listview ImageButton项setImageResource已更改，但滚动listview时，再次显示上一个图像
任何人都可以帮助我。
当我添加图像按钮时，我有来自数据库的listview项目。
这是我的视图图像按钮..
<ImageButton
android:id="@+id/heart"
android:layout_width="32dp"
android:layout_height="32dp"
android:src="@drawable/heart"
android:layout_gravity="right|top"
android:background="#ffffff" />
在我的适配器中我有OnClickListener事件..
buttonHeart.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
if (arg0 != null) {
FragmentOne_DbAdapter database=new FragmentOne_DbAdapter(context);
database.open();
if(favorite.matches("0")) {
database.updateItemFavorite(_id,"1");
buttonHeart.setImageResource(R.drawable.heartred);
}else if(favorite.matches("1")){
database.updateItemFavorite(_id, "0");
buttonHeart.setImageResource(R.drawable.heart);
}
}
}
});
在我的OnClickListener中，我检查if(favorite.matches("0"))，然后检查setImageResource(R.drawable.heartred);
其他if(favorite.matches("1"))然后我setImageResource(R.drawable.heart);
这件事有效。
如果单击按钮心脏，则会更改为发送电话
但问题是当我滚动列表视图时， heartred 再次转向 heart 。
请帮帮我。
这是完整的适配器..
public class FragmentOne_Adapter extends CursorAdapter {
public FragmentOne_Adapter(Context context, Cursor c, int flags) {
super(context, c, flags);
// TODO Auto-generated constructor stub
}
@Override
public void bindView(View view, final Context context, final Cursor cursor) {
// TODO Auto-generated method stub
TextView txtTitle = (TextView) view.findViewById(R.id.title);
TextView txtArtist = (TextView) view.findViewById(R.id.artist);
TextView txtVolume = (TextView) view.findViewById(R.id.volume);
TextView txtNumber = (TextView) view.findViewById(R.id.number);
final ImageButton buttonHeart = (ImageButton) view.findViewById(R.id.heart);
final int _id = cursor.getInt(cursor.getColumnIndexOrThrow("_id"));
String title = cursor.getString(cursor.getColumnIndexOrThrow("title"));
String artist = cursor.getString(cursor.getColumnIndexOrThrow("artist"));
String volume = cursor.getString(cursor.getColumnIndexOrThrow("volume"));
final String favorite = cursor.getString(cursor.getColumnIndexOrThrow("favorite"));
String number = cursor.getString(cursor.getColumnIndexOrThrow("number"));
// Populate fields with extracted properties
txtTitle.setText(title);
txtArtist.setText(artist);
txtVolume.setText(volume);
txtNumber.setText(number);
if(favorite.matches("0")) {
buttonHeart.setImageResource(R.drawable.heart);
}else if(favorite.matches("1")){
buttonHeart.setImageResource(R.drawable.heartred);
}
buttonHeart.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
if (arg0 != null) {
FragmentOne_DbAdapter database=new FragmentOne_DbAdapter(context);
database.open();
if(favorite.matches("0")) {
database.updateItemFavorite(_id,"1");
buttonHeart.setImageResource(R.drawable.heartred);
}else if(favorite.matches("1")){
database.updateItemFavorite(_id, "0");
buttonHeart.setImageResource(R.drawable.heart);
}
}
}
});
}
@Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
// TODO Auto-generated method stub
return LayoutInflater.from(context).inflate(R.layout.fragment_fragment_one_slview, parent, false);
}
}
这是我的片段..
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View rootView = inflater.inflate(R.layout.fragment_fragment_one, container, false);
TabHost host = (TabHost) rootView.findViewById(R.id.tabHost);
host.setup();
//Tab 1
TabHost.TabSpec spec = host.newTabSpec("SONG LIST");
spec.setContent(R.id.tab1);
spec.setIndicator("SONG LIST");
host.addTab(spec);
player1ESearch = (EditText) rootView.findViewById(R.id.player1Search);
listView = (ListView) rootView.findViewById(R.id.slPlayer1ListView);
dbHelper = new FragmentOne_DbAdapter(getActivity());
dbHelper.open();
//Clean all data
//dbHelper.deleteAllPlayer1();
//Add some data
dbHelper.insertPlayer1Songlist();
//Generate ListView from SQLite Database
displayPlayer1ListView();
ImageButton dplayer1ESearch=(ImageButton) rootView.findViewById(R.id.delete);
dplayer1ESearch.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
player1ESearch.setText("");
}
});
//Tab 2
spec = host.newTabSpec("NEW SONGS");
spec.setContent(R.id.tab2);
spec.setIndicator("NEW SONGS");
host.addTab(spec);
//Tab 3
spec = host.newTabSpec("FAVORITES");
spec.setContent(R.id.tab3);
spec.setIndicator("FAVORITES");
host.addTab(spec);
return rootView;
}
private void displayPlayer1ListView() {
Cursor cursor = dbHelper.fetchAllPlayer1();
FragmentOneAdapter = new FragmentOne_Adapter(getActivity(), cursor, 0);
listView.setAdapter(FragmentOneAdapter);
player1ESearch.addTextChangedListener(new TextWatcher() {
public void afterTextChanged(Editable s) {
}
public void beforeTextChanged(CharSequence s, int start,
int count, int after) {
}
public void onTextChanged(CharSequence s, int start,
int before, int count) {
FragmentOneAdapter.getFilter().filter(s.toString());
}
});
FragmentOneAdapter.setFilterQueryProvider(new FilterQueryProvider() {
public Cursor runQuery(CharSequence constraint) {
return dbHelper.fetchPlayer1ByTitle(constraint.toString());
}
});
}
这是我的数据库适配器..
public class FragmentOne_DbAdapter {
public static final String KEY_ROWID = "_id";
public static final String KEY_TITLE = "title";
public static final String KEY_ARTIST = "artist";
public static final String KEY_VOLUME = "volume";
public static final String KEY_TYPE = "type";
public static final String KEY_FAVORITE = "favorite";
public static final String KEY_NUMBER = "number";
private static final String TAG = "FragmentOne_DbAdapter";
private DatabaseHelper mDbHelper;
private SQLiteDatabase mDb;
private static final String DATABASE_NAME = "Virtualsongbook";
private static final String SQLITE_TABLE = "Player1";
private static final int DATABASE_VERSION = 1;
private final Context mCtx;
private static final String DATABASE_CREATE =
"CREATE TABLE if not exists " + SQLITE_TABLE + " (" +
KEY_ROWID + " integer PRIMARY KEY autoincrement," +
KEY_TITLE + "," +
KEY_ARTIST + "," +
KEY_VOLUME + "," +
KEY_TYPE + "," +
KEY_FAVORITE + "," +
KEY_NUMBER + ")";
private static class DatabaseHelper extends SQLiteOpenHelper {
DatabaseHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
//Log.w(TAG, DATABASE_CREATE);
db.execSQL(DATABASE_CREATE);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
//Log.w(TAG, "Upgrading database from version " + oldVersion + " to " + newVersion + ", which will destroy all old data");
db.execSQL("DROP TABLE IF EXISTS " + SQLITE_TABLE);
onCreate(db);
}
}
public FragmentOne_DbAdapter(Context ctx) {
this.mCtx = ctx;
}
public FragmentOne_DbAdapter open() throws SQLException {
mDbHelper = new DatabaseHelper(mCtx);
mDb = mDbHelper.getWritableDatabase();
return this;
}
public void close() {
if (mDbHelper != null) {
mDbHelper.close();
}
}
private boolean isRecordExistInDatabase(String tableName, String field, String value) {
String query = "SELECT * FROM " + tableName + " WHERE " + field + " = '" + value + "'";
Cursor c = mDb.rawQuery(query, null);
if (c.moveToFirst()) {
c.close();
return true;
}
c.close();
return false;
}
public long createPlayer1(String title,
String artist, String volume,
String type, String favorite, String number) {
if(isRecordExistInDatabase(SQLITE_TABLE, KEY_NUMBER, number)){
return 0;
}
ContentValues initialValues = new ContentValues();
initialValues.put(KEY_TITLE, title);
initialValues.put(KEY_ARTIST, artist);
initialValues.put(KEY_VOLUME, volume);
initialValues.put(KEY_TYPE, type);
initialValues.put(KEY_FAVORITE, favorite);
initialValues.put(KEY_NUMBER, number);
return mDb.insert(SQLITE_TABLE, null, initialValues);
}
public boolean deleteAllPlayer1() {
int doneDelete = 0;
doneDelete = mDb.delete(SQLITE_TABLE, null , null);
//Log.w(TAG, Integer.toString(doneDelete));
return doneDelete > 0;
}
public Cursor fetchPlayer1ByTitle(String titleText) throws SQLException {
//Log.w(TAG, titleText);
Cursor mCursor = null;
if (titleText == null || titleText.length () == 0) {
mCursor = mDb.query(SQLITE_TABLE, new String[] {KEY_ROWID,
KEY_TITLE, KEY_ARTIST, KEY_VOLUME, KEY_TYPE, KEY_FAVORITE, KEY_NUMBER},
null, null, null, null, null);
}
else {
mCursor = mDb.query(true, SQLITE_TABLE, new String[] {KEY_ROWID,
KEY_TITLE, KEY_ARTIST, KEY_VOLUME, KEY_TYPE, KEY_FAVORITE, KEY_NUMBER},
KEY_TITLE + " like '%" + titleText + "%'", null,
null, null, null, null);
}
if (mCursor != null) {
mCursor.moveToFirst();
}
return mCursor;
}
public Cursor fetchAllPlayer1() {
Cursor mCursor = mDb.query(SQLITE_TABLE, new String[] {KEY_ROWID,
KEY_TITLE, KEY_ARTIST, KEY_VOLUME, KEY_TYPE, KEY_FAVORITE, KEY_NUMBER},
null, null, null, null, null);
if (mCursor != null) {
mCursor.moveToFirst();
}
return mCursor;
}
public boolean updateItemFavorite(long rowId, String favorite) {
int doneUpdate = 0;
ContentValues values = new ContentValues();
values.put(KEY_FAVORITE, favorite);
doneUpdate = mDb.update(SQLITE_TABLE, values, KEY_ROWID + "=" + rowId,null);
return doneUpdate > 0;
}
public void insertPlayer1Songlist() {
//TYPE
//0 - NONE
//1 - NEW
createPlayer1("Song Title 1", "Artist 1", "Vol 1","0","0","12341");
createPlayer1("Song Title 2", "Artist 2", "Vol 2","0","0","12342");
createPlayer1("Song Title 3", "Artist 3", "Vol 3","0","0","12343");
createPlayer1("Song Title 4", "Artist 4", "Vol 4","0","0","12344");
createPlayer1("Song Title 5", "Artist 5", "Vol 5","0","0","12345");
createPlayer1("Song Title 6", "Artist 6", "Vol 6","0","0","12346");
createPlayer1("Song Title 7", "Artist 7", "Vol 7","0","0","12347");
createPlayer1("Song Title 8", "Artist 8", "Vol 8","0","0","12348");
createPlayer1("Song Title 9", "Artist 9", "Vol 9","0","0","12349");
createPlayer1("Song Title 10", "Artist 10", "Vol 10","0","0","12310");
createPlayer1("Song Title 11", "Artist 11", "Vol 11","0","0","12311");
createPlayer1("Song Title 12", "Artist 12", "Vol 12","0","0","12312");
createPlayer1("Joemar", "Artist 1", "Vol 1","0","0","09876");
createPlayer1("Joehamir", "Artist 2", "Vol 2","0","0","76543");
createPlayer1("Joenair", "Artist 3", "Vol 3","0","0","43211");
}
}
发生了什么的图像
感谢，
乔
2 个答案:
答案 0 :(得分：4)
使用HolderPattern修改适配器
public class FragmentOne_Adapter extends CursorAdapter {
FragmentOne_DbAdapter dbHelper;
public FragmentOne_Adapter(Context context, Cursor c, int flags) {
super(context, c, flags);
// TODO Auto-generated constructor stub
dbHelper = new FragmentOne_DbAdapter(context);
dbHelper.open();
}
@Override
public void bindView(View view, final Context context, final Cursor cursor) {
// TODO Auto-generated method stub
final ViewHolder holder = (ViewHolder) view.getTag();
final int _id = cursor.getInt(cursor.getColumnIndexOrThrow("_id"));
String title = cursor.getString(cursor.getColumnIndexOrThrow("title"));
String artist = cursor.getString(cursor.getColumnIndexOrThrow("artist"));
String volume = cursor.getString(cursor.getColumnIndexOrThrow("volume"));
final String favorite = cursor.getString(cursor.getColumnIndexOrThrow("favorite"));
String number = cursor.getString(cursor.getColumnIndexOrThrow("number"));
// Populate fields with extracted properties
holder.txtTitle.setText(title);
holder.txtArtist.setText(artist);
holder.txtVolume.setText(volume);
holder.txtNumber.setText(number);
if (favorite.matches("0")) {
holder.buttonHeart.setImageResource(R.drawable.heart);
} else {
if (favorite.matches("1")) {
holder.buttonHeart.setImageResource(R.drawable.heartred);
} else {
holder.buttonHeart.setImageResource(R.drawable.heart);
}
}
holder.buttonHeart.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
if (arg0 != null) {
FragmentOne_DbAdapter database = new FragmentOne_DbAdapter(context);
database.open();
if (favorite.matches("0")) {
database.updateItemFavorite(_id, "1");
holder.buttonHeart.setImageResource(R.drawable.heartred);
} else if (favorite.matches("1")) {
database.updateItemFavorite(_id, "0");
holder.buttonHeart.setImageResource(R.drawable.heart);
}
}
FragmentOne_Adapter.this.changeCursor(dbHelper.fetchAllPlayer1());
}
});
}
@Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
// TODO Auto-generated method stub
// View rowView = ((LayoutInflater) context
// .getSystemService("layout_inflater")).inflate(
// R.layout.fragment_fragment_one_slview, parent, false);
View rowView = LayoutInflater.from(context).inflate(R.layout.fragment_fragment_one_slview, parent, false);
ViewHolder holder = new ViewHolder();
holder.txtTitle = (TextView) rowView.findViewById(R.id.title);
holder.txtArtist = (TextView) rowView.findViewById(R.id.artist);
holder.txtVolume = (TextView) rowView.findViewById(R.id.volume);
holder.txtNumber = (TextView) rowView.findViewById(R.id.number);
holder.buttonHeart = (ImageButton) rowView.findViewById(R.id.heart);
rowView.setTag(holder);
return rowView;
}
class ViewHolder {
TextView txtTitle;
TextView txtArtist;
TextView txtVolume;
TextView txtNumber;
ImageButton buttonHeart;
}
}
答案 1 :(得分：2)
查看视图模式。 Listviews重用其视图用于性能目的，这就是滚动时遇到问题的原因。以下是一个示例：ListView reusing views when ... I don't want it to
相关问题
- 如何逐项显示列表视图滚动
- 访问listview中的imagebutton并设置其setImageResource
- 滚动向上和向下列表视图时项目图像会发生变化
- 更改ListView行项目高度大小，但Scroll再次计算它
- 在滚动期间，Android ListView和GridView重复更改项目
- listview ImageButton项setImageResource已更改，但滚动listview时，再次显示上一个图像
- 当listview中的滚动更新数据更改为以前的数据
- 列表项选择设置bgcolor但自动向下滚动列表项集bgcolor已更改
- 单击图像按钮项自定义列表视图android时更改图像
- 防止listView项目ImageButton更改滚动状态。并防止其他ImageButton由于一个ImageButton而更改状态
最新问题
- 我写了这段代码，但我无法理解我的错误
- 我无法从一个代码实例的列表中删除 None 值，但我可以在另一个实例中。为什么它适用于一个细分市场而不适用于另一个细分市场？
- 是否有可能使 loadstring 不可能等于打印？卢阿
- java中的random.expovariate()
- Appscript 通过会议在 Google 日历中发送电子邮件和创建活动
- 为什么我的 Onclick 箭头功能在 React 中不起作用？
- 在此代码中是否有使用“this”的替代方法？
- 在 SQL Server 和 PostgreSQL 上查询，我如何从第一个表获得第二个表的可视化
- 每千个数字得到
- 更新了城市边界 KML 文件的来源？