最近登录的效果下拉列表




相信大家都有使用QQ的最近的登录的下拉框，点击可以显示最近登录的效果，点击选项可以将内容提交到输入框，实现快速输入数据的效果。





<span style="font-size:18px;">packagecomflyou.down.select;

 

importjava.util.ArrayList;

 

importandroid.app.Activity;

importandroid.os.Bundle;

importandroid.renderscript.Type.CubemapFace;

importandroid.view.View;

importandroid.view.View.OnClickListener;

importandroid.view.ViewGroup;

importandroid.widget.BaseAdapter;

importandroid.widget.EditText;

importandroid.widget.ImageView;

importandroid.widget.ListView;

importandroid.widget.PopupWindow;

importandroid.widget.TextView;

 

publicclass MainActivity extendsActivity {

  privateEditText msg;

  privateImageView image;

  privatePopupWindow popupWindow;

  privateArrayList<string> dataList;

  privateListView myListview;

 

  @Override

  protectedvoid onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_main);

    msg = (EditText) findViewById(R.id.tv_msg);

    image = (ImageView) findViewById(R.id.iv_down_arrow);

    myListview = newListView(MainActivity.this);

    popupWindow = newPopupWindow(getApplicationContext());

    // 填充数据

    dataList = newArrayList<string>();

    for(inti = 0; i < 20; i++) {

      dataList.add(flyou + i);

    }

    // 初始化数据

    init();

    // 初始化lictview

    initListView();

  }

 

  privatevoid init() {

 

    image.setOnClickListener(newOnClickListener() {

      @Override

      publicvoid onClick(View v) {

        // 设置PopupWindow的宽度

        popupWindow.setWidth(msg.getWidth());

        // 设置PopupWindow的高度

        popupWindow.setHeight(300);

        popupWindow.setContentView(myListview);

 

        popupWindow.setOutsideTouchable(true);

        popupWindow.showAsDropDown(msg,0,0);

      }

    });

 

  }

 

  privatevoid initListView() {

 

    myListview.setBackgroundResource(R.drawable.listview_background);// 设置listView

                                                                      // 背景

    myListview.setDivider(null);// 设置条目之间的分隔线为null

    myListview.setVerticalScrollBarEnabled(false);// 关闭

    myListview.setAdapter(newMyAdapter());

 

  }

 

  publicclass MyAdapter extendsBaseAdapter {

 

    @Override

    publicint getCount() {

      returndataList.size();

    }

 

    @Override

    publicObject getItem(intposition) {

      returnposition;

    }

 

    @Override

    publiclong getItemId(intposition) {

      return0;

    }

 

    @Override

    publicView getView(finalint position, View convertView, ViewGroup parent) {

      ViewHolder holder;

      if(convertView == null) {

        convertView = View.inflate(getApplicationContext(), R.layout.list_item, null);

        holder = newViewHolder();

        holder.iv_delete = (ImageView) convertView.findViewById(R.id.iv_delete);

        holder.iv_user = (ImageView) convertView.findViewById(R.id.iv_user);

      holder.tv_msg=(TextView)convertView.findViewById(R.id.tv_msg);

        convertView.setTag(holder);

      }else{

 

        holder = (ViewHolder) convertView.getTag();

 

      }

       

      holder.tv_msg.setText(dataList.get(position));

      holder.iv_delete.setOnClickListener(newOnClickListener() {

 

        @Override

        publicvoid onClick(View v) {

          // 移除数据

          dataList.remove(position);

          //更新listview

          MyAdapter.this.notifyDataSetChanged();

        }

      });

      convertView.setOnClickListener(newOnClickListener() {

 

        @Override

        publicvoid onClick(View v) {

          msg.setText(dataList.get(position));

          popupWindow.dismiss();

        }

 

      });

      returnconvertView;

    }

 

   

  }

 //数据缓存

  privateclass ViewHolder {

    ImageView iv_delete;

    TextView tv_msg;

    ImageView iv_user;

 

  }

 

}

</string></string></span>