不管按哪个按钮，上一次老是获取到position的第一个值，显示"苹果"，然后按照网上的解决办法改了之后，老是获取到position的最后一个值，显示"运行"
package com.example.exer;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import android.app.AlertDialog;
import android.app.ListActivity;
import android.content.Context;
import android.content.DialogInterface;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends ListActivity {
private static final String TAG = "MainActivity";
private List<Map<String, Object>> mdata;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//setContentView(R.layout.activity_main);
ListView mListView=getListView();
mdata = data();
mListView.setAdapter(new MyAdapter(this,mdata));
mListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> l, View v, int position, long id) {
Log.i(TAG, (String)mdata.get(position).get("title"));
Toast.makeText(MainActivity.this, (String)mdata.get(position).get("title"), 1000).show();
}
});
}
class MyAdapter extends BaseAdapter{
private Context context;
Hodler hodler =null;
private LayoutInflater minflater;
private ArrayList<Map<String,Object>> datalist;
public MyAdapter(Context context,List<Map<String,Object>> datalist) {
this.context=context;
this.minflater = LayoutInflater.from(context);
this.datalist=(ArrayList<Map<String,Object>>)datalist;
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return datalist.size();
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return datalist.get(position);
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if(convertView == null){
hodler = new Hodler();
convertView= minflater.inflate(R.layout.mylist, null);
hodler.img = (ImageView) convertView.findViewById(R.id.img);
hodler.title = (TextView) convertView.findViewById(R.id.title);
hodler.info = (TextView) convertView.findViewById(R.id.info);
hodler.button = (Button) convertView.findViewById(R.id.button);
convertView.setTag(hodler);
}else{
hodler = (Hodler)convertView.getTag();
}
hodler.img.setBackgroundResource((Integer) mdata.get(position).get("img"));
hodler.title.setText((CharSequence) mdata.get(position).get("title"));
hodler.info.setText((CharSequence) mdata.get(position).get("info"));
//hodler.button.setTag(position);
hodler.positio=position;
hodler.button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//showdialog((int)hodler.button.getTag());
showdialog(hodler.positio);
}
});
return convertView;
}
class Hodler {
public ImageView img;
public TextView title;
public TextView info;
public Button button;
int positio;//增加一个变量记录每个item的值
}
}
public void showdialog(int position) {
new AlertDialog.Builder(this).setTitle("提示信息").setMessage("你点击的标题是: " +(String)mdata.get(position).get("title"))
.setPositiveButton("确定", new DialogInterface.OnClickListener(){
@Override
public void onClick(DialogInterface dialog, int which) {
Toast.makeText(MainActivity.this, "确定", Toast.LENGTH_SHORT).show();
setResult(RESULT_OK);
finish();
}
}).setNegativeButton("取消", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
}).show();
}
public List<Map<String, Object>> data() {
List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
Map<String, Object> map = new HashMap<String, Object>();
map.put("title", "苹果");
map.put("info", "apple");
map.put("img", R.drawable.ic_launcher);
list.add(map);
map = new HashMap<String, Object>();
map.put("title", "书");
map.put("info", "book");
map.put("img", R.drawable.ic_launcher);
list.add(map);
map = new HashMap<String, Object>();
map.put("title", "电脑");
map.put("info", "computer");
map.put("img", R.drawable.ic_launcher);
list.add(map);
map = new HashMap<String, Object>();
map.put("title", "对话");
map.put("info", "dialog");
map.put("img", R.drawable.ic_launcher);
list.add(map);
map = new HashMap<String, Object>();
map.put("title", "运行");
map.put("info", "run");
map.put("img", R.drawable.ic_launcher);
list.add(map);
return list;
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
