首先,我的以为这种问题压根就不是问题,由于你将一个TextView的Backgroud设置成一个selector,也能够将一个TextView设计成一个按钮的样子。。。这样彻底能够绕过ListView和Button的冲突问题。。。。 android
非要解决的话,如下是一种解决方法: 数组
<?xml version="1.0" encoding="utf-8"?> |
由于继承了ListActivity,因此ListView 的id设置为"@id/android:list"是必须的 ide
注意: 函数
在<RelativeLayout>中 this
android:descendantFocusability="blocksDescendants" spa
和<ImageButton>中 .net
android:focusable="false" firefox
这两项的设置很关键,若是不设置,将致使ListView的ItemClick事件将没法触发,该事件被ImageButton的click事件屏蔽了。
设计
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在lvWithButtonExt中,为了能处理ImageButton的click事件,我继承了BaseAdapter类,并从新实现了getView()接口,在其中加入了Button的clicklistener,详见lvButtonAdapter类的实现。
public class lvWithButtonExt extends ListActivity { |
为了响应按钮的点击事件,首先要记录按钮的位置,而后为按钮设置clicklistener。
在从新实现的getView()接口中,我使用了lvButtonListener监听类,在构造函数中,记录行号,以便在OnClick接口中能准确的定位按钮所在的位置,进而对相应的行进行处理。
public class lvButtonAdapter extends BaseAdapter { private class buttonViewHolder { ImageView appIcon; TextView appName; ImageButton buttonClose; } private ArrayList<HashMap<String, Object>> mAppList; private LayoutInflater mInflater; private Context mContext; private String[] keyString; private int[] valueViewID; private buttonViewHolder holder; public lvButtonAdapter(Context c, ArrayList<HashMap<String, Object>> appList, int resource, String[] from, int[] to) { mAppList = appList; mContext = c; mInflater = (LayoutInflater)mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE); keyString = new String[from.length]; valueViewID = new int[to.length]; System.arraycopy(from, 0, keyString, 0, from.length); System.arraycopy(to, 0, valueViewID, 0, to.length); } @Override public int getCount() { return mAppList.size(); } @Override public Object getItem(int position) { return mAppList.get(position); } @Override public long getItemId(int position) { return position; } public void removeItem(int position){ mAppList.remove(position); this.notifyDataSetChanged(); } @Override public View getView(int position, View convertView, ViewGroup parent) { if (convertView != null) { holder = (buttonViewHolder) convertView.getTag(); } else { convertView = mInflater.inflate(R.layout.lvitem, null); holder = new buttonViewHolder(); holder.appIcon = (ImageView)convertView.findViewById(valueViewID[0]); holder.appName = (TextView)convertView.findViewById(valueViewID[1]); holder.buttonClose = (ImageButton)convertView.findViewById(valueViewID[2]); convertView.setTag(holder); } HashMap<String, Object> appInfo = mAppList.get(position); if (appInfo != null) { String aname = (String) appInfo.get(keyString[1]); int mid = (Integer)appInfo.get(keyString[0]); int bid = (Integer)appInfo.get(keyString[2]); holder.appName.setText(aname); holder.appIcon.setImageDrawable(holder.appIcon.getResources().getDrawable(mid)); holder.buttonClose.setImageDrawable(holder.buttonClose.getResources().getDrawable(bid)); holder.buttonClose.setOnClickListener(new lvButtonListener(position)); } return convertView; } class lvButtonListener implements OnClickListener { private int position; lvButtonListener(int pos) { position = pos; } @Override public void onClick(View v) { int vid=v.getId(); if (vid == holder.buttonClose.getId()) removeItem(position); } } } |