Question

我有一个ListView，带有TextView和Button。我想从我的CustomAdapter发送数据到.class，但我不知道如何。那是我的CustomAdapter。我可以获得我想要的数据的Log或Toast，但我不知道如何在不使用意图的情况下发送。谢谢！：）

public class MyCustomAdapter extends BaseAdapter implements ListAdapter {
    private ArrayList<String> list = new ArrayList<String>();
    private Context context;

public MyCustomAdapter(ArrayList<String> list, Context context) {
    this.list = list;
    this.context = context;
}

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



@Override
public Object getItem(int pos) {
    return list.get(pos);
}

@Override
public long getItemId(int pos) {
    return 0;
    //just return 0 if your list items do not have an Id variable.  ->>   return list.get(pos).getId();
}

@Override
public View getView(final int position, View convertView, ViewGroup parent) {
    View view = convertView;
    if (view == null) {
        LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        view = inflater.inflate(R.layout.listapagos, null);
    }

    //Handle TextView and display string from your list
    final TextView listItemText = (TextView) view.findViewById(R.id.txtPersona);
    listItemText.setText(list.get(position));

    //Handle buttons and add onClickListeners
    Button BtnPago = (Button) view.findViewById(R.id.btn_pago);

    final String textbutton = listItemText.getText().toString();


    BtnPago.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {


            Log.e("BUTTON PRESSED: ",textbutton); 
            notifyDataSetChanged();
        }
    });



    return view;
}
}

Answer 1

以下是使用interface作为回调的示例

public static interface OnClickCallBack {
    public void onClickItem(int index);
}

public class A implements OnClickCallBack {
    MyCustomAdapter myAdapter;
    {
        myAdapter = new MyCustomAdapter (list, context, this); //set this as the callback for myAdapter
    }
    @Override
    public void onClickItem(int index){
        String text = myAdapter.getItem(index);
    }
}

public class MyCustomAdapter extends BaseAdapter implements ListAdapter {
    private OnClickCallBack callback;
    public MyCustomAdapter(ArrayList<String> list, Context context, OnClickCallBack  cb) {
        callback = cb;
    }
    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {
        ....

        BtnPago.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
            callback.onClickItem(position); //invoke callback
            notifyDataSetChanged();
        }
    });  
}

Answer 2

public class MyCustomAdapter extends BaseAdapter implements ListAdapter {
    private ArrayList<String> list = new ArrayList<String>();
    private Context context;

public MyCustomAdapter(ArrayList<String> list, Context context) {
    this.list = list;
    this.context = context;
}

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



@Override
public Object getItem(int pos) {
    return list.get(pos);
}

@Override
public long getItemId(int pos) {
    return pos;
    //just return 0 if your list items do not have an Id variable.  ->>   return list.get(pos).getId();
}

class ViewHolder{

    TextView listItemText;
    Button BtnPago;

    ViewHolder(View view)
    {
        listItemText = (TextView) view.findViewById(R.id.txtPersona);
        BtnPago = (Button) view.findViewById(R.id.btn_pago);
    }
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {

    View row = convertView;
    ViewHolder holder = null;

        if(row == null)
        {
            LayoutInflater inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            row = inflater.inflate(R.layout.listapagos, parent,false);          
            holder = new ViewHolder(row);
            row.setTag(holder);

        }
        else
        {
            holder = (ViewHolder) row.getTag();
        }


    holder.listItemText.setText(list.get(position));

    holder.BtnPago.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            View view=(View) v.getParent();
            TextView info=(TextView)view.findViewById(R.id.txtPersona)

            Intent i=new Intent(context,YourClassName.class);
            i.putExtra("info",info.getText().toString());
            context.startActivity(i);
        }
    });

    return row;
}
}

 public class YourClassName extends Activity {

        @Override
        protected void onCreate(Bundle savedInstanceState) {
            // TODO Auto-generated method stub
            super.onCreate(savedInstanceState);
            setContentView(R.layout.yourlayout);

            String data=getIntent().getStringExtra("info");
            Toast.makeText(this, data, Toast.LENGTH_LONG).show();
        }

    }

并且不要忘记在AndroidManifest.xml中添加活动

<activity
            android:name=".YourClassName"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>

Answer 3

我刚刚解决了它。只需在我的类下面复制适配器，因为它是唯一使用适配器的类。所以，现在我有我班上的数据，我可以按照自己的意愿在数据库中完成所有操作。感谢任何试图帮助我的人。

从CustomAdapter获取数据到Java类

3 个答案: