我正在尝试单击listview中的值以转到新的xml布局我的问题是这个错误出来了：
从我的logcat我只能理解这个
03-24 11:37:20.990: E/AndroidRuntime(793): at me.mojica.caloriewatch.Search$1.onItemClick(Search.java:261)
这一个
Cursor cursor = (Cursor) parent.getItemAtPosition(position);
这是完整的logcat。
03-24 11:37:20.990: E/AndroidRuntime(793): FATAL EXCEPTION: main
03-24 11:37:20.990: E/AndroidRuntime(793): java.lang.ClassCastException: java.lang.String cannot be cast to android.database.Cursor
03-24 11:37:20.990: E/AndroidRuntime(793): at me.mojica.caloriewatch.Search$1.onItemClick(Search.java:261)
03-24 11:37:20.990: E/AndroidRuntime(793): at android.widget.AdapterView.performItemClick(AdapterView.java:298)
03-24 11:37:20.990: E/AndroidRuntime(793): at android.widget.AbsListView.performItemClick(AbsListView.java:1100)
03-24 11:37:20.990: E/AndroidRuntime(793): at android.widget.AbsListView$PerformClick.run(AbsListView.java:2749)
03-24 11:37:20.990: E/AndroidRuntime(793): at android.widget.AbsListView$1.run(AbsListView.java:3423)
03-24 11:37:20.990: E/AndroidRuntime(793): at android.os.Handler.handleCallback(Handler.java:725)
03-24 11:37:20.990: E/AndroidRuntime(793): at android.os.Handler.dispatchMessage(Handler.java:92)
03-24 11:37:20.990: E/AndroidRuntime(793): at android.os.Looper.loop(Looper.java:137)
03-24 11:37:20.990: E/AndroidRuntime(793): at android.app.ActivityThread.main(ActivityThread.java:5039)
03-24 11:37:20.990: E/AndroidRuntime(793): at java.lang.reflect.Method.invokeNative(Native Method)
03-24 11:37:20.990: E/AndroidRuntime(793): at java.lang.reflect.Method.invoke(Method.java:511)
03-24 11:37:20.990: E/AndroidRuntime(793): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
03-24 11:37:20.990: E/AndroidRuntime(793): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
03-24 11:37:20.990: E/AndroidRuntime(793): at dalvik.system.NativeStart.main(Native Method)
和我的search.java
package me.mojica.caloriewatch;
import java.util.ArrayList;
import android.app.Activity;
import android.content.Context;
import android.content.DialogInterface;
import android.content.SharedPreferences;
import android.content.pm.ActivityInfo;
import android.database.Cursor;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AlphabetIndexer;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.SectionIndexer;
import android.widget.SimpleCursorAdapter;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.ArrayAdapter;
import android.text.Editable;
import android.text.TextWatcher;
import android.content.DialogInterface.OnClickListener;
public class Search extends Activity implements OnClickListener {
int arlene = 0;
int textlength = 0;
ListView listContent1, transact;
EditText search, food, calories;
Button FSearch;
TextView result;
SimpleCursorAdapter cursorAdapter, cursorAdap;
Cursor cursor;
private String[] listview_array;
private ArrayList<String> array_sort = new ArrayList<String>();
private SQLiteAdapter mySQLiteAdapter;
/* Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.search);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
listContent1 = (ListView) findViewById(R.id.lFoodlist1);
listContent1.setFastScrollEnabled(true); //must be enabled
// transact = (ListView)findViewById(R.id.transact);
search = (EditText) findViewById(R.id.eFsearch);
food = (EditText) findViewById(R.id.editText1);
calories = (EditText) findViewById(R.id.editText2);
FSearch = (Button) findViewById(R.id.bFsearch);
result = (TextView) findViewById(R.id.textView3);
/*
Create/Open a SQLite database
and fill with dummy content
and close it
*/
mySQLiteAdapter = new SQLiteAdapter(this);
mySQLiteAdapter.openToWrite();
mySQLiteAdapter.deleteAll();
mySQLiteAdapter.insert("Adobong Baboy (1 bowl)", "339");
mySQLiteAdapter.insert("Adobong Kangkong ( 1 bowl)", "84");
mySQLiteAdapter.insert("Adobong Manok (1 bowl) ", "624");
mySQLiteAdapter.insert("Adobong Pusit (1 bowl)", "121");
mySQLiteAdapter.insert("Arroz Caldo (1 bowl)", "500");
mySQLiteAdapter.insert("Chicken Afritada (1 bowl)", "323");
mySQLiteAdapter.insert("Chicken Asado (1 bowl)", "205");
mySQLiteAdapter.insert("Chicken Empanada (1 bowl)", "150");
mySQLiteAdapter.insert("Chicken Tinola (1 bowl)", "267");
mySQLiteAdapter.insert("Dinuguan (1 bowl)", "255");
mySQLiteAdapter.insert("Fried Bangus (1 pc)", "162");
mySQLiteAdapter.insert("Ginataang Kalabasa (1 bowl)", "225");
mySQLiteAdapter.insert("Ginataang Langka (1 bowl)", "167");
mySQLiteAdapter.insert("Ginataang Pinakbet (1 bowl)", "155");
mySQLiteAdapter.insert("Igado (1 bowl)", "297");
mySQLiteAdapter.insert("Kare Kare (1 bowl)", "129");
mySQLiteAdapter.insert("Laing (1 bowl)", "202");
mySQLiteAdapter.insert("Lechon Kawali (1 bowl)", "245");
mySQLiteAdapter.insert("Pakbet (1 bowl)", "233");
mySQLiteAdapter.insert("Paksiw na Isda (1 bowl)", "73");
mySQLiteAdapter.insert("Paksiw na Pata (1 bowl)", "342");
mySQLiteAdapter.insert("Pinakbet (1 bowl)", "110");
mySQLiteAdapter.insert("Pork Afritada (1 bowl)", "402");
mySQLiteAdapter.insert("Pork Asado (1 bowl)", "533");
mySQLiteAdapter.insert("Pork Barbaque on Stick (1 stick)", "111");
mySQLiteAdapter.insert("Pork Embutido (1 bowl)", "350");
mySQLiteAdapter.insert("Pork Mechado (1 bowl)", "157");
mySQLiteAdapter.insert("Pork Nilaga (1 bowl)", "181");
mySQLiteAdapter.insert("Pork Pochero (1 bowl)", "798");
mySQLiteAdapter.insert("Pork Sinigang (1 bowl)", "290");
mySQLiteAdapter.insert("Relyenong Bangus (1 bowl)", "390");
mySQLiteAdapter.insert("Salmon Sinigang (1 bowl)", "190");
mySQLiteAdapter.insert("Sisig (1 bowl)", "293");
mySQLiteAdapter.insert("Tilapia (1 pc)", "100");
mySQLiteAdapter.insert("Tinolang Manok (1 bowl)", "843");
mySQLiteAdapter.insert("Tortang Talong (1 pc)", "291");
mySQLiteAdapter.insert("Balut (1 egg)", "188");
mySQLiteAdapter.insert("Beefsteak (1 bowl)", "210");
mySQLiteAdapter.insert("Bibingka", "100");
mySQLiteAdapter.insert("Biko (1 slice)", "100");
mySQLiteAdapter.insert("Buko Pie (1 slice)", "145");
mySQLiteAdapter.insert("Cassava Cake (1 slice)", "100");
mySQLiteAdapter.insert("Chicsilog (1 meal)", "284");
mySQLiteAdapter.insert("Coorned Beef (1 meal)", "267");
mySQLiteAdapter.insert("Danggit (1 pc)","98");
mySQLiteAdapter.insert("Ice Cream", "157");
mySQLiteAdapter.insert("Embotido", "187");
mySQLiteAdapter.insert("Ensaymada", "410");
mySQLiteAdapter.insert("Espasol", "50");
mySQLiteAdapter.insert("Fishball (1 pc)", "9");
mySQLiteAdapter.insert("Fruit Salad (1 bowl)", "211");
mySQLiteAdapter.insert("Galapong (1 slice)", "100");
mySQLiteAdapter.insert("Ginataan (1 bowl)", "167");
mySQLiteAdapter.insert("Halaya", "70");
mySQLiteAdapter.insert("Halo halo (1 cup)", "80");
mySQLiteAdapter.insert("Hotdog (1 pc)", "183");
mySQLiteAdapter.insert("Kutsinta", "100");
mySQLiteAdapter.insert("Leche Flan", "228");
mySQLiteAdapter.insert("Lomi", "222");
mySQLiteAdapter.insert("Longganisa (1 pc)", "170");
mySQLiteAdapter.insert("Lumpiang Shanghai (1 pc)", "169");
mySQLiteAdapter.insert("Palabok", "305");
mySQLiteAdapter.insert("Palitaw", "100");
mySQLiteAdapter.insert("Pancit", "416");
mySQLiteAdapter.insert("Pansit Palabok", "305");
mySQLiteAdapter.insert("Pastillas (1 pc)", "76");
mySQLiteAdapter.insert("Porksilog (1 meal)", "555");
mySQLiteAdapter.insert("Pulvoron (1 pc)", "40");
mySQLiteAdapter.insert("Puto (1 pc)", "112");
mySQLiteAdapter.insert("Puto Bumbong (1 pc)", "50");
mySQLiteAdapter.insert("Puto Pao (1 bun)", "120");
mySQLiteAdapter.insert("Qwek qwek (1 pc)", "14");
mySQLiteAdapter.insert("Saging na Saba", "122");
mySQLiteAdapter.insert("Sapin sapin (1 slice)", "100" );
mySQLiteAdapter.insert("Scrambled Egg", "100");
mySQLiteAdapter.insert("Sinangag (1 cup)", "300");
mySQLiteAdapter.insert("Siopao", "240");
mySQLiteAdapter.insert("Suman (1 pc )", "31");
mySQLiteAdapter.insert("Taho (1 cup)", "180");
mySQLiteAdapter.insert("Tapsilog (1 meal)", "364");
mySQLiteAdapter.insert("Tikoy (1 slice)", "100");
mySQLiteAdapter.insert("Tuyo (1 pc)", "57");
mySQLiteAdapter.insert("Yema (1 pc)", "20");
mySQLiteAdapter.insert("Apple", "80");
mySQLiteAdapter.insert("Apricots", "17");
mySQLiteAdapter.insert("Avocado", "30");
mySQLiteAdapter.insert("Banana", "105");
mySQLiteAdapter.insert("Blueberries", "82");
mySQLiteAdapter.insert("Cherry", "4");
mySQLiteAdapter.insert("Coconut", "159");
mySQLiteAdapter.insert("Eggplant", "132");
mySQLiteAdapter.insert("Grape Fruit", "62");
mySQLiteAdapter.insert("Guava", "61");
mySQLiteAdapter.insert("Kiwi Fruit", "25");
mySQLiteAdapter.insert("Lemon", "24");
mySQLiteAdapter.insert("Limes", "20");
mySQLiteAdapter.insert("Lychee", "4");
mySQLiteAdapter.insert("Mango", "107");
mySQLiteAdapter.insert("Melon", "188");
mySQLiteAdapter.insert("Orange", "62");
mySQLiteAdapter.insert("Peach", "38");
mySQLiteAdapter.insert("Pineapple (1 slice)", "42");
mySQLiteAdapter.insert("Pomelo (per section)", "72");
mySQLiteAdapter.insert("Rambutan", "7");
mySQLiteAdapter.insert("Raspberries", "82");
mySQLiteAdapter.insert("Strawberry", "8");
mySQLiteAdapter.insert("Tomato", "15");
mySQLiteAdapter.insert("Watermelon (per slice)", "46");
mySQLiteAdapter.close();
/*
Open the same SQLite database
and read all it's content.
*/
mySQLiteAdapter = new SQLiteAdapter(this);
mySQLiteAdapter.openToRead();
listview_array = mySQLiteAdapter.qall();
listContent1.setAdapter(new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, listview_array));
listContent1.setOnItemClickListener(listContentOnItemClickListener);
result.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
// Toast.makeText(Search.this, Toast.LENGTH_LONG).show();
}
});
search.addTextChangedListener(new TextWatcher()
{
public void afterTextChanged(Editable s)
{
// Abstract Method of TextWatcher Interface.
}
public void beforeTextChanged(CharSequence s,
int start, int count, int after)
{
// Abstract Method of TextWatcher Interface.
}
public void onTextChanged(CharSequence s,
int start, int before, int count)
{
textlength = search.getText().length();
array_sort.clear();
for (int i = 0; i < listview_array.length; i++)
{
if (textlength <= listview_array[i].length())
{
if(search.getText().toString().equalsIgnoreCase(
(String)
listview_array[i].subSequence(0,
textlength)))
{
array_sort.add(listview_array[i]);
}
}
}
listContent1.setAdapter(new ArrayAdapter<String>
(Search.this,
android.R.layout.simple_list_item_1, array_sort));
}
});
Cursor cursor = mySQLiteAdapter.queueAll();
startManagingCursor(cursor);
String[] from = new String[] { SQLiteAdapter.KEY_FOODNAME, SQLiteAdapter.KEY_CALORIES };
int[] to = new int[] { R.id.tv1, R.id.tv2 };
SimpleCursorAdapter cursorAdapter = new SimpleCursorAdapter(this, R.layout.row, cursor, from,
to);
listContent1.setAdapter(cursorAdapter);
listContent1.setOnItemClickListener(listContentOnItemClickListener);
}
private ListView.OnItemClickListener listContentOnItemClickListener = new ListView.OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Cursor cursor = (Cursor) parent.getItemAtPosition(position);
String item_content1 = cursor.getString(cursor.getColumnIndex(SQLiteAdapter.KEY_FOODNAME));
String item_content2 = cursor.getString(cursor.getColumnIndex(SQLiteAdapter.KEY_CALORIES));
arlene = arlene + Integer.parseInt(item_content2);
String item = String.valueOf(" Food Name: " + item_content1) + "\n" + " Calories: "
+ item_content2;
Toast.makeText(Search.this, item, Toast.LENGTH_LONG).show();
food.setText(item_content1);
calories.setText(String.valueOf(arlene));
result.setText(String.valueOf(arlene));
// define a key to store value into sharedpreferences
String key = food.getText().toString() + ":" + calories.getText().toString();
// here i assume that the combinasion food:calories are unique
SavePreferences(key, key);
/*
mySQLiteAdapter.openToWrite();
String data1 = food.getText().toString();
String data2 = calories.getText().toString();
mySQLiteAdapter.insertFood(data1, data2);
updateList();
*/
SavePreferences("computed", result.getText().toString());
}
};
protected void SavePreferences(String key, String value) {
// TODO Auto-generated method stub
SharedPreferences sharedPreferences = getSharedPreferences("MY_SHARED_PREF", MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPreferences.edit();
editor.putString(key, value);
editor.commit();
}
protected void LoadPreferences() {
// // TODO Auto-generated method stub
SharedPreferences sharedPreferences = getSharedPreferences("MY_SHARED_PREF", MODE_PRIVATE);
String strSavedMem1 = sharedPreferences.getString("computed", "");
// String strSavedMem2 = sharedPreferences.getString("calories", "");
//
result.setText(strSavedMem1);
}
// calories.setText(strSavedMem2);
// }
class MyCursorAdapter extends SimpleCursorAdapter implements SectionIndexer{
AlphabetIndexer alphaIndexer;
public MyCursorAdapter(Context context, int layout, Cursor c,
String[] from, int[] to) {
super(context, layout, c, from, to);
alphaIndexer=new AlphabetIndexer(c, cursor.getColumnIndex(SQLiteAdapter.KEY_FOODNAME), " ABCDEFGHIJKLMNOPQRSTUVWXYZ");
}
// you have just to instanciate the indexer class like this
//cursor,index of the sorted column,a string representing the alphabet (pay attention on the blank char at the beginning of the sequence)
@Override
public int getPositionForSection(int section) {
return alphaIndexer.getPositionForSection(section); //use the indexer
}
@Override
public int getSectionForPosition(int position) {
return alphaIndexer.getSectionForPosition(position); //use the indexer
}
@Override
public Object[] getSections() {
return alphaIndexer.getSections(); //use the indexer
}
}
protected void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
mySQLiteAdapter.close();
}
private void updateList() {
// TODO Auto-generated method stub
cursor.requery();
}
@Override
public void onClick(DialogInterface arg0, int arg1) {
// TODO Auto-generated method stub
}
}
答案 0 :(得分：0)
问题是onTextChanged：
你应该使用/拥有：cursorAdapter.getFilter().filter(s.toString());
我建议您查询用于在搜索edittext中键入的字符串，然后使用listview获取项目位置以在onItemClick Cursor cursor = (Cursor) listContent1.getItemAtPosition(position);中获取光标