android - 卡片视图中列表视图的高度在滚动后发生变化
问题描述
我正在使用包含列表视图的卡片视图。列表视图项目计数应根据用户的输入进行更改，因此我将列表视图高度设置为 wrap_content。在用户滚动之前一切正常，但在滚动列表视图或卡片视图的高度后发生变化。
这是我的 xml 和卡片视图适配器代码块；
卡片视图适配器
public class RoundItemAdapter extends RecyclerView.Adapter<RoundItemAdapter.RoundItemViewHolder> {
private ArrayList<Round> mRounds;
private Context context;
public RoundItemAdapter(Context context, ArrayList<Round> rounds){
mRounds = rounds;
this.context = context;
}
@NonNull
@Override
public RoundItemViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.round_item, parent, false);
RoundItemViewHolder roundItemViewHolder = new RoundItemViewHolder(view);
return roundItemViewHolder;
}
@Override
public void onBindViewHolder(@NonNull RoundItemViewHolder roundItemViewHolder, int position) {
Round currentItem = mRounds.get(position);
roundItemViewHolder.mTextViewTitle.setText("Round: " + currentItem.number);
MatchItemAdapter matchItemAdapter = new MatchItemAdapter(context, R.layout.match_item, currentItem.matches);
roundItemViewHolder.mListViewRound.setAdapter(matchItemAdapter);
matchItemAdapter.notifyDataSetChanged();
}
@Override
public int getItemCount() {
return mRounds.size();
}
public static class RoundItemViewHolder extends RecyclerView.ViewHolder{
public TextView mTextViewTitle;
public ListView mListViewRound;
public RoundItemViewHolder(View itemView){
super(itemView);
mTextViewTitle = itemView.findViewById(R.id.textView_rounds_title);
mListViewRound = itemView.findViewById(R.id.listView_rounds);
}
}}
用于卡片视图的 XML
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
app:cardCornerRadius="6dp"
android:layout_margin="4dp">
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="@+id/textView_rounds_title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="@string/title"
android:textSize="16sp"
android:background="@android:color/darker_gray"
android:textColor="@android:color/white"
android:paddingTop="4dp"
android:paddingBottom="4dp"
android:paddingStart="4dp"
android:paddingEnd="4dp"
android:textStyle="bold"/>
<ListView
android:id="@+id/listView_rounds"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:scrollbars="none" />
</LinearLayout>
匹配项.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="@+id/textView_player_home_name"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:layout_marginBottom="8dp"
android:paddingLeft="8dp"
android:paddingTop="8dp"
android:paddingRight="8dp"
android:paddingBottom="8dp"
android:text="@string/empty"
android:textAlignment="viewEnd"
android:textSize="16sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="@+id/textView_vs"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="@+id/textView_player_away_name"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginStart="8dp"
android:layout_marginEnd="8dp"
android:drawableEnd="@drawable/ic_navigate_next_gray_24dp"
android:drawableRight="@drawable/ic_navigate_next_gray_24dp"
android:paddingLeft="8dp"
android:paddingTop="8dp"
android:paddingRight="8dp"
android:paddingBottom="8dp"
android:text="@string/empty"
android:textAlignment="viewStart"
android:textSize="16sp"
app:layout_constraintBottom_toBottomOf="@+id/textView_player_home_name"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="@+id/textView_vs"
app:layout_constraintTop_toTopOf="@+id/textView_player_home_name" />
<TextView
android:id="@+id/textView_vs"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_marginStart="8dp"
android:layout_marginEnd="8dp"
android:paddingLeft="8dp"
android:paddingTop="8dp"
android:paddingRight="8dp"
android:paddingBottom="8dp"
android:text="vs"
android:textAlignment="center"
android:textSize="16sp"
app:layout_constraintBottom_toBottomOf="@+id/textView_player_home_name"
app:layout_constraintEnd_toStartOf="@+id/textView_player_away_name"
app:layout_constraintStart_toEndOf="@+id/textView_player_home_name"
app:layout_constraintTop_toTopOf="@+id/textView_player_home_name" />
解决方案
尝试改变 the和from to的layout_height约束。CardViewConstraintLayoutmatch_parentwrap_content
用于卡片视图的 XML：
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
xmlns:app="http://schemas.android.com/apk/res-auto"
app:cardCornerRadius="6dp"
android:layout_margin="4dp">
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="@+id/textView_rounds_title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="@string/title"
android:textSize="16sp"
android:background="@android:color/darker_gray"
android:textColor="@android:color/white"
android:paddingTop="4dp"
android:paddingBottom="4dp"
android:paddingStart="4dp"
android:paddingEnd="4dp"
android:textStyle="bold"/>
<ListView
android:id="@+id/listView_rounds"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:scrollbars="none" />
</LinearLayout>
匹配项.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="@+id/textView_player_home_name"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:layout_marginBottom="8dp"
android:paddingLeft="8dp"
android:paddingTop="8dp"
android:paddingRight="8dp"
android:paddingBottom="8dp"
android:text="@string/empty"
android:textAlignment="viewEnd"
android:textSize="16sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="@+id/textView_vs"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="@+id/textView_player_away_name"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginStart="8dp"
android:layout_marginEnd="8dp"
android:drawableEnd="@drawable/ic_navigate_next_gray_24dp"
android:drawableRight="@drawable/ic_navigate_next_gray_24dp"
android:paddingLeft="8dp"
android:paddingTop="8dp"
android:paddingRight="8dp"
android:paddingBottom="8dp"
android:text="@string/empty"
android:textAlignment="viewStart"
android:textSize="16sp"
app:layout_constraintBottom_toBottomOf="@+id/textView_player_home_name"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="@+id/textView_vs"
app:layout_constraintTop_toTopOf="@+id/textView_player_home_name" />
<TextView
android:id="@+id/textView_vs"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_marginStart="8dp"
android:layout_marginEnd="8dp"
android:paddingLeft="8dp"
android:paddingTop="8dp"
android:paddingRight="8dp"
android:paddingBottom="8dp"
android:text="vs"
android:textAlignment="center"
android:textSize="16sp"
app:layout_constraintBottom_toBottomOf="@+id/textView_player_home_name"
app:layout_constraintEnd_toStartOf="@+id/textView_player_away_name"
app:layout_constraintStart_toEndOf="@+id/textView_player_home_name"
app:layout_constraintTop_toTopOf="@+id/textView_player_home_name" />
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