Android列表组件ListView子项的点击事件与子项中组件的点击事件

点击ListView子项时进行相关的逻辑操作,为ListView组件添加子项点击事件:

//设置ListView子项的点击事件
        testLv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView parent, View view, int position, long id) {
                Toast.makeText(ListViewDemoActivity.this, "点击的子项ID = " + position, Toast.LENGTH_SHORT).show();
            }
        });

ListView子项中组件的点击事件,在适配器中添加,这样不会与ListView子项的点击事件产生冲突问题:

//设置内容文本组件的点击事件
        viewHolder.contentTv.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(context, dataList.get(position), Toast.LENGTH_LONG).show();
            }
        });

完整代码:

package net.oschina.git.zhaikun.androiddeveloped.activitys;

import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.widget.AbsListView;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Toast;

import net.oschina.git.zhaikun.androiddeveloped.R;
import net.oschina.git.zhaikun.androiddeveloped.adapter.ListViewDemoAdapter;

import java.util.ArrayList;
import java.util.List;

/**
 * Created by zhaikun68 on 2018/3/5.
 * 

* ListView演示Demo */ public class ListViewDemoActivity extends AppCompatActivity implements View.OnClickListener, View.OnTouchListener, AbsListView.OnScrollListener { private static final String TAG = "ListViewDemoActivity";//日志打印标记 private ListView testLv;//ListView组件 private Button updateDataBtn;//动态加载数据组件 private List dataList = new ArrayList<>();//存储数据 private ListViewDemoAdapter listViewDemoAdapter;//ListView的数据适配器 private int firstVisibleItem = 0;//记录ListView滑动过程中,当前可视区域第一个子项的ID @Override protected void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_listview_demo); initView();//初始化组件 initData();//初始化数据 } /** * 初始化组件 */ private void initView() { testLv = (ListView) findViewById(R.id.test_lv); updateDataBtn = (Button) findViewById(R.id.update_data_btn); updateDataBtn.setOnClickListener(this);//动态加载数据组件的点击事件 testLv.setOnTouchListener(this);//设置ListView组件的触摸事件 testLv.setOnScrollListener(this);//设置ListView组件的滑动监听事件 //设置ListView子项的点击事件 testLv.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView parent, View view, int position, long id) { Toast.makeText(ListViewDemoActivity.this, "点击的子项ID = " + position, Toast.LENGTH_SHORT).show(); } }); } /** * 初始化数据 */ private void initData() { //初始化10项数据 for (int i = 1; i <= 20; i++) { dataList.add("显示内容" + i); } //设置ListView的适配器 listViewDemoAdapter = new ListViewDemoAdapter(this, dataList); testLv.setAdapter(listViewDemoAdapter); //testLv.setSelection(4); //数据为空时显示的提示信息 testLv.setEmptyView(findViewById(R.id.empty_tv)); } @Override public void onClick(View v) { switch (v.getId()) { case R.id.update_data_btn://动态加载列表数据 dataList.add("动态加载的数据项"); //通知ListView更改数据源 if (listViewDemoAdapter != null) { listViewDemoAdapter.notifyDataSetChanged(); testLv.setSelection(dataList.size() - 1);//设置显示列表的最后一项 } else { listViewDemoAdapter = new ListViewDemoAdapter(this, dataList); testLv.setAdapter(listViewDemoAdapter); testLv.setSelection(dataList.size() - 1); } break; } } @Override public boolean onTouch(View v, MotionEvent event) { switch (event.getAction()) { case MotionEvent.ACTION_DOWN://触摸屏幕时,只执行一次 Log.i(TAG, "执行触摸时的操作"); break; case MotionEvent.ACTION_MOVE://触摸到屏幕时,反复执行 Log.i(TAG, "执行移动时的操作"); break; case MotionEvent.ACTION_UP://离开屏幕时,只执行一次 Log.i(TAG, "执行触摸离开时的操作"); break; } return false; } @Override public void onScrollStateChanged(AbsListView view, int scrollState) { switch (scrollState) { case SCROLL_STATE_IDLE://停止滑动 Log.w(TAG, "停止滑动"); break; case SCROLL_STATE_TOUCH_SCROLL://正在滑动 Log.w(TAG, "正在滑动"); break; case SCROLL_STATE_FLING://滑动ListView离开后,由于惯性继续滑动 Log.w(TAG, "滑动ListView离开后,由于惯性继续滑动"); break; } } @Override public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) { /* ListView滑动时,一直回调该方法 firstVisibleItem:当前能看到的第一个子项的ID(从0开始) visibleItemCount:当前能看到的子项的总数,包含未完整显示的子项,比如只显示了一小部分的子项 totalItemCount:所有子项的总数 */ Log.e(TAG, "当前能看到的第一个子项的ID(从0开始)= " + firstVisibleItem); Log.e(TAG, "当前能看到的子项的总数 = " + visibleItemCount); Log.e(TAG, "所有子项的总数 = " + totalItemCount); //可用于底部加载更多数据的判断逻辑 if (firstVisibleItem + visibleItemCount == totalItemCount && totalItemCount > 0) { Log.e(TAG, "滑动到ListView的最后一个子项"); } //判断ListView的滑动方向 if (this.firstVisibleItem == firstVisibleItem) { Log.e(TAG, "未发生滑动"); } else if (this.firstVisibleItem > firstVisibleItem) { Log.e(TAG, "发生下滑"); } else { Log.e(TAG, "发生上滑"); } this.firstVisibleItem = firstVisibleItem; } }

布局文件:




    

列表数据适配器:

package net.oschina.git.zhaikun.androiddeveloped.adapter;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import net.oschina.git.zhaikun.androiddeveloped.R;

import java.util.List;

/**
 * Created by zhaikun68 on 2018/3/5.
 * 

* ListView演示Demo中的数据适配器 */ public class ListViewDemoAdapter extends BaseAdapter { private Context context;//上下文对象 private List dataList;//ListView显示的数据 /** * 构造器 * * @param context 上下文对象 * @param dataList 数据 */ public ListViewDemoAdapter(Context context, List dataList) { this.context = context; this.dataList = dataList; } @Override public int getCount() { return dataList == null ? 0 : dataList.size(); } @Override public Object getItem(int position) { return dataList.get(position); } @Override public long getItemId(int position) { return position; } @Override public View getView(final int position, View convertView, ViewGroup parent) { ViewHolder viewHolder; //判断是否有缓存 if (convertView == null) { convertView = LayoutInflater.from(context).inflate(R.layout.item_listview_demo, null); viewHolder = new ViewHolder(convertView); convertView.setTag(viewHolder); } else { //得到缓存的布局 viewHolder = (ViewHolder) convertView.getTag(); } //设置图片 viewHolder.pictureImg.setImageResource(R.mipmap.ic_launcher); //设置内容 viewHolder.contentTv.setText(dataList.get(position)); //设置内容文本组件的点击事件 viewHolder.contentTv.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Toast.makeText(context, dataList.get(position), Toast.LENGTH_LONG).show(); } }); return convertView; } /** * ViewHolder类 */ private final class ViewHolder { ImageView pictureImg;//图片 TextView contentTv;//内容 /** * 构造器 * * @param view 视图组件(ListView的子项视图) */ ViewHolder(View view) { pictureImg = (ImageView) view.findViewById(R.id.picture_img); contentTv = (TextView) view.findViewById(R.id.content_tv); } } }

列表子项布局文件:




    

    

 

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