Android Grid佈局管理器列的跨度

Question

我需要Android TV的自定義鍵盤，就像下圖中的這個一樣。 該佈局有一個Recycler View和Grid Layout Manager來定製行和列。

但是當我運行應用程序佈局不顯示按鈕的正確寬度最後一排。該 「空間」 按鈕應具有4跨度， 「Shift」 鍵2和 「零」 鍵3.

public class KeyboardButton { 
private String character; 
private int index; 

// button span size 
private int keyType; 


// Constructor 
public KeyboardButton(String character, int index, int keyType) { 
    this.character = character; 
    this.index = index; 
    this.keyType = keyType; 
} 

// Getters and Setters 
public String getCharacter() { 
    return character; 
} 

public void setCharacter(String character) { 
    this.character = character; 
} 

public int getIndex() { 
    return index; 
} 

public void setIndex(int index) { 
    this.index = index; 
} 

public int getKeyType() { 
    return keyType; 
} 

public void setKeyType(int keyType) { 
    this.keyType = keyType; 
} 

}

class KeyboardViewAdapter extends RecyclerView.Adapter<KeyboardViewAdapter.ViewHolder> { 

// List of keyboard buttons 

private ArrayList<KeyboardButton> buttons; 
private LinearLayout layout; 

// Constructor 
public KeyboardViewAdapter(ArrayList<KeyboardButton> buttons) { 
    this.buttons = buttons; 
} 

@Override 
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 

    View itemView; 
    LayoutInflater inflater = LayoutInflater.from(parent.getContext()); 

    // Create new views (invoked by the layout manager) 
    if (viewType == 1) { 
     itemView = inflater.inflate(R.layout.layout_view_keyboard_row_span_1, parent, false); 
    } else if (viewType == 2) { 
     itemView = inflater.inflate(R.layout.layout_view_keyboard_row_span_2, parent, false); 
    } else if (viewType == 3){ 
     itemView = inflater.inflate(R.layout.layout_view_keyboard_row_span_3, parent, false); 
    } else { 
     itemView = inflater.inflate(R.layout.layout_view_keyboard_row_span_4, parent, false); 
    } 

    return new ViewHolder(itemView); 
} 

@Override 
public void onBindViewHolder(final ViewHolder holder, int position) { 
    final KeyboardButton kb = buttons.get(position); 
    int itemType = getItemViewType(position); 

    holder.btnKeyboard.setBackgroundColor(Color.parseColor("#242c33")); 
    holder.btnKeyboard.setTextColor(Color.parseColor("#ffffff")); 
    holder.btnKeyboard.setText(kb.getCharacter()); 


    holder.btnKeyboard.setOnFocusChangeListener(new View.OnFocusChangeListener() { 
     @Override 
     public void onFocusChange(View v, boolean hasFocus) { 

     } 
    }); 
    holder.btnKeyboard.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      Toast.makeText(BeelineApplication.get(), kb.getCharacter(), Toast.LENGTH_SHORT).show(); 
     } 
    }); 
} 

@Override 
public int getItemCount() { 
    return buttons.size(); 
} 


public class ViewHolder extends RecyclerView.ViewHolder { 

    private Button btnKeyboard; 

    public ViewHolder(View itemView) { 
     super(itemView); 

     btnKeyboard = (Button) itemView.findViewById(R.id.btn_keyboard); 
     layout = (LinearLayout) itemView.findViewById(R.id.ll_keyboard_alphabetical); 
    } 
} 

@Override 
public int getItemViewType(int position) { 
    KeyboardButton kb = buttons.get(position); 

    if (kb.getKeyType() == 1) { 
     return 1; 
    } else if (kb.getKeyType() == 2) { 
     return 2; 
    } else if (kb.getKeyType() == 3){ 
     return 3; 
    } else { 
     return 4; 
    } 
} 

}

public class KeyboardView { 


private Context context; 

public KeyboardView(Context context) { 
    this.context = context; 
    setupView(); 
} 

private void setupView() { 
    this.inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 

    llKeyboardMain = (LinearLayout) inflater.inflate(R.layout.layout_view_keyboard_large, null); 
    GridLayoutManager gridLayoutManager = new GridLayoutManager(context, 14, GridLayoutManager.VERTICAL,false); 


    rvKeyboardRecycler = (RecyclerView) llKeyboardMain.findViewById(R.id.rv_keyboard_recycler); 
    rvKeyboardRecycler.setLayoutManager(gridLayoutManager); 

    RecyclerView.Adapter kbAdapter = new KeyboardViewAdapter(getData()); 
    rvKeyboardRecycler.setAdapter(kbAdapter); 



private ArrayList<KeyboardButton> getData() { 
    ArrayList<KeyboardButton> data = new ArrayList<>(); 

    // First row dummy data 
    data.add(new KeyboardButton("А", 0, 1)); 
    data.add(new KeyboardButton("Б", 1, 1)); 
    data.add(new KeyboardButton("В", 2, 1)); 
    data.add(new KeyboardButton("Г", 3, 1)); 
    data.add(new KeyboardButton("Д", 4, 1)); 
    data.add(new KeyboardButton("Е", 5, 1)); 
    data.add(new KeyboardButton("Ё", 6, 1)); 
    data.add(new KeyboardButton("Ж", 7, 1)); 
    data.add(new KeyboardButton("З", 8, 1)); 
    data.add(new KeyboardButton("И", 9, 1)); 
    data.add(new KeyboardButton("Й", 10, 1)); 
    data.add(new KeyboardButton("1", 11, 1)); 
    data.add(new KeyboardButton("2", 12, 1)); 
    data.add(new KeyboardButton("3", 13, 1)); 

    // Second row dummy data 
    data.add(new KeyboardButton("К", 14, 1)); 
    data.add(new KeyboardButton("Л", 15, 1)); 
    data.add(new KeyboardButton("М", 16, 1)); 
    data.add(new KeyboardButton("Н", 17, 1)); 
    data.add(new KeyboardButton("О", 18, 1)); 
    data.add(new KeyboardButton("П", 19, 1)); 
    data.add(new KeyboardButton("Р", 20, 1)); 
    data.add(new KeyboardButton("С", 21, 1)); 
    data.add(new KeyboardButton("Т", 22, 1)); 
    data.add(new KeyboardButton("У", 23, 1)); 
    data.add(new KeyboardButton("Х", 24, 1)); 
    data.add(new KeyboardButton("4", 25, 1)); 
    data.add(new KeyboardButton("5", 26, 1)); 
    data.add(new KeyboardButton("6", 27, 1)); 

    // Third row dummy data 
    data.add(new KeyboardButton("Ф", 28, 1)); 
    data.add(new KeyboardButton("Ч", 29, 1)); 
    data.add(new KeyboardButton("Ц", 30, 1)); 
    data.add(new KeyboardButton("Ш", 31, 1)); 
    data.add(new KeyboardButton("Щ", 32, 1)); 
    data.add(new KeyboardButton("Ь", 33, 1)); 
    data.add(new KeyboardButton("Ы", 34, 1)); 
    data.add(new KeyboardButton("Ъ", 35, 1)); 
    data.add(new KeyboardButton("Э", 36, 1)); 
    data.add(new KeyboardButton("Ю", 37, 1)); 
    data.add(new KeyboardButton("Я", 38, 1)); 
    data.add(new KeyboardButton("7", 39, 1)); 
    data.add(new KeyboardButton("8", 40, 1)); 
    data.add(new KeyboardButton("9", 41, 1)); 

    // Fourth row dummy data 
    data.add(new KeyboardButton("?!#", 42, 1)); 
    data.add(new KeyboardButton("ENG", 43, 1)); 
    data.add(new KeyboardButton("@", 44, 1)); 
    data.add(new KeyboardButton("Space", 45, 4)); 
    data.add(new KeyboardButton(".", 49, 1)); 
    data.add(new KeyboardButton("Shift", 50, 2)); 
    data.add(new KeyboardButton("Back", 52, 1)); 
    data.add(new KeyboardButton("0", 53, 3)); 

    return data; 
} 



public View getView() { 
    return llKeyboardMain; 
} 

}

llKeyboardMain是一個Layout文件，其中包含一個LinearLayout和RecyclerView它

Answer 1

試試這個：

gridLayoutManager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() { 
     @Override 
     public int getSpanSize(int position) { 
      return kbAdapter.getItemViewType(position); 
     } 
    });