主函數<span style="font-family: Arial, Helvetica, sans-serif;">Activity的设置</span>
import java.util.ArrayList;import com.example.all_other.MyAdapter.ViewHolder;import android.os.Bundle;import android.app.Activity;import android.view.Menu;import android.view.View;import android.view.View.OnClickListener;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener;import android.widget.Button;import android.widget.ListView;import android.widget.TextView;public class MainActivity extends Activity {private ListView lv; private MyAdapter mAdapter; private ArrayList<String> list; private Button bt_selectall; private Button bt_cancel; private Button bt_deselectall; private int checkNum; // 记录选中的条目数量 private TextView tv_show;// 用于显示选中的条目数量 /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); /* 实例化各个控件 */ lv = (ListView) findViewById(R.id.lv); bt_selectall = (Button) findViewById(R.id.bt_selectall); bt_cancel = (Button) findViewById(R.id.bt_cancleselectall); bt_deselectall = (Button) findViewById(R.id.bt_deselectall); tv_show = (TextView) findViewById(R.id.tv); list = new ArrayList<String>(); // 为Adapter准备数据 initDate(); // 实例化自定义的MyAdapter mAdapter = new MyAdapter(list, this); // 绑定Adapter lv.setAdapter(mAdapter); // 全选按钮的回调接口 bt_selectall.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // 遍历list的长度，将MyAdapter中的map值全部设为true for (int i = 0; i < list.size(); i++) { MyAdapter.getIsSelected().put(i, true); } // 数量设为list的长度 checkNum = list.size(); // 刷新listview和TextView的显示 dataChanged(); } }); // 反选按钮的回调接口 bt_cancel.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // 遍历list的长度，将已选的设为未选，未选的设为已选 for (int i = 0; i < list.size(); i++) { if (MyAdapter.getIsSelected().get(i)) { MyAdapter.getIsSelected().put(i, false); checkNum--; } else { MyAdapter.getIsSelected().put(i, true); checkNum++; } } // 刷新listview和TextView的显示 dataChanged(); } }); // 取消按钮的回调接口 bt_deselectall.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // 遍历list的长度，将已选的按钮设为未选 for (int i = 0; i < list.size(); i++) { if (MyAdapter.getIsSelected().get(i)) { MyAdapter.getIsSelected().put(i, false); checkNum--;// 数量减1 } } // 刷新listview和TextView的显示 dataChanged(); } }); // 绑定listView的监听器 lv.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) { // 取得ViewHolder对象，这样就省去了通过层层的findViewById去实例化我们需要的cb实例的步骤 ViewHolder holder = (ViewHolder) arg1.getTag(); // 改变CheckBox的状态 holder.cb.toggle(); // 将CheckBox的选中状况记录下来 MyAdapter.getIsSelected().put(arg2, holder.cb.isChecked()); // 调整选定条目 if (holder.cb.isChecked() == true) { checkNum++; } else { checkNum--; } // 用TextView显示 tv_show.setText("已选中" + checkNum + "项"); } }); } // 初始化数据 private void initDate() { for (int i = 0; i < 15; i++) { list.add("data" + " " + i); } ; } // 刷新listview和TextView的显示 private void dataChanged() { // 通知listView刷新 mAdapter.notifyDataSetChanged(); // TextView显示最新的选中数目 tv_show.setText("已选中" + checkNum + "项"); }; }
适配器Adapter
import java.util.ArrayList; import java.util.HashMap; 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.TextView; public class MyAdapter extends BaseAdapter { // 填充数据的list private ArrayList<String> list; // 用来控制CheckBox的选中状况 private static HashMap<Integer, Boolean> isSelected; // 上下文 private Context context; // 用来导入布局 private LayoutInflater inflater = null; // 构造器 public MyAdapter(ArrayList<String> list, Context context) { this.context = context; this.list = list; inflater = LayoutInflater.from(context); isSelected = new HashMap<Integer, Boolean>(); // 初始化数据 initDate(); } // 初始化isSelected的数据 private void initDate() { for (int i = 0; i < list.size(); i++) { getIsSelected().put(i, false); } } @Override public int getCount() { return list.size(); } @Override public Object getItem(int position) { return list.get(position); } @Override public long getItemId(int position) { return position; } @Override public View getView(int position, View convertView, ViewGroup parent) { ViewHolder holder = null; if (convertView == null) { // 获得ViewHolder对象 holder = new ViewHolder(); // 导入布局并赋值给convertview convertView = inflater.inflate(R.layout.listviewitem, null); holder.tv = (TextView) convertView.findViewById(R.id.item_tv); holder.cb = (CheckBox) convertView.findViewById(R.id.item_cb); // 为view设置标签 convertView.setTag(holder); } else { // 取出holder holder = (ViewHolder) convertView.getTag(); } // 设置list中TextView的显示 holder.tv.setText(list.get(position)); // 根据isSelected来设置checkbox的选中状况 holder.cb.setChecked(getIsSelected().get(position)); return convertView; } public static HashMap<Integer, Boolean> getIsSelected() { return isSelected; } public static void setIsSelected(HashMap<Integer, Boolean> isSelected) { MyAdapter.isSelected = isSelected; } public static class ViewHolder { TextView tv; CheckBox cb; } }
主函数界面的布局
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="horizontal" > <TextView android:id="@+id/tv" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_gravity="center_vertical" /> <LinearLayout android:id="@+id/line" android:layout_width="fill_parent" android:layout_height="50dp" android:layout_below="@+id/tv" android:orientation="horizontal" > <Button android:id="@+id/bt_selectall" android:layout_width="80dp" android:layout_height="fill_parent" android:text="全选" /> <Button android:id="@+id/bt_cancleselectall" android:layout_width="80dp" android:layout_height="fill_parent" android:text="反选" /> <Button android:id="@+id/bt_deselectall" android:layout_width="80dp" android:layout_height="fill_parent" android:text="取消选择" /> </LinearLayout> <ListView android:id="@+id/lv" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_below="@+id/line" /> </RelativeLayout>
适i配器界面listview_ltem
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="/apk/res/android"android:layout_width="fill_parent"android:layout_height="fill_parent"android:orientation="horizontal" ><TextViewandroid:id="@+id/item_tv"android:layout_width="0dp"android:layout_height="wrap_content"android:layout_gravity="center_vertical"android:layout_weight="1" /><CheckBoxandroid:id="@+id/item_cb"android:layout_width="wrap_content"android:layout_height="wrap_content"android:clickable="false"android:focusable="false"android:focusableInTouchMode="false"android:gravity="center_vertical" /></LinearLayout>
listview_ltem中的一些属性说明====================================================可点击的android:clickable="false"可聚焦的 android:focusable="false"就是可以通过touch来获得focus(聚焦)android:focusableInTouchMode="false"
