java - 复选框数据未在其他 Activity 中传递

Question

我试图借助 Intent 将 ListView 中存在的复选框的位置传递给另一个 Activity 。但它显示我在另一项 Activity 中无效。或者有人可以告诉我如何使用下面的代码将选定的复选框数据传递到另一个 Activity ？

我想将相应复选框的 ListView 中的值存储在数组中。然后转移到另一个 Activity

public class MyAdapter extends ArrayAdapter<Model> {
int getPosition;
Intent in;
private final List<Model> list;
public final Activity context;
boolean checkAll_flag = false;
boolean checkItem_flag = false;

public MyAdapter(Activity context, List<Model> list) {
    super(context, R.layout.row, list);
    this.context = context;
    this.list = list;
}

static class ViewHolder {
    protected TextView text;
    protected CheckBox checkbox;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {

    ViewHolder viewHolder = null;
    if (convertView == null) {
        LayoutInflater inflator = context.getLayoutInflater();
        convertView = inflator.inflate(R.layout.row, null);
        viewHolder = new ViewHolder();
        viewHolder.text = (TextView) convertView.findViewById(R.id.label);
        viewHolder.checkbox = (CheckBox) convertView
                .findViewById(R.id.check);
        viewHolder.checkbox
                .setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {

                    @Override
                    public void onCheckedChanged(CompoundButton buttonView,
                            boolean isChecked) {
                         getPosition = (Integer) buttonView.getTag(); // setTag.

                    }
                });
        convertView.setTag(viewHolder);
        convertView.setOnClickListener(new MyCustomItemClickListener(getPosition));

        convertView.setTag(R.id.label, viewHolder.text);
        convertView.setTag(R.id.check, viewHolder.checkbox);
    } else {
        viewHolder = (ViewHolder) convertView.getTag();
    }
    viewHolder.checkbox.setTag(position); // This line is important.

    viewHolder.text.setText(list.get(position).getName());
    viewHolder.checkbox.setChecked(list.get(position).isSelected());

    return convertView;
}

class MyCustomItemClickListener implements OnClickListener {

    MyCustomItemClickListener(int getPositionx) {
        /*
         * Whatever initialization you need can be done here. You can pass
         * values in constructor when calling it from getview and use with
         * intent extras
         */
         in = new Intent(context, YourActivity.class);
         in.putExtra("aa", getPositionx);
    }

    @Override
    public void onClick(View arg0) {
        // Launch Activity

        context.startActivity(in);
    }

  }
}

Answer 1

按照下面的方法尝试一下。无需在构造函数内传递 getPositionx，因为您已经在类中全局定义了它。

class MyCustomItemClickListener implements OnClickListener {

    MyCustomItemClickListener() {
        /*
         * Whatever initialization you need can be done here. You can pass
         * values in constructor when calling it from getview and use with
         * intent extras
         */

    }

    @Override
    public void onClick(View arg0) {
        // Launch Activity

   in = new Intent(context, YourActivity.class);
         in.putExtra("aa", getPositionx);

        context.startActivity(in);
    }

}

并将您的初始化更改为

convertView.setOnClickListener(new MyCustomItemClickListener());