Android 一些基本组件的使用

AlertDialog dialog = new AlertDialog.Builder(context).setTitle("写入信息")
                .setView(view)
                .setPositiveButton("确认", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {

                    }
                }).setNegativeButton("取消", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {

                    }
                })
                .create();
dialog.show();

    public final class ViewHolder {
        public TextView describe;
        public TextView username;
        public TextView password;
    }
　　@Override
    public View getView(int position, View convertView, ViewGroup parent) {

        ViewHolder holder=null;
        if (convertView==null){
            holder = new ViewHolder();
            convertView=mInflater.inflate(R.layout.adapter_account_item,null);
            holder.describe=(TextView)convertView.findViewById(R.id.describe);
            holder.username=(TextView)convertView.findViewById(R.id.username);
            holder.password=(TextView)convertView.findViewById(R.id.password);
            convertView.setTag(holder);
        }else{
            holder = (ViewHolder) convertView.getTag();
        }
        holder.describe.setText(listdata.get(position).getDescribe());
        holder.username.setText(listdata.get(position).getAccount());
        holder.password.setText(listdata.get(position).getPassword());

        return convertView;
    }