Android 自定义View实现任意布局的RadioGroup效果

/** * 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;  }}