我创建了一个包含复选框和搜索功能的列表视图。搜索工作正常，复选框也显示。 现在我想要的是，我想要点击一个按钮来获取所有已检查列表项的名称。我还想知道如何显示另一个textview，比如项目名称下的价格。
主要布局：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<!-- Editext for Search -->
<EditText
android:id="@+id/inputSearch"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:hint="Search products.."
android:inputType="textVisiblePassword" />
<ListView
android:id="@+id/mainListView"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1" >
</ListView>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginTop="5dp"
android:onClick="showResult"
android:text="Show Result" >
</Button>
</LinearLayout>
simplerow.xml 文件：
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView android:id="@+id/rowTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="10dp"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textStyle="bold"
android:textSize="16sp" >
</TextView>
<CheckBox android:id="@+id/CheckBox01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="10dp"
android:layout_alignParentRight="true" android:layout_marginRight="6sp"
android:focusable="false">
</CheckBox>
</RelativeLayout>
活动：
public class MultiSelectList extends Activity {
// Search EditText
EditText inputSearch;
private ListView mainListView;
private mItems[] itemss;
private ArrayAdapter<mItems> listAdapter;
ArrayList<String> checked = new ArrayList<String>();
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// Find the ListView resource.
mainListView = (ListView) findViewById(R.id.mainListView);
inputSearch = (EditText) findViewById(R.id.inputSearch);
// When item is tapped, toggle checked properties of CheckBox and
// Planet.
mainListView
.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View item,
int position, long id) {
mItems planet = listAdapter.getItem(position);
planet.toggleChecked();
SelectViewHolder viewHolder = (SelectViewHolder) item
.getTag();
viewHolder.getCheckBox().setChecked(planet.isChecked());
}
});
// Create and populate planets.
itemss = (mItems[]) getLastNonConfigurationInstance();
ArrayList<mItems> planetList = new ArrayList<mItems>();
planetList.add(new mItems("DJ- Android"));
planetList.add(new mItems("Android"));
planetList.add(new mItems("iPhone"));
planetList.add(new mItems("BlackBerry"));
planetList.add(new mItems("Java"));
planetList.add(new mItems("PHP"));
planetList.add(new mItems(".Net"));
planetList.add(new mItems("Jhoomla"));
// Set our custom array adapter as the ListView's adapter.
listAdapter = new SelectArralAdapter(this, planetList);
mainListView.setAdapter(listAdapter);
/**
* Enabling Search Filter
* */
inputSearch.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence cs, int arg1, int arg2, int arg3) {
// When user changed the Text
MultiSelectList.this.listAdapter.getFilter().filter(cs);
}
@Override
public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,
int arg3) {
// TODO Auto-generated method stub
}
@Override
public void afterTextChanged(Editable arg0) {
// TODO Auto-generated method stub
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// TODO Auto-generated method stub
menu.add(0, 1, Menu.NONE, "Products");
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// TODO Auto-generated method stub
switch (item.getItemId()) {
case 1:
for (int i = 0; i < checked.size(); i++) {
Log.d("pos : ", "" + checked.get(i));
}
break;
}
return super.onOptionsItemSelected(item);
}
/** Holds planet data. */
private static class mItems {
private String name = "";
private boolean checked = false;
public mItems() {
}
public mItems(String name) {
this.name = name;
}
public mItems(String name, boolean checked) {
this.name = name;
this.checked = checked;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public boolean isChecked() {
return checked;
}
public void setChecked(boolean checked) {
this.checked = checked;
}
public String toString() {
return name;
}
public void toggleChecked() {
checked = !checked;
}
}
/** Holds child views for one row. */
private static class SelectViewHolder {
private CheckBox checkBox;
private TextView textView;
public SelectViewHolder() {
}
public SelectViewHolder(TextView textView, CheckBox checkBox) {
this.checkBox = checkBox;
this.textView = textView;
}
public CheckBox getCheckBox() {
return checkBox;
}
public void setCheckBox(CheckBox checkBox) {
this.checkBox = checkBox;
}
public TextView getTextView() {
return textView;
}
public void setTextView(TextView textView) {
this.textView = textView;
}
}
/** Custom adapter for displaying an array of Planet objects. */
private static class SelectArralAdapter extends ArrayAdapter<mItems> {
private LayoutInflater inflater;
public SelectArralAdapter(Context context, List<mItems> planetList) {
super(context, R.layout.simplerow, R.id.rowTextView, planetList);
// Cache the LayoutInflate to avoid asking for a new one each time.
inflater = LayoutInflater.from(context);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// Planet to display
mItems planet = (mItems) this.getItem(position);
// The child views in each row.
CheckBox checkBox;
TextView textView;
// Create a new row view
if (convertView == null) {
convertView = inflater.inflate(R.layout.simplerow, null);
// Find the child views.
textView = (TextView) convertView
.findViewById(R.id.rowTextView);
checkBox = (CheckBox) convertView.findViewById(R.id.CheckBox01);
// Optimization: Tag the row with it's child views, so we don't
// have to
// call findViewById() later when we reuse the row.
convertView.setTag(new SelectViewHolder(textView, checkBox));
// If CheckBox is toggled, update the planet it is tagged with.
checkBox.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
CheckBox cb = (CheckBox) v;
mItems planet = (mItems) cb.getTag();
planet.setChecked(cb.isChecked());
}
});
}
// Reuse existing row view
else {
// Because we use a ViewHolder, we avoid having to call
// findViewById().
SelectViewHolder viewHolder = (SelectViewHolder) convertView
.getTag();
checkBox = viewHolder.getCheckBox();
textView = viewHolder.getTextView();
}
// Tag the CheckBox with the Planet it is displaying, so that we can
// access the planet in onClick() when the CheckBox is toggled.
checkBox.setTag(planet);
// Display planet data
checkBox.setChecked(planet.isChecked());
textView.setText(planet.getName());
return convertView;
}
}
public Object onRetainNonConfigurationInstance() {
return itemss;
}
}
我该怎么做才能获得理想的结果？
答案 0 :(得分：1)
您应该在自定义适配器中保留checbox的状态，并使用某些ArrayList或SparseArray。然后，当您想要获取所有检查项的名称时，您只需遍历数组并读取其中checked参数为true的名称。当然，当复选框状态发生变化时，应该更新列表。
这是唯一正确的解决方案，因为屏幕上只有少数ListView项目是可见的，因此尝试即时阅读其属性是不可靠的 - 任何时刻项目都可能被回收，因此无法访问。
答案 1 :(得分：1)
现在我想要的是，我想获取所有选中列表的名称 项目点击按钮。
为什么不迭代itemss数组并获取checked字段为true的项目？
我也想知道如何展示另一个文本视图， 说项目名称以下的价格。
更新您的simplerow.xml（加价TextView）以及SelectViewHolder和SelectArralAdapter。
我想这些代码应该不是很难。