我有一个ListView可以正常工作。现在我已将EditText放在ListView的顶部。我想要的是当输入字母“A”时，只有以“A”开头的名字应出现在列表中。我试着这样做但没有任何反应请检查我的代码并告诉我我做错了什么。
这是我的数据清单代码。
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);
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
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();
}
});
inputSearch = (EditText)findViewById(R.id.inputSearch);
listView.setAdapter(listDataAdapter);
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
}
});
}
};
listView.setAdapter(listDataAdapter);
foodDbHelper = new FoodDbHelper(getApplicationContext());
sqLiteDatabase = foodDbHelper.getReadableDatabase();
cursor = foodDbHelper.getInformations(sqLiteDatabase);
if (cursor.moveToFirst()) {
do {
String name, quantity, fat, protein, sugar, vitamins;
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);
vitamins = cursor.getString(6);
DataProvider dataProvider = new DataProvider(name, quantity,
calorie, fat, protein, sugar, vitamins, 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 name = (String) ((TextView) view
.findViewById(R.id.text_dish_name)).getText();
String quantity = (String) ((TextView) view
.findViewById(R.id.text_dish_quantity)).getText();
String calorie = (String) ((TextView) view
.findViewById(R.id.text_dish_calorie)).getText();
String fat = (String) ((TextView) view
.findViewById(R.id.text_dish_fat)).getText();
String protein = (String) ((TextView) view
.findViewById(R.id.text_dish_protein)).getText();
String sugar = (String) ((TextView) view
.findViewById(R.id.text_dish_sugar)).getText();
String vitamins = (String) ((TextView) view
.findViewById(R.id.text_dish_vitamins)).getText();
String.valueOf(parent.getItemAtPosition(position));
Toast.makeText(getApplicationContext(),
"dish name is : " + name, Toast.LENGTH_SHORT).show();
Intent intent = new Intent(getApplicationContext(),
Detail.class);
intent.putExtra("Dish name", name);
intent.putExtra("Dish quantity", quantity);
intent.putExtra("Dish calorie", calorie);
intent.putExtra("Dish fat", fat);
intent.putExtra("Dish protein", protein);
intent.putExtra("Dish sugar", sugar);
intent.putExtra("Dish vitamins", vitamins);
startActivity(intent);
}
});
}
public void gobackk(View view) {
Intent intent = new Intent(this, MainMenu.class);
startActivity(intent);
}
}