我有一个列表视图。其中来自数据库列表视图的项目也有复选框。 listview工作正常。现在我在listview上放了一个edittext我wana过滤我的listview我尝试了很多。我喜欢这样做。我使用自定义适配器。
这是我的列表数据代码
public class DataListActivity extends Activity {
ListView listView;
SQLiteDatabase sqLiteDatabase;
FoodDbHelper foodDbHelper;
Cursor cursor;
ListDataAdapter listDataAdapter;
private Button button1;
ListDataAdapter dataAdapter = null;
Button button;
DataProvider dataProvider;
ArrayList<HashMap<String, String>> namessList;
EditText inputSearch;
String search_name;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.data_list_layout);
inputSearch = (EditText)findViewById(R.id.inputSearch);
inputSearch.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence cs, int arg1, int arg2, int arg3) {
// When user changes the Text
listDataAdapter.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
}
});
button1 = (Button) findViewById(R.id.button1);
button1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//Creating the instance of PopupMenu
PopupMenu popup = new PopupMenu(DataListActivity.this, button1);
//Inflating the Popup using xml file
popup.getMenuInflater()
.inflate(R.menu.popup_menu, popup.getMenu());
//registering popup with OnMenuItemClickListener
popup.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
public boolean onMenuItemClick(MenuItem item) {
AlertDialog.Builder a_builder = new AlertDialog.Builder(DataListActivity.this);
a_builder.setMessage("Do You Want To Close This App !!!")
.setCancelable(false)
.setPositiveButton("Yes",new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int id) {
Intent intent = new Intent(getApplicationContext(), MainMenu.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);
intent.putExtra("EXIT", true);
startActivity(intent);
//finish();
}
})
.setNegativeButton("No" , new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
AlertDialog alert = a_builder.create();
alert.setTitle("Alert !!!");
alert.show();
// Toast.makeText(
// MainMenu.this,
// "You Clicked : " + item.getTitle(),
// Toast.LENGTH_SHORT
// ).show();
return true;
}
});
popup.show(); //showing popup menu
}
});
listView = (ListView) findViewById(R.id.list_View);
listDataAdapter = new ListDataAdapter(getApplicationContext(),
R.layout.row_layout) {
@Override
protected void showCheckedButton(int position, boolean value) {
// TODO Auto-generated method stub
final DataProvider item = (DataProvider) listDataAdapter
.getItem(position);
Log.i("", "");
item.setSelected(value);
Button myButton = (Button) findViewById(R.id.findSelected);
myButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
StringBuffer responseText = new StringBuffer();
responseText
.append("The following dishes were selected...\n");
ArrayList<DataProvider> list = listDataAdapter
.getSelectedIndexes();
int sum = 0;
for (int i = 0; i < list.size(); i++) {
DataProvider dataProvider = list.get(i);
sum = sum + dataProvider.getCalorie();
responseText.append("\n" + dataProvider.getName()
+ " : " + dataProvider.getCalorie()
+ " kcal"
);
}
Toast.makeText(getApplicationContext(), ""+responseText+"\n"+"................................."
+"\n"+"Total Calories In Your Menu Is : " +sum,
Toast.LENGTH_LONG).show();
}
});
}
};
listView.setAdapter(listDataAdapter);
foodDbHelper = new FoodDbHelper(getApplicationContext());
sqLiteDatabase = foodDbHelper.getReadableDatabase();
cursor = foodDbHelper.getInformations(sqLiteDatabase);
if (cursor.moveToFirst()) {
do {
String name, quantity, fat, protein, sugar, carbohydrates;
boolean selected = false;
String names = null;
Integer calorie;
name = cursor.getString(0);
quantity = cursor.getString(1);
calorie = Integer.valueOf(cursor.getString(2));
fat = cursor.getString(3);
protein = cursor.getString(4);
sugar = cursor.getString(5);
carbohydrates = cursor.getString(6);
DataProvider dataProvider = new DataProvider(name, quantity,
calorie, fat, protein, sugar, carbohydrates, names, selected);
listDataAdapter.add(dataProvider);
} while (cursor.moveToNext());
}
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
String.valueOf(parent.getItemAtPosition(position));
Toast.makeText(getApplicationContext(),
"dish name is : " + name, Toast.LENGTH_SHORT).show();
Intent intent = new Intent(getApplicationContext(),
Detail.class);
}
});
}
public void gobackk(View view) {
Intent intent = new Intent(this, MainMenu.class);
startActivity(intent);
}
}
这是自定义适配器代码
public abstract class ListDataAdapter extends ArrayAdapter {
List list = new ArrayList();
boolean index[];
public ListDataAdapter(Context context, int resource) {
super(context, resource);
index = new boolean[list.size()];
}
static class LayoutHandler {
TextView name, quantity, calorie, fat, protein, sugar, carbohydrates;
CheckBox names;
}
@Override
public void add(Object object) {
super.add(object);
list.add(object);
index = new boolean[list.size()];
}
@Override
public int getCount() {
return list.size();
}
@Override
public Object getItem(int position) {
return list.get(position);
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
View row = convertView;
LayoutHandler layoutHandler;
if (row == null) {
LayoutInflater layoutInflater = (LayoutInflater) this.getContext()
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
row = layoutInflater.inflate(R.layout.row_layout, parent, false);
layoutHandler = new LayoutHandler();
layoutHandler.name = (TextView) row
.findViewById(R.id.text_dish_name);
layoutHandler.quantity = (TextView) row
.findViewById(R.id.text_dish_quantity);
layoutHandler.calorie = (TextView) row
.findViewById(R.id.text_dish_calorie);
layoutHandler.fat = (TextView) row.findViewById(R.id.text_dish_fat);
layoutHandler.protein = (TextView) row
.findViewById(R.id.text_dish_protein);
layoutHandler.sugar = (TextView) row
.findViewById(R.id.text_dish_sugar);
layoutHandler.carbohydrates = (TextView) row
.findViewById(R.id.text_dish_carbohydrates);
layoutHandler.names = (CheckBox) row.findViewById(R.id.checkBox1);
row.setTag(layoutHandler);
} else {
layoutHandler = (LayoutHandler) row.getTag();
}
DataProvider dataProvider = (DataProvider) this.getItem(position);
layoutHandler.name.setText(dataProvider.getName());
layoutHandler.quantity.setText(dataProvider.getQuantity());
layoutHandler.calorie
.setText(String.valueOf(dataProvider.getCalorie()));
layoutHandler.fat.setText(dataProvider.getFat());
layoutHandler.protein.setText(dataProvider.getProtein());
layoutHandler.sugar.setText(dataProvider.getSugar());
layoutHandler.carbohydrates.setText(dataProvider.getCarbohydrates());
//layoutHandler.names.setChecked(dataProvider.isSelected());
layoutHandler.names.setTag(position);
layoutHandler.names.setChecked(index[position]);
layoutHandler.names
.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
// TODO Auto-generated method stub
int pos = (Integer) buttonView.getTag();
index[pos] = isChecked;
showCheckedButton(position, isChecked);
}
});
return row;
}
public ArrayList<DataProvider> getSelectedIndexes() {
int size = list.size();
ArrayList<DataProvider> selectedItems = new ArrayList<DataProvider>();
for (int i = 0; i < size; i++) {
DataProvider cItem = (DataProvider) list.get(i);
if (index[i]) {
selectedItems.add(cItem);
}
}
return selectedItems;
}
protected abstract void showCheckedButton(int position, boolean value);
}