• Android ListView(Selector 背景图片 全选 Checkbox等按钮)


    list_item.xml

    <?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent" >
    
        <ImageView
            android:id="@+id/img"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentLeft="true"
            android:layout_centerVertical="true"
            android:layout_margin="5dp" />
    
        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerVertical="true"
            android:layout_toRightOf="@id/img"
            android:orientation="vertical" >
    
            <TextView
                android:id="@+id/title"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="#ffffff"
                android:textSize="22sp" />
    
            <TextView
                android:id="@+id/info"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="#ffffff"
                android:textSize="13sp" />
        </LinearLayout>
    
        <CheckBox
            android:id="@+id/check"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentRight="true"
            android:layout_centerVertical="true"
            android:clickable="false"
            android:focusable="false"
            android:focusableInTouchMode="false" />
    
    </RelativeLayout>

    listview.xml

    <?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical" >
    
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:orientation="horizontal" >
    
            <Button
                android:id="@+id/button1"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="全选" />
    
            <Button
                android:id="@+id/button2"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="取消" />
    
            <Button
                android:id="@+id/button3"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="反选" />
    
            <TextView
                android:id="@+id/totalTv"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="共选了多少个" />
        </LinearLayout>
    
        <ListView
            android:id="@+id/mylistview"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="@android:color/white"
            android:divider="@android:color/darker_gray"
            android:dividerHeight="1dp"
            android:fadingEdge="none"
            android:scrollingCache="false" >
        </ListView>
    
    </LinearLayout>

    ViewHolder.java

    package com.wangzhu.demoselector;
    
    import android.widget.CheckBox;
    import android.widget.ImageView;
    import android.widget.TextView;
    
    public final class ViewHolder {
    
        public ImageView img;
        public TextView title;
        public TextView info;
        public CheckBox checkBox;
    }

    MyAdapter.java

    package com.wangzhu.demoselector;
    
    import java.util.HashMap;
    import java.util.List;
    import java.util.Map;
    
    import android.annotation.SuppressLint;
    import android.content.Context;
    import android.util.Log;
    import android.view.LayoutInflater;
    import android.view.View;
    import android.view.ViewGroup;
    import android.widget.BaseAdapter;
    import android.widget.CheckBox;
    import android.widget.ImageView;
    import android.widget.TextView;
    
    public class MyAdapter extends BaseAdapter {
    
        private Context context;
        private LayoutInflater inflater;
    
        private List<Map<String, Object>> items;
        private Map<Integer, Boolean> isSelectedMap;
    
        public MyAdapter(Context context, List<Map<String, Object>> items) {
            this.context = context;
            this.items = items;
            init();
        }
    
        private void init() {
            Log.d("MyAdapter", "MyAdapter init");
            inflater = LayoutInflater.from(context);
            isSelectedMap = new HashMap<Integer, Boolean>();
            for (int i = 0, size = items.size(); i < size; i++) {
                isSelectedMap.put(i, false);
            }
        }
    
        @Override
        public int getCount() {
            return items.size();
        }
    
        @Override
        public Object getItem(int position) {
            return items.get(position);
        }
    
        @Override
        public long getItemId(int position) {
            return position;
        }
    
        @SuppressLint("NewApi")
        @Override
        public View getView(final int position, View convertView, ViewGroup parent) {
            ViewHolder viewHolder = null;
            if (null == convertView) {
                convertView = inflater.inflate(R.layout.list_item, null);
                // convertView = inflater.inflate(R.layout.list_item_1, null);
                viewHolder = new ViewHolder();
                viewHolder.img = (ImageView) convertView.findViewById(R.id.img);
                viewHolder.title = (TextView) convertView.findViewById(R.id.title);
                viewHolder.info = (TextView) convertView.findViewById(R.id.info);
                viewHolder.checkBox = (CheckBox) convertView
                        .findViewById(R.id.check);
                convertView.setTag(viewHolder);
    
            } else {
                viewHolder = (ViewHolder) convertView.getTag();
            }
    
            viewHolder.img.setBackgroundResource(Integer.parseInt(String
                    .valueOf(items.get(position).get("img"))));
            viewHolder.title.setText(String.valueOf(items.get(position)
                    .get("title")));
            viewHolder.info
                    .setText(String.valueOf(items.get(position).get("info")));
    
            // 或者在list_item.xml中设置
            // android:background="@drawable/list_item_bg_selector"
    
            Log.d("MyAdapter",
                    "1===getView isSelected===" + convertView.isSelected()
                            + "   isChecked======"
                            + viewHolder.checkBox.isChecked());
    
            viewHolder.checkBox.setChecked(isSelectedMap.get(position));
            convertView.setPressed(isSelectedMap.get(position));
            convertView.setSelected(isSelectedMap.get(position));
            convertView.setActivated(isSelectedMap.get(position));
    
            Log.d("MyAdapter",
                    "2====getView isSelected===" + convertView.isSelected()
                            + "   isChecked======"
                            + viewHolder.checkBox.isChecked());
    
            // convertView
            // .setBackgroundResource(R.drawable.list_item_bg_color_selector);
            // convertView.setBackgroundResource(R.drawable.list_item_bg_selector);
    
            if (isSelectedMap.get(position)) {
                convertView.setBackgroundResource(R.drawable.child_list_bg_1);
            } else {
                convertView.setBackgroundResource(R.drawable.child_list_item);
            }
    
            return convertView;
        }
    
        public Map<Integer, Boolean> getIsSelectedMap() {
            return isSelectedMap;
        }
    
    }

    ListViewActivity.java

    package com.wangzhu.demoselector;
    
    import java.util.ArrayList;
    import java.util.HashMap;
    import java.util.List;
    import java.util.Map;
    
    import android.app.Activity;
    import android.os.Bundle;
    import android.os.Handler;
    import android.os.Message;
    import android.util.Log;
    import android.view.View;
    import android.view.View.OnClickListener;
    import android.widget.AdapterView;
    import android.widget.Button;
    import android.widget.CheckBox;
    import android.widget.ListView;
    import android.widget.TextView;
    
    public class ListViewActivity extends Activity implements OnClickListener {
    
        private final static String TAG = "ListViewActivity";
        private MyAdapter myAdapter;
        private ListView listView;
        private Button button1, button2, button3;
        private TextView totalTv;
    
        private List<Map<String, Object>> datas;
    
        private int count = 0;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.listview);
            init();
        }
    
        private void init() {
            getDatas();
    
            button1 = (Button) findViewById(R.id.button1);
            button1.setOnClickListener(this);
    
            button2 = (Button) findViewById(R.id.button2);
            button2.setOnClickListener(this);
    
            button3 = (Button) findViewById(R.id.button3);
            button3.setOnClickListener(this);
    
            totalTv = (TextView) findViewById(R.id.totalTv);
    
            myAdapter = new MyAdapter(getApplicationContext(), datas);
            listView = (ListView) findViewById(R.id.mylistview);
            listView.setAdapter(myAdapter);
            listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);// 多选模式
            // listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);// 单选模式
    
            listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
    
                @Override
                public void onItemClick(AdapterView<?> parent, View view,
                        int position, long id) {
                    Log.d(TAG,
                            "onItemClick======="
                                    + String.valueOf(datas.get(position).get(
                                            "title")) + " position=" + position
                                    + " id=" + id);
                    ViewHolder viewHolder = (ViewHolder) view.getTag();
                    CheckBox checkBox = viewHolder.checkBox;
                    final Map<Integer, Boolean> isSelectedMap = myAdapter
                            .getIsSelectedMap();
                    switch (listView.getChoiceMode()) {
                    case ListView.CHOICE_MODE_SINGLE:
                        if (!isSelectedMap.get(position)) {
                            checkBox.toggle();
                            isSelectedMap.put(position, true);
                        }
                        break;
                    case ListView.CHOICE_MODE_MULTIPLE:
                        checkBox.toggle();
                        if (checkBox.isChecked()) {
                            count++;
                        } else {
                            count--;
                        }
    
                        handler.sendEmptyMessage(0);
    
                        if (checkBox.isChecked()) {
                            view.setBackgroundResource(R.drawable.child_list_bg_1);
                        } else {
                            view.setBackgroundResource(R.drawable.child_list_item);
                        }
                        isSelectedMap.put(position, checkBox.isChecked());
                        break;
                    default:
                        break;
                    }
                }
            });
        }
    
        public void getDatas() {
            datas = new ArrayList<Map<String, Object>>();
            Map<String, Object> map = null;
            for (int i = 0; i < 20; i++) {
                map = new HashMap<String, Object>();
                map.put("title", "G" + i);
                map.put("info", "Google " + i);
                map.put("img", R.drawable.ic_launcher);
                datas.add(map);
            }
        }
    
        @Override
        public void onClick(View v) {
            switch (v.getId()) {
            case R.id.button1:
                allSelected();
                break;
            case R.id.button2:
                cancelSelected();
                break;
            case R.id.button3:
                ReverseSelection();
                break;
            default:
                break;
            }
        }
    
        /**
         * 全选
         */
        public void allSelected() {
            final Map<Integer, Boolean> isSelectedMap = myAdapter
                    .getIsSelectedMap();
            for (int i = 0, size = isSelectedMap.size(); i < size; i++) {
                if (!isSelectedMap.get(i)) {
                    count++;
                }
                isSelectedMap.put(i, true);
            }
            dataChanged();
        }
    
        /**
         * 取消
         */
        public void cancelSelected() {
            final Map<Integer, Boolean> isSelectedMap = myAdapter
                    .getIsSelectedMap();
            for (int i = 0, size = isSelectedMap.size(); i < size; i++) {
                if (isSelectedMap.get(i)) {
                    count--;
                }
                isSelectedMap.put(i, false);
            }
            dataChanged();
        }
    
        /**
         * 反选
         */
        public void ReverseSelection() {
            final Map<Integer, Boolean> isSelectedMap = myAdapter
                    .getIsSelectedMap();
            for (int i = 0, size = isSelectedMap.size(); i < size; i++) {
                // isSelectedMap.put(i, !isSelectedMap.get(i));
                if (isSelectedMap.get(i)) {
                    count--;
                    isSelectedMap.put(i, false);
                } else {
                    count++;
                    isSelectedMap.put(i, true);
                }
    
            }
            dataChanged();
        }
    
        public void dataChanged() {
            // 自定义的BaseAdapter中调用notifyDataSetChanged方法会重新调用BaseAdapter的getView方法
            myAdapter.notifyDataSetChanged();
            handler.sendEmptyMessage(0);
        }
    
        public Handler handler = new Handler() {
    
            @Override
            public void handleMessage(Message msg) {
                totalTv.setText("选中了" + count + "个");
            }
    
        };
    }

    以下是本次Demo中用到的图片:

     

     备注:欢迎各位大牛多多指教,谢谢!

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  • 原文地址:https://www.cnblogs.com/xiaoxian1369/p/3691926.html
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