ListView 内的 ImageButton onclick 列表器不起作用。应用点击后崩溃

Posted 2023-04-19

【中文标题】ListView 内的 ImageButton onclick 列表器不起作用。应用点击后崩溃

【英文标题】：ImageButton onclick listner inside ListView is not working. The App crashes after click

【发布时间】：2021-09-28 07:12:06

【问题描述】：

我编写了以下代码从自定义 listView 内部进行调用，但每当我按下 Imagebutton 时，应用程序就会崩溃。我尝试了不同的文章和教程，但无法实现。有人可以看到我的代码并建议如何操作吗？

模型列表视图的 XML

    <RelativeLayout
    android:layout_
    android:layout_
    android:background="#EADEF1">
<de.hdodenhof.circleimageview.CircleImageView
    android:id="@+id/photo"
    android:layout_
    android:layout_
    android:layout_margin="5dp"
    android:layout_gravity="center"
    android:src="@drawable/logobsca">
</de.hdodenhof.circleimageview.CircleImageView>

<TextView
    android:id="@+id/textName"
    android:layout_
    android:layout_
    android:text="Name"
    android:layout_toRightOf="@id/photo"
    android:textSize="14sp"
    android:textColor="#4527A0"
    android:textStyle="bold"/>
<TextView
    android:id="@+id/textDesignation"
    android:layout_
    android:layout_
    android:layout_below="@id/textName"
    android:layout_toRightOf="@id/photo"
    android:text="Designation"
    android:textSize="12sp"
    android:textColor="#1F2020"
    android:textStyle="normal"/>
  <TextView
    android:id="@+id/textPhone"
    android:layout_below="@id/textDesignation"
    android:layout_toRightOf="@id/photo"
    android:layout_
    android:layout_
    android:text="Phone"
    android:clickable="true"
    android:textColor="#1F2020"
    android:textSize="12sp"
    android:textStyle="normal" />
    

     <ImageButton
         android:id="@+id/callButton"
         android:layout_
         android:layout_
         android:layout_alignParentTop="true"
         android:clickable="false"
         android:layout_alignParentEnd="true"
         android:layout_marginTop="9dp"
         android:layout_marginEnd="13dp"
         android:background="@drawable/roundcall"
         android:src="@android:drawable/ic_menu_call" />
</RelativeLayout>

模型类活动

    ```public class ListMobileModel extends AppCompatActivity 
String Name;
String Designation;
String Phone;
ImageButton CallButton;
int Photo;

public String getName() 
    return Name;


public void setName(String name) 
    Name = name;


public String getDesignation() 
    return Designation;


public void setDesignation(String designation) 
    Designation = designation;


public String getPhone() 
    return Phone;


public void setPhone(String phone) 
    Phone = phone;


public int getPhoto() 
    return Photo;


public void setPhoto(int photo) 
    Photo = photo;


public ListMobileModel(String name, String designation, String phone, int photo) 
    Name = name;
    Designation = designation;
    Phone = phone;
    Photo = photo;

```

ListView 适配器

    public class ListViewAdapter extends BaseAdapter 

Activity context;
LayoutInflater inflater;
List<ListMobileModel> mobilelist;
ArrayList<ListMobileModel> arrayList;

public ListViewAdapter( Activity context, List<ListMobileModel> mobilelist) 

    context = context;
    this.mobilelist=mobilelist;
    inflater=LayoutInflater.from(context);
    this.arrayList=new ArrayList<ListMobileModel>();
    this.arrayList.addAll(mobilelist);


public class ViewHolder
    TextView nameTV, designationTV, mobileTV;
    ImageView photoTV;
    ImageButton callButton;



@Override
public int getCount() 
    return mobilelist.size();


@Override
public Object getItem(int position) 
    return mobilelist.get(position);


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


public View getView(int position, View view, ViewGroup parent)
    ViewHolder holder;
    if (view==null)
        holder=new ViewHolder();
        view=inflater.inflate(R.layout.activity_listmobile_model, null);


        // locate the views in activity_listmobile_model.xml)

        holder.nameTV=view.findViewById(R.id.textName);
        holder.designationTV=view.findViewById(R.id.textDesignation);
        holder.mobileTV=view.findViewById(R.id.textPhone);
        holder.photoTV=view.findViewById(R.id.photo);
        holder.callButton=view.findViewById(R.id.callButton);

        view.setTag(holder);
    
        else
            holder = (ViewHolder) view.getTag();
    
        //set the results into Textview
        holder.nameTV.setText(mobilelist.get(position).getName());
        holder.designationTV.setText(mobilelist.get(position).getDesignation());
        holder.mobileTV.setText(mobilelist.get(position).getPhone());
        holder.photoTV.setImageResource(mobilelist.get(position).getPhoto());

        ImageButton callButton;
        callButton=view.findViewById(R.id.callButton);



        callButton.setOnClickListener(new View.OnClickListener() 
            @Override
            public void onClick(View v) 
                String cellno=mobilelist.get(position).getPhone();
                Intent callIntent =new Intent(Intent.ACTION_CALL);
                callIntent.setData(Uri.parse("tel:" + cellno));
                if(ActivityCompat.checkSelfPermission(context, Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED)
                    return;
                
                context.startActivity(callIntent);
            
        );
        return view;

//Filter
public void filter(String charText)
    charText=charText.toLowerCase(Locale.getDefault());
    mobilelist.clear();
    if(charText.length()==0)
        mobilelist.addAll(arrayList);
    
    else
        for(ListMobileModel row:arrayList)
            if (row.getName().toLowerCase(Locale.getDefault()).contains(charText)|| (row.getDesignation().toLowerCase(Locale.getDefault()).contains(charText)))
                mobilelist.add(row);
            

        
    
    notifyDataSetChanged();

```

列表视图活动

    ```public class ListViewAdapter extends BaseAdapter 

Activity context;
LayoutInflater inflater;
List<ListMobileModel> mobilelist;
ArrayList<ListMobileModel> arrayList;

public ListViewAdapter( Activity context, List<ListMobileModel> mobilelist) 

    context = context;
    this.mobilelist=mobilelist;
    inflater=LayoutInflater.from(context);
    this.arrayList=new ArrayList<ListMobileModel>();
    this.arrayList.addAll(mobilelist);


public class ViewHolder
    TextView nameTV, designationTV, mobileTV;
    ImageView photoTV;
    ImageButton callButton;



@Override
public int getCount() 
    return mobilelist.size();


@Override
public Object getItem(int position) 
    return mobilelist.get(position);


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


public View getView(int position, View view, ViewGroup parent)
    ViewHolder holder;
    if (view==null)
        holder=new ViewHolder();
        view=inflater.inflate(R.layout.activity_listmobile_model, null);


        // locate the views in activity_listmobile_model.xml)

        holder.nameTV=view.findViewById(R.id.textName);
        holder.designationTV=view.findViewById(R.id.textDesignation);
        holder.mobileTV=view.findViewById(R.id.textPhone);
        holder.photoTV=view.findViewById(R.id.photo);
        holder.callButton=view.findViewById(R.id.callButton);

        view.setTag(holder);
    
        else
            holder = (ViewHolder) view.getTag();
    
        //set the results into Textview
        holder.nameTV.setText(mobilelist.get(position).getName());
        holder.designationTV.setText(mobilelist.get(position).getDesignation());
        holder.mobileTV.setText(mobilelist.get(position).getPhone());
        holder.photoTV.setImageResource(mobilelist.get(position).getPhoto());

        ImageButton callButton;
        callButton=view.findViewById(R.id.callButton);



        callButton.setOnClickListener(new View.OnClickListener() 
            @Override
            public void onClick(View v) 
                String cellno=mobilelist.get(position).getPhone();
                Intent callIntent =new Intent(Intent.ACTION_CALL);
                callIntent.setData(Uri.parse("tel:" + cellno));
                if(ActivityCompat.checkSelfPermission(context, Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED)
                    return;
                
                context.startActivity(callIntent);
            
        );
        return view;

//Filter
public void filter(String charText)
    charText=charText.toLowerCase(Locale.getDefault());
    mobilelist.clear();
    if(charText.length()==0)
        mobilelist.addAll(arrayList);
    
    else
        for(ListMobileModel row:arrayList)
            if (row.getName().toLowerCase(Locale.getDefault()).contains(charText)|| (row.getDesignation().toLowerCase(Locale.getDefault()).contains(charText)))
                mobilelist.add(row);
            

        
    
    notifyDataSetChanged();

``` enter image description here``

【参考方案1】：

使用RecyclerView 代替ListView

RecyclerView的Adapter和ListView的Adapter也是一样的。

Click在这里了解更多详情。

【讨论】：

感谢哈桑先生的意见。我的问题是 ImageButton 单击而不是 ItemClick 侦听器。我的 ItemClick 监听器工作正常。