);在getView()方法？

Answer 2

問題是

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

ArrayAdapter，默認情況下，填充在指定的資源ID的TextView視圖（在這種情況下R.id.txt_cinemaname）與item.ToString()結果（其中item是支持數組中指定位置的對象）。

由於Cinema未執行toString()，因此會生成默認文本。

使用return convertView;應該修復它。