ListView item 中TextView 如何获取长按事件-白红宇

ListView item 中TextView 如何获取长按事件

阅读量：7228 次

发布时间：2019-06-29

本文共 4007 字，大约阅读时间需要 13 分钟。

昨天晚上小伙伴突然来信, ListView item中嵌套的TextView 无法获取长按事件

从前从来没有仔细留意过, coding后发现...果然没什么动静

而且没有合适的API让我调用获取TextView 的 setOnLongClickListener 事件

思考ing

ListView几大要素

xml: item模板 --- 这个不可能绑定事件

java: ListView本身 --- 有可能, 但是本身没有提供API

adapter: 直接使用现成的 SimpleAdapter --- 无法做到, 以前做过重写Adapter的事好像...

有个 getView 方法是必须重写的, 然后里面貌似可以操作单个控件 .... 恩有可能,动手试试

定义MyAdapter类:

import android.content.Context;import android.util.Log;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.TextView;import java.util.List;import java.util.Map;/** * Created by root on 15-11-6. */public class MyAdapter extends BaseAdapter {    LayoutInflater mLayoutInflater;    List
      
       > mData;    public static final String KEY_NAME = "name";    // Context context, MyAdapter    public MyAdapter(Context context, List
       
        
         > data) {        mLayoutInflater = LayoutInflater.from(context);        mData = data;    }    @Override    public View getView(int position, View convertView, ViewGroup parent) {        if(convertView == null) {            convertView = mLayoutInflater.inflate(R.layout.listview_item_text, null);            TextView tv = (TextView) convertView.findViewById(R.id.text1);            tv.setText(mData.get(position).get(KEY_NAME).toString());            tv.setOnLongClickListener(new View.OnLongClickListener() {                @Override                public boolean onLongClick(View v) {                    Log.d("carlozlog", "TextView be long click");                    return true;                }            });        }        return convertView;    }    @Override    public int getCount() {        return mData.size();    }    @Override    public Object getItem(int position) {        return null;    }    @Override    public long getItemId(int position) {        return 0;    }}

此处用到一个ListViiew的 item 模板

listview_item_text.xml

使用adaper: MainActivity.java 中

public class MainActivity extends AppCompatActivity {    // view    private ListView listView1;    // data    Context mContext;    //SimpleAdapter mSimpleAdapter;    MyAdapter mMyAdapter;    String tag = "carlozlog";    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        mContext = getApplicationContext();        Map
     
       map1 = new HashMap<>();        map1.put(MyAdapter.KEY_NAME, "Hello World");        Map
      
        map2 = new HashMap<>();        map2.put(MyAdapter.KEY_NAME, "Lu Xun");        Map
       
         map3 = new HashMap<>();        map3.put(MyAdapter.KEY_NAME, "Zhu De");        Map
        
          map4 = new HashMap<>();        map4.put(MyAdapter.KEY_NAME, "Lao Mao");        List
         
          
           > listData = new ArrayList<>(); listData.add(map1); listData.add(map2); listData.add(map3); listData.add(map4); //mSimpleAdapter = new SimpleAdapter(mContext, listData, R.layout.listview_item_text, new String[]{"name"}, new int[]{R.id.text1}); mMyAdapter = new MyAdapter(mContext, listData); listView1 = (ListView)findViewById(R.id.listview1); listView1.setAdapter(mMyAdapter); listView1.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() { @Override public boolean onItemLongClick(AdapterView
            parent, View view, int position, long id) { Log.d(tag, "listview item " + view.getId() + " has been long clicked"); return false; } }); }}

如此就成了, 看log, 搜关键字 carlozlog

11-06 06:56:58.204  12719-12719/? D/carlozlog﹕ TextView be long click11-06 06:56:59.869  12719-12719/? D/carlozlog﹕ TextView be long click11-06 06:57:02.115  12719-12719/? D/carlozlog﹕ TextView be long click11-06 06:57:04.845  12719-12719/? D/carlozlog﹕ TextView be long click11-06 06:57:06.596  12719-12719/? D/carlozlog﹕ TextView be long click11-06 06:57:08.755  12719-12719/? D/carlozlog﹕ TextView be long click11-06 06:57:10.189  12719-12719/? D/carlozlog﹕ TextView be long click

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