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我希望从另一个片段调用一个方法,但它一直告诉我我的 TextViews 的值为 null ..?

玩家1:

public class PlayerTurn1 extends Fragment  {

    TextView p1Name;
    TextView p1Icon;
    Button doneP1;
    Button resetP1;
    EditText row;
    EditText column;
    TicTacToeLayout myObject = new TicTacToeLayout();
    ArrayList<String> player1;
    Bundle extras = new Bundle();
    int turn = 1;

public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);

       extras = getArguments();

       player1 = new ArrayList<String>(extras.getStringArrayList("player1"));

       Toast.makeText(getActivity(), player1.get(0), Toast.LENGTH_LONG).show();//Name of the player
       Toast.makeText(getActivity(), player1.get(1), Toast.LENGTH_LONG).show();//Icon chosen by the player

        row = (EditText) getActivity().findViewById(R.id.rowP1);
        column = (EditText) getActivity().findViewById(R.id.columnP1);
        p1Name = (TextView) getActivity().findViewById(R.id.p1NameInfo);
        p1Icon = (TextView) getActivity().findViewById(R.id.p1IconInfo);
        doneP1 = (Button) getActivity().findViewById(R.id.doneP1);
        resetP1 = (Button) getActivity().findViewById(R.id.resetP2);

        setPlayer();


        doneP1.setOnClickListener(new View.OnClickListener() {          
            public void onClick(View v) {   

                if(checkField() != false)
                {
                     int rowValueInt = Integer.parseInt(row.getText().toString());
                     int colValueInt = Integer.parseInt(column.getText().toString());

                    myObject.play(rowValueInt, colValueInt, player1.get(1));
                    callPlayer2Fragment();

                }


            }
        });
    }

player 2 片段是完全相同的代码,所以我不会费心添加它。

TicTacToeLayout 片段类:

public class TicTacToeLayout extends Fragment {

    TextView image1, image2, image3, image4, image5, image6, image7, image8, image9;
    TextView[][] images;


    public View onCreateView(LayoutInflater inflater,
    ViewGroup container, Bundle savedInstanceState) {
        return inflater.inflate(R.layout.tictactoe_layout, container, false);
    }

    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);


        image1 = (TextView) getActivity().findViewById(R.id.Image1);
        image2 = (TextView) getActivity().findViewById(R.id.Image2);
        image3 = (TextView) getActivity().findViewById(R.id.Image3);
        image4 = (TextView) getActivity().findViewById(R.id.Image4);
        image5 = (TextView) getActivity().findViewById(R.id.Image5);
        image6 = (TextView) getActivity().findViewById(R.id.Image6);
        image7 = (TextView) getActivity().findViewById(R.id.Image7);
        image8 = (TextView) getActivity().findViewById(R.id.Image8);
        image9 = (TextView) getActivity().findViewById(R.id.Image9);

        images = new TextView[][]{ {image1, image2, image3},
                                   {image4, image5, image6},
                                   {image7, image8, image9} };

        toast();
    }

    public void toast()
    {
        Toast.makeText(getActivity(), images[0][0].getText().toString(), Toast.LENGTH_LONG).show();
        Toast.makeText(getActivity(), images[0][1].getText().toString(), Toast.LENGTH_LONG).show();
        Toast.makeText(getActivity(), images[0][2].getText().toString(), Toast.LENGTH_LONG).show();
        Toast.makeText(getActivity(), images[1][0].getText().toString(), Toast.LENGTH_LONG).show();
    }

    public void play(int row, int column, String icon)
    {
            images[row-1][column-1].setText(icon);
    }

}

我只是做了一个方法来尝试烤面包,以确保数组中有东西并且它有效。但是,它仅在创建片段时才进行烘烤。不知何故,在方法调用之后 myObject.play(rowValueInt, colValueInt, player1.get(1)); ,调试器告诉我我的图像的所有值都是空的。

这是调试器所说的:

this    TicTacToeLayout  (id=830016401072)  
    image1  null    
    image2  null    
    image3  null    
    image4  null    
    image5  null    
    image6  null    
    image7  null    
    image8  null    
    image9  null    
    images  null    

row 1   
column  2   
icon    "O" (id=830016398920)   

这基本上发生在我单击完成按钮时。应该发生的是当玩家点击按钮时,在 TicTacToeLayout 片段中,位于玩家输入的任何行和列的文本视图更改为 X 或 O。行、列和图标都有各自的值,但图像在调用对象后最终为 null。有任何想法吗?我的帖子已关闭,因为显然我没有提供太多信息并且管理员很生气,所以如果您需要其他任何内容,请告诉我我会更新。

EDIT 调用位于 PlayerTurn1 中的第二个玩家片段

public void callPlayer2Fragment()
    {
        FragmentManager fm       = getFragmentManager();
        FragmentTransaction ft = fm.beginTransaction();
        Fragment Player2Frag = new PlayerTurn2();
        Player2Frag.setArguments(extras);
        ft.replace(R.id.fragment_container, Player2Frag);
        ft.commit();
    }

单击完成按钮时,将调用 PlayerTurn2 片段并从此类传递参数,但该片段被替换。

XML 布局

<?xml version="1.0" encoding="UTF-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:orientation="horizontal" >

        <FrameLayout
         android:id="@+id/fragment_container"
         android:layout_width="0px"
         android:layout_height="match_parent" 
         android:layout_weight="1" />

        <fragment
            android:id="@+id/frag2"
            android:name="As2.packageTK.TicTacToeLayout"
            android:layout_width="0px"
            android:layout_height="match_parent"
            android:layout_weight="1" />

    </LinearLayout>
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1 回答 1

0

它们全部为空的原因是片段当前不是“活动的”(即附加或创建)。您应该通过 Activity 中的接口来执行此操作。我在这里解释

于 2013-03-27T06:17:30.857 回答