当我们使用RadioGroup时,如果文字信息较多的时候不会展示出来。。这个时候我们需要重新对RadioGroup进行处理,当信息过多的时候自动换行
也就是大家所说的流布局样式的RadioGroup
源码:
import android.content.Context; import android.util.AttributeSet; import android.view.View; import android.widget.RadioGroup; /** * 流式布局的RadioGroup */ public class FlowRadioGroup extends RadioGroup { 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); } } } }
用法和普通的RadioGroup相同,直接在xml中布局即可