android中实现带图片和checkbox的listview,
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android中实现带图片和checkbox的listview,
android:layout_weight="1"这一句可以使中间的textview权重增大,从而后面的checkbok可以居右显示。android:focusable="false"
android:focusableInTouchMode="false"
android:clickable="false"
这三句很重要,如果不加就会出现错误。
由于checkbox的点击事件优先级比listview的高,所以要在checkbox中添加android:focusable="false",使得checkbox初始的时候没有获取焦点。
接下来在main.xml中添加Listview组件
1.MyAdapter.java
package com.zwq.umeng; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import android.content.Context; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.CheckBox; import android.widget.ImageView; import android.widget.TextView; public class MyAdapter extends BaseAdapter { private LayoutInflater mInflater; private List<Map<String, Object>> mData; public static Map<Integer, Boolean> isSelected; public MyAdapter(Context context) { mInflater = LayoutInflater.from(context); init(); } //初始化 private void init() { mData=new ArrayList<Map<String, Object>>(); for (int i = 0; i < 5; i++) { Map<String, Object> map = new HashMap<String, Object>(); map.put("img", R.drawable.icon); map.put("title", "第" + (i + 1) + "行的标题"); mData.add(map); } //这儿定义isSelected这个map是记录每个listitem的状态,初始状态全部为false。 isSelected = new HashMap<Integer, Boolean>(); for (int i = 0; i < mData.size(); i++) { isSelected.put(i, false); } } @Override public int getCount() { return mData.size(); } @Override public Object getItem(int position) { return null; } @Override public long getItemId(int position) { return 0; } @Override public View getView(int position, View convertView, ViewGroup parent) { ViewHolder holder = null; //convertView为null的时候初始化convertView。 if (convertView == null) { holder = new ViewHolder(); convertView = mInflater.inflate(R.layout.vlist, null); holder.img = (ImageView) convertView.findViewById(R.id.img); holder.title = (TextView) convertView.findViewById(R.id.title); holder.cBox = (CheckBox) convertView.findViewById(R.id.cb); convertView.setTag(holder); } else { holder = (ViewHolder) convertView.getTag(); } holder.img.setBackgroundResource((Integer) mData.get(position).get( "img")); holder.title.setText(mData.get(position).get("title").toString()); holder.cBox.setChecked(isSelected.get(position)); return convertView; } public final class ViewHolder { public ImageView img; public TextView title; public CheckBox cBox; } }
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