下面是我编写的草稿代码,用于选择列表视图中的项目并将其传递到另一个页面进行编辑。好的,现在在列表视图中,1项包括ID,身体温度,心率和BMI。现在,当我选择它们时,它们应该通过意图将值传递到另一个页面,我可以删除整个项目,因此它将完全从数据库中删除或者我可以编辑体温,心率和BMI。 ID我可以把它留作textview。但是现在我甚至无法选择它的项目来将值传递给另一个页面。请指教。
/*Codes for selecting and passing values to edit page*/
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
String BTemp = adapterView.getItemAtPosition(i).toString();
String HRate = adapterView.getItemAtPosition(i).toString();
String Bmi = adapterView.getItemAtPosition(i).toString();
Cursor data = dbhelper.getRecID(BTemp, HRate, Bmi);
int recID = -1;
while(data.moveToNext()){
recID = data.getInt(0);
}
if(recID > -1){
Intent editScreenIntent = new Intent(ViewRecords.this, EditDel.class);
editScreenIntent.putExtra("id",recID);
editScreenIntent.putExtra("Body Temperature",BTemp);
editScreenIntent.putExtra("Heart Rate",HRate);
editScreenIntent.putExtra("BMI",Bmi);
startActivity(editScreenIntent);
}
else{
Toast.makeText(getApplicationContext(), "No ID Associated", Toast.LENGTH_LONG).show();
}
/* DatabaseHelper.java*/
public Cursor getRecID(String BTemp, String Hrate, String Bmi){
SQLiteDatabase db = this.getWritableDatabase();
String query = "SELECT " + COL1 + " FROM " + TABLE_NAME +
" WHERE " + COL2 + " = '" + BTemp + "' AND " + COL3 + " = '" + Hrate + "' AND " + COL4 + " = '" + Bmi +"'";
Cursor data = db.rawQuery(query, null);
return data;
}