Question

上次我设置单选按钮的特定行的单选按钮检查有问题因为滚动上/下后的listview回收视图我用set tag解决了它并获取标签到单选按钮，但这次我我尝试这个线性布局有2个按钮来设置可见性，但最终崩溃。原因是我不能将整数转换为线性布局，所以请帮助我如何使用线性布局。

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    ViewHolder holder;
    if (convertView == null) {
        holder = new ViewHolder();
        convertView = View.inflate(mContext, R.layout.list_item_agents_feed, null);
        holder.agentBhkTv = (TextView) convertView.findViewById(R.id.feedBhkTv);
        holder.chatLinearLayout = (LinearLayout) convertView.findViewById(R.id.chatLayout);
        convertView.setTag(holder);
    } else {
        holder = (ViewHolder) convertView.getTag();
    }
    final AgentsFeedData data = agentsFeedDataList.get(position);
    holder.agentChatBtn.setTag(position);
    if (data.getUsername() != null) {
        if (data.getUsername().equals(uname)) {
            holder.chatLinearLayout = (LinearLayout) holder.agentBhkTv.getTag();
            holder.chatLinearLayout.setVisibility(View.GONE);
        }
    }

崩溃日志

08-03 22:09:58.603  28409-28409/in.pm.android E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.lang.ClassCastException: java.lang.Integer cannot be cast to android.widget.LinearLayout
        at in.pm.android.adapter.AgentsFeedAdapter.getView(AgentsFeedAdapter.java:103)
        at android.widget.AbsListView.obtainView(AbsListView.java:2627)
        at android.widget.ListView.makeAndAddView(ListView.java:1852)
        at android.widget.ListView.fillDown(ListView.java:682)
        at android.widget.ListView.fillFromTop(ListView.java:748)
        at android.widget.ListView.layoutChildren(ListView.java:1653)
        at android.widget.AbsListView.onLayout(AbsListView.java:2447)
        at android.view.View.layout(View.java:15204)
        at android.view.ViewGroup.layout(ViewGroup.java:4793)
        at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1677)
        at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1531)
        at android.widget.LinearLayout.onLayout(LinearLayout.java:1440)
        at android.view.View.layout(View.java:15204)
        at android.view.ViewGroup.layout(ViewGroup.java:4793)
        at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1076)
        at android.view.View.layout(View.java:15204)
        at android.view.ViewGroup.layout(ViewGroup.java:4793)
        at android.widget.FrameLayout.onLayout(FrameLayout.java:448)
        at android.view.View.layout(View.java:15204)
        at android.view.ViewGroup.layout(ViewGroup.java:4793)
        at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1677)
        at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1531)
        at android.widget.LinearLayout.onLayout(LinearLayout.java:1440)

崩溃的行是

holder.chatLinearLayout = (LinearLayout) holder.agentBhkTv.getTag();

Answer 1

根本不需要holder.chatLinearLayout = (LinearLayout) holder.agentChatBtn.getTag();行。如果在convertView == null情况下 - >你把它设置在那里，上面几行。如果在else分支上，则在您首先创建视图时已经设置了holder.chatLinearLayout。只需删除整行。

Answer 2

在查看其他数据如何完美显示之后找到答案。 K在研究了我设置为适配器的数据类型后，即使用带有getter和setter的Object类的arraylist然后我做了这个，希望这可以帮助其他人面对同样的问题。

public class AgentsFeedData {
    private String bhk;
    private boolean visible = true;

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getBhk() {
        return bhk;
    }

    public void setBhk(String bhk) {
        this.bhk = bhk;
    }

    public boolean isVisible() {
        return visibile;
    }

    public void setVisible(boolean visible) {
        this.visible = visible;
    }
}

适配器类中代码的使用

public class AgentsFeedAdapter extends BaseAdapter {
    private List<AgentsFeedData> agentsFeedDataList = new ArrayList<>();
    private Context mContext;

public AgentsFeedAdapter(Context mContext, List<AgentsFeedData> agentsFeedDataList) {
    this.mContext = mContext;
    this.agentsFeedDataList = agentsFeedDataList;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    ViewHolder holder;
    if (convertView == null) {
        holder = new ViewHolder();
        convertView = View.inflate(mContext, R.layout.list_item_agents_feed, null);
        holder.agentBhkTv = (TextView) convertView.findViewById(R.id.feedBhkTv);
        holder.agentChatBtn = (Button) convertView.findViewById(R.id.agentChatBtn);
        holder.agentConnectBtn = (Button) convertView.findViewById(R.id.agentConnectBtn);
        holder.chatLinearLayout = (LinearLayout) convertView.findViewById(R.id.chatLayout);
        convertView.setTag(holder);
    } else {
        holder = (ViewHolder) convertView.getTag();
    }
    final AgentsFeedData data = agentsFeedDataList.get(position);
    String uname = mContext.getSharedPreferences(Constansts.PREFERENCE_NAME, 0)
            .getString(Constansts.USER_ID, "");
    if (data.getUsername() != null) {
        if (data.getUsername().equals(uname)) {
            data.setVisible(false);
        }
    }

    if (!data.isVisible()){
        holder.chatLinearLayout.setVisibility(View.GONE);
    } else {
        holder.chatLinearLayout.setVisibility(View.VISIBLE);
    }
    return convertView;
}

public void swapItems(List<AgentsFeedData> agentsFeedDataList) {
    this.agentsFeedDataList = agentsFeedDataList;
    notifyDataSetChanged();
}

private class ViewHolder {
    TextView agentBhkTv;
    Button agentChatBtn;
    Button agentConnectBtn;
    LinearLayout chatLinearLayout;

    }
}

Android线性布局在listview自定义适配器中设置可见性

2 个答案: