我想在底部导航活动下单击列表视图项时更改片段
但我不知道如何编写 OnClickListener
谁能提供一些提示或告诉我这个程序有什么问题?
这是程序
感谢您花时间观看我的节目
非常感谢
package com.example.campus.ui.campus;
import android.app.Activity;
import android.app.Fragment;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import androidx.appcompat.app.AppCompatActivity;
import com.example.c.MainActivity;
import com.example.c.R;
import com.example.c.database.campus.CampusData;
import com.example.c.ui.campusInformation.CampusInformationActivity;
import com.example.c.ui.campusInformation.CampusInformationFragment;
import java.util.ArrayList;
import java.util.List;
public class CampusListLayoutAdapter extends BaseAdapter {
private LayoutInflater layoutInflater;
private List<CampusData> campusList = new ArrayList<CampusData>();
private int resourceViewID;
private Context context;
private Context mContext;
static class ViewHolder{
LinearLayout llCampusCard;
TextView tvCampusName;
TextView tvCampusAddress;
ImageView ivCampusImage;
}
public CampusListLayoutAdapter(Context c, List<CampusData> campusList){
context = c;
layoutInflater = LayoutInflater.from(c);
this.campusList = campusList;
}
@Override
public int getCount() {
return campusList.size();
}
@Override
public Object getItem(int i) {
return i;
}
@Override
public long getItemId(int i) {
return i;
}
@Override
public View getView(int i, View view, ViewGroup viewGroup) {
mContext = viewGroup.getContext();
ViewHolder holder = new ViewHolder();
view = layoutInflater.inflate(R.layout.listview_campus, null);
if(view != null){
holder.tvCampusName = view.findViewById(R.id.tvCampusName);
holder.tvCampusAddress = view.findViewById(R.id.tvCampusAddress);
holder.ivCampusImage = view.findViewById(R.id.ivCampusImage);
holder.tvCampusName.setText(campusList.get(i).name);
holder.tvCampusAddress.setText(campusList.get(i).address);
String image = campusList.get(i).image;
resourceViewID = context.getResources().getIdentifier(image, "drawable", context.getPackageName());
holder.ivCampusImage.setImageResource(resourceViewID);
view.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
}
});
return view;
}else {
return null;
}
}
}
答案 0 :(得分:1)
首先,在您的适配器类中创建一个接口。
<ListView x:Name="listViewControl" ScrollViewer.HorizontalScrollBarVisibility="Disabled" ...
将适配器的构造函数更改为
public interface Callbacks {
void onItemClick(YourObject object, int position); // arguments as per the requirement
}
现在在您的 onClick() 中使用..
Callbacks callback;
public CampusListLayoutAdapter(Context c, List<CampusData> campusList, Callbacks callback){
.....
this.callback = callback;
}
然后在您的活动中传递匿名或简单地实现接口。
callback.onItemClick(yourClickedItem, position)