/**
* @Module :
* @Comments : 流式RadioGroup
* @Author : ChengBin
* @CreateDate : 16/6/1 上午10:17
* @ModifiedBy :
* @ModifiedDate:
* @Modified :
*/
public class FlowRadioGroup extends RadioGroup {
List> mAllViews;//保存所有行的所有View
List mLineHeight;//保存每一行的行高
public FlowRadioGroup(Context context) {
this(context, null);
}
public FlowRadioGroup(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
private void init() {
setOrientation(LinearLayout.HORIZONTAL);
}
/**
* 获取选中按钮的索引,从开始, 未选中返回 -1
*/
public int getCheckedRadioButtonIndex() {
return indexOfChild(findViewById(getCheckedRadioButtonId()));
}
/**
* 获取选中按钮的文本,未选中 返回 空字符串
*/
public String getCheckedRadioButtonText() {
if (getCheckedRadioButtonId() == -1) {
return "";
}
return ((RadioButton) findViewById(getCheckedRadioButtonId())).getText().toString();
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int sizeWidth = MeasureSpec.getSize(widthMeasureSpec);
int modeWidth = MeasureSpec.getMode(widthMeasureSpec);
int sizeHeight = MeasureSpec.getSize(heightMeasureSpec);
int modeHeight = MeasureSpec.getMode(heightMeasureSpec);
int width = 0, height = 0;
int lineWidth = 0, lineHeight = 0;
int childWidth = 0, childHeight = 0;
mAllViews = new ArrayList<>();
mLineHeight = new ArrayList<>();
List lineViews = new ArrayList<>();
int count = getChildCount();
for (int i = 0; i < count; i++) {
View child = getChildAt(i);
if (child.getVisibility() == View.GONE) {
continue;
}
measureChild(child, widthMeasureSpec, heightMeasureSpec);
LinearLayout.LayoutParams params = (LinearLayout.LayoutParams) child.getLayoutParams();
childWidth = child.getMeasuredWidth() + params.leftMargin + params.rightMargin;
childHeight = child.getMeasuredHeight() + params.topMargin + params.bottomMargin;
if (lineWidth + childWidth > sizeWidth - getPaddingLeft() - getPaddingRight()) {
width = Math.max(width, lineWidth);
height += lineHeight;
mLineHeight.add(lineHeight);
mAllViews.add(lineViews);
lineWidth = childWidth;
lineHeight = childHeight;
lineViews = new ArrayList<>();
} else {
lineWidth += childWidth;
lineHeight = Math.max(childHeight, lineHeight);
}
lineViews.add(child);
if (i == (count - 1)) {
width = Math.max(width, lineWidth);
height += lineHeight;
}
}
mLineHeight.add(lineHeight);
mAllViews.add(lineViews);
width += getPaddingLeft() + getPaddingRight();
height += getPaddingTop() + getPaddingBottom();
setMeasuredDimension(modeWidth == MeasureSpec.AT_MOST ? width : sizeWidth, modeHeight == MeasureSpec.AT_MOST ? height : sizeHeight);
}
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
int top = getPaddingTop();//开始布局子view的 top距离
int left = getPaddingLeft();//开始布局子view的 left距离
int lineNum = mAllViews.size();//行数
List lineView;
int lineHeight;
for (int i = 0; i < lineNum; i++) {
lineView = mAllViews.get(i);
lineHeight = mLineHeight.get(i);
for (int j = 0; j < lineView.size(); j++) {
View child = lineView.get(j);
if (child.getVisibility() == View.GONE) {
continue;
}
LinearLayout.LayoutParams params = (LinearLayout.LayoutParams) child.getLayoutParams();
int ld = left + params.leftMargin;
int td = top + params.topMargin;
int rd = ld + child.getMeasuredWidth();//不需要加上 params.rightMargin,
int bd = td + child.getMeasuredHeight();//不需要加上 params.bottomMargin, 因为在 onMeasure , 中已经加在了 lineHeight 中
child.layout(ld, td, rd, bd);
left += child.getMeasuredWidth() + params.leftMargin + params.rightMargin;//因为在 这里添加了;
}
left = getPaddingLeft();
top += lineHeight;
}
}
@Override
protected void onFinishInflate() {
super.onFinishInflate();
// check(getChildAt(0).getId());//默认按钮
}
@Override
protected Parcelable onSaveInstanceState() {
Parcelable superState = super.onSaveInstanceState();
return new SavedState(superState, getCheckedRadioButtonIndex());
}
@Override
protected void onRestoreInstanceState(Parcelable state) {
SavedState ss = (SavedState) state;
super.onRestoreInstanceState(ss.getSuperState());
setCheckedStateForView(ss.checkIndex, true);
}
private void setCheckedStateForView(int checkIndex, boolean checked) {
View checkedView = getChildAt(checkIndex);
if (checkedView != null && checkedView instanceof RadioButton) {
((RadioButton) checkedView).setChecked(checked);
}
}
public static class SavedState extends BaseSavedState {
public static final Creator CREATOR = new Creator() {
@Override
public SavedState createFromParcel(Parcel in) {
return new SavedState(in);
}
@Override
public SavedState[] newArray(int size) {
return new SavedState[size];
}
};
private int checkIndex;//选中按钮的索引
public SavedState(Parcelable parcel, int checkIndex) {
super(parcel);
this.checkIndex = checkIndex;
}
private SavedState(Parcel in) {
super(in);
checkIndex = in.readInt();
}
@Override
public void writeToParcel(Parcel out, int flags) {
super.writeToParcel(out, flags);
out.writeInt(checkIndex);
}
}
}
新建RadioButton
public RadioButton newRadioButton(Context mContext, String text, int id) {
float density = mContext.getResources().getDisplayMetrics().density;
RadioButton radioButton = new RadioButton(mContext);
radioButton.setButtonDrawable(android.R.color.transparent);
radioButton.setId(id);
radioButton.setBackgroundResource(R.drawable.bg_radio);
int[][] states = new int[][]{
new int[]{android.R.attr.state_checked},
new int[]{}
};
int[] colors = new int[]{
mContext.getResources().getColor(R.color.white),
mContext.getResources().getColor(R.color.text_black)
};
ColorStateList list = new ColorStateList(states, colors);
radioButton.setTextColor(list);
radioButton.setText(text);
radioButton.setTextSize(11);
radioButton.setGravity(Gravity.CENTER);
int margin = (int) (5 * density);
radioButton.setPadding(margin, margin, margin, margin);
RadioGroup.LayoutParams layoutParams = new RadioGroup.LayoutParams(RadioGroup.LayoutParams.WRAP_CONTENT,
RadioGroup.LayoutParams.WRAP_CONTENT);
layoutParams.setMargins(margin, margin, margin, margin);
radioButton.setLayoutParams(layoutParams);
return radioButton;
}