GridView 设置选中状态

GridView设置选中状态

设置原理 是将bean中的数据加入一个字段isSelect  默认填充数据的时候 ，默认选中的第一个值 设置为true，其余的都设置为false.

然后 点击单个item的时候 ，循环list<bean> 将选中的position 的item设置为true，其余的都设置为false  ,然后adapter notify.

activity

代码语言：javascript复制

package com.example.refreshgridview;

import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.GridView;
import android.widget.Toast;

import com.example.refreshgridview.PullToRefreshBase.OnRefreshListener;

public class MainActivity extends Activity {
	private PullToRefreshGridView mPullRefreshGridView;
	private GridView mGridView;
	private GridViewAdapter adapter;
	private List<GridInfo> list = new ArrayList<GridInfo>();
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		mPullRefreshGridView = (PullToRefreshGridView) findViewById(R.id.video_gridView);
		mPullRefreshGridView.init(PullToRefreshGridView.MODE_BOTH);
		mGridView = mPullRefreshGridView.getRefreshableView();
		mPullRefreshGridView.setOnRefreshListener(refreshListener);
		for (int i = 0; i < 40; i  ) {
			GridInfo gridInfo = new GridInfo();
			gridInfo.setTitle((i) "");
			if(i==0){
				gridInfo.setSelect(true);
			}else{
				gridInfo.setSelect(false);
			}
			list.add(gridInfo);
		}
		adapter = new GridViewAdapter(MainActivity.this,list);
		mGridView.setAdapter(adapter);
		mGridView.setOnItemClickListener(new OnItemClickListener() {

			@Override
			public void onItemClick(AdapterView<?> parent, View view,
					int position, long id) {
				
				   for(int i=0;i<list.size();i  ){
		               if (position == i) {//当前选中的Item改变背景颜色
		            	   list.get(i).setSelect(true);
		               } else {
		            	   list.get(i).setSelect(false);
		               }
		            }
				   adapter.notifyDataSetChanged();
				
			}
		});
	}
	private OnRefreshListener refreshListener = new OnRefreshListener() {
		@Override
		public void onRefresh(int mode) {
			if (PullToRefreshGridView.MODE_PULL_DOWN_TO_REFRESH == mPullRefreshGridView.getCurrentMode()) {
				Toast.makeText(MainActivity.this, "下拉刷新", Toast.LENGTH_SHORT).show();
				mPullRefreshGridView.onRefreshComplete();
			} else if (mode == PullToRefreshGridView.MODE_PULL_UP_TO_REFRESH) {
				// 加载更多
				Toast.makeText(MainActivity.this, "上拉加载更多", Toast.LENGTH_SHORT).show();
				mPullRefreshGridView.onRefreshComplete();
			}
		}
	};
}

adapter

代码语言：javascript复制

package com.example.refreshgridview;

import java.util.ArrayList;
import java.util.List;


import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

public class GridViewAdapter extends BaseAdapter {

    private List<GridInfo> mList = new ArrayList<GridInfo>();

    private Context mContext;

    public GridViewAdapter(Context context,List<GridInfo> list) {
        super();
        this.mContext = context;
        this.mList = list;
    }

    @Override
    public int getCount() {
        return mList.size();
    }

    @Override
    public GridInfo getItem(int position) {
        return mList.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
    	ChildHolderOne holder;
        if (convertView == null) {
            convertView = LayoutInflater.from(mContext).inflate(R.layout.item_grid_live_show, parent, false);
            holder = new ChildHolderOne();
            holder.tvTitle = (TextView)convertView.findViewById(R.id.title_tv);
            convertView.setTag(holder);
        } else {
            holder = (ChildHolderOne) convertView.getTag();
        }
        final GridInfo gridInfo = mList.get(position);
        if(gridInfo.isSelect() == true){
        	holder.tvTitle.setBackgroundColor(mContext.getResources().getColor(R.color.grays));
        } else {
        	holder.tvTitle.setBackgroundColor(mContext.getResources().getColor(R.color.gray_max));
        }
        final String number = gridInfo.getTitle();
        holder.tvTitle.setText(number);
        
        
        return convertView;
    }

	class ChildHolderOne {
		TextView tvTitle;
	}
	
}

bean

代码语言：javascript复制

package com.example.refreshgridview;

public class GridInfo {
	private String title;
	private boolean isSelect;
	public String getTitle() {
		return title;
	}
	public void setTitle(String title) {
		this.title = title;
	}
	public boolean isSelect() {
		return isSelect;
	}
	public void setSelect(boolean isSelect) {
		this.isSelect = isSelect;
	}
}

很简单效果 ，和listview单选 ，多选都是一个道理，就是记住并操作当前位置的数据 然后刷新。

DEMO源码

这个源码 是在上一篇给GridView添加 下拉刷新 下拉加载的demo基础上加的，所以这个里面也有GridView上拉下拉的功能。希望可以帮到大家。

listview adapter gridview list position

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