我有两个自定义 viewgroups，superViewGroup 和 subViewGroup。 subview 组包含 View 。我将我的 superviewgroup 添加到 linearLayout 并将 subViewGroups 添加到我的 superviewgroup。
正在调用 superviewgroup onMeasure() 但不在 subviewgroup 中。但在这两种情况下，都会调用 onLayout() 方法。
代码如下
public class SuperViewGroup extends ViewGroup{
public SuperViewGroup(Context context) {
super(context);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
Log.i("boxchart","INSIDE ON MEASURE SUPER VIEWGROUP");
}
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
final int count = getChildCount();
for (int i = 0; i < count; i++) {
final View child = getChildAt(i);
if (child.getVisibility() != View.GONE) {
child.layout(0, 0, getWidth(), getHeight());
}
}
}
}
public class SubViewGroup extends ViewGroup{
public SubViewGroup(Context context) {
super(context);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
Log.i("boxchart","INSIDE ON MEASURE SUB VIEWGROUP");
}
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
final int count = getChildCount();
for (int i = 0; i < count; i++) {
final View child = getChildAt(i);
if (child.getVisibility() != View.GONE) {
child.layout(0, 0, getWidth(), getHeight());
}
}
}
}
欢迎评论。提前致谢。
最佳答案
因为您必须实际将度量传递给 subview :
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
Log.i("boxchart","INSIDE ON MEASURE SUPER VIEWGROUP");
final int count = getChildCount();
for (int i = 0; i < count; i++) {
final View child = getChildAt(i);
if (child.getVisibility() != View.GONE) {
//Make or work out measurements for children here (MeasureSpec.make...)
measureChild (child, widthMeasureSpec, heightMeasureSpec);
}
}
}
否则你永远不会真正衡量你的 child 。由您决定如何执行此操作。仅仅因为您的 SuperViewGroup 是线性布局，您的 SuperViewGroup 就负责测量其子级。
关于android - onMeasure 没有在我的自定义 View 组 android 中被调用，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/7749954/