前言

RadioGroup是继承LinearLayout，只支持横向或者竖向两种布局。所以在某些情况，比如多行多列布局，RadioGroup就并不适用 。

本篇文章通过继承RelativeLayout实现自定义RadioGroup，实现RadioButton的任意布局。效果图如下：

代码(RelativeRadioGroup)

/**

* Author ： BlackHao

* Time : 2018/10/26 10:46

* Description : 自定义 RadioGroup

*/

public class RelativeRadioGroup extends RelativeLayout implements CompoundButton.OnCheckedChangeListener {

private int checkId = -1;

private CompoundButton.OnCheckedChangeListener mChildOnCheckedChangeListener;

public RelativeRadioGroup(Context context) {

super(context);

}

public RelativeRadioGroup(Context context, AttributeSet attrs) {

super(context, attrs);

}

public RelativeRadioGroup(Context context, AttributeSet attrs, int defStyleAttr) {

super(context, attrs, defStyleAttr);

}

@Override

protected void onLayout(boolean changed, int l, int t, int r, int b) {

super.onLayout(changed, l, t, r, b);

//添加监听

for (int i = 0; i < getChildCount(); i++) {

View v = getChildAt(i);

if (v instanceof RadioButton && !(v instanceof CompoundButton.OnCheckedChangeListener)) {

((RadioButton) v).setOnCheckedChangeListener(this);

}

}

}

@Override

public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {

setCheck(buttonView.getId(), isChecked);

}

public void check(@IdRes int checkId) {

if (checkId == -1 || this.checkId == checkId) {

return;

}

setCheck(checkId, true);

}

public void clearCheck() {

setCheck(-1, false);

}

public int getCheckedRadioButtonId() {

return this.checkId;

}

/**

* 设置选中状态

*/

private void setCheck(@IdRes int checkId, boolean isChecked) {

if (checkId != -1 && this.checkId == checkId) {

return;

}

if (checkId != -1) {

CompoundButton view = (CompoundButton) findViewById(checkId);

//未选中的RadioButton被选中

if (checkId != this.checkId && isChecked) {

this.checkId = checkId;

if (mChildOnCheckedChangeListener != null) {

mChildOnCheckedChangeListener.onCheckedChanged(view, true);

}

//某个RadioButton被选中，将其他的改为未选中

for (int i = 0; i < getChildCount(); i++) {

View v = getChildAt(i);

if (v instanceof RadioButton && v.getId() != checkId) {

((RadioButton) v).setChecked(false);

} else if (v instanceof RadioButton && v.getId() == checkId) {

((RadioButton) v).setChecked(true);

}

}

}

//被选中的RadioButton被取消选中

if (checkId == this.checkId && !isChecked) {

this.checkId = checkId;

if (mChildOnCheckedChangeListener != null) {

mChildOnCheckedChangeListener.onCheckedChanged(view, false);

}

}

} else {

//清空所有选择

if (this.checkId != -1) {

this.checkId = -1;

CompoundButton view = (CompoundButton) findViewById(this.checkId);

//将选中的置为未选中

if (view instanceof RadioButton) {

view.setChecked(false);

}

}

}

}

public void setOnCheckedChangeListener(CompoundButton.OnCheckedChangeListener mChildOnCheckedChangeListener) {

this.mChildOnCheckedChangeListener = mChildOnCheckedChangeListener;

}

}

代码并没有太多，也很容易理解。有什么不明白的可以留言。

总结

以上所述是小编给大家介绍的Android 自定义View实现任意布局的RadioGroup效果，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对脚本之家网站的支持！