ListView點擊或選中item改變背景

標籤：android   listview   selector   選中改變背景   點擊改變背景   

點擊或選中ListView中的一項後，使item背景改變，失去焦點同樣顯示選中的背景，重新選中另外一項才重新整理；

在Adapter中配置：

public class MyAdapter extends BaseAdapter{ int mSelect = 0;   //選中項     ...... public void changeSelected(int positon){ //重新整理方法     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);  //選中項背景        }else{         v.setBackgroundResource(R.drawable.bg);  //其他項背景        }                return v;    }}

 

配置好了之後，下面就是應用：

...........mAdapter = new MyAdapter(...);myList.setAdapter(mAdapter);//////////點擊監聽myList.setOnItemClickListener(new OnItemClickListener() {            @Override            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {                    mAdapter.changeSelected(position);//重新整理            }......}////////////////選中監聽myList.setOnItemSelectedListener(new OnItemSelectedListener() {            @Override            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {                                mAdapter.changeSelected(position);//重新整理            }......}

 

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監聽view獲得焦點或按下等狀態的背景，可以用selector；

    在res--drawable中配置樣式檔案，如button_style.xml

  

   <?xml version="1.0" encoding="utf-8"?><selector xmlns:android="http://schemas.android.com/apk/res/android">    <item android:state_pressed="true" android:drawable="@drawable/btn_bg_fc" /><!--按下時的背景-->    <item android:state_focused="true" android:drawable="@drawable/btn_bg_fc" /><!--獲得焦點時的背景-->    <item android:state_selected="true" android:drawable="@drawable/btn_bg_fc" /><!--選中狀態的背景-->    <item android:drawable="@drawable/btn_bg" /> <!--預設背景--></selector>

    用在Listview，gridview中

       <ListView

          ......
         android:listSelector="@drawable/button_style"

         ......> </ListView>

     用於其他View,如Button,textview等

         android:background="@drawable/button_style"

 

ListView點擊或選中item改變背景