Question

我通过可编辑的文本将数据添加到listview，listview是自定义的，每行包含textview和一个复选框，现在每当我点击每行的复选框时我想要一个Toast消息出现我正在自定义适配器上实现View.OnClickListener，并通过OnClick方法设置if else条件，以便我的toast消息可以出现但这里的问题是在填充listview时复选框根本不起作用，我认为问题可能是转换视图可能错误地膨胀，或者复选框可能正在使用错误的视图，有人可以帮我解决这个问题吗？

public class todoFragment extends ListFragment{

private EditText mToDoField;
private Button mAdd;
UsersAdapter mAdapter;
private TextView todoTextView;
private CheckBox todoCheckBox;


@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    getActivity().setTitle(R.string.todo_title);
}

public class UsersAdapter extends ArrayAdapter<String> implements View.OnClickListener{

    public Context context;
    public ArrayList<String> values;

    public UsersAdapter(Context context, ArrayList<String> values) {
        super(context, 0, values);

        this.context = context;
        this.values = values;
    }

   @Override
    public void onClick(View view) {

        todoCheckBox.setOnClickListener(this);

        if (todoCheckBox.isChecked()){
            Toast.makeText(getContext(), "CheckBox is clicked.", Toast.LENGTH_LONG).show();
        }
        else{
            Toast.makeText(getContext(), "CheckBox is not clicked.", Toast.LENGTH_LONG).show();
        }
    }

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

        LayoutInflater inflater = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        convertView = LayoutInflater.from(getContext()).inflate(R.layout.todo_list, parent, false);

        todoTextView = (TextView) convertView.findViewById(R.id.todo_TextView);
        todoCheckBox = (CheckBox) convertView.findViewById(R.id.todo_CheckBox);

        todoTextView.setText(values.get(position));

        return convertView;
    }
}



@TargetApi(9) // remember this for isEmpty()
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    View v = inflater.inflate(R.layout.fragment_todo, container, false);

    ArrayList<String> todoList = new ArrayList<String>();
    mAdapter = new UsersAdapter(getActivity(), todoList);
    ListView listViewToDo = (ListView) v.findViewById (android.R.id.list);
    listViewToDo.setAdapter(mAdapter);

    mToDoField = (EditText) v.findViewById(R.id.todo_editText);

    mAdd = (Button)v.findViewById(R.id.add_button);
    mAdd.setOnClickListener(new View.OnClickListener() {
        @Override
            public void onClick(View view) {

            String toDo = mToDoField.getText().toString().trim();

            if (toDo.isEmpty()){

            }

            mAdapter.add(toDo);

            mToDoField.setText("");
        }
    });

    return v;
}

Answer 1

我建议您在Adapter类的Marshal.Copy中实现using System; using System.Text; using System.Runtime.InteropServices; namespace ConsoleApplication1 { public unsafe struct MyStruct { private const int floatArrayLength = 4; private fixed float _floatArray[floatArrayLength]; public float[] floatArray { get { float[] result = new float[floatArrayLength]; fixed (float* ptr = _floatArray) { Marshal.Copy((IntPtr)ptr, result, 0, floatArrayLength); } return result; } set { int length = Math.Min(floatArrayLength, value.Length); fixed (float* ptr = _floatArray) { Marshal.Copy(value, 0, (IntPtr)ptr, length); for (int i = length; i < floatArrayLength; i++) ptr[i] = 0; } } } } class Program { static void WriteArray(float[] arr) { foreach (float value in arr) { Console.Write(value); Console.Write(" "); } Console.WriteLine(); } static void Main(string[] args) { MyStruct myStruct = new MyStruct(); WriteArray(myStruct.floatArray); myStruct.floatArray = new float[] { 1, 2, 3, 4 }; WriteArray(myStruct.floatArray); myStruct.floatArray = new float[] { 5, 6 }; WriteArray(myStruct.floatArray); Console.ReadLine(); } } }，在其中为ListRow定义CheckBox。

喜欢，（可能是下面代码中的代码格式错误）

setOnCheckedChangeListener

从适配器中删除getView()。

Answer 2

我认为以下两件事可以帮助您使复选框可点击

- ＆GT;＆GT;在todo_list布局的父ViewGroup中添加android：descendantFocusability =“blocksDescendants”

- ＆GT;＆GT;在todo_CheckBox视图的定义中添加android：clickable =“true”

有一次，您可以开始看到点击屏幕上的复选框，因为用户370305正确地提到了使用OnCheckedChangeListener而不是OnCliclListener检测到复选框的检查

尝试使用自定义适配器在自定义todolist中实现CheckBox时遇到问题？

2 个答案: