我正在尝试使用自定义视图实现一个radiobuttons,如下面的屏幕截图所示。
单选按钮的计数将是动态的。我尝试创建Radiogroup
并使用RadioButton
以编程方式将RadioGroup
添加到addView
。但是在附加的屏幕截图中不可能setText
。因此,我计划添加LinearLayout
,OnClick
时LinearLayout
我将RadioButton
启用LinearLayout
,并禁用其余内容。是否是正确的方法,或者是否有其他方法来实现它。
我也经常搜索。但我无法找到类似的东西。所以,请有人建议我正确的方法。
答案 0 :(得分:6)
您可以使用自定义列表视图执行此操作。
activity_list_view.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ListView
android:id="@+id/radioGroup"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"/>
</RelativeLayout>
自定义列表项:radio_button_item.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/radioButtonLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:orientation="horizontal"
android:descendantFocusability="blocksDescendants"
android:layout_margin="10dp">
<RadioButton
android:id="@+id/radioButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:checked="false"
android:text="" />
<LinearLayout
android:layout_width="0dp"
android:layout_weight="0.9"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_marginLeft="10dp">
<TextView
android:id="@+id/textCode"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Code XYZ" />
<TextView
android:id="@+id/textCond"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="2dp"
android:text="Rs.100 off if you purchase more than.." />
</LinearLayout>
<TextView
android:id="@+id/textValid"
android:layout_weight="0.2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="right"
android:text="Valid until dd/mm/yyyy" />
</LinearLayout>
现在使用自定义适配器从Activity:
添加内容public class RadioButtonActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_list_view);
// RadioGroup radioGroup = (RadioGroup) findViewById(R.id.radioGroup);
final List<ItemContents> saveItems = new ArrayList<>();
String code = null, condition = null, valid = null;
// save your values here to the ItemContent List. usign dummy values as of now
for (int i = 1; i < 6; i++) {
code = "CodeXYZ000" + i;
condition = "Purchase More than Rs." + i + "00";
valid = "Valid until Dec 30";
saveItems.add(itemContents(i, code, condition, valid));
}
final CustomAdapter adapter = new CustomAdapter(this, R.layout.activity_list_view, saveItems);
ListView listView = (ListView) findViewById(R.id.radioGroup);
listView.setAdapter(adapter);
listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
adapter.setSelectedIndex(position); // set selected position and notify the adapter
adapter.notifyDataSetChanged();
}
});
}
private static ItemContents itemContents(int i, final String code, final String condition, final String valid) {
ItemContents itemContent = new ItemContents();
itemContent.setId(i);
itemContent.setmCode(code);
itemContent.setmCondition(condition);
itemContent.setmValid(valid);
return itemContent;
}
}
自定义适配器:
public class CustomAdapter extends ArrayAdapter<ItemContents> {
int selectedIndex = -1;
public CustomAdapter(Context context, int activity_radio_button, List<ItemContents> saveItems) {
super(context, activity_radio_button, saveItems);
}
public void setSelectedIndex(int index) {
selectedIndex = index;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
if (v == null) {
LayoutInflater vi;
vi = LayoutInflater.from(getContext());
v = vi.inflate(R.layout.radio_button_item, null);
}
RadioButton rbSelect = (RadioButton) v
.findViewById(R.id.radioButton);
if(selectedIndex == position){ // check the position to update correct radio button.
rbSelect.setChecked(true);
}
else{
rbSelect.setChecked(false);
}
ItemContents itemContents = getItem(position);
if (itemContents != null) {
TextView textCode = (TextView) v.findViewById(R.id.textCode);
TextView textCond = (TextView) v.findViewById(R.id.textCond);
TextView textValid = (TextView) v.findViewById(R.id.textValid);
textCode.setText(itemContents.getmCode());
textCond.setText(itemContents.getmCondition());
textValid.setText(itemContents.getmValid());
}
return v;
}
}
你的输出(我在电视上工作,所以大屏幕)
[