Android开发之自动换行RadioGroup

最新推荐文章于 2024-03-18 20:33:53 发布

原创最新推荐文章于 2024-03-18 20:33:53 发布 · 2.6k 阅读

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#源码分享 #radiobutton #布局 #自动换行

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本文介绍了一种名为FlowRadioGroup的组件，它继承自RadioGroup并解决了Android开发中过多的RadioButton无法一行显示完的问题，有效改善了用户体验。

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Android开发中，RadioGroup组件无论设置横排显示还是竖排显示，都无法使过多的RadioButton一行显示完自动跳到下一行，影响用户体验。FlowRadioGroup 继承RadioGroup ，很好的解决了这一问题。

import android.widget.RadioGroup;
 import android.content.Context;
 import android.util.AttributeSet;
 import android.view.View
/**
 * 流式布局的RadioGroup
 */
 public class FlowRadioGroup extends RadioGroup {</p>
public FlowRadioGroup(Context context) {
 super(context);
 }
public FlowRadioGroup(Context context, AttributeSet attrs) {
 super(context, attrs);
 }
@Override
 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
 int maxWidth = MeasureSpec.getSize(widthMeasureSpec);
 int childCount = getChildCount();
 int x = 0;
 int y = 0;
 int row = 0;
 for (int index = 0; index < childCount; index++) {
 final View child = getChildAt(index);
 if (child.getVisibility() != View.GONE) {
 child.measure(MeasureSpec.UNSPECIFIED, MeasureSpec.UNSPECIFIED);
 // 此处增加onlayout中的换行判断，用于计算所需的高度
 int width = child.getMeasuredWidth();
 int height = child.getMeasuredHeight();
 x += width;
 y = row * height + height;
 if (x > maxWidth) {
 x = width;
 row++;
 y = row * height + height;
 }
 }
 }
 // 设置容器所需的宽度和高度
 setMeasuredDimension(maxWidth, y);
 }
@Override
 protected void onLayout(boolean changed, int l, int t, int r, int b) {
 final int childCount = getChildCount();
 int maxWidth = r - l;
 int x = 0;
 int y = 0;
 int row = 0;
 for (int i = 0; i < childCount; i++) {
 final View child = this.getChildAt(i);
 if (child.getVisibility() != View.GONE) {
 int width = child.getMeasuredWidth();
 int height = child.getMeasuredHeight();
 x += width;
 y = row * height + height;
 if (x > maxWidth) {
 x = width;
 row++;
 y = row * height + height;
 }
 child.layout(x - width, y - height, x, y);
 }
 }
 }
 }