点击或选中ListView中的一项后。使item背景改变，失去焦点相同显示选中的背景。又一次选中另外一项才刷新；

在Adapter中配置：

public class MyAdapter extends BaseAdapter{ int mSelect = 0;   //选中项     ...... public void changeSelected(int positon){ //刷新方法     if(positon != mSelect){      mSelect = positon;     notifyDataSetChanged();     }    }public View getView(int position, View convertView, ViewGroup parent) {//     if(convertView==null){        LayoutInflater factory = LayoutInflater.from(context);        View v = (View) factory.inflate(R.layout.list_item, null);        TextView tv = (TextView) v.findViewById(R.id.Item_tv);        tv.setText("test");//     }        if(mSelect==position){             v.setBackgroundResource(R.drawable.fc_bg);  //选中项背景        }else{         v.setBackgroundResource(R.drawable.bg);  //其它项背景        }                return v;    }}

 

配置好了之后，以下就是应用：

...........mAdapter = new MyAdapter(...);myList.setAdapter(mAdapter);//点击监听myList.setOnItemClickListener(new OnItemClickListener() {            @Override            public void onItemClick(AdapterView
      parent, View view, int position, long id) {                    mAdapter.changeSelected(position);//刷新            }......}选中监听myList.setOnItemSelectedListener(new OnItemSelectedListener() {            @Override            public void onItemSelected(AdapterView
      parent, View view, int position, long id) {                                mAdapter.changeSelected(position);//刷新            }......}

 

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监听view获得焦点或按下等状态的背景，能够用selector。

    在res--drawable中配置样式文件，如button_style.xml

  

> <selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:state_pressed="true" android:drawable="@drawable/btn_bg_fc" /><!--按下时的背景--> <item android:state_focused="true" android:drawable="@drawable/btn_bg_fc" /><!--获得焦点时的背景--> <item android:state_selected="true" android:drawable="@drawable/btn_bg_fc" /><!--选中状态的背景--> <item android:drawable="@drawable/btn_bg" /> <!--默认背景--> </selector>

    用在Listview，gridview中

       <ListView

          ......

         android:listSelector="@drawable/button_style"

         ......> </ListView>

     用于其它View,如Button,textview等

         android:background="@drawable/button_style"