android listview使用simple_list_item_checked onItemLongClick没有按预期检查

时间:2017-01-17 15:40:08

标签: android listview onitemclick onitemlongclicklistener

我有ListView使用android.R.layout.simple_list_item_checked,我想要设置onItemLongClick()侦听器和onItemClick()侦听器来执行不同的操作。如何长按来检查/取消选中该项,而不是(短)点击?感谢

我已尝试将长按返回false,因此不会消耗该事件,但长按不会检查/取消选中。只需短暂点击即可。我还尝试人为地撤消短按(已注释掉的代码)中的检查,但这并不符合预期。

如果我删除短按回调,则长按仍然不会选中/取消选中。此外,短暂点击将继续检查/取消选中。

编辑 - 让我完整地展示代码:

package com.example.checked;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.CheckedTextView;
import android.widget.ListView;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {

    ListView myListView;
    ArrayList<String> myData = new ArrayList<String>();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        myListView = (ListView) findViewById(R.id.myListView);

        // test data
        myData = new ArrayList<String>();
        myData.add("apple");
        myData.add("banana");
        myData.add("cherry");
        myData.add("durian");
        myData.add("eggplant");

        ArrayAdapter myAdapter = new ArrayAdapter(this, android.R.layout.simple_list_item_checked, myData) {
            @Override
            public View getView(int position, View convertView, ViewGroup parent) {
                View view = super.getView(position, convertView, parent);
                CheckedTextView ctv = (CheckedTextView) view.findViewById(android.R.id.text1);
                ctv.setFocusable(false);
                ctv.setText(myData.get(position));
                ((ListView)parent).setItemChecked(position, false);
                return view;
            }
        };

        myListView.setAdapter(myAdapter);
        myListView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);

        myListView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
            @Override
            public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
                CheckedTextView ctv = (CheckedTextView) view;
                Log.i("onItemLongClick", "position=" + position + ", id=" + id + ", isChecked=" + ctv.isChecked());
                // do something
                return false;
            }
        });

        myListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                CheckedTextView ctv = (CheckedTextView) view;
                Log.i("onItemClick", "position=" + position + ", id=" + id + ", isChecked=" + ctv.isChecked());
                //if (ctv.isChecked()) ctv.setChecked(false);
                //else if (!ctv.isChecked()) ctv.setChecked(true);
                // do something else
            }
        });
    }
}

和xml:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.checked.MainActivity">

    <LinearLayout
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center"
        android:weightSum="100">

        <ListView
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_alignParentTop="true"
            android:layout_weight="80"
            android:id="@+id/myListView" />

    </LinearLayout>

</RelativeLayout>

执行以下操作的日志输出:

  • 长按“apple”
  • 再次点击“apple”
  • 点击“banana”
  • 再次点击“香蕉”

01-17 10:23:45.628 14928-14928/com.example.checked I/onItemLongClick: position=0, id=0, isChecked=false 01-17 10:23:46.242 14928-14928/com.example.checked I/onItemClick: position=0, id=0, isChecked=true 01-17 10:23:50.655 14928-14928/com.example.checked I/onItemLongClick: position=0, id=0, isChecked=true 01-17 10:23:51.002 14928-14928/com.example.checked I/onItemClick: position=0, id=0, isChecked=false 01-17 10:23:53.756 14928-14928/com.example.checked I/onItemClick: position=1, id=1, isChecked=true 01-17 10:23:55.131 14928-14928/com.example.checked I/onItemClick: position=1, id=1, isChecked=false

以上含义是onItemLongClick()没有检查/取消选中该项目而只检查onItemLick(),这与我想要的完全相反。

编辑#2 - 我尝试将listview xml更改为以下内容,同时保持java代码不变:

<ListView
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_alignParentTop="true"
android:layout_weight="80"
android:longClickable="true"
android:clickable="false"
android:id="@+id/myListView" />

但短暂的点击仍然生效,提供以下日志:

01-17 10:38:18.703 25598-25598/com.example.checked I/onItemLongClick: position=0, id=0, isChecked=false 01-17 10:38:18.973 25598-25598/com.example.checked I/onItemClick: position=0, id=0, isChecked=true 01-17 10:38:22.212 25598-25598/com.example.checked I/onItemLongClick: position=0, id=0, isChecked=true 01-17 10:38:22.353 25598-25598/com.example.checked I/onItemClick: position=0, id=0, isChecked=false 01-17 10:38:28.951 25598-25598/com.example.checked I/onItemClick: position=1, id=1, isChecked=true 01-17 10:38:30.391 25598-25598/com.example.checked I/onItemClick: position=1, id=1, isChecked=false

编辑#3 - 现在如果我onItemLongClick()返回true而不是false,则长点击仍然无法选中/取消选中,但短线点击仍会继续检查/取消选中,给出以下日志:

01-17 10:43:45.181 28980-28980/com.example.checked I/onItemLongClick: position=0, id=0, isChecked=false 01-17 10:43:49.386 28980-28980/com.example.checked I/onItemLongClick: position=0, id=0, isChecked=false 01-17 10:43:53.662 28980-28980/com.example.checked I/onItemClick: position=1, id=1, isChecked=true 01-17 10:43:55.211 28980-28980/com.example.checked I/onItemClick: position=1, id=1, isChecked=false

1 个答案:

答案 0 :(得分:0)

android:longClickable="true"添加到您的listview