CardView 在移除高度后占据 space 高度

Question

当我降低 CardView 的高度时，它需要 space 的高度
这是正常的图片:-

点击时是这样的：-

这是再次单击时我尝试将其高度设置回正常的位置：-

点击的项目是 (1,2)

这是我的 cardView 代码：-

  <android.support.v7.widget.CardView
    xmlns:card_view="http://schemas.android.com/apk/res-auto"
    android:id="@+id/card_view_categories"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:layout_marginLeft="5dp"
    android:layout_marginTop="5dp"
    android:layout_marginRight="5dp"
    android:layout_marginBottom="2dp"
    card_view:cardBackgroundColor="#fffff7"
    card_view:cardCornerRadius="0dp"
    card_view:cardUseCompatPadding="true"

OnClick 卡片视图：-

@Override
                public void onClick(View arg0) {
                    if (i % 2 == 1) {
                        mAddIcon.setVisibility(View.VISIBLE);
                        Animation anim = AnimationUtils.loadAnimation(context,
                                R.drawable.settrans);
                        mAddIcon.startAnimation(anim);
                        mAddIcon.setImageResource(R.drawable.ic_done_black_24dp);
                        i++;
                        Categories cat = new Categories();
                        cat.mCategory = mCategory.getText().toString();
                        mSelectedList.add(cat);
                        Random rnd = new Random(); 
                        String[] color= {"#F44336","#FF4081","#9C27B0","#7C4DFF","#009688","#00BCD4","#8BC34A","#CDDC39","#FF5722","#607D8B"};
                        int index = rnd.nextInt(color.length-1);
                        String item = color[index];
                        //int color = Color.argb(255, rnd.nextInt(256), rnd.nextInt(256), rnd.nextInt(256));   
                    //  card.setBackgroundColor(color);
                    //  card.setBackgroundColor(Color.parseColor(item));
                    //  mCategory.setTextColor(Color.parseColor("#ffffff"));
                        card.setElevation(50);
                    } else {
                        Animation anim = AnimationUtils.loadAnimation(context,
                                R.drawable.settrans);
                        mAddIcon.startAnimation(anim);
                        mAddIcon.setImageResource(R.drawable.ic_add_black_24dp);
                        i++;
                        Categories cat = new Categories();
                        cat.mCategory = mCategory.getText().toString();
                        mSelectedList.remove(cat);
                        mCategory.setTextColor(Color.parseColor("#000000"));
                    card.setBackgroundColor(Color.parseColor("#fffff7"));
                        card.setElevation(10);
                    }
                }
            });

Answer 1

设置 elevation 或 translationZ View 而不是 CardView 将对您有所帮助。

public boolean press=false;
cardviewrow.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
          if(!press){
              v.setTranslationZ(50); 
              //or you can use 
              v.setElevation(50); 
              press=false;
          }else{
              v.setTranslationZ(0);
              //or you can use 
              v.setElevation(0);
              press=true;
          }
        }
});

如果您不想收到有关最低 Api 级别的警告，请使用此：

if(isLolipop()) v.setTranslationZ(50); 

public static boolean isLolipop(){
  return  Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP;
}

CardView 在移除高度后占据 space 高度

CardView takes space of elevation after elevation removed

android

android-layout

android-cardview