当我滚动列表视图时，单选按钮被自动选择或取消选择无法保持单选按钮的状态

Question

我正在创建一个 android 应用程序，我的应用程序布局如下所示。

单击提交按钮时，我需要选中复选框和单选按钮值。

示例 Linux 未选中，cc（单选按钮）已选中。

记录在列表视图中动态填充，但我无法使其工作。问题很多。

1) 当我滚动列表视图时，单选按钮被自动选中或取消选中，无法保持单选按钮的状态。 2) 单击按钮时未获得选定的单选按钮和复选框。

下面是我的布局以及java程序。建议我获取正确的值。

enter image description here

Main.xml
<ListView
    android:id="@+id/my_list"
    android:layout_width="fill_parent"
    android:layout_height="199dp" />

<Button
    android:id="@+id/submit"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Submit"
    />

row.xml
<TextView
    android:id="@+id/label"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@+id/label"
    android:layout_toRightOf="@+id/check"
    android:textSize="20sp" >
</TextView>

<CheckBox
    android:id="@+id/check"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_marginLeft="4dip"
    android:layout_marginRight="10dip"
    android:focusable="false"

    android:focusableInTouchMode="false" >
</CheckBox>

 <RadioGroup
     android:id="@+id/radioSex"
     android:layout_width="wrap_content"
     android:layout_height="fill_parent"
     android:layout_alignParentRight="true"
     android:layout_alignParentTop="true"
     android:orientation="horizontal" >

     <RadioButton
         android:id="@+id/to"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_marginLeft="10dip"
         android:checked="true"
         android:text="To" />

     <RadioButton
         android:id="@+id/cc"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_marginLeft="10dip"
         android:text="CC" />
 </RadioGroup>

MyAdapter.java

private class ViewHolder {
    protected TextView text;
    protected CheckBox checkbox;
    protected RadioGroup radioGroup;
}

public class MyAdapter extends ArrayAdapter<Model> {

    private final List<Model> list;
    private 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;
    }

    @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.setTag(position);
            viewHolder.radioGroup = (RadioGroup) convertView.findViewById(R.id.radioSex);
            viewHolder.radioGroup.setTag(position);

            convertView.setTag(viewHolder);
        } else {
            viewHolder = (ViewHolder) convertView.getTag();
        }

        viewHolder.text.setText(list.get(position).getName());
        viewHolder.checkbox.setChecked(list.get(position).isSelected());
        viewHolder.checkbox.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                CheckBox checkbox = (CheckBox) v;
                int getPosition = (Integer) checkbox.getTag();
                list.get(getPosition).setSelected(checkbox.isChecked());
            }
        });

        viewHolder.radioGroup.setOnCheckedChangeListener(new OnCheckedChangeListener() {

            @Override
            public void onCheckedChanged(RadioGroup group, int checkedId) {
                boolean isCcOrIsTo = (checkedId == R.id.cc);
                int getPosition = (Integer) group.getTag();
                list.get(getPosition).setCcOrIsTo(isCcOrIsTo);
            }
        });

        return convertView;
    }
}

Model.java

public class Model {

    private String name;
    private boolean selected;
    private boolean isCcOrIsTo;

    public Model(String name) {
        this.name = name;
    }

    public String getName() {
        return name;
    }

    public boolean isSelected() {
        return selected;
    }

    public void setSelected(boolean selected) {
        this.selected = selected;
    }

    public boolean isCcOrIsTo() {
        return isCcOrIsTo;
    }

    public void setCcOrIsTo(boolean isCcOrIsTo) {
        this.isCcOrIsTo = isCcOrIsTo;
    }

    @Override
    public String toString() {
        String selectedString = selected ? "selected" : "not selected";
        String value = isCcOrIsTo ? "CC" : "To";
        return name+" -> "+selectedString+ " with value "+value;
    }
}

MainActivity.java

public void onCreate(Bundle icicle) {
    super.onCreate(icicle);
    setContentView(R.layout.activity_main);

    listView = (ListView) findViewById(R.id.my_list);

    btn = (Button) findViewById(R.id.submit);

    btn.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View view) {
            for (Model m : list) {
                Log.i("Stack1", m.toString());
            }
        }
    });

    ArrayAdapter<Model> adapter = new MyAdapter(this, getModel());
    listView.setAdapter(adapter);
}

Answer 1

您没有正确设置单选框和复选框的值。对于单选按钮执行此操作，它将自动选择单选组下的单选 ID 及其文本：

radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            @SuppressLint("ResourceType")
            @Override
            public void onCheckedChanged(RadioGroup group, int checkedId) {
                RadioButton radioButton = (RadioButton) group.findViewById(checkedId);
                String text= radioButton.getText().toString();
                Toast.makeText(YourActivity.this, text, Toast.LENGTH_SHORT).show();
            }
        });

对于 ceckBox :

 checkBox.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (checkBox.isChecked()) {
                   String text= checkBox.getText().toString();
                } 
            }
        });

当我滚动列表视图时，单选按钮被自动选择或取消选择无法保持单选按钮的状态

When I scroll the list view radio button gets automatically selected or deselected not able to maintain the state of radio button

checkbox

android

radio-button

android-listview