android ListView GridView 单选和复选列子

其他 2020-04-27 10:00:42 阅读次数: 0

android ListView GridView 单选和复选列子

1.看到论坛有 同学不会写 listview item 的单选和 复选 所以写了一个发出来 单选类（SignChooseActivity）

package com.zhx.listdemo;

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

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ListView;

public class SignChooseActivity extends Activity {
    private ListView mListView;
    private TextAdapter mAdapter;
    private List<String> mList = new ArrayList<String>();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_sign);
        mListView = (ListView) findViewById(R.id.text_listview);
        for (int i = 0; i < 20; i++) {
            mList.add("去约车" + i);
        }
        mAdapter = new TextAdapter(mList, this);
        mListView.setAdapter(mAdapter);

    }
}

2.单选适配器

package com.zhx.listdemo;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import android.app.Activity;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.ImageView;
import android.widget.TextView;

public class TextAdapter extends BaseAdapter {
    private List<String> list;
    private Activity activity;
    private Map<String, Boolean> isSelectedMap = new HashMap<String, Boolean>();

    public TextAdapter(List<String> list, Activity activity) {
        super();
        this.list = list;
        this.activity = activity;
        for (int i = 0; i < list.size(); i++) {
            isSelectedMap.put(i + "", false);
        }
    }

    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        return list == null ? 0 : list.size();
    }

    @Override
    public Object getItem(int position) {
        // TODO Auto-generated method stub
        return position;
    }

    @Override
    public long getItemId(int position) {
        // TODO Auto-generated method stub
        return position;
    }

    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {
        // TODO Auto-generated method stub
        ViewHolder holder = null;
        if (convertView == null) {
            holder = new ViewHolder();
            convertView = activity.getLayoutInflater().inflate(
                    R.layout.test_item, null);
            holder.tv = (TextView) convertView.findViewById(R.id.test_tv);
            holder.box = (ImageView) convertView
                    .findViewById(R.id.test_check_box);
            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }

        convertView.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub

                for (int i = 0; i < list.size(); i++) {
                    if (i == position) {
                        Log.i("点击项目", position + "");
                        isSelectedMap.put(i + "", true);
                    } else {
                        Log.i("未点击项目", position + "");
                        isSelectedMap.put(i + "", false);
                    }
                }
                notifyDataSetChanged();
            }
        });
        Log.i("选中项", position + "@" + isSelectedMap.get(position + "") + "");
        if (isSelectedMap.get(position + "")) {
            holder.box.setImageResource(R.drawable.multi_select_flag);
        } else {
            holder.box.setImageResource(R.drawable.ic_launcher);
        }
        holder.tv.setText(list.get(position));
        return convertView;
    }

    class ViewHolder {
        TextView tv;
        ImageView box;
    }

}

package com.zhx.listdemo;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import android.app.Activity;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.ImageView;
import android.widget.TextView;

public class TextAdapter extends BaseAdapter {
    private List<String> list;
    private Activity activity;
    private Map<String, Boolean> isSelectedMap = new HashMap<String, Boolean>();

    public TextAdapter(List<String> list, Activity activity) {
        super();
        this.list = list;
        this.activity = activity;
        for (int i = 0; i < list.size(); i++) {
            isSelectedMap.put(i + "", false);
        }
    }

    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        return list == null ? 0 : list.size();
    }

    @Override
    public Object getItem(int position) {
        // TODO Auto-generated method stub
        return position;
    }

    @Override
    public long getItemId(int position) {
        // TODO Auto-generated method stub
        return position;
    }

    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {
        // TODO Auto-generated method stub
        ViewHolder holder = null;
        if (convertView == null) {
            holder = new ViewHolder();
            convertView = activity.getLayoutInflater().inflate(
                    R.layout.test_item, null);
            holder.tv = (TextView) convertView.findViewById(R.id.test_tv);
            holder.box = (ImageView) convertView
                    .findViewById(R.id.test_check_box);
            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }

        convertView.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub

                for (int i = 0; i < list.size(); i++) {
                    if (i == position) {
                        Log.i("点击项目", position + "");
                        isSelectedMap.put(i + "", true);
                    } else {
                        Log.i("未点击项目", position + "");
                        isSelectedMap.put(i + "", false);
                    }
                }
                notifyDataSetChanged();
            }
        });
        Log.i("选中项", position + "@" + isSelectedMap.get(position + "") + "");
        if (isSelectedMap.get(position + "")) {
            holder.box.setImageResource(R.drawable.multi_select_flag);
        } else {
            holder.box.setImageResource(R.drawable.ic_launcher);
        }
        holder.tv.setText(list.get(position));
        return convertView;
    }

    class ViewHolder {
        TextView tv;
        ImageView box;
    }

}

3.单选用的是listview 复选用gridview 做例子 其实一样的换个名字就好了 (MultChooseActivity)

package com.zhx.listdemo;


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

import android.app.Activity;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.util.TypedValue;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.RelativeLayout.LayoutParams;
import android.widget.TextView;

public class MultChooseActivity extends Activity {
    private Button mBack;
    private Button mAll;
    private GridView mDisplay;
    private TextView mCount;
    private AlbumAdapter mAdapter;

    private List<String> mSelect = new ArrayList<String>();// 存放当前用户选择的图片的编号
    private int imagesId[] = { R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher,
            R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher,
            R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher,
            R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher,
            R.drawable.ic_launcher, R.drawable.ic_launcher,R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher,
            R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher,
            R.drawable.ic_launcher, R.drawable.ic_launcher,R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher,
            R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher,
            R.drawable.ic_launcher, R.drawable.ic_launcher,R.drawable.ic_launcher, R.drawable.ic_launcher };

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.album_activity);
        findViewById();
        setListener();
        init();

    }

    private void findViewById() {
        mBack = (Button) findViewById(R.id.album_back);
        mAll = (Button) findViewById(R.id.album_all);
        mDisplay = (GridView) findViewById(R.id.album_display);
        mCount = (TextView) findViewById(R.id.album_count);
    }

    private void setListener() {
        mBack.setOnClickListener(new OnClickListener() {

            public void onClick(View v) {
                // 关闭当前界面
                finish();
            }
        });
        mAll.setOnClickListener(new OnClickListener() {

            public void onClick(View v) {
                if (mSelect.size() == imagesId.length) {
                    // 全部选中时,点击为反选,所以清空
                    mSelect.clear();
                } else if (mSelect.size() > 0) {
                    // 当已选中时,点击为全选,添加没选择中的
                    for (int i = 0; i < imagesId.length; i++) {
                        if (mSelect.contains(String.valueOf(i))) {
                            continue;
                        }
                        mSelect.add(String.valueOf(i));
                    }
                } else {
                    // 没选中,点击为全选,添加所有
                    for (int i = 0; i < imagesId.length; i++) {
                        mSelect.add(String.valueOf(i));
                    }
                }
                // 如果全部选中则显示反选,否则显示全选
                if (mSelect.size() == imagesId.length) {
                    mAll.setText("反选");
                } else {
                    mAll.setText("全选");
                }
                // 更新界面显示数量内容
                initCount(mSelect.size());
                // 刷新界面
                mAdapter.notifyDataSetChanged();
            }
        });
        mDisplay.setOnItemClickListener(new OnItemClickListener() {

            public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
                // 查看当前点击的条目是否已经选中,选中则移出,没选中则删除
                if (mSelect.contains(String.valueOf(arg2))) {
                    mSelect.remove(String.valueOf(arg2));
                } else {
                    mSelect.add(String.valueOf(arg2));
                }
                // 如果全部选中则显示反选,否则显示全选
                if (mSelect.size() == imagesId.length) {
                    mAll.setText("反选");
                } else {
                    mAll.setText("全选");
                }
                // 更新界面显示数量内容
                initCount(mSelect.size());
                // 刷新界面
                mAdapter.notifyDataSetChanged();
            }
        });
    }

    private void init() {
        // 更新界面显示数量内容
        initCount(mSelect.size());
        // 初始化适配器
        mAdapter = new AlbumAdapter();
        // 添加适配器
        mDisplay.setAdapter(mAdapter);
    }

    /**
     * 更新界面显示数量内容
     * 
     * @param count
     *            选中的图片数量
     */
    private void initCount(int count) {
        // 更新选择的图片数量,如果数量大于0,设置确定按钮为可用,反之不可用并修改字体颜色
        if (count > 0) {
            mCount.setText("已选择" + count + "张");
            mCount.setTextColor(0xFFFFFFFF);
        } else {
            mCount.setText("已选择0张");
            mCount.setTextColor(0xFF999999);
        }
    }

    private class AlbumAdapter extends BaseAdapter {

        public int getCount() {
            return imagesId.length;
        }

        public Object getItem(int position) {
            return null;
        }

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

        public View getView(int position, View convertView, ViewGroup parent) {
            ViewHolder holder = null;
            if (convertView == null) {
                convertView = LayoutInflater.from(MultChooseActivity.this).inflate(R.layout.album_activity_item, null);
                holder = new ViewHolder();
                holder.photo = (ImageView) convertView.findViewById(R.id.album_item_photo);
                holder.select = (ImageView) convertView.findViewById(R.id.album_item_select);
                // padding大小为40dip,计算px值
                int padding = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 40, MultChooseActivity.this
                        .getResources().getDisplayMetrics());
                // 设置显示的图片大小为屏幕宽度1/4大小
                LayoutParams params = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
                params.width = (480 - padding) / 4;
                params.height = (480 - padding) / 4;
                holder.photo.setLayoutParams(params);
                holder.select.setLayoutParams(params);
                convertView.setTag(holder);
            } else {
                holder = (ViewHolder) convertView.getTag();
            }
            // 添加图片
            holder.photo.setImageBitmap(BitmapFactory.decodeResource(getResources(), imagesId[position]));
            // 查看是否选中,选中则显示选中效果
            if (mSelect.contains(String.valueOf(position))) {
                holder.select.setVisibility(View.VISIBLE);
            } else {
                holder.select.setVisibility(View.GONE);
            }
            return convertView;
        }

        class ViewHolder {
            ImageView photo;
            ImageView select;
        }
    }
}

4 .下载地址https://github.com/zhoulinxue/Listdemo.git

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