从 alertdialog 检索数据并将其传递到列表视图时遇到问题

Question

有人可以帮我写下面的代码吗？

我遇到的问题是 selectedPlayer.setScore(mScore); 行在用户将数据输入警报对话框之前运行。

有没有办法修改我的代码，以便在用户将数据输入警报对话框后可以更新分数？

我觉得 arrayPlayers 被困住了，因为它是在片段的 onCreateView 中声明和填充的。有解决办法吗？

public class ScoringActivity extends AppCompatActivity {

DialogFragment mDialog;
static int mScore;

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

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

public static class PlaceholderFragment extends Fragment {

    ArrayList<Player> arrayPlayers;
    ListView listViewPlayers;
    PlayerAdapter adapter;

    public PlaceholderFragment() {
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {

        arrayPlayers = new ArrayList<Player>();

        Intent intent = getActivity().getIntent();
        int players = intent.getIntExtra("intPlayers", 0);

        for (int i = 0; i<players; i++){
            arrayPlayers.add(new Player("player " + i, 0));
        }

        adapter = new PlayerAdapter(getActivity(), arrayPlayers);


        View rootView = inflater.inflate(R.layout.fragment_activity_scoring, container, false);

        listViewPlayers = (ListView) rootView.findViewById(R.id.listview_playerscore);
        listViewPlayers.setAdapter(adapter);

        listViewPlayers.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int position, long l) {
                Player selectedPlayer = arrayPlayers.get(position);
                String playerName = selectedPlayer.getName();

                ((ScoringActivity)getActivity()).showDialogFragment(playerName);

                selectedPlayer.setScore(mScore);

            }
        });

        return rootView;
    }

    public void refresh() {
        adapter.notifyDataSetChanged();
    }

}

void showDialogFragment(String playerName) {
    mDialog = ScoreAlertDialogFragment.newInstance(playerName);
    mDialog.show(getFragmentManager(),"SCORE DIALOG");

}

// Class that creates the AlertDialog
public static class ScoreAlertDialogFragment extends DialogFragment {

    public static ScoreAlertDialogFragment newInstance(String playerName) {
        ScoreAlertDialogFragment alertFragment = new ScoreAlertDialogFragment();
        Bundle bundle = new Bundle();
        bundle.putString("PlayerName", playerName);
        alertFragment.setArguments(bundle);
        return alertFragment;
    }

    // Build AlertDialog using AlertDialog.Builder
    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        // Get the layout inflater
        LayoutInflater inflater = getActivity().getLayoutInflater();

        final View view = inflater.inflate(R.layout.alertdialog_score, null);

        final EditText editTextScore = (EditText) view.findViewById(R.id.edittext_score);

        return new AlertDialog.Builder(getActivity())
                // Inflate and set the layout for the dialog
                // Pass null as the parent view because its going in the dialog layout
                .setView(view)

                .setMessage("Enter " + getArguments().getString("PlayerName") + "'s Score:")

                //Set up Yes Button
                .setPositiveButton("OK", new DialogInterface.OnClickListener() {
                    public void onClick(final DialogInterface dialog, int id) {
                        mScore = Integer.parseInt(editTextScore.getText().toString().trim());
                    }
                })

                .setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int id) {
                        ScoreAlertDialogFragment.this.getDialog().cancel();
                    }
                })

                .create();
    }
}

@Override
public void onResume() {
    super.onResume();
    PlaceholderFragment placeholderFragment = (PlaceholderFragment) getSupportFragmentManager().findFragmentById(R.id.container); //getFragmentManager().findFragmentById(R.id.p);
    placeholderFragment.refresh();
}
}

谢谢！

Answer 1

你试过把selectedPlayer.setScore(mScore);放在Dialog的onclicklistener中吗？如果需要，您可以将 selectedPlayer 作为参数发送到对话框。

Answer 2

 ((ScoringActivity)getActivity()).showDialogFragment(selectedPlayer,view);

在内部更改分数并使用视图设置分数 IE 您将从视图中获得父级 view.getParent(); 尝试设置他们的文本。

Answer 3

您应该将 selectedPlayer 作为参数传递给 .showDialogFragment()，而不是 playerName，后者可以在方法中检索。然后在ScoreAlertDialogFragment中放置一个全局变量player，在onClick中放置player.setScore()。

listViewPlayers.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> adapterView, View view, int position, long l) {
            Player selectedPlayer = arrayPlayers.get(position);
            ((ScoringActivity)getActivity()).showDialogFragment(selectedPlayer);
        }
});

void showDialogFragment(Player player) {
    mDialog = new ScoreAlertDialogFragment(player);
    mDialog.show(getFragmentManager(),"SCORE DIALOG");
}

public static class ScoreAlertDialogFragment extends DialogFragment {

     Player player;

     public ScoreAlertDialogFragment(Player player) {
         ..
         this.player = player;
     }


 ..
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
                public void onClick(final DialogInterface dialog, int id) {
                    score = Integer.parseInt(editTextScore.getText().toString().trim());
                    player.setScore(score);
                }
            })

从 alertdialog 检索数据并将其传递到列表视图时遇到问题

Trouble retrieving and passing data from alertdialog to listview

java

android

android-listview

android-alertdialog