哔哔one
以下是处理 ListView 项中视图的单击事件的一种相对简单的方法。要简单地获取已单击以将其与另一个项目区分开来的实际项目，您需要一个自定义适配器，在本例中为自定义光标适配器，您可以在其中将视图的标记设置为适当的值（id）。同时，您可以使用 onClick 属性来指定单击视图（复选框）时要调用的方法，该方法在“活动”中定义。下面是基于您的代码的工作示例。它使用更简单，更灵活的方法来管理列表视图，即管理列表视图请注意，为方便起见，您的某些代码已被省略（注释掉）。守则行.xml<?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:onClick="ListViewCheckBoxHanlder"/></LinearLayout>记下对复选框所做的更改activity_main.xml<?xml version="1.0" encoding="utf-8"?><RelativeLayout 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"/> <CheckBox android:id="@+id/checkboxmain1" android:layout_width="wrap_content" android:layout_height="wrap_content" /> <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: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></RelativeLayout>安卓QLite.javapublic class AndroidSQLite extends AppCompatActivity { CheckBox checkBoxMain; ListView listContent; Button buttonAdd; Cursor cursor; SQLiteAdapter mySQLiteAdapter; //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); checkBoxMain = (CheckBox)findViewById(R.id.checkboxmain1); listContent = (ListView)findViewById(R.id.contentlist); mySQLiteAdapter = new SQLiteAdapter(this); mySQLiteAdapter.openToWrite(); manageListView(); //<<<<<<<<<< ADDED /* !!!!!!!!! COMMENTED OUT cursor = mySQLiteAdapter.queueAll(); String[] from = new String[]{SQLiteAdapter._id, SQLiteAdapter.KEY_NAME, SQLiteAdapter.KEY_QUANTITY, SQLiteAdapter.KEY_CHECKED}; int[] to = new int[]{R.id.id, R.id.name, R.id.quantity, R.id.checkboxmain2}; cursorAdapter = new SimpleCursorAdapter(this, R.layout.row, cursor, from, to,0); listContent.setAdapter(cursorAdapter); listContent.setOnItemClickListener(listContentOnItemClickListener); */ //buttonAdd.setOnClickListener(buttonAddOnClickListener); //<<<<<<<<<<< you want this back in } //<<<<<<<<<< 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(); } //<<<<<<<<<< NO LONGER USED >>>>>>>>>> private void updateList(){ cursor = mySQLiteAdapter.queueAll(); myadapter.swapCursor(cursor); } //<<<<<<<< NOTE NOT USED but you'd want this to be used CheckBox.OnClickListener onCheckboxClicked = new CheckBox.OnClickListener() { public void onClick(View v) { CheckBox checkBoxMain = (CheckBox) findViewById(R.id.checkboxmain1); boolean checked = checkBoxMain.isChecked(); if (checked) { Boolean data1 = checkBoxMain.isChecked(); mySQLiteAdapter.insertChecked(data1); manageListView(); //<<<<<<<<<< refresh the ListView } } }; //<<<<<<<<<<NOT USED>>>>>>>>>> private ListView.OnItemClickListener listContentOnItemClickListener = new ListView.OnItemClickListener(){ @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { Cursor cursor = (Cursor) parent.getItemAtPosition(position); 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); // when item in row.xml is clicked alertdialog is shown // code of AlertDialog myDialog.show(); updateList(); } }; /**<<<<<<<<<< ADDED >>>>>>>>>>> * Manage the ListView building from new or refreshing the data */ 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); } } /**<<<<<<<<<< ADDED >>>>>>>>>> * Handle the CheckBox being clicked, * NOTE set in the layout * @param v The View */ public void ListViewCheckBoxHanlder(View v) { CheckBox cb = v.findViewById(R.id.checkboxmain2); Toast.makeText(this, "You clicked the CheckBox for ID " + (String) cb.getTag(), Toast.LENGTH_SHORT).show(); int checked = 0; if (cb.isChecked()) { checked = 1; } long id = Long.valueOf((String) cb.getTag()); mySQLiteAdapter.updateChecked(id,checked); manageListView(); }}请注意，为了方便起见，一些被注释掉的代码已被替换掉，一些代码已被注释掉。我的库索适配器.javapublic class MyCursorAdapter extends CursorAdapter { public MyCursorAdapter(Context context, Cursor c) { super(context, c, true); } @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, 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); 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 }} 请注意，以上是一个新类。SQliteadapter.javapublic 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; }}请注意，这很可能是不同的，它是为满足测试而创建的。.javapublic 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 onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { } private 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 ); } }}请注意，这很可能是不同的，它是为满足测试而创建的。结果以下是单击多个复选框后拍摄的屏幕截图，因此将显示 Toast：-以及重新启动应用程序后的屏幕截图（显示状态已保留，即根据复选框更新数据库）：-