Question

在使用FastAdapter和ConstraintLayout的应用程序中，我显示已完成游戏的列表（请截取屏幕截图中非英语字符）：

当应用程序用户单击列表中的项目（项目中的任意位置）时，我想显示带有方形游戏板的图像视图，并将正图像视图更改为减号：

为此，我已经准备了一种方法：

private void toggleDetails() {
    if (mBoard.getVisibility() == View.GONE) {
        mBoard.setVisibility(View.VISIBLE);
        mDetails.setImageResource(R.drawable.minus_circle_gray);
    } else {
        mBoard.setVisibility(View.GONE);
        mDetails.setImageResource(R.drawable.plus_circle_gray);
    }
}

但是我的问题是我不确定在哪里调用该方法。

我应该将单击侦听器添加到快速适配器对象还是应该将其添加到视图持有者？

另外，在查看ExpandableSampleActivity示例时，我注意到有一些动画，并且想知道如何动画化我对mBoard图像视图的显示...

下面是我当前的源代码：

public class FinishedGameItem extends AbstractItem<FinishedGameItem, FinishedGameItem.ViewHolder> {
    private final static String WON = "won";
    private final static String LOST = "lost";

    public long stamp;
    public int gid;
    public int score1;
    public int score2;
    public int elo1;
    public int elo2;
    public String state1;
    public String finished;
    public String given1;
    public String given2;
    public String photo1;
    public String photo2;

    @Override
    public int getType() {
        return R.id.finished_game_item_id;
    }

    @Override
    public int getLayoutRes() {
        return R.layout.item_finished_game;
    }

    @NonNull
    @Override
    public ViewHolder getViewHolder(@NonNull View v) {
        return new ViewHolder(v);
    }

    protected static class ViewHolder extends FastAdapter.ViewHolder<FinishedGameItem> {
        private ImageView mDetails;
        private TextView mGid;
        private TextView mFinished;
        private TextView mScore1;
        private TextView mScore2;
        private TextView mGiven1;
        private TextView mGiven2;
        private TextView mElo1;
        private TextView mElo2;
        private ImageView mPhoto1;
        private ImageView mPhoto2;
        private ImageView mBoard;

        public ViewHolder(View view) {
            super(view);
            mDetails = view.findViewById(R.id.details);
            mGid = view.findViewById(R.id.gid);
            mFinished = view.findViewById(R.id.finished);
            mScore1 = view.findViewById(R.id.score1);
            mScore2 = view.findViewById(R.id.score2);
            mGiven1 = view.findViewById(R.id.given1);
            mGiven2 = view.findViewById(R.id.given2);
            mElo1 = view.findViewById(R.id.elo1);
            mElo2 = view.findViewById(R.id.elo2);
            mPhoto1 = view.findViewById(R.id.photo1);
            mPhoto2 = view.findViewById(R.id.photo2);
            mBoard = view.findViewById(R.id.board);
        }

        @Override
        public void bindView(@NonNull FinishedGameItem item, @NonNull List<Object> payloads) {
            Context ctx = mDetails.getContext();
            Resources res = mDetails.getResources();

            String result = (WON.equals(item.state1) ? "Victory" : (LOST.equals(item.state1) ? "Loss" : "Draw"));

            mDetails.setImageResource(R.drawable.plus_circle_gray);
            mBoard.setVisibility(View.GONE);

            mGid.setText(r.getString(R.string.str_game, item.gid));
            mFinished.setText(result + " / " + item.finished);
            mScore1.setText(res.getString(R.string.str_score, item.score1));
            mScore2.setText(res.getString(R.string.str_score, item.score2));
            mGiven1.setText(item.given1);
            mGiven2.setText(item.given2);
            mElo1.setText(String.valueOf(item.elo1));
            mElo2.setText(String.valueOf(item.elo2));

            if (URLUtil.isHttpsUrl(item.photo1)) {
                Picasso.with(ctx))
                        .load(item.photo1)
                        .placeholder(R.drawable.account_gray)
                        .into(mPhoto1);
            }

            if (URLUtil.isHttpsUrl(item.photo2)) {
                Picasso.with(ctx)
                        .load(item.photo2)
                        .placeholder(R.drawable.account_gray)
                        .into(mPhoto2);
            }

            Picasso.with(ctx)
                    .load("http://slova.de/words/board2.php?gid=" + item.gid)
                    .placeholder(R.drawable.checkerboard_gray)
                    .into(mBoard);
        }

        @Override
        public void unbindView(@NonNull FinishedGameItem item) {
            Context ctx = mDetails.getContext();

            Picasso.with(ctx).cancelRequest(mPhoto1);
            Picasso.with(ctx).cancelRequest(mPhoto2);
            Picasso.with(ctx).cancelRequest(mBoard);

            mDetails.setImageDrawable(null);
            mGid.setText(null);
            mFinished.setText(null);
            mScore1.setText(null);
            mScore2.setText(null);
            mGiven1.setText(null);
            mGiven2.setText(null);
            mElo1.setText(null);
            mElo2.setText(null);
            mPhoto1.setImageDrawable(null);
            mPhoto2.setImageDrawable(null);
            mBoard.setImageDrawable(null);
        }

        // WHERE TO CALL THIS METHOD AND HOW TO ANIMATE?

        private void toggleDetails() {
            if (mBoard.getVisibility() == View.GONE) {
                mBoard.setVisibility(View.VISIBLE);
                mDetails.setImageResource(R.drawable.minus_circle_gray);
            } else {
                mBoard.setVisibility(View.GONE);
                mDetails.setImageResource(R.drawable.plus_circle_gray);
            }
        }
    }
}

我也在Github issue 713

问了我的问题

更新：

我尝试向模型中添加布尔值details并在bindView方法中使用它（true表示显示mBoard），但是该应用程序现在表现不正常，详细信息错误显示，并且单击后不会立即显示-

这是新的Fragment源代码：

mFastAdapter.withSelectable(true);
mFastAdapter.withOnClickListener(new OnClickListener<FinishedGameItem>() {
    @Override
    public boolean onClick(View v, @NonNull IAdapter<FinishedGameItem> adapter, @NonNull FinishedGameItem item, int position) {
        item.details = !item.details;

        // THIS METHOD IS CALLED IN DEBUGGER, BUT VIEWS ARE NOT UPDATED

        return true;
    }
});

这是更改后的FinishedGameItem模型：

public class FinishedGameItem extends AbstractItem<FinishedGameItem, FinishedGameItem.ViewHolder> {
    private final static String WON = "won";
    private final static String LOST = "lost";

    public boolean details; // TRIED TO ADD THIS BOOLEAN
    public long stamp;
    public int gid;
    public int score1;
    public int score2;
    public int elo1;
    public int elo2;
    public String state1;
    public String finished;
    public String given1;
    public String given2;
    public String photo1;
    public String photo2;

    @Override
    public int getType() {
        return R.id.finished_game_item_id;
    }

    @Override
    public int getLayoutRes() {
        return R.layout.item_finished_game;
    }

    @NonNull
    @Override
    public ViewHolder getViewHolder(@NonNull View v) {
        return new ViewHolder(v);
    }

    protected static class ViewHolder extends FastAdapter.ViewHolder<FinishedGameItem> {
        private ImageView mDetails;
        private TextView mGid;
        private TextView mFinished;
        private TextView mScore1;
        private TextView mScore2;
        private TextView mGiven1;
        private TextView mGiven2;
        private TextView mElo1;
        private TextView mElo2;
        private ImageView mPhoto1;
        private ImageView mPhoto2;
        private ImageView mBoard;

        public ViewHolder(View view) {
            super(view);
            mDetails = view.findViewById(R.id.details);
            mGid = view.findViewById(R.id.gid);
            mFinished = view.findViewById(R.id.finished);
            mScore1 = view.findViewById(R.id.score1);
            mScore2 = view.findViewById(R.id.score2);
            mGiven1 = view.findViewById(R.id.given1);
            mGiven2 = view.findViewById(R.id.given2);
            mElo1 = view.findViewById(R.id.elo1);
            mElo2 = view.findViewById(R.id.elo2);
            mPhoto1 = view.findViewById(R.id.photo1);
            mPhoto2 = view.findViewById(R.id.photo2);
            mBoard = view.findViewById(R.id.board);
        }

        @Override
        public void bindView(@NonNull FinishedGameItem item, @NonNull List<Object> payloads) {
            Context ctx = mDetails.getContext();
            Resources res = mDetails.getResources();

            String result = (WON.equals(item.state1) ? "Victory" : (LOST.equals(item.state1) ? "Loss" : "Draw"));

            mDetails.setImageResource(item.details ? R.drawable.minus_circle_gray : R.drawable.plus_circle_gray);
            mBoard.setVisibility(item.details ? View.VISIBLE : View.GONE);

            mGid.setText(res.getString(R.string.str_game, item.gid));
            mFinished.setText(result + " / " + item.finished);
            mScore1.setText(res.getString(R.string.str_score, item.score1));
            mScore2.setText(res.getString(R.string.str_score, item.score2));
            mGiven1.setText(item.given1);
            mGiven2.setText(item.given2);
            mElo1.setText(String.valueOf(item.elo1));
            mElo2.setText(String.valueOf(item.elo2));

            if (URLUtil.isHttpsUrl(item.photo1)) {
                Picasso.with(ctx)
                        .load(item.photo1)
                        .placeholder(R.drawable.account_gray)
                        .into(mPhoto1);
            }

            if (URLUtil.isHttpsUrl(item.photo2)) {
                Picasso.with(ctx)
                        .load(item.photo2)
                        .placeholder(R.drawable.account_gray)
                        .into(mPhoto2);
            }

            if (item.details) {
                Picasso.with(ctx)
                        .load("http://slova.de/words/board2.php?gid=" + item.gid)
                        .placeholder(R.drawable.checkerboard_gray)
                        .into(mBoard);
            }
        }

        @Override
        public void unbindView(@NonNull FinishedGameItem item) {
            Context ctx = mDetails.getContext();

            Picasso.with(ctx).cancelRequest(mPhoto1);
            Picasso.with(ctx).cancelRequest(mPhoto2);
            Picasso.with(ctx).cancelRequest(mBoard);

            mDetails.setImageDrawable(null);
            mGid.setText(null);
            mFinished.setText(null);
            mScore1.setText(null);
            mScore2.setText(null);
            mGiven1.setText(null);
            mGiven2.setText(null);
            mElo1.setText(null);
            mElo2.setText(null);
            mPhoto1.setImageDrawable(null);
            mPhoto2.setImageDrawable(null);
            mBoard.setImageDrawable(null);
        }
    }
}

该应用程序可以正常运行，但不正常：

Answer 1

从您的代码来看，您似乎忘记了实际上告诉适配器您的支持模型（FinishedGameItem）已更改。呼叫notifyItemChanged(position)可能会有帮助。

mFastAdapter.withSelectable(true);
mFastAdapter.withOnClickListener(new OnClickListener<FinishedGameItem>() {
    @Override
    public boolean onClick(View v, @NonNull IAdapter<FinishedGameItem> adapter, @NonNull FinishedGameItem item, int position) {
        item.details = !item.details;

        mFastAdapter.notifyItemChanged(position);

        return true;
    }
});

单击该项目后，在RecyclerView + FastAdapter中显示更多详细信息

1 个答案: