Android 上下文菜单 ContextMenu

public class MainActivity extends Activity {

    private ListView listView;

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

        listView = (ListView) this.findViewById(R.id.listView);
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(,android.R.layout.simple_expandable_list_item_1,getData());
        listView.setAdapter(adapter);

        // 给listView注册上下文菜单
        registerForContextMenu(listView);
    }

    public List<String> getData() {
        List<String> list = new ArrayList<String>();
        for (int i = 0; i < 7; i++) {
            list.add("thomas " + i);
        }

        return list;
    }

    @Override
    boolean onCreateOptionsMenu(Menu menu) {
         Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main,menu);
        return true;
    }

    @Override
     onCreateContextMenu(ContextMenu menu,View v,ContextMenuInfo menuInfo) {
         TODO Auto-generated method stub
        .onCreateContextMenu(menu,v,menuInfo);

        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.main,menu);
    }

     上下文菜单被选择
    @Override
     onContextItemSelected(MenuItem item) {
        switch (item.getItemId()) {
        case R.id.action_add:
            Toast.makeText(this,"添加被点击",1).show();
            break;
         R.id.action_delete:
            Toast.makeText(;

        default:
            ;
        }

        .onContextItemSelected(item);
    }
}