我正在使用CustomAddapter-ArrayList构建卡片的GridView。 每个单元格都包含2个imageViews(每个单击卡片或卡片的背面只能看到一个)。 对于“翻转”我使用动画。 代码工作正常,唯一不会随动画翻转的单元格是位置为0的单元格(image1将更改为image2,但不包含动画)。 然后我注意到的东西,可能是它的原因, 位置0 getView调用两次每次点击GridView正在调用“位置0”两次
I/System.out: position: 0
I/System.out: position: 0
I/System.out: position: 1
I/System.out: position: 2
I/System.out: position: 3
... // up to 20
我试图找到这个网站上的答案,但他们一直在谈论布局的高度,它没没有帮助。 你能帮我吗?
CustomAdapter:
public class CustomAdapter extends ArrayAdapter<Square> {
final AnimatorSet setRightOut;
final AnimatorSet setLeftIn;
public CustomAdapter(GameActivity context, ArrayList<Square> list) {
super(context, 0, list);
setRightOut = (AnimatorSet) AnimatorInflater.loadAnimator(context,
R.animator.flip_right_out);
setLeftIn = (AnimatorSet) AnimatorInflater.loadAnimator(context,
R.animator.flight_left_in);
}
class ViewHolder {
public ImageView img1,img2; //img1=card's back, img2=card's front (random pic)
}
public View getView (int position, View convertView, ViewGroup parent){
ViewHolder viewHolder;
if (convertView == null)
{
convertView= LayoutInflater.from(getContext()).inflate(R.layout.row, null);
viewHolder=new ViewHolder();
viewHolder.img1 = (ImageView)
convertView.findViewById(R.id.imageView);
viewHolder.img2 = (ImageView) convertView.findViewById(R.id.imageView2);
convertView.setTag(viewHolder);//setting random pic}
else{viewHolder= (ViewHolder) convertView.getTag();}
System.out.println("position: " + position);
viewHolder.img2.setImageResource(getItem(position).id);
if (getItem(position).selected == 1) { //first flip
setRightOut.setTarget(viewHolder.img1);
setLeftIn.setTarget(viewHolder.img2);
setRightOut.start();
setLeftIn.start();
getItem(position).selected = 2; }
else (getItem(position).selected == 2) //card was flipped already- stay flipped
{
viewHolder.img2.setAlpha(1.0f);
viewHolder.img1.setAlpha(0.0f);
}
return convertView;
}}
活动布局:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:orientation="vertical"
android:id="@+id/activity_game"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:background="#0f49b4"
tools:context="com.example.memory.GameActivity">
<GridView
android:layout_width="match_parent"
android:layout_height="410dp"
android:numColumns="4"
android:background="#d5e2e1"
android:id="@+id/gridView"
</GridView>
</LinearLayout>
行XML:
?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal" android:layout_width="100dp"
android:layout_height="80dp">
<ImageView
android:layout_width="100dp"
android:layout_height="80dp"
android:id="@+id/imageView"
android:src="@drawable/q"/>
<ImageView
android:layout_width="100dp"
android:layout_height="80dp"
android:id="@+id/imageView2"
android:alpha="0"
/>
队列在我的情况下不会有帮助。我的卡没有翻转两次,我猜它没有足够的时间翻转第一个电话 - 它已经跳到第二个电话 - 这意味着它会跳转到第二个条件,使卡翻转 - “else(getItem(位置).selected == 2“。我应该继续玩我想的条件,但我觉得它是错误的。如果不在适配器中,我应该在哪里创建动画? – SHAI