我已经浏览过互联网并且必须遗漏一些东西。我的任务看起来很简单，我找到了一些其他的帖子，但我还没有能够让我的工作。以下是我的代码（对不起，我是java和android的新手，所以如果我做了一些不是最佳实践的事情，我道歉。）无论如何我的情况，
我有一个listView，它填充了数据库中的一些文本字段，在这些文本框的右侧我创建了一个删除按钮，并希望在按下相应的删除按钮时删除该记录（行） 。我已成功为我的按钮创建了一个OnClickListener，但无法获得列表视图中单击该按钮的位置。
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TextView TextView | Delete Button
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TextView TextView | Delete Button
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代码：
public class CalcCursorAdapter extends SimpleCursorAdapter implements Filterable{
private Context mContext;
private ListView mListView;
private int mLayout;
protected static class ViewHolder {
protected TextView text;
protected ImageButton button;
private int position;
}
@SuppressWarnings("deprecation")
public CalcCursorAdapter(Context context, int layout, Cursor c, String[] from, int[] to)
{
super(context, layout, c, from, to);
this.mContext = context;
this.mLayout = layout;
//mListView = .getListView();
}
@Override
public void bindView(View view, Context context, Cursor cursor) {
TextView summary = (TextView)view.findViewById(R.id.calctvPrice);
TextView savings = (TextView)view.findViewById(R.id.calctvSavings);
summary.setText(cursor.getString(cursor.getColumnIndexOrThrow("qcFinalPrice")));
savings.setText(cursor.getString(cursor.getColumnIndexOrThrow("qcSavings")));
}
@Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
ViewHolder holder = new ViewHolder();
LayoutInflater inflater = LayoutInflater.from(context);
View v = inflater.inflate(R.layout.calc_list_item, parent, false);
holder.button = (ImageButton) v.findViewById(R.id.qcbtnDelete);
holder.button.setOnClickListener(deleteButton);
bindView(v, context, cursor);
v.setTag(holder);
return v;
}
private OnClickListener deleteButton = new OnClickListener() {
public void onClick(View v){
Toast.makeText(mContext.getApplicationContext(), "test", Toast.LENGTH_SHORT).show();
}
};
public long qcItemId(int position) {
return position;
}
}
我已经查看了许多示例以及它们看起来对于数组适配器的很多时间，我发现的另一件事是有些人会覆盖getView函数，我觉得你可以执行所述任务没有这样做。此外，我不希望列表项iteslef是可点击的，只是按钮...它似乎应该是一个如此简单的问题，但我一直在寻找...我很抱歉，如果这被覆盖在某处，我有只是错过了，我花了最后4个小时搜索网页试图找到一个解决方案！
无论如何，非常感谢任何帮助！
谢谢。
答案 0 :(得分：2)
玛拉基的链接指向正确的方向。只剩下一个小小的细节。 Cursor有一个方法getPosition（），它返回行集中光标的位置。 将该值存储在ViewHolder中并且您已完成设置：
holder.position = c.getPosition();
在OnClickListener中检索ViewHolder及其包含的位置：
ViewHolder holder = (ViewHolder) v.getTag();
int position = holder.position;
该职位可用于检索基础数据：
Object myData = getItem(position);
答案 1 :(得分：0)
要在列表中只能点击按钮，只需在ListView_row.xml中设置按钮android:focusable="false"和android:focusableInTouchMode="false"的属性。
现在，您可以为Button和Listview分隔点击事件。
此外，调用getView（）是在其中进行自定义时构建listview的最佳实践。查看this视频教程。我真的相信你永远不会忘记你会从本教程中学习。
这是我从列表视图中删除多个项目的方法，不同之处在于我没有删除列表中的任何项目，而是从数据库中删除与之相关的记录，而我使用的是imageview，而不是按钮。至少你可以知道如何做到这一点：
public class DeleteData extends Activity {
Cursor cursor;
ListView lv_delete_data;
static ArrayList<Integer> listOfItemsToDelete;
SQLiteDatabase database;
private Category[] categories;
ArrayList<Category> categoryList;
private ArrayAdapter<Category> listAdapter;
ImageView iv_delete;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_delete_data);
this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
manage_reload_list();
listOfItemsToDelete = new ArrayList<Integer>();
iv_delete = (ImageView) findViewById(R.id.imageViewDeleteDataDelete);
iv_delete.setClickable(true);
iv_delete.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (listOfItemsToDelete.isEmpty()) {
Toast.makeText(getBaseContext(), "No items selected.",
Toast.LENGTH_SHORT).show();
}
else {
showDialog(
"Warning",
"Are you sure you want to delete these categories ? This will erase all records attached with it.");
}
}
});
lv_delete_data = (ListView) findViewById(R.id.listViewDeleteData);
lv_delete_data.setAdapter(listAdapter);
lv_delete_data.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
// TODO Auto-generated method stub
ImageView imageView = (ImageView) arg1
.findViewById(R.id.imageViewSingleRowDeleteData);
Category category = (Category) imageView.getTag();
if (category.getChecked() == false) {
imageView.setImageResource(R.drawable.set_check);
listOfItemsToDelete.add(category.getId());
category.setChecked(true);
} else {
imageView.setImageResource(R.drawable.set_basecircle);
listOfItemsToDelete.remove((Integer) category.getId());
category.setChecked(false);
}
}
});
}
private void showDialog(final String title, String message) {
AlertDialog.Builder adb = new Builder(DeleteData.this);
adb.setTitle(title);
adb.setMessage(message);
adb.setIcon(R.drawable.ic_launcher);
String btn = "Ok";
if (title.equals("Warning")) {
btn = "Yes";
adb.setNegativeButton("No", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
}
adb.setPositiveButton(btn, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface arg0, int arg1) {
if (title.equals("Warning")) {
for (int i : listOfItemsToDelete) {
// -------first delete from category table-----
database.delete("category_fields", "cat_id=?",
new String[] { i + "" });
// --------now fetch rec_id where cat_id =
// i-----------------
cursor = database.query("records_data",
new String[] { "rec_id" }, "cat_id=?",
new String[] { i + "" }, null, null, null);
if (cursor.getCount() == 0)
cursor.close();
else {
ArrayList<Integer> al_tmp_rec_id = new ArrayList<Integer>();
while (cursor.moveToNext())
al_tmp_rec_id.add(cursor.getInt(0));
cursor.close();
for (int i1 : al_tmp_rec_id) {
database.delete("records_fields_data",
"rec_id=?", new String[] { i1 + "" });
database.delete("record_tag_relation",
"rec_id=?", new String[] { i1 + "" });
}
// ---------delete from records_data-------
database.delete("records_data", "cat_id=?",
new String[] { i + "" });
cursor.close();
}
}
showDialog("Success",
"Categories, with their records, deleted successfully.");
} else {
database.close();
listOfItemsToDelete.clear();
manage_reload_list();
lv_delete_data.setAdapter(listAdapter);
}
}
});
AlertDialog ad = adb.create();
ad.show();
}
protected void manage_reload_list() {
loadDatabase();
categoryList = new ArrayList<Category>();
// ------first fetch all categories name list-------
cursor = database.query("category", new String[] { "cat_id",
"cat_description" }, null, null, null, null, null);
if (cursor.getCount() == 0) {
Toast.makeText(getBaseContext(), "No categories found.",
Toast.LENGTH_SHORT).show();
cursor.close();
} else {
while (cursor.moveToNext()) {
categories = new Category[] { new Category(cursor.getInt(0),
cursor.getString(1)) };
categoryList.addAll(Arrays.asList(categories));
}
cursor.close();
}
listAdapter = new CategoryArrayAdapter(this, categoryList);
}
static class Category {
String cat_name = "";
int cat_id = 0;
Boolean checked = false;
Category(int cat_id, String name) {
this.cat_name = name;
this.cat_id = cat_id;
}
public int getId() {
return cat_id;
}
public String getCatName() {
return cat_name;
}
public Boolean getChecked() {
return checked;
}
public void setChecked(Boolean checked) {
this.checked = checked;
}
public boolean isChecked() {
return checked;
}
public void toggleChecked() {
checked = !checked;
}
}
static class CategoryViewHolder {
ImageView imageViewCheck;
TextView textViewCategoryName;
public CategoryViewHolder(ImageView iv_check, TextView tv_category_name) {
imageViewCheck = iv_check;
textViewCategoryName = tv_category_name;
}
public ImageView getImageViewCheck() {
return imageViewCheck;
}
public TextView getTextViewCategoryName() {
return textViewCategoryName;
}
}
static class CategoryArrayAdapter extends ArrayAdapter<Category> {
LayoutInflater inflater;
public CategoryArrayAdapter(Context context, List<Category> categoryList) {
super(context, R.layout.single_row_delete_data,
R.id.textViewSingleRowDeleteData, categoryList);
inflater = LayoutInflater.from(context);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
Category category = (Category) this.getItem(position);
final ImageView imageViewCheck;
final TextView textViewCN;
if (convertView == null) {
convertView = inflater.inflate(R.layout.single_row_delete_data,
null);
imageViewCheck = (ImageView) convertView
.findViewById(R.id.imageViewSingleRowDeleteData);
textViewCN = (TextView) convertView
.findViewById(R.id.textViewSingleRowDeleteData);
convertView.setTag(new CategoryViewHolder(imageViewCheck,
textViewCN));
}
else {
CategoryViewHolder viewHolder = (CategoryViewHolder) convertView
.getTag();
imageViewCheck = viewHolder.getImageViewCheck();
textViewCN = viewHolder.getTextViewCategoryName();
}
imageViewCheck.setFocusable(false);
imageViewCheck.setFocusableInTouchMode(false);
imageViewCheck.setClickable(true);
imageViewCheck.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
ImageView iv = (ImageView) v;
Category category = (Category) iv.getTag();
if (category.getChecked() == false) {
imageViewCheck.setImageResource(R.drawable.set_check);
listOfItemsToDelete.add(category.getId());
category.setChecked(true);
} else {
imageViewCheck
.setImageResource(R.drawable.set_basecircle);
listOfItemsToDelete.remove((Integer) category.getId());
category.setChecked(false);
}
}
});
imageViewCheck.setTag(category);
if (category.getChecked() == true)
imageViewCheck.setImageResource(R.drawable.set_check);
else
imageViewCheck.setImageResource(R.drawable.set_basecircle);
textViewCN.setText(category.getCatName());
return convertView;
}
}
private void loadDatabase() {
database = openOrCreateDatabase("WalletAppDatabase.db",
SQLiteDatabase.OPEN_READWRITE, null);
}
}