android - 当我单击 Recyclerview 中的 ImageView 时，我想打开对话框

Question

当我单击 Recyclerview 中的 ImageView 时，我想打开对话框。

当我显示 Toast 时它正在工作（显示）但是当我想显示 AlertDialog Box 时它不工作（在图像单击应用程序崩溃时）请解决它。这是我的适配器类：-

public class RecyclerAdapter extends RecyclerView.Adapter<RecyclerAdapter.MyViewHolder> {
private ArrayList<GetterSetter> arrayList;
private Context context;

public  RecyclerAdapter(ArrayList<GetterSetter> arrayList, Context context){
    this.arrayList = arrayList;
    this.context = context;
}
@NonNull
@Override
public MyViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
    View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.detail,viewGroup,false);
    return new MyViewHolder(view);
}
@Override
public void onBindViewHolder(@NonNull MyViewHolder myViewHolder, final int i) {
    GetterSetter fp = arrayList.get(i);
    myViewHolder.nametxt.setText(fp.getEmpname());
    myViewHolder.companytxt.setText(fp.getCompanyname());
    myViewHolder.proImg.setImageResource(fp.getEmppic());
    myViewHolder.callImg.setImageResource(fp.callpic);
    myViewHolder.msgimg.setImageResource(fp.msgpic);


    myViewHolder.callImg.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            final Dialog dialog = new Dialog(context);
            dialog.setContentView(R.layout.design);
            dialog.setTitle("Dialog Box");
            TextView text = (TextView) dialog.findViewById(R.id.text);
            text.setText("Android custom dialog example!");
            Button button = (Button) dialog.findViewById(R.id.okbtn);
            button.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    dialog.dismiss();
                }
            });
            dialog.show();
        }
    });
}
@Override
public int getItemCount() {
    return arrayList.size();
}
public class MyViewHolder extends RecyclerView.ViewHolder {
    ImageView proImg,callImg,msgimg;
    TextView nametxt,companytxt;
    public MyViewHolder(@NonNull View itemView) {
        super(itemView);
        itemView.setOnClickListener(null);
        proImg = itemView.findViewById(R.id.imageView);
        callImg = itemView.findViewById(R.id.smallimage1);
        msgimg = itemView.findViewById(R.id.smallimage2);
        nametxt = itemView.findViewById(R.id.name);
        companytxt = itemView.findViewById(R.id.company);
    }
}

}

标签： android

Answer 1

试试这个代码..

将接口变成适配器类以进行单击事件处理..

    OnItemClick onItemClick;

public void setOnItemClick(OnItemClick onItemClick) {
    this.onItemClick = onItemClick;
}

public interface OnItemClick {
    void getPosition(); //pass any things
}

在那之后..

    @Override
public void onBindViewHolder(ItemViewHolder holder, final int position) {
    // below code handle click event on recycler view item.
    String data = mStringList.get(position);
    holder.textView.setText(data);
    holder.imageView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            onItemClick.getPosition();
        }
    });
}

之后将对话框代码变成一种方法并定义为活动..

private void showDialog(){
    final Dialog dialog = new Dialog(this);
    dialog.setContentView(R.layout.design);
    dialog.setTitle("Dialog Box");
    TextView text = (TextView) dialog.findViewById(R.id.text);
    text.setText("Android custom dialog example!");
    Button button = (Button) dialog.findViewById(R.id.okbtn);
    button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            dialog.dismiss();
        }
    });
    dialog.show();
}

在将适配器绑定到 recyclerview 或 listview 之后，这意味着适配器不为空，然后调用下面的代码..

      adpater.setOnItemClick(new RecyclerViewAdpater.OnItemClick() {
        @Override
        public void getPosition() {
            showDialog();
        }
    });