前言
RadioGroup是繼承LinearLayout，只支持橫向或者豎向兩種布局。所以在某些情況，比如多行多列布局，RadioGroup就并不適用 。
本篇文章通過繼承RelativeLayout實現自定義RadioGroup，實現RadioButton的任意布局。效果圖如下：
代碼(RelativeRadioGroup)
/** * Author ： BlackHao * Time : 2018/10/26 10:46 * Description : 自定義 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); //添加監聽 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; } /** * 設置選中狀態 */ private void setCheck(@IdRes int checkId, boolean isChecked) { if (checkId != -1 && this.checkId == checkId) { return; } if (checkId != -1) { CompoundButton view = (CompoundButton) findViewById(checkId); //未選中的RadioButton被選中 if (checkId != this.checkId && isChecked) { this.checkId = checkId; if (mChildOnCheckedChangeListener != null) { mChildOnCheckedChangeListener.onCheckedChanged(view, true); } //某個RadioButton被選中，將其他的改為未選中 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); } } } //被選中的RadioButton被取消選中 if (checkId == this.checkId && !isChecked) { this.checkId = checkId; if (mChildOnCheckedChangeListener != null) { mChildOnCheckedChangeListener.onCheckedChanged(view, false); } } } else { //清空所有選擇 if (this.checkId != -1) { this.checkId = -1; CompoundButton view = (CompoundButton) findViewById(this.checkId); //將選中的置為未選中 if (view instanceof RadioButton) { view.setChecked(false); } } } } public void setOnCheckedChangeListener(CompoundButton.OnCheckedChangeListener mChildOnCheckedChangeListener) { this.mChildOnCheckedChangeListener = mChildOnCheckedChangeListener; }}代碼并沒有太多，也很容易理解。有什么不明白的可以留言。
1、下載地址 ： https://github.com/LuoChen-Hao/BlackHaoCustomView
總結
以上所述是小編給大家介紹的Android 自定義View實現任意布局的RadioGroup效果，希望對大家有所幫助，如果大家有任何疑問請給我留言，小編會及時回復大家的。在此也非常感謝大家對VEVB武林網網站的支持！
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