此方法是固定每行居中
使用
android:paddingLeft="@dimen/margin_common_10"
android:paddingRight="@dimen/margin_common_15"
进行调整左右间距
import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;
public class FlexBoxLayout extends ViewGroup {
/**
* 居中换行
*/
public int foxheight= 5;//换行H间隙
public FlexBoxLayout(Context context) {
this(context, null);
}
public FlexBoxLayout(Context context, AttributeSet attrs) {
super(context, attrs);
}
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int maxWidth = MeasureSpec.getSize(widthMeasureSpec);
int childCount = getChildCount();
int x = 0,y = 0,row = 0,ih=0;
for(int i = 0; i<childCount; i++){
getChildAt(i).measure(MeasureSpec.UNSPECIFIED, MeasureSpec.UNSPECIFIED);
if(getChildAt(i).getMeasuredHeight()>ih)
{
ih = getChildAt(i).getMeasuredHeight();
}
}
for (int index = 0; index < childCount; index++) {
final View child = this.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 = ih;
x += width;
y = row * height + height;
if (x > maxWidth) {
x = width;
row++;
ih = ih+foxheight;
height = ih;
y = row * (height) + height;
}
}
}
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,y = 0,row = 0,ih=0;
for(int i = 0; i<childCount; i++){
getChildAt(i).measure(MeasureSpec.UNSPECIFIED, MeasureSpec.UNSPECIFIED);
if(getChildAt(i).getMeasuredHeight()>ih)
{
ih = getChildAt(i).getMeasuredHeight();
}
}
for (int i = 0; i < childCount; i++) {
final View child = this.getChildAt(i);
if (child.getVisibility() != View.GONE ) {
int width = child.getMeasuredWidth();
int height = ih;
x += width;
y = row * height + height;
if (x > maxWidth) {
x = width;
row++;
ih = ih+foxheight;
height = ih;
y = row * (height) + height;
}
if( child.getMeasuredHeight()< ih)
{
child.layout((x - width) + getPaddingLeft(), (y - height)+(ih-child.getMeasuredHeight())/2 ,
x- + getPaddingRight(), y-(ih-child.getMeasuredHeight())/2);
}else{
child.layout((x - width) + getPaddingLeft(), y - height, x + getPaddingRight(), y);
}
}
}
}
}