我在另一个recyclerview中有一个recyclerview。我想制作内部回收视频的高度" warp_content"。
我发现可以使用下面提到的新版本的recyclerview。
'com.android.support:recyclerview-v7:23.2.0'
但问题是,通过设置height = wrap_content,我只能看到第一项。
任何帮助都会很棒。
答案 0 :(得分:8)
因为我使用RecyclerView
这不起作用,请参阅:
https://code.google.com/p/android/issues/detail?id=74772
和
嵌套的Recycler视图高度不会包含它的内容
在这两个页面上,人们建议延长LinearLayoutManager
并覆盖onMeasure()
RecyclerView默认没有wrap_content。您必须将RecyclerView与wrap_content布局管理器一起使用,例如WrapLinearLayoutManager,例如CustomLinearLayoutManager。
CustomLinearLayoutManager.java
public class CustomLinearLayoutManager extends LinearLayoutManager {
private static final String TAG = CustomLinearLayoutManager.class.getSimpleName();
public CustomLinearLayoutManager(Context context) {
super(context);
}
public CustomLinearLayoutManager(Context context, int orientation, boolean reverseLayout) {
super(context, orientation, reverseLayout);
}
private int[] mMeasuredDimension = new int[2];
@Override
public void onMeasure(RecyclerView.Recycler recycler, RecyclerView.State state, int widthSpec, int heightSpec) {
final int widthMode = View.MeasureSpec.getMode(widthSpec);
final int heightMode = View.MeasureSpec.getMode(heightSpec);
final int widthSize = View.MeasureSpec.getSize(widthSpec);
final int heightSize = View.MeasureSpec.getSize(heightSpec);
int width = 0;
int height = 0;
for (int i = 0; i < getItemCount(); i++) {
measureScrapChild(recycler, i, View.MeasureSpec.makeMeasureSpec(i, View.MeasureSpec.UNSPECIFIED),
View.MeasureSpec.makeMeasureSpec(i, View.MeasureSpec.UNSPECIFIED),
mMeasuredDimension);
if (getOrientation() == HORIZONTAL) {
width = width + mMeasuredDimension[0];
if (i == 0) {
height = mMeasuredDimension[1];
}
} else {
height = height + mMeasuredDimension[1];
if (i == 0) {
width = mMeasuredDimension[0];
}
}
}
switch (widthMode) {
case View.MeasureSpec.EXACTLY:
width = widthSize;
case View.MeasureSpec.AT_MOST:
case View.MeasureSpec.UNSPECIFIED:
}
switch (heightMode) {
case View.MeasureSpec.EXACTLY:
height = heightSize;
case View.MeasureSpec.AT_MOST:
case View.MeasureSpec.UNSPECIFIED:
}
setMeasuredDimension(width, height);
}
private void measureScrapChild(RecyclerView.Recycler recycler, int position, int widthSpec,
int heightSpec, int[] measuredDimension) {
try {
View view = recycler.getViewForPosition(0);//fix 动态添加时报IndexOutOfBoundsException
if (view != null) {
RecyclerView.LayoutParams p = (RecyclerView.LayoutParams) view.getLayoutParams();
int childWidthSpec = ViewGroup.getChildMeasureSpec(widthSpec,
getPaddingLeft() + getPaddingRight(), p.width);
int childHeightSpec = ViewGroup.getChildMeasureSpec(heightSpec,
getPaddingTop() + getPaddingBottom(), p.height);
view.measure(childWidthSpec, childHeightSpec);
measuredDimension[0] = view.getMeasuredWidth() + p.leftMargin + p.rightMargin;
measuredDimension[1] = view.getMeasuredHeight() + p.bottomMargin + p.topMargin;
recycler.recycleView(view);
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
答案 1 :(得分:1)
设置recyclerview项目对我有用。
有意添加外部包装器相对布局以解决问题layout_height="wrap_content"
没有
占用通过适配器添加到其中的所有元素的高度。结果被删除了
最初加载时在设备视口外部的项目。
使用“RelativeLayout”包装“RecyclerView”可以解决Marshmallow设备上的问题。
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:descendantFocusability="blocksDescendants">
<android.support.v7.widget.RecyclerView
android:id="@+id/rv_test"
android:layout_width="match_parent"
android:layout_height="wrap_content"
tools:listitem="@layout/test_item"></android.support.v7.widget.RecyclerView>
</RelativeLayout>