以下应该执行您想要的操作（假设发送到意味着移动到）：-
public class MainActivity extends AppCompatActivity {
private static final String TAG = "MainActivity";
DB_Sqlite db = new DB_Sqlite(this);
ListView listView1;
ListView listView;
ArrayAdapter<String> adapter, adapter1; /* changed to use ArrayAdapter */
ArrayList<String> arrayList,arrayList1; /* moved (not necessary) */
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listView = (ListView) findViewById(R.id.list_view);
listView1 = (ListView) findViewById(R.id.list_view1);
arrayList = new ArrayList<String>();
arrayList.add("Complex Complex");
arrayList.add("Trix Complex");
arrayList.add("Kingdoms");
arrayList1 = new ArrayList<String>();
adapter = new ArrayAdapter<>(MainActivity.this,android.R.layout.simple_list_item_1,arrayList);
listView.setAdapter(adapter);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int position, long l) {
if (position == 0){
Intent intent = new Intent(MainActivity.this,cc.class);
startActivity(intent);
}
if (position == 1){
Intent intent = new Intent(MainActivity.this,tc.class);
startActivity(intent);
}
if (position == 2){
Intent intent = new Intent(MainActivity.this,k.class);
startActivity(intent);
}
}
});
listView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
@Override
public boolean onItemLongClick(AdapterView<?> adapterView, View view, int position, long l) {
if (position == 0) {
Boolean result = db.insertData((String) arrayList.get(position));
if (result == true){
Toast.makeText(MainActivity.this,"Added To Favorite",Toast.LENGTH_SHORT).show();
}else{
Toast.makeText(MainActivity.this, "Already Exist", Toast.LENGTH_SHORT).show();
}
}
if (position == 1){
Toast.makeText(MainActivity.this, "TC Added to Favorites", Toast.LENGTH_SHORT).show();
}
if (position == 2){
Toast.makeText(MainActivity.this, "K Added to Favorites", Toast.LENGTH_SHORT).show();
}
/*<<<<< the core code that was added >>>>>*/
arrayList1.add(arrayList.get(position));
arrayList.remove(position);
adapter1.notifyDataSetChanged();
adapter.notifyDataSetChanged();
return true;
}
});
/* added */
adapter1 = new ArrayAdapter<>(this,android.R.layout.simple_list_item_1,arrayList1);
listView1.setAdapter(adapter1);
}
public void showData(){
ArrayList arrayList1 = db.getAllrecord();
final ListAdapter adapter1 = new ArrayAdapter<>(MainActivity.this,android.R.layout.simple_list_item_1,arrayList1);
listView1.setAdapter(adapter1);
}
}
Result
- 第一个 ListView 具有蓝色背景，另一个 ListView 具有绿色背景，以便区分彼此。
刚开始时：-
长按 Trix Complex 后：-
额外的
重新评论：-
@AhmedZaqout 大致您需要做的是a）添加一列作为
哪个列表的指示符，例如favourite_flag 整数 默认值 0 b)
用初始值（Kingdons 等）填充数据库，而不是定义
ArrayList 中的值。当活动开始时提取值
根据指标栏分为2个列表。如果项目在第一个
长按更新行以设置指示器，然后刷新
列表。
然后考虑以下事项：-
DB_SQlite.java
public class DB_Sqlite extends SQLiteOpenHelper {
public static final String BDname = "data.db";
public static final int DBVERSION = 1; /*<<<<< ADDED BUT NOT NEEDED */
public static final String TABLE_FAVOURITES = "mytable";
public static final String FAVOURITES_COL_ID = BaseColumns._ID; /*<<<< use the Android stock ID name*/
public static final String FAVOURITES_COL_NAME = "name";
public static final String FAVOURITES_COL_FAVOURITEFLAG = "favourite_flag"; /*<<<<< NEW COLUMN */
public DB_Sqlite(@Nullable Context context) {
super(context, BDname, null, DBVERSION /*<<<<< used constant above */);
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL("create table " + TABLE_FAVOURITES + " (" +
FAVOURITES_COL_ID + " INTEGER PRIMARY KEY," + /*<<<<< AUTOINCREMENT NOT NEEDED AND IS INEFFICIENT */
FAVOURITES_COL_NAME + " TEXT, " +
FAVOURITES_COL_FAVOURITEFLAG + " INTEGER DEFAULT 0" + /*<<<<< COLUMN ADDED */
")");
/*<<<<< Add initial data */
/* Note indicator will set to non_favourite i.e. 0 */
ContentValues cv = new ContentValues();
cv.put(FAVOURITES_COL_NAME,"Complex Complex");
db.insert(TABLE_FAVOURITES,null,cv);
cv.clear();
cv.put(FAVOURITES_COL_NAME,"Trix Complex");
db.insert(TABLE_FAVOURITES,null,cv);
cv.clear();
cv.put(FAVOURITES_COL_NAME,"Kingdoms");
db.insert(TABLE_FAVOURITES,null,cv);
}
@Override
public void onUpgrade(SQLiteDatabase db, int i, int i1) {
db.execSQL("DROP TABLE IF EXISTS " + TABLE_FAVOURITES);
onCreate(db);
}
public boolean insertData(String name){
SQLiteDatabase db = this.getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put(FAVOURITES_COL_NAME, name);
long result = db.insert(TABLE_FAVOURITES,null, contentValues);
if (result == -1)
return false;
else
return true;
}
/*<<<<< ADDEDD */
public Cursor getFavouriteRows(boolean favourites /* true to return favourites (listView 2), false to return non-favourites (ListView 1) */) {
SQLiteDatabase db = this.getWritableDatabase();
String whereclause = FAVOURITES_COL_FAVOURITEFLAG + "=?";
String compare = "<1";
if (favourites) {
compare =">0";
}
return db.query(
TABLE_FAVOURITES,null,
FAVOURITES_COL_FAVOURITEFLAG + compare,
null,null,null,null
);
}
/*<<<<< ADDEDD */
private int setFavourite(long id, boolean favourite_flag) {
SQLiteDatabase db = this.getWritableDatabase();
String whereclause = FAVOURITES_COL_ID + "=?";
String[] whereargs = new String[]{String.valueOf(id)};
ContentValues cv = new ContentValues();
cv.put(FAVOURITES_COL_FAVOURITEFLAG,favourite_flag);
return db.update(TABLE_FAVOURITES,cv,whereclause,whereargs);
}
/*<<<<< ADDEDD */
public int setAsFavourite(long id) {
return setFavourite(id,true);
}
/*<<<<< ADDEDD */
public int setAsNotFavourite(long id) {
return setFavourite(id, false);
}
/* Will be unused */
public ArrayList getAllrecord(){
ArrayList arrayList = new ArrayList();
SQLiteDatabase db = this.getReadableDatabase();
Cursor res = db.rawQuery("select * from mytable",null);
res.moveToFirst();
while (res.isAfterLast()==false){
String t1 = res.getString(0);
arrayList.add(t1+" - ");
res.moveToNext();
}
return arrayList;
}
}
MainActivity.java
public class MainActivity extends AppCompatActivity {
private static final String TAG = "MainActivity";
DB_Sqlite db = new DB_Sqlite(this);
ListView listView1, listView;
//ArrayAdapter<String> adapter, adapter1; /*<<<<< commented out as unused */
//ArrayList<String> arrayList,arrayList1; /*<<<<< commented out as unused */
Cursor non_favourites_cursor, favourites_cursor; //<<<<< Added as goind to use Cursor Adapter */
SimpleCursorAdapter non_favourites_adapter, favourites_adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listView = (ListView) findViewById(R.id.list_view);
listView1 = (ListView) findViewById(R.id.list_view1);
manageBothListViews();
//arrayList = new ArrayList<String>();
//arrayList.add("Complex Complex");
//arrayList.add("Trix Complex");
//arrayList.add("Kingdoms");
//arrayList1 = new ArrayList<String>();
//adapter = new ArrayAdapter<>(MainActivity.this,android.R.layout.simple_list_item_1,arrayList);
//listView.setAdapter(adapter);
/*
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int position, long l) {
if (position == 0){
Intent intent = new Intent(MainActivity.this,cc.class);
startActivity(intent);
}
if (position == 1){
Intent intent = new Intent(MainActivity.this,tc.class);
startActivity(intent);
}
if (position == 2){
Intent intent = new Intent(MainActivity.this,k.class);
startActivity(intent);
}
}
});
listView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
@Override
public boolean onItemLongClick(AdapterView<?> adapterView, View view, int position, long l) {
if (position == 0) {
Boolean result = db.insertData((String) arrayList.get(position));
if (result == true){
Toast.makeText(MainActivity.this,"Added To Favorite",Toast.LENGTH_SHORT).show();
}else{
Toast.makeText(MainActivity.this, "Already Exist", Toast.LENGTH_SHORT).show();
}
}
if (position == 1){
Toast.makeText(MainActivity.this, "TC Added to Favorites", Toast.LENGTH_SHORT).show();
}
if (position == 2){
Toast.makeText(MainActivity.this, "K Added to Favorites", Toast.LENGTH_SHORT).show();
}
arrayList1.add(arrayList.get(position));
arrayList.remove(position);
adapter1.notifyDataSetChanged();
adapter.notifyDataSetChanged();
return true;
}
});
adapter1 = new ArrayAdapter<>(this,android.R.layout.simple_list_item_1,arrayList1);
listView1.setAdapter(adapter1);
*/
}
@Override
protected void onDestroy() {
super.onDestroy();
non_favourites_cursor.close();
favourites_cursor.close();
}
@Override
protected void onResume() {
super.onResume();
manageBothListViews();
}
public void showData(){
ArrayList arrayList1 = db.getAllrecord();
final ListAdapter adapter1 = new ArrayAdapter<>(MainActivity.this,android.R.layout.simple_list_item_1,arrayList1);
listView1.setAdapter(adapter1);
}
private void manageBothListViews() {
manageNonFavouritesListView();
manageFavouritesListView();
}
private void manageNonFavouritesListView() {
non_favourites_cursor = db.getFavouriteRows(false);
if (non_favourites_adapter == null) {
non_favourites_adapter = new SimpleCursorAdapter(
this,
android.R.layout.simple_list_item_1,
non_favourites_cursor,
new String[]{DB_Sqlite.FAVOURITES_COL_NAME},
new int[]{android.R.id.text1},
0
);
listView.setAdapter(non_favourites_adapter);
setListViewHandler(listView,false);
} else {
non_favourites_adapter.swapCursor(non_favourites_cursor);
}
}
private void manageFavouritesListView() {
favourites_cursor = db.getFavouriteRows(true);
if (favourites_adapter == null) {
favourites_adapter = new SimpleCursorAdapter(
this,
android.R.layout.simple_list_item_1,
favourites_cursor,
new String[]{DB_Sqlite.FAVOURITES_COL_NAME},
new int[]{android.R.id.text1},
0
);
listView1.setAdapter(favourites_adapter);
setListViewHandler(listView1,true);
} else {
favourites_adapter.swapCursor(favourites_cursor);
}
}
private void setListViewHandler(ListView lv, boolean favourite_flag) {
if (!favourite_flag) {
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
if (non_favourites_cursor.getString(non_favourites_cursor.getColumnIndex(DB_Sqlite.FAVOURITES_COL_NAME)).equals("Complex Complex")) {
Intent intent = new Intent(MainActivity.this,cc.class);
startActivity(intent);
}
if (non_favourites_cursor.getString(non_favourites_cursor.getColumnIndex(DB_Sqlite.FAVOURITES_COL_NAME)).equals("Trix Complex")) {
Intent intent = new Intent(MainActivity.this,tc.class);
startActivity(intent);
}
if (non_favourites_cursor.getString(non_favourites_cursor.getColumnIndex(DB_Sqlite.FAVOURITES_COL_NAME)).equals("Kingdoms")){
Intent intent = new Intent(MainActivity.this,k.class);
startActivity(intent);
}
}
});
lv.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
@Override
public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
db.setAsFavourite(id);
manageBothListViews();
return true;
}
});
} else {
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
if (favourites_cursor.getString(favourites_cursor.getColumnIndex(DB_Sqlite.FAVOURITES_COL_NAME)).equals("Complex Complex")) {
Intent intent = new Intent(MainActivity.this,cc.class);
startActivity(intent);
}
if (favourites_cursor.getString(favourites_cursor.getColumnIndex(DB_Sqlite.FAVOURITES_COL_NAME)).equals("Trix Complex")) {
Intent intent = new Intent(MainActivity.this,tc.class);
startActivity(intent);
}
if (favourites_cursor.getString(favourites_cursor.getColumnIndex(DB_Sqlite.FAVOURITES_COL_NAME)).equals("Kingdoms")){
Intent intent = new Intent(MainActivity.this,k.class);
startActivity(intent);
}
}
});
}
}
}
- 看评论
- 这使用 CursorAdapter 而不是 ArrayAdapter。
- 这使用创建数据库时存储在数据库中的值（名称王国等）。因此，您应该在运行更改后的代码之前卸载应用程序或删除应用程序的数据。
