一个ListView行内观活动 [英] View Events inside a ListView Row

问题描述

我有一个使用自定义行布局的listactivity。布局包括2个标签，一个ImageView的和一个复选框。

Hey guys, I have a listactivity that uses a custom row layout. The layout consists of 2 labels, a imageview and a Checkbox.

我想，当复选框被选中火的监听器。监听我写的作品，但不是射击对个人行了，它会在listactivity每一行。就像如果我查一下我的第一行的复选框，对话框将打开并正常工作，但第二，第三和第四行也将火。

I'm trying to fire a listener when the Checkbox is checked. The listener I wrote works, but instead of firing for the individual row, it fires for every single row in the listactivity. Like if I check the checkbox in my first row, the dialog will open and work correctly, however the 2nd, 3rd and 4th rows will also "fire".

下面是我的code的适当区域：

Here's the appropriate area of my code:

public View getView(int position, View convertView, ViewGroup parent) {
    View v = convertView;
    if (v == null) {
        LayoutInflater vi = (LayoutInflater) getContext().getSystemService(
                Context.LAYOUT_INFLATER_SERVICE);
        v = vi.inflate(R.layout.row, null);
    }
    final item o = items.get(position);
    if (o != null) {
        TextView tt = (TextView) v.findViewById(R.id.name);
        TextView bt = (TextView) v.findViewById(R.id.game);
        CheckBox cb = (CheckBox) v.findViewById(R.id.caught);
        if (cb != null && o.getStatus()) {
            cb.setChecked(true);
        } else {
            cb.setChecked(false);
        }
        if (tt != null) {
            tt.setText(o.getName());
        }
        if (bt != null && o.getStatus()) {
            bt.setText("Game: " + o.getGame());
        }

        cb.setOnCheckedChangeListener(new OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView,
                    boolean isChecked) {
                o.setStatus(isChecked);
                if (isChecked) {
                AlertDialog.Builder builder2 = new AlertDialog.Builder(
                        context);
                builder2.setTitle("What game are we talkin gabout?");
                builder2.setItems(Checklist.GAMES,
                        new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog,
                                    int item) {
                                Toast.makeText(context,
                                        Checklist.GAMES[item],
                                        Toast.LENGTH_SHORT).show();
                                o.setGame(Checklist.GAMES[item]);
                                o.setStatus(true);
                                me.notifyDataSetChanged();
                            }
                        });
                builder2.show();
                } else {
                    o.setGame("");
                    o.setStatus(false);
                    me.notifyDataSetChanged();
                }
            }
        });
    }
    return v;

}

有没有更合适的地方建立我的复选框听众？

Is there a more appropriate place to create my listener for the checkbox?

推荐答案

我认为这不是一个好soloution每个视图与值更新时间assing新OnCheckedChangeListener。这将是最好只有一个时间设置一个监听器哪里在这个新的观点得到inflatet角度的视图。您可以通过将它变成CB的标签（setTag（..）），使其可用于监听邻对象。需要注意的是onCheckedChanged事件还激发当您通过cb.setChecked（）设置CB的状态。

I think it's not a good soloution to assing a new OnCheckedChangeListener each time a view is updated with values. It would be better setting a listener only one time to a view at the point where this new view gets inflatet. You can make o-Object available for the listener by putting it into cb's tag (setTag(..)). Note that the onCheckedChanged event also fires when you set CB's state by cb.setChecked().

例如：

CheckBox cb = null;
if (v == null) {
    LayoutInflater vi = (LayoutInflater) getContext().getSystemService(
            Context.LAYOUT_INFLATER_SERVICE);
    v = vi.inflate(R.layout.row, null);
    cb = (CheckBox) v.findViewById(R.id.caught);
    // set a listener
    cb.setOnCheckedChangeListener(new OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView,
                boolean isChecked) {
            item o = (item) buttonView.getTag();
            // show your dialog
        }
    });
}

item o = items.get(position);
if (o != null) {
    TextView tt = (TextView) v.findViewById(R.id.name);
    TextView bt = (TextView) v.findViewById(R.id.game);
    cb = (CheckBox) v.findViewById(R.id.caught);
    cb.setTag(o);
    // set checked state & text
    // ...
}

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