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如何使用自定义行从ArrayAdapter启动onClick方法中的活动

onclicklistener android-arrayadapter android java

fxvdh · 技术社区 · 8 年前

ArrayAdapter 有一个 ListView OnClickListener 到每行。我在这里面临两个主要问题:

指定的活动( InvoiceActivity )单击时不会启动。
当我只输出日志消息(并评论意图和开始触觉部分)时,点击的反应时间非常慢。

目前,ListView中只有3行虚拟数据。

public class InvoiceListAdapter extends ArrayAdapter<InvoiceShort> {

public InvoiceListAdapter(Context context, ArrayList<InvoiceShort> invoices) {
    super(context, R.layout.list_elem, invoices);
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    final InvoiceShort invoice = getItem(position);
    if (convertView == null) {
        convertView = LayoutInflater.from(getContext()).inflate(R.layout.list_elem, parent, false);
        convertView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(final View parent) {

                Log.d("item click", "invoice id: " + invoice.getId());
                Intent intent = new Intent(getContext(), InvoiceActivity.class);
                intent.putExtra("id", invoice.getId());
                getContext().startActivity(intent);
            }
        });
    }

    // Lookup view for data population
    TextView date = (TextView) convertView.findViewById(R.id.textDate);
    TextView total = (TextView) convertView.findViewById(R.id.textTotal);
    CheckBox paid = (CheckBox) convertView.findViewById(R.id.checkBoxPaid);

    // populate data
    DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
    date.setText(formatter.format(invoice.getDate()));
    total.setText("â¬ " + new Long(invoice.getTotal()).toString());
    paid.setChecked(invoice.isPaid());

    return convertView;
    }
}

编辑:这是一行的xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="50dp"
    android:layout_centerHorizontal="false"
    android:orientation="horizontal">

    <CheckBox
        android:id="@+id/checkBoxPaid"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:checked="true"
        android:elevation="0dp"
        android:inputType="none" />

    <EditText
        android:id="@+id/textDate"
        android:layout_width="0dp"
        android:layout_height="match_parent"
        android:layout_weight="5"
        android:background="@null"
        android:ems="10"
        android:focusable="false"
        android:inputType="none"
        android:text="2017-12-30" />

    <EditText
        android:id="@+id/textTotal"
        android:layout_width="0dp"
        android:layout_height="match_parent"
        android:layout_weight="2"
        android:background="@null"
        android:ems="10"
        android:focusable="false"
        android:inputType="none"
        android:text="10â¬"
        android:textAlignment="viewStart" />

</LinearLayout>

5 回复 | 直到 8 年前

user6457240 user6457240 8 年前

我已经找到了解决方案,这里的问题是,您的xml中有edittext,但您将其作为Textview获取,您可以在list\u elem布局中将Textview更改为edittext,您的单击侦听器将工作。否则,您可以在customAdapter中将textview更改为edittext,并为edittext设置双击侦听器,如下所示

date.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                View parent = (View) v.getParent();
                parent.performClick();
            }
        });
        total.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                View parent = (View) v.getParent();
                parent.performClick();
            }
        });

Sharath kumar 8 年前

使用视图上下文启动活动

Intent intent = new Intent(convertView.getContext(), InvoiceActivity.class);
intent.putExtra("id", invoice.getId());
convertView.getContext().startActivity(intent);

Ghulam Moinul Quadir 8 年前

Nikhil Jadhav 8 年前

尝试如下修改构造函数:-

Context mContext;
    public InvoiceListAdapter(Context context, ArrayList<InvoiceShort>    
     invoices) {
    super(context, R.layout.list_elem, invoices);
    mContext = context;
   }

本部分:-

  @Override
        public void onClick(View parent) {

            Log.d("item click", "invoice id: " + invoice.getId());
            Intent intent = new Intent(getContext(), InvoiceActivity.class);
            intent.putExtra("id", invoice.getId());
            getContext().startActivity(intent);
        }

       convertView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View parent) {

            Log.d("item click", "invoice id: " + invoice.getId());
            Intent intent = new Intent(getContext(), InvoiceActivity.class);
            intent.putExtra("id", invoice.getId());
            getContext().startActivity(intent);
        }
    });`

fxvdh 8 年前

所以我终于找到了 solution 简而言之,它将此侦听器设置为ListView一行内的所有视图:

    /** A definition of a listener that does nothing but to let the click be handled by the parent **/
    View.OnClickListener listener = new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            ((ListView) parent).performItemClick(v, position, 0);
        }
    };

    date.setOnClickListener(listener);
    total.setOnClickListener(listener);
    paid.setOnClickListener(listener);

并实施 OnItemClickedListener 对于MainActivity内的ListView