下面的代码示例会将单选按钮动态添加到组中,以便您可以使用任何布局以您喜欢的任何方式排列按钮。
布局:main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:weightSum="1" >
<RadioButton
android:id="@+id/rbtn1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight=".5"
android:text="A" />
<RadioButton
android:id="@+id/rbtn2"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight=".5"
android:text="B" />
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:weightSum="1" >
<RadioButton
android:id="@+id/rbtn3"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight=".5"
android:text="C" />
<RadioButton
android:id="@+id/rbtn4"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight=".5"
android:text="D" />
</LinearLayout>
</LinearLayout>
代码:MainActivity.xml
public class MainActivity extends Activity {
private static final String GROUP_A = "GroupA";
private static final String GROUP_B = "GroupB";
private List<RadioButton> radioButtons;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
RadioButton rbtn1 = (RadioButton) findViewById(R.id.rbtn1);
RadioButton rbtn2 = (RadioButton) findViewById(R.id.rbtn2);
RadioButton rbtn3 = (RadioButton) findViewById(R.id.rbtn3);
RadioButton rbtn4 = (RadioButton) findViewById(R.id.rbtn4);
addRadioButtonToGroup(rbtn1, GROUP_A);
addRadioButtonToGroup(rbtn2, GROUP_A);
addRadioButtonToGroup(rbtn3, GROUP_A);
addRadioButtonToGroup(rbtn4, GROUP_B);
}
private void addRadioButtonToGroup(RadioButton rbtn, String group) {
rbtn.setTag(group);
if (radioButtons == null) {
radioButtons = new ArrayList<RadioButton>();
}
radioButtons.add(rbtn);
rbtn.setOnCheckedChangeListener(new RadioButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
if (isChecked) {
for (int i = 0; i < radioButtons.size(); i++) {
RadioButton radioButton = radioButtons.get(i);
if (radioButton
.getTag()
.toString()
.equalsIgnoreCase(
buttonView.getTag().toString())) {
if (!radioButton.equals(buttonView)) {
radioButton.setChecked(false);
}
}
}
}
}
});
}
}
这里..前 3 个单选按钮将属于 A 组,其他单选按钮属于 B 组,这确保可以一次检查组中的一个单选按钮。我们也不需要 RadioGroup,并且此代码可以控制以您喜欢的方式排列单选按钮。