Android(安卓)实现适配器中的子控件与Activity通信

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 datas;    public ListViewDemoAdapter(Context context,List 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 list = new ArrayList();    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 :

listitem.xml :

<?xml version="1.0" encoding="utf-8"?>

输出日志：

09-05 10:30:07.412 9088-9088/? D/ListViewDemoAdapter﹕ setmItemOnClickListener...
09-05 10:30:49.687 9088-9088/? D/ListViewDemoAdapter﹕ setOnClickListener-->onClick...

09-05 10:30:49.697 9088-9088/? D/MainActivity﹕ itemOnClickListener view...

源码

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