Question

当我单击TextView＆＃34; tvlist＆＃34;时，如何从适配器发送参数？ to Activity＆＃34; SelectAddressActivity＆＃34;，在SelectAddressActivity中，我有两个EditText，我希望用适配器中的参数填充

@Override
public View getView(int position, View convertView, ViewGroup parent) {

    LayoutInflater  inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

    Typeface quicksandRegular = Typeface.createFromAsset(context.getAssets(), "fonts/Roboto-Light.ttf");


    final View row = inflater.inflate(R.layout.list_item, parent, false);

    AddressList al= objects.get(position);

    final TextView tvlist = (TextView)row.findViewById(R.id.id_TextView);
    tvlist.setTypeface(quicksandRegular);
    tvlist.setText(al.get_addresse());


    tvlist.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {

            String content = tvlist.getText().toString();

        }
    });

活动

public class SelectAddressActivity extends Activity {
    ArrayList<AddressList> addressList ; 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_select_address);


        final ListView addressListView = (ListView) findViewById(R.id.addressListView);


        final SelectAddressAdapter adapter = new SelectAddressAdapter(this, android.R.layout.simple_list_item_1, addressList);      
        addressListView.setAdapter(adapter);

}

Answer 1

您必须在行上发送onclick，如下所示

 row.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            AddressList al= objects.get(position);
            Intent intent = new Intent(activity, SelectAddressActivity.class);
            intent.putExtra("id", objects.getyourvariable());

            activity.startActivity(intent);
        }
    });

Answer 2

你可以使用一个接口，在这里我创建了OnClickInAdapter接口，它在适配器类中定义。将以下代码放在适配器中，

    OnClickInAdapter onClickInAdapter;

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    Typeface quicksandRegular = Typeface.createFromAsset(context.getAssets(), "fonts/Roboto-Light.ttf");
    final View row = inflater.inflate(R.layout.list_item, parent, false);
    AddressList al = objects.get(position);
    final TextView tvlist = (TextView) row.findViewById(R.id.id_TextView);
    tvlist.setTypeface(quicksandRegular);
    tvlist.setText(al.get_addresse());
    tvlist.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            String content = tvlist.getText().toString();
            try {
                onClickInAdapter = (OnClickInAdapter) context;
            } catch (ClassCastException e) {
                throw new ClassCastException(contxt.toString()
                        + " must implement OnClickInAdapter");
            }
            onClickInAdapter.onClickInAdapter(content);
        }
    });
}

public interface OnClickInAdapter {
    public void onClickInAdapter(String content);
}

现在活动应该实现这个接口，这样当调用适配器中的OnClick方法时，最终调用onCLickInAdapter（）的activity的方法，将下面的代码放在你的活动中，

public class SelectAddressActivity extends AppCompatActivity implements MyAdapter.OnClickInAdapter{

@Override
public void onClickInAdapter(String content) {
    // you can fill the editText here
}
}

让我知道它是否有效并标记为答案，以便对其他人有用......

Answer 3

make interface;

public interface AsyncResponse {
    void processFinish(Object output);
}

并添加活动

实施AsyncResponse
在Activity中你必须实现processFinish（对象输出）......
，添加成员变量

public AsyncResponse delegate = null;
，添加以下代码：

delegate.processFinish（您的通行证数据）;

如何从适配器向Activity发送参数

3 个答案: