RadioGroup的简单封装

/**
* @outher 孙磊磊
* create at 2015/12/29 10:44
* description 单行多列选择器
*/
public class SelectRadioGroup extends RadioGroup implements CompoundButton.OnCheckedChangeListener {
private ChecdChangeListener mListener;
private int mSelectPosition;
private int mItenWidth;

public SelectRadioGroup(Context context) {
this(context, null);
}

public SelectRadioGroup(Context context, AttributeSet attrs) {
super(context, attrs);
initView();
}

private void initView() {
WindowManager wm = (WindowManager) getContext()

.getSystemService(Context.WINDOW_SERVICE);

mItenWidth = (wm.getDefaultDisplay().getWidth() - 2 * DensityUtils.dp2px(getContext(), 5)) / 3;
setGravity(Gravity.CENTER_VERTICAL);
setOrientation(LinearLayout.HORIZONTAL);
setPadding(getPx(5), getPx(5), getPx(5), getPx(5));
setItem("item1", "item2", "item3");
}

/**
* @outher 孙磊磊
* create at 2015/12/29 14:49
* description 提供数据源，设置item
*/
public void setItem(String... strings) {
removeAllViews();
for (int i = 0; i < strings.length; i++) {
addView(getItem(strings[i]));
}
setSelectItem(mSelectPosition);
}

/**
* @outher 孙磊磊
* create at 2015/12/29 14:48
* description 初始化item，设置每个item宽度为屏幕三分之一左右
*/
private RadioButton getItem(String str) {
RadioButton radioButton = new RadioButton(getContext());
LayoutParams lp = new RadioGroup.LayoutParams(mItenWidth, LayoutParams.MATCH_PARENT);
radioButton.setLayoutParams(lp);
radioButton.setButtonDrawable(new ColorDrawable(Color.TRANSPARENT));
radioButton.setGravity(Gravity.CENTER);
radioButton.setTextSize(16);
radioButton.setPadding(getPx(5), getPx(5), getPx(5), getPx(5));
radioButton.setTextColor(getContext().getResources().getColor(R.color.white));
radioButton.setOnCheckedChangeListener(this);
radioButton.setText(str);
return radioButton;
}

private int getPx(int dp) {
return DensityUtils.dp2px(getContext(), dp);
}

@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (isChecked) {
for (int i = 0; i < getChildCount(); i++) {
RadioButton rb = (RadioButton) getChildAt(i);
if (buttonView == rb) {
mSelectPosition = i;
if (mListener != null) {
mListener.seletItem(i);
}
rb.setTextColor(getContext().getResources().getColor(R.color.white));
rb.setBackgroundResource(R.drawable.round_orange);
} else {
rb.setTextColor(getContext().getResources().getColor(R.color.grey_color));
rb.setBackgroundColor(getResources().getColor(R.color.bg_def));
}
}
}
}

public interface ChecdChangeListener {
public void seletItem(int position);
}

public void setListener(ChecdChangeListener listener) {
this.mListener = listener;
}

/**
* @outher 孙磊磊
* create at 2015/12/29 14:47
* description 设置指定的item
*/
public void setSelectItem(int position) {
if (position >= 0 && position < getChildCount()) {
RadioButton rb = (RadioButton) getChildAt(position);
//            rb.setSelected(true);
rb.performClick();
}
}

/**
* @outher 孙磊磊
* create at 2015/12/29 14:47
* description 返回当前选定的item下标
*/
public int getSelectIndex() {
return mSelectPosition;
}
}

public void setItem(String... strings);

不限定item个数,不指定时默认为三个，可嵌套在HorizontalScrollView内部，用于多选项滑动

效果图如下：