[英]How to fix cursor that is taking #2nd record instead of #1st (#3rd instead of #2nd etc.)?
Layout is just main.xml which shows multiple row.xml when new information is added to sqlite database. 布局只是main.xml,当将新信息添加到sqlite数据库时,它将显示多个row.xml。 When button is clicked AlertDialog with data is shown. 单击按钮时,将显示带有数据的AlertDialog。 The problem is that when I click button in row, AlertDialog is taking data from next record (next row) in database (when I click first button, AD is taking second record, etc.), not from the position where button is. 问题是,当我单击行中的按钮时,AlertDialog正在从数据库中的下一条记录(下一行)中获取数据(当我单击第一个按钮时,AD正在获取第二条记录等),而不是从按钮所在位置获取数据。 I setTag for button and toast message is showing good ID when it's clicked. 我为按钮设置setTag,并在单击Toast消息时显示良好的ID。
MyCursorAdapter.java MyCursorAdapter.java
(...)
@Override
public void bindView(View view, Context context, Cursor cursor) {
TextView name = (TextView) view.findViewById(R.id.name);
TextView id = (TextView) view.findViewById(R.id.id);
TextView quantity = (TextView) view.findViewById(R.id.quantity);
TextView mu = (TextView) view.findViewById(R.id.mu);
Button bt = (Button) view.findViewById(R.id.rowalertdialog);
CheckBox cb = (CheckBox)view.findViewById(R.id.checkboxmain2);
name.setText(cursor.getString(cursor.getColumnIndex(SQLiteAdapter.KEY_NAME)));
id.setText(cursor.getString(cursor.getColumnIndex(SQLiteAdapter._id)));
quantity.setText(cursor.getString(cursor.getColumnIndex(SQLiteAdapter.KEY_QUANTITY)));
mu.setText(cursor.getString(cursor.getColumnIndex(SQLiteAdapter.KEY_MU)));
bt.setTag(cursor.getString(cursor.getColumnIndex(SQLiteAdapter._id)));
cb.setChecked(cursor.getInt(cursor.getColumnIndex(SQLiteAdapter.KEY_CHECKED)) > 0);
cb.setTag(cursor.getString(cursor.getColumnIndex(SQLiteAdapter._id)));
}
AndroidSQLite.java AndroidSQLite.java
(...)
private void manageListView() {
cursor = mySQLiteAdapter.queueAll();
if(myadapter == null){
myadapter = new MyCursorAdapter(this,cursor);
listContent.setAdapter(myadapter);
}else {
myadapter.swapCursor(cursor);
}
}
onClick for button onClick按钮
public void ListViewButtonHandler(View v){
Button bt = v.findViewById(R.id.rowalertdialog);
Toast.makeText(this, "You clicked the Button for ID " + (String)bt.getTag(), Toast.LENGTH_SHORT).show();
int id = Integer.valueOf((String) bt.getTag());
ListView parent = (ListView)findViewById(R.id.contentlist);
Cursor cursor = (Cursor) parent.getItemAtPosition(id);
final int item_id = cursor.getInt(cursor.getColumnIndex(SQLiteAdapter._id));
String item_name = cursor.getString(cursor.getColumnIndex(SQLiteAdapter.KEY_NAME));
String item_quantity = cursor.getString(cursor.getColumnIndex(SQLiteAdapter.KEY_QUANTITY));
AlertDialog.Builder myDialog
= new AlertDialog.Builder(AndroidSQLite.this);
myDialog.setTitle("Delete/Edit?");
TextView dialogTxt_id = new TextView(AndroidSQLite.this);
LayoutParams dialogTxt_idLayoutParams
= new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
dialogTxt_id.setLayoutParams(dialogTxt_idLayoutParams);
dialogTxt_id.setText("#" + String.valueOf(item_id));
final EditText dialogC1_id = new EditText(AndroidSQLite.this);
LayoutParams dialogC1_idLayoutParams
= new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT);
dialogC1_id.setLayoutParams(dialogC1_idLayoutParams);
dialogC1_id.setText(item_name);
final EditText dialogC2_id = new EditText(AndroidSQLite.this);
LayoutParams dialogC2_idLayoutParams
= new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT);
dialogC2_id.setLayoutParams(dialogC2_idLayoutParams);
dialogC2_id.setText(item_quantity);
LinearLayout layout = new LinearLayout(AndroidSQLite.this);
layout.setOrientation(LinearLayout.VERTICAL);
layout.addView(dialogTxt_id);
layout.addView(dialogC1_id);
layout.addView(dialogC2_id);
myDialog.setView(layout);
myDialog.setPositiveButton("Delete", new DialogInterface.OnClickListener() {
// do something when the button is clicked
public void onClick(DialogInterface arg0, int arg1) {
mySQLiteAdapter.delete_byID(item_id);
updateList();
//manageListView();
}
});
myDialog.setNeutralButton("Update", new DialogInterface.OnClickListener() {
// do something when the button is clicked
public void onClick(DialogInterface arg0, int arg1) {
String value1 = dialogC1_id.getText().toString();
String value2 = dialogC2_id.getText().toString();
mySQLiteAdapter.update_byID(item_id, value1, value2);
updateList();
//manageListView();
}
});
myDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
// do something when the button is clicked
public void onClick(DialogInterface arg0, int arg1) {
}
});
manageListView();
myDialog.show();
}
I think problem is in: 我认为问题出在:
int id = Integer.valueOf((String) bt.getTag());
ListView parent = (ListView)findViewById(R.id.contentlist);
Cursor cursor = (Cursor) parent.getItemAtPosition(id);
But I don't know how to solve it. 但是我不知道如何解决。 I don't know why it's taking "next" record. 我不知道为什么要录下一张唱片。
EDIT I made second (alternative) changes to code, and now when I click button activity come back to previous screen (mainactivity). 编辑我对代码进行了第二次(替代)更改,现在,当我单击按钮活动时,返回到先前的屏幕(mainactivity)。 Logcat shows: Logcat显示:
FATAL EXCEPTION: main
Process: com.sjkdev.androidsqlite, PID: 14453
java.lang.IllegalStateException: Could not execute method for android:onClick
at
android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:390)
at android.view.View.performClick(View.java:5646)
at android.view.View$PerformClick.run(View.java:22459)
at android.os.Handler.handleCallback(Handler.java:761)
at android.os.Handler.dispatchMessage(Handler.java:98)
at android.os.Looper.loop(Looper.java:156)
at
android.app.ActivityThread.main(ActivityThread.java:6523)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:941)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:831)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invoke(Native Method)
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:385)
at android.view.View.performClick(View.java:5646)
at android.view.View$PerformClick.run(View.java:22459)
at android.os.Handler.handleCallback(Handler.java:761)
at android.os.Handler.dispatchMessage(Handler.java:98)
at android.os.Looper.loop(Looper.java:156)
at android.app.ActivityThread.main(ActivityThread.java:6523)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:941)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:831)
Caused by: android.database.CursorIndexOutOfBoundsException: Index -1 requested, with a size of 1
at android.database.AbstractCursor.checkPosition(AbstractCursor.java:460)
at android.database.AbstractWindowedCursor.checkPosition(AbstractWindowedCursor.java:136)
at android.database.AbstractWindowedCursor.getInt(AbstractWindowedCursor.java:68)
at com.sjkdev.androidsqlite.AndroidSQLite.ListViewButtonHandler(AndroidSQLite.java:307)
Cursor cursor = (Cursor) parent.getItemAtPosition(id)
; Cursor cursor = (Cursor) parent.getItemAtPosition(id)
; will get the item according to it's position in the list, but you are using the id (as extracted from the button's Tag) as it's position. 将根据项目在列表中的位置获取该项目,但是您使用的是id(从按钮的Tag中提取)作为位置。 This will rarely if ever be correct. 如果是正确的话,这将很少。
The first position in the list is 0, the first id will be 1 (assuming no rows have been deleted and you aren't manually setting the id) and hence the symptoms you report. 列表中的第一个位置是0,第一个ID将是1(假设没有删除任何行,并且您没有手动设置ID),因此报告了症状。
If rows have been deleted then each missing id can increase the difference between id and position. 如果已删除行,则每个丢失的ID都会增加ID和位置之间的差异。 If the rows are sorted in any other order than id, then positions v id's could be way out. 如果以id以外的其他顺序对行进行排序,则位置v id可能会掉线。 If a where clause excludes rows then again id's and position would vary. 如果where子句排除行,则id和位置也会再次变化。
Simple fact is you can't rely on any relationship between id and the position in the list. 一个简单的事实是,您不能依赖id与列表中位置之间的任何关系。
What you could do is use the id, from the Tag, to query the database to extract the specific row. 您可以做的是使用Tag中的ID来查询数据库以提取特定行。 The query would be be the same as the query used to get the cursor for the list except that it would utilise the 3rd ( SQLiteAdapter._id + "=?"
) and 4th parameters ( new String[]{String.valueOf(id)}
) (if using the query convenience method). 该查询将与用于获取列表光标的查询相同,只不过它将使用第3个( SQLiteAdapter._id + "=?"
)和第4个参数( new String[]{String.valueOf(id)}
)(如果使用查询便捷方法)。
I tried add code as I wrote in last comment, but it's wrong. 我在上一条评论中尝试添加代码,但这是错误的。 I don't know how to implement your changes. 我不知道如何实施您的更改。 – –
Your code could be :- 您的代码可能是:-
public void ListViewButtonHandler(View v){
Button bt = v.findViewById(R.id.rowalertdialog);
Toast.makeText(this, "You clicked the Button for ID " + (String)bt.getTag(), Toast.LENGTH_SHORT).show(); //TODO not needed
int id = Integer.valueOf((String) bt.getTag());
ListView parent = (ListView)findViewById(R.id.contentlist); //<<<<<<<<<< NOT NEEDED (I think)
String whereclause = SQLiteAdapter._id _ "=?"; //<<<<<<<<<< ADDED
String[] whereargs = new String[]{bt.getTag()}; //<<<<<<<<<< ADDED
Cursor cursor = mySQLiteAdapter.getWitableDatabase().query(SQLiteAdapter.MYDATABASE_TABLE,null,whereclause,whereargs,null,null,null); //<<<<<<<<<< ADDED
//Cursor cursor = (Cursor) parent.getItemAtPosition(id); //<<<<<<<<<< REMOVED/COMMENTED OUT
//<<<<<<<<<<< ADDED to move to the extracted row, will toast if no such row
if (!cursor.moveToFirst) {
Toast.makeText(this, "Unable to retrieve row for ID " + (String)bt.getTag(), Toast.LENGTH_SHORT).show();
return;
}
final int item_id = cursor.getInt(cursor.getColumnIndex(SQLiteAdapter._id));
String item_name = cursor.getString(cursor.getColumnIndex(SQLiteAdapter.KEY_NAME));
String item_quantity = cursor.getString(cursor.getColumnIndex(SQLiteAdapter.KEY_QUANTITY))
cursor.close(); //<<<<<<<<<< ADDED should always close a cursor when done with it
.......... the rest of the code
Please note the comments 请注意评论
Note you may need to change SQLiteAdapter.MYDATABASE_TABLE to an appropriate value. 请注意,您可能需要将SQLiteAdapter.MYDATABASE_TABLE更改为适当的值。
Note the above code is in-principle code, it has not been tested or run and may therefore have some errors 请注意,上面的代码是内部代码,尚未经过测试或运行,因此可能会有一些错误
If you added the following method (based upon the previous question) to SQLiteAdapter.java :- 如果您将以下方法(基于上一个问题)添加到SQLiteAdapter.java中:
public Cursor queueOneById(long id) {
String whereclause = _id + "=?";
String[] whereargs = new String[]{String.valueOf(id)};
String[] columns = new String[]{_id, KEY_NAME, KEY_PRICE,
KEY_QUANTITY, KEY_MU,
KEY_PDATE, KEY_SHOP, KEY_CHECKED};
return sqLiteDatabase.query(MYDATABASE_TABLE,columns,whereclause,whereargs,
null,null,null);
}
Then you could change 那你可以改变
Cursor cursor = mySQLiteAdapter.getWitableDatabase().query(SQLiteAdapter.MYDATABASE_TABLE,null,whereclause,whereargs,null,null,null);
To 至
Cursor cursor = mySQLiteAdapter.queueOneById(id);
Note this still requires the other changes above. 请注意,这仍然需要上面的其他更改。 That is you need :- 那是你需要的:-
if (!cursor.moveToFirst) { Toast.makeText(this, "Unable to retrieve row for ID " + (String)bt.getTag(), Toast.LENGTH_SHORT).show(); 如果(!cursor.moveToFirst){Toast.makeText(this,“无法检索ID的行” +(String)bt.getTag(),Toast.LENGTH_SHORT).show(); return; 返回; } }
without the above code. 没有上面的代码。 The cursor will be at position -1 (before the first row). 光标将在位置-1 (第一行之前)。 So the cursor.moveToFirst is need to position to the extracted row (should only be the one row). 因此, cursor.moveToFirst需要定位到提取的行(只能是一行)。 If there are no rows the moveToFirst will return false (the move could not be done) and the Toast will be issued and then the onClick method will return. 如果没有行,则moveToFirst将返回false(无法完成移动),并且将发出Toast,然后将返回onClick方法。
Here's a working Example App based upon your previous question and also this question. 这是一个基于您之前的问题以及这个问题的示例应用程序。
However, 然而,
button click handling, is handled without using the layout's onCLick (as coded in the XML) but is set in the bindView method of the custom CursorAdapter ( MyCursorAdapter.java ). 按钮单击处理,无需使用布局的onCLick (如XML中的编码)即可处理,但可以在自定义CursorAdapter ( MyCursorAdapter.java )的bindView方法中进行设置。
it demonstrates 3 methods of getting the id associated with the button 它演示了获得与按钮关联的ID的3种方法
The handling allows rows to be deleted and updated (albeit that update is pretty rudimentary, just appends a value rather than using a customised dialog layout(you appear to have a grasp on this aspect)). 这种处理允许删除和更新行(尽管更新非常基本,只是附加一个值,而不是使用自定义的对话框布局(您似乎对此有所了解))。
Unlike the previous answer, handling added rows (albeit with limited values) is also implemented. 与先前的答案不同,还实现了处理添加的行(尽管值有限)。
The resultant App looks like :- 生成的应用程序看起来像:
If the EDIT OR DELETE button is clicked the dialog appears eg :- 如果单击“ 编辑或删除”按钮,则会出现对话框,例如:-
:- :-
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<TextView
android:id="@+id/panelup"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="LIST SQ1"
/>
<ListView
android:id="@+id/contentlist"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_below="@id/panelup"
android:layout_above="@id/paneldown"/>
<LinearLayout
android:id="@+id/paneldown"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true">
<EditText
android:id="@+id/name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
/>
<EditText
android:id="@+id/quantity"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="number"
android:layout_weight="2"
/>
<Spinner
android:id="@+id/mu"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:entries="@array/mu_values"
android:layout_weight="2"
/>
<Button
android:id="@+id/add"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="2"
android:text="+"
/>
</LinearLayout>
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<LinearLayout
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/layoutmain"
>
<TextView
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:padding="2dip"
android:text="M"/>
<TextView
android:id="@+id/id"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:padding="2dip"
android:paddingRight="10dip"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:padding="2dip"
android:paddingRight="10dip"
android:text="-" />
<TextView
android:id="@+id/name"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="2dip"/>
</LinearLayout>
<TextView
android:id="@+id/quantity"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:padding="2dip"/>
<CheckBox
android:id="@+id/checkboxmain2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:visibility="gone"/>
<Button
android:id="@+id/editordelete"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="EDIT or DELETE"/>
</LinearLayout>
public class SQLiteHelper extends SQLiteOpenHelper {
public static final String MYDATABASE_NAME = "mydatabase";
public static final int MYDATABASE_VERSION = 1;
public static final String MYDATABASE_TABLE = "mytable";
SQLiteDatabase mDB;
public SQLiteHelper(Context context, String name, SQLiteDatabase.CursorFactory factory,int version) {
super(context, name, factory, version);
mDB = this.getWritableDatabase();
}
@Override
public void onCreate(SQLiteDatabase db) {
String crt_tbl_sql = "CREATE TABLE IF NOT EXISTS " + MYDATABASE_TABLE + "(" +
SQLiteAdapter._id + " INTEGER PRIMARY KEY, " +
SQLiteAdapter.KEY_NAME + " TEXT, " +
SQLiteAdapter.KEY_SHOP + " TEXT, " +
SQLiteAdapter.KEY_PDATE + " TEXT, " +
SQLiteAdapter.KEY_PRICE + " REAL, " +
SQLiteAdapter.KEY_QUANTITY + " INTEGER, " +
SQLiteAdapter.KEY_MU + " TEXT, " +
SQLiteAdapter.KEY_CHECKED + " INTEGER DEFAULT 0" +
")";
db.execSQL(crt_tbl_sql);
addSomeTestingData(db,10);
}
@Override
public void onConfigure(SQLiteDatabase db) {
super.onConfigure(db);
db.setForeignKeyConstraintsEnabled(true);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
}
public long addRow(String name, String shop, String pdate, double price, int quantity, String mu, SQLiteDatabase db) {
ContentValues cv = new ContentValues();
cv.put(SQLiteAdapter.KEY_NAME,name);
cv.put(SQLiteAdapter.KEY_SHOP,shop);
cv.put(SQLiteAdapter.KEY_PDATE,pdate);
cv.put(SQLiteAdapter.KEY_PRICE,price);
cv.put(SQLiteAdapter.KEY_QUANTITY,quantity);
cv.put(SQLiteAdapter.KEY_MU,mu);
return db.insert(MYDATABASE_TABLE,null,cv);
}
private void addSomeTestingData(SQLiteDatabase db, int number_to_add) {
for (int i = 0; i < number_to_add;i++) {
String suffix = String.valueOf(i);
String day_in_month = suffix;
if (i < 10) {
day_in_month = "0" + day_in_month;
}
addRow(
"Test" + suffix,
"Shop" + suffix,
"2019-01-" + day_in_month,
10.5 + new Double(i * 3),
i * 4,
"mu" + suffix,
db
);
}
}
}
public class SQLiteAdapter {
SQLiteDatabase sqLiteDatabase;
SQLiteHelper sqLiteHelper;
Context context;
public static final String KEY_CHECKED = "checked";
public static final String _id = BaseColumns._ID;
public static final String KEY_NAME = "name";
public static final String KEY_QUANTITY = "quantity";
public static final String KEY_PRICE = "price";
public static final String KEY_MU = "mu";
public static final String KEY_PDATE = "pdate";
public static final String KEY_SHOP = "shop";
public SQLiteAdapter(Context context) {
this.context = context;
openToWrite();
}
public SQLiteAdapter openToWrite() throws android.database.SQLException {
sqLiteHelper = new SQLiteHelper(context, MYDATABASE_NAME, null,
MYDATABASE_VERSION);
sqLiteDatabase = sqLiteHelper.getWritableDatabase();
return this;
}
public void close() {
sqLiteHelper.close();
}
public long insertChecked(boolean data1) {
ContentValues contentValues = new ContentValues();
contentValues.put(KEY_CHECKED, data1);
return sqLiteDatabase.insert(MYDATABASE_TABLE, null, contentValues);
}
public int updateChecked(long id,int check) {
ContentValues cv = new ContentValues();
cv.put(KEY_CHECKED,check);
String whereclause = _id + "=?";
String[] whereargs = new String[]{String.valueOf(id)};
return sqLiteDatabase.update(MYDATABASE_TABLE,cv,whereclause,whereargs);
}
public Cursor queueAll() {
String[] columns = new String[]{_id, KEY_NAME, KEY_PRICE,
KEY_QUANTITY, KEY_MU,
KEY_PDATE, KEY_SHOP, KEY_CHECKED};
Cursor cursor = sqLiteDatabase.query(MYDATABASE_TABLE, columns,
null, null, null, null, null);
return cursor;
}
public Cursor queueOneById(long id) {
String whereclause = _id + "=?";
String[] whereargs = new String[]{String.valueOf(id)};
String[] columns = new String[]{_id, KEY_NAME, KEY_PRICE,
KEY_QUANTITY, KEY_MU,
KEY_PDATE, KEY_SHOP, KEY_CHECKED};
return sqLiteDatabase.query(MYDATABASE_TABLE,columns,whereclause,whereargs,
null,null,null);
}
public int delete(long id) {
String whereclause = SQLiteAdapter._id + "=?";
String[] wherargs = new String[]{String.valueOf(id)};
return sqLiteDatabase.delete(MYDATABASE_TABLE,whereclause,wherargs);
}
public long updateById(long id, String column_to_change, String newvalue) {
ContentValues cv = new ContentValues();
cv.put(column_to_change,newvalue);
String whereclause = SQLiteAdapter._id + "=?";
String[] whereargs = new String[]{String.valueOf(id)};
return sqLiteDatabase.update(MYDATABASE_TABLE,cv,whereclause,whereargs);
}
}
public class MyCursorAdapter extends CursorAdapter {
SQLiteAdapter sqliteAdapter;
MyCursorAdapter thisCursorAdapter;
public MyCursorAdapter(Context context, Cursor c) {
super(context, c, true);
sqliteAdapter = new SQLiteAdapter(context);
thisCursorAdapter = this;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View v = super.getView(position, convertView, parent);
return v;
}
@Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
return LayoutInflater.from(context).inflate(R.layout.row,parent,false);
}
@Override
public void bindView(View view, Context context, final Cursor cursor) {
//Note Cursor will be positioned appropriately
TextView name = (TextView) view.findViewById(R.id.name);
TextView id = (TextView) view.findViewById(R.id.id);
TextView quantity = (TextView) view.findViewById(R.id.quantity);
CheckBox cb = (CheckBox) view.findViewById(R.id.checkboxmain2);
Button eod = (Button) view.findViewById(R.id.editordelete);
name.setText(cursor.getString(cursor.getColumnIndex(SQLiteAdapter.KEY_NAME)));
id.setText(cursor.getString(cursor.getColumnIndex(SQLiteAdapter._id)));
quantity.setText(cursor.getString(cursor.getColumnIndex(SQLiteAdapter.KEY_QUANTITY)));
cb.setChecked(cursor.getInt(cursor.getColumnIndex(SQLiteAdapter.KEY_CHECKED)) > 0);
cb.setTag(cursor.getString(cursor.getColumnIndex(SQLiteAdapter._id))); //<<<<<<<<<< SET TAG to the ID
eod.setTag(cursor.getString(cursor.getColumnIndex(SQLiteAdapter._id)));
// dynamically add the listeners as opposed to coding onCLick in layout XML
eod.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// get the id from the id TextView, within the view hierarchy rather than from the buttons tag
// NOTE assumes the Button's parent is a LinearLayout (for simplicity)
// This in theory is the recommended way rather than setting the tag
LinearLayout ll = (LinearLayout) v.getParent();
TextView id = ll.findViewById(R.id.id), name = ll.findViewById(R.id.name);
final long item_id_fromview = Long.valueOf(id.getText().toString());
final String item_name = name.getText().toString();
// get the id from the tag
long item_id_fromtag = Long.valueOf(v.getTag().toString());
// get the if from the cursor that is the source of the Listview, it should be positioned accordingly
long item_id_fromcursor = cursor.getLong(cursor.getColumnIndex(SQLiteAdapter._id));
// Show both
Toast.makeText(v.getContext(),
"The id (from the view hierarchy) is " + String.valueOf(item_id_fromview) +
" or (from the tag) is " + String.valueOf(item_id_fromtag) +
" or (from the cursor) is" + String.valueOf(item_id_fromcursor)
, Toast.LENGTH_SHORT).show();
AlertDialog.Builder mydialog = new AlertDialog.Builder(v.getContext());
mydialog.setMessage("EDIT or DELETE Row:- ID: " + String.valueOf(item_id_fromview) + "Name: " + item_name);
mydialog.setPositiveButton("DELETE", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
sqliteAdapter.delete(item_id_fromview);
refreshList();
}
});
mydialog.setNeutralButton("EDIT", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
sqliteAdapter.updateById(item_id_fromview,SQLiteAdapter.KEY_NAME,item_name + " Updated");
refreshList();
}
});
mydialog.setNegativeButton("CANCEL", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
});
mydialog.show();
}
});
}
private void refreshList() {
thisCursorAdapter.swapCursor(sqliteAdapter.queueAll());
thisCursorAdapter.notifyDataSetChanged();
}
}
public class AndroidSQLite extends AppCompatActivity {
ListView listContent;
Button buttonAdd;
Cursor cursor;
SQLiteAdapter mySQLiteAdapter;
EditText name, quantity;
Spinner mu;
//SimpleCursorAdapter cursorAdapter; //<<<<<<<<<< NOT USED ANYMORE
MyCursorAdapter myadapter; //<<<<<<<<<< Use a custom adapter that sets the tag of the checkbox to the respective id
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listContent = (ListView) findViewById(R.id.contentlist);
name = (EditText) findViewById(R.id.name);
quantity = (EditText) findViewById(R.id.quantity);
buttonAdd = (Button) findViewById(R.id.add);
mu = (Spinner) findViewById(R.id.mu);
handleAddButton();
mySQLiteAdapter = new SQLiteAdapter(this);
mySQLiteAdapter.openToWrite();
manageListView(); //<<<<<<<<<< ADDED
}
//<<<<<<<<<< ADDED >>>>>>>>>>
@Override
protected void onResume() {
super.onResume();
manageListView(); //Refresh the List when resuming e.g. returning from another activity
}
@Override
protected void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
cursor.close(); //<<<<<<<<<< SHOULD ALWAYS CLOSE CURSOR
mySQLiteAdapter.close();
}
private void handleAddButton() {
buttonAdd.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if ((name.getText().toString()).length() < 1) {
Toast.makeText(v.getContext(),"Name cannot be empty",Toast.LENGTH_SHORT).show();
name.requestFocus();
return;
}
if ((quantity.getText().toString()).length() < 1) {
Toast.makeText(v.getContext(),"Quantity cannot be empty",Toast.LENGTH_SHORT).show();
quantity.requestFocus();
return;
}
mySQLiteAdapter.sqLiteHelper.addRow(
name.getText().toString(),
// Arbritary values for testing
"2019-01-01",
"The Shop",
100.33,
Integer.valueOf(quantity.getText().toString()),
mu.getSelectedItem().toString(),
mySQLiteAdapter.sqLiteDatabase
);
manageListView();
}
});
}
private void manageListView() {
cursor = mySQLiteAdapter.queueAll(); // get the source data (cursor) for the listview
if (myadapter == null) {
myadapter = new MyCursorAdapter(this,cursor);
listContent.setAdapter(myadapter);
} else {
myadapter.swapCursor(cursor);
}
}
}
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