android listview选中某一行，成选中状态颜色高亮显示_doudouhe

http://blog.sina.com.cn/u/1246732213

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android listview选中某一行，成选中状态颜色高亮显示

(2011-11-13 12:45:32)

标签：

杂谈

分类： android

构造自己的adapter，在getView中，设置颜色，点击item，刷新listview。

代码：

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import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import android.app.Activity;
import android.content.Context;
import android.graphics.Color;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView;
public class MyListView4 extends Activity {
    private List<Map<String, Object>> mData;
    ListView setlistViewLeft;
    MyAdapter adapter;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.list);

        mData = getData();
        setlistViewLeft = (ListView)findViewById(R.id.listleft);

        adapter = new MyAdapter(this);
        setlistViewLeft.setAdapter(adapter);
        setlistViewLeft.setOnItemClickListener(mLeftListOnItemClick);
    }
    private List<Map<String, Object>> getData() {
        List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
        Map<String, Object> map = new HashMap<String, Object>();
        map.put("title", "G1");
        map.put("info", "google 1");
        list.add(map);
        map = new HashMap<String, Object>();
        map.put("title", "G2");
        map.put("info", "google 2");
        list.add(map);
        map = new HashMap<String, Object>();
        map.put("title", "G3");
        map.put("info", "google 3");
        list.add(map);

        map = new HashMap<String, Object>();
        map.put("title", "G4");
        map.put("info", "google 4");
        list.add(map);

        map = new HashMap<String, Object>();
        map.put("title", "G5");
        map.put("info", "google 5");
        list.add(map);
        return list;
    }
    AdapterView.OnItemClickListener mLeftListOnItemClick = new AdapterView.OnItemClickListener() {
        public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,long arg3) {

            adapter.setSelectItem(arg2);
            adapter.notifyDataSetInvalidated();
//          adapter.notifyDataSetChanged();
        }

    };

    public final class ViewHolder {
        public TextView titleText;
        public TextView infoText;
    }
    public class MyAdapter extends BaseAdapter {
        private LayoutInflater mInflater;
        public MyAdapter(Context context) {
            this.mInflater = LayoutInflater.from(context);
        }
        public int getCount() {
            // TODO Auto-generated method stub
            return mData.size();
        }
        public Object getItem(int arg0) {
            // TODO Auto-generated method stub
            return mData.get(arg0);
        }
        public long getItemId(int arg0) {
            // TODO Auto-generated method stub
            return arg0;
        }
        public View getView(int position, View convertView, ViewGroup parent) {
            ViewHolder holder = null;
            if (convertView == null) {
                holder = new ViewHolder();
                convertView = mInflater.inflate(R.layout.leftview, null);
                holder.titleText = (TextView) convertView.findViewById(R.id.titleleftlist);
                holder.infoText = (TextView) convertView.findViewById(R.id.infoleftlist);

                convertView.setTag(holder);
            } else {
                holder = (ViewHolder) convertView.getTag();
            }

            holder.titleText.setText((String) mData.get(position).get("title"));
            holder.infoText.setText((String) mData.get(position).get("info"));

            if (position == selectItem) {
                convertView.setBackgroundColor(Color.RED);
            }
            else {
                convertView.setBackgroundColor(Color.TRANSPARENT);
            }

            //convertView.getBackground().setAlpha(80);

            return convertView;
        }
        public void setSelectItem(int selectItem) {
             this.selectItem = selectItem;
        }
        private int selectItem=-1;
    }
}
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import android.app.Activity;
import android.content.Context;
import android.graphics.Color;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView;
public class MyListView4 extends Activity {
private List<Map<String, Object>> mData;
ListView setlistViewLeft;
MyAdapter adapter;

@Override
public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.list);

  mData = getData();
  setlistViewLeft = (ListView)findViewById(R.id.listleft);

  adapter = new MyAdapter(this);
  setlistViewLeft.setAdapter(adapter);
  setlistViewLeft.setOnItemClickListener(mLeftListOnItemClick);
}
private List<Map<String, Object>> getData() {
  List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
  Map<String, Object> map = new HashMap<String, Object>();
  map.put("title", "G1");
  map.put("info", "google 1");
  list.add(map);
  map = new HashMap<String, Object>();
  map.put("title", "G2");
  map.put("info", "google 2");
  list.add(map);
  map = new HashMap<String, Object>();
  map.put("title", "G3");
  map.put("info", "google 3");
  list.add(map);

  map = new HashMap<String, Object>();
  map.put("title", "G4");
  map.put("info", "google 4");
  list.add(map);

  map = new HashMap<String, Object>();
  map.put("title", "G5");
  map.put("info", "google 5");
  list.add(map);
  return list;
}
AdapterView.OnItemClickListener mLeftListOnItemClick = new AdapterView.OnItemClickListener() {
  public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,long arg3) {

   adapter.setSelectItem(arg2);
   adapter.notifyDataSetInvalidated();
//   adapter.notifyDataSetChanged();
  }

};

public final class ViewHolder {
  public TextView titleText;
  public TextView infoText;
}
public class MyAdapter extends BaseAdapter {
  private LayoutInflater mInflater;
  public MyAdapter(Context context) {
   this.mInflater = LayoutInflater.from(context);
  }
  public int getCount() {
   // TODO Auto-generated method stub
   return mData.size();
  }
  public Object getItem(int arg0) {
   // TODO Auto-generated method stub
   return mData.get(arg0);
  }
  public long getItemId(int arg0) {
   // TODO Auto-generated method stub
   return arg0;
  }
  public View getView(int position, View convertView, ViewGroup parent) {
   ViewHolder holder = null;
   if (convertView == null) {
    holder = new ViewHolder();
    convertView = mInflater.inflate(R.layout.leftview, null);
    holder.titleText = (TextView) convertView.findViewById(R.id.titleleftlist);
    holder.infoText = (TextView) convertView.findViewById(R.id.infoleftlist);

    convertView.setTag(holder);
   } else {
    holder = (ViewHolder) convertView.getTag();
   }

   holder.titleText.setText((String) mData.get(position).get("title"));
   holder.infoText.setText((String) mData.get(position).get("info"));

   if (position == selectItem) {
    convertView.setBackgroundColor(Color.RED);
   }
   else {
    convertView.setBackgroundColor(Color.TRANSPARENT);
   }

   //convertView.getBackground().setAlpha(80);

   return convertView;
  }
  public void setSelectItem(int selectItem) {
    this.selectItem = selectItem;
  }
  private int selectItem=-1;
}
}

android 自定义adapter extends BaseAdapter，做有自己布局的listView
或：

siteListView.setOnItemClickListener(new OnItemClickListener() {
   @Override
    public void onItemClick(AdapterView<?> parent, View view,int position, long id) {
        for(int i=0;i<parent.getCount();i++){
            View v=parent.getChildAt(parent.getCount()-1-i);
            if (position == i) {
                v.setBackgroundColor(Color.RED);
            } else {
                v.setBackgroundColor(Color.TRANSPARENT);
            }
        }
    }
});

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