android activity中获取adapter中item中的某个控件

有时需要在activity中直接获取listview中每一项(item)的子控件，这个时候我可以使用接口来与activity通信，将子控件作为参数传递过来。代码如下：

ListViewDemoAdapter 适配器代码：

private static final String TAG = ListViewDemoAdapter.class.getSimpleName();
 
    /**
     * 上下文
     */
    private Context mContext;
 
    /**
     * LayoutInflater
     */
    private LayoutInflater mInflater;
 
    private List<String> datas;
 
    public ListViewDemoAdapter(Context context,List<String> list){
        this.mContext = context;
        this.datas = list;
        this.mInflater = LayoutInflater.from(context);
    }
 
    @Override
    public int getCount() {
        return datas.size();
    }
 
    @Override
    public String getItem(int position) {
        return datas.get(position);
    }
 
    @Override
    public long getItemId(int position) {
        return position;
    }
 
    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder = null;
        if(convertView == null){
            holder = new ViewHolder();
            convertView = mInflater.inflate(R.layout.listitem,null);
            holder.tv_name = (TextView) convertView.findViewById(R.id.tv_name);
            convertView.setTag(holder);
        }else{
            holder = (ViewHolder) convertView.getTag();
        }
        holder.tv_name.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Log.d(TAG,"setOnClickListener-->onClick...");
                //回调传递点击的view
                mItemOnClickListener.itemOnClickListener(v);
            }
        });
        return convertView;
    }
 
    private ItemOnClickListener mItemOnClickListener;
 
    public void setmItemOnClickListener(ItemOnClickListener listener){
        Log.d(TAG,"setmItemOnClickListener...");
        this.mItemOnClickListener = listener;
    }
 
    public interface ItemOnClickListener{
        /**
         * 传递点击的view
         * @param view
         */
        public void itemOnClickListener(View view);
    }
 
    public class ViewHolder{
        public TextView tv_name;
    }

MainActivity 代码：

public class MainActivity extends AppCompatActivity {
 
    private static final String TAG = MainActivity.class.getSimpleName();
 
    /**
     * listview
     */
    private ListView mLvDemo;
 
    private List<String> list = new ArrayList<String>();
 
    private  ListViewDemoAdapter mAdapter;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //初始化view
        initView();
        //初始化数据
        initData();
    }
 
    /**
     * 初始化view
     * @author crystal
     * @date 2015-9-4 22:24
     */
    private void initView(){
        //初始化listview
        mLvDemo = (ListView) findViewById(R.id.lv_demo);
        mAdapter = new ListViewDemoAdapter(MainActivity.this,list);
        mLvDemo.setAdapter(mAdapter);
 
        //获取点击的view子控件
        mAdapter.setmItemOnClickListener(new ListViewDemoAdapter.ItemOnClickListener() {
 
            /**
             *  点击的view子控件
             * @param view view子控件
             */
            @Override
            public void itemOnClickListener(View view) {
                Log.d(TAG, "itemOnClickListener view...");
                TextView tvName = (TextView)view;
                //提示点击的子控件的文本
                Toast.makeText(MainActivity.this,tvName.getText().toString(),Toast.LENGTH_LONG).show();
            }
        });
    }
 
    /**
     * 初始化数据
     * @author crystal
     * @date 2015-9-4 22:51
     */
    private void initData(){
        list.add("crystal");
        list.add("jack");
        list.add("tom");
        list.add("rose");
        list.add("lora");
        list.add("tony");
        mAdapter.notifyDataSetChanged(); //更新数据
    }
 
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }
 
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
 
        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }
 
        return super.onOptionsItemSelected(item);
    }
}

activity_main.xml :

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >
 
    <ListView
        android:id="@+id/lv_demo"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
    </ListView>
</LinearLayout>

listitem.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="wrap_content"
    android:padding="15dp"
    android:gravity="center_horizontal"
    android:orientation="horizontal">
 
    <TextView
        android:id="@+id/tv_name"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="crystal"/>
 
</LinearLayout>

转载自：https://blog.youkuaiyun.com/crystalddd/article/details/48223271?depth_1-utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromBaidu-1&utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromBaidu-1