Android 自定义View实现任意布局的RadioGroup效果

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)

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;
  }
  
  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。

1、下载地址 ： https://github.com/LuoChen-Hao/BlackHaoCustomView

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考高分网网站的支持！