触碰模式下的listview的选中项背景高亮

package org.yaoming.listview; import org.yaoming.util.Common; import android.app.Activity; import android.content.Context; import android.content.SharedPreferences; import android.os.Bundle; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.BaseAdapter; import android.widget.ImageView; import android.widget.LinearLayout; import android.widget.ListView; import android.widget.TextView; public class Listview_selectorActivity extends Activity implements OnItemClickListener { private String[] arrays; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); arrays = new String[] {"a","b","c","d","e"}; //使用SharedPreferences是为了每次点击退出时都保存之前选中的项，以后一打开时就可以看到以前的选择 SharedPreferences sp = getSharedPreferences("testListview", 0); Common.SELECTED = sp.getInt("selected", Common.SELECTED); ListView listview = (ListView) findViewById(R.id.listView1); listview.setAdapter(new MyAdapter(this)); listview.setOnItemClickListener(this); } public class MyAdapter extends BaseAdapter{ Context context; public class ViewHolder{ TextView tv; ImageView iv; } public MyAdapter(Context context){ this.context = context; } @Override public int getCount() { // TODO Auto-generated method stub return arrays.length; } @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(int position, View convertView, ViewGroup parent) { //通过日志测试，原来每次点击listview的每一项，这里都会运行 //通过查看源码，原来是getItemAtPosition()中getAdapter()搞的鬼 Log.i("listview", "zhixingguo "); LinearLayout layout; ViewHolder viewholder; if(null == convertView){ layout = (LinearLayout) LayoutInflater.from(context).inflate(R.layout.item, null); viewholder = new ViewHolder(); viewholder.tv = (TextView) layout.findViewById(R.id.textView2); viewholder.iv = (ImageView) layout.findViewById(R.id.imageView1); convertView = layout; layout.setTag(viewholder); }else{ layout = (LinearLayout) convertView; viewholder = (ViewHolder) layout.getTag(); } viewholder.tv.setText(arrays[position]); //在这里加个判断，若为选中项，则改变背景图片和背景色 if(Common.SELECTED == position){ viewholder.iv.setBackgroundResource(R.drawable.asi); layout.setBackgroundResource(R.color.blue); }else { viewholder.iv.setBackgroundResource(R.drawable.icon); layout.setBackgroundResource(R.color.transparent); } return convertView; } } @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { //如果在这里简单地通过findviewbyid()改变背景图片，点击时会出现图片乱显示的情况 // ImageView iv = (ImageView) view.findViewById(R.id.imageView1); // iv.setImageResource(R.drawable.asi); //改变SELECTED的值，并在getview里判断加载的位置是否为选中的位置 Common.SELECTED = position; } }