Question

有一个自定义列表视图，它显示文本或图像或两者。现在它显示文本或图像或两者，但问题是只有文本显示仍然可以看到imageView占用的空间。我已将可见性设置为GONE，但它不是隐藏的。

Listview的适配器代码：

public class DescAdapter extends BaseAdapter implements Filterable{

private final listdisplay ds;
private ArrayList<descusers> dusers;
private ArrayList<descusers> orig;

public DescAdapter(listdisplay ds, ArrayList<descusers> dusers) {
    this.ds = ds;
    this.dusers = dusers;
}

@Override
public int getCount() {
    return dusers.size();
}

@Override
public Object getItem(int position) {
    return dusers.get(position);
}

@Override
public long getItemId(int position) {
    return position;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {

    descusers du = dusers.get(position);
    String username = du.loginname;
    String descCrip=du.descCrip;
    String Limage = du.image;

    convertView = LayoutInflater.from(ds).inflate(R.layout.customlist,null);
    TextView uname = (TextView)convertView.findViewById(R.id.username);
    TextView desc = (TextView)convertView.findViewById(R.id.description);

    ImageView iview= (ImageView)convertView.findViewById(R.id.imageList);
    iview.setVisibility(View.GONE);

    uname.setText(username);
    desc.setText(descCrip);

    if(!Limage.isEmpty()){
        Glide.with(convertView.getContext()).load(Limage)
                .diskCacheStrategy(DiskCacheStrategy.ALL).fitCenter().centerCrop().into(iview);
        iview.setVisibility(View.VISIBLE);

    }


    return convertView;
}

}

自定义XML：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="226dp"
    android:orientation="vertical"
    android:background="@drawable/test"
    android:layout_gravity="center_horizontal|top">

<TextView
    android:id="@+id/username"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="username"
    android:textColor="#ff6aa9ff"
    android:textSize="20sp"
    android:textStyle="bold"
    android:layout_marginLeft="45dp"/>

<TextView
    android:id="@+id/description"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Suggest"
    android:textColor="#ff06010b"
    android:textSize="18sp"
    android:layout_marginLeft="45dp"/>

<ImageView
    android:layout_width="275dp"
    android:layout_height="165dp"
    android:id="@+id/imageList"
    android:layout_marginTop="6dp"
    android:layout_marginLeft="45dp"/>

</LinearLayout>

我在上面的代码中做了什么错误？

答案：问题在于线性布局高度设置为android：layout_height =＆＃34; 226dp＆＃34; ，改为Wrap-Content解决了这个问题。

Answer 1

在适配器的getView方法中尝试此代码：

@Override
public View getView(int position, View convertView, ViewGroup parent) {

    descusers du = dusers.get(position);
    String username = du.loginname;
    String descCrip=du.descCrip;
    String Limage = du.image;
   ViewHolder viewHolder = null;
    if(convertView==null){
    viewHolder = new ViewHolder();
    convertView = LayoutInflater.from(ds).inflate(R.layout.customlist,null);
    viewHolder.uname = (TextView)convertView.findViewById(R.id.username);
    viewHolder.desc = (TextView)convertView.findViewById(R.id.description);

    viewHolder.iview= (ImageView)convertView.findViewById(R.id.imageList);
    convertView.setTag(viewHolder);
}else{
    viewHolder = (ViewHolder) convertView.getTag();
}

    viewHolder.uname.setText(username);
    viewHolder.desc.setText(descCrip);

    if(!Limage.isEmpty()){
        Glide.with(convertView.getContext()).load(Limage)
                .diskCacheStrategy(DiskCacheStrategy.ALL).fitCenter().centerCrop().into( viewHolder.iview);
        viewHolder.iview.setVisibility(View.VISIBLE);

    }else{
      viewHolder.iview.setVisibility(View.GONE);
    }


    return convertView;
}

并使用此类作为持有人：

class ViewHolder {
    TextView uname;
    TextView desc;
    ImageView iview;


}

imageview没有隐藏在自定义Listview上

1 个答案: