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Приклад проходу по результуючому об’єкту Cursor, витягуючи і підсумовуючи стовпці зі значеннями типу float

package com.example.myapplication;

public void onCreate(Bundle savedInstanceState){

float totalHoard = 0f;

if (myGold.moveToFirst()) {

do {

float hoard = myGold.getFloat(GOLD_HOARDED_COLUMN);

totalHoard += hoard;

} while(myGold.moveToNext());

}

float averageHoard = totalHoard / myGold.getCount();};

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resources>

int GOLD_HOARDED_COLUMN = 2;

Cursor myGold = myDatabase.query("GoldHoards", null, null, null, null,

null, null);

float totalHoard = 0f;

if (myGold.moveToFirst()) {

do {

❌

int GOLD_HOARDED_COLUMN = 2;

Cursor myGold = myDatabase.query("GoldHoards", null, null, null, null,

null, null);

float totalHoard = 0f;

if (myGold.moveToFirst()) {

do {

float hoard = myGold.getFloat(GOLD_HOARDED_COLUMN);

totalHoard += hoard;

} while(myGold.moveToNext());

}

float averageHoard = totalHoard / myGold.getCount();

✅

int GOLD_HOARDED_COLUMN = 2;

Cursor myGold = myDatabase.query("GoldHoards", null, null, null, null,

null, null);

float totalHoard = 0f;

if (myGold.moveToFirst()) {

do {

android:layout_width=“match_parent”

android:text=“Button1”

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import android.app.Activity;

Cursor myGold = myDatabase.query("GoldHoards", null, null, null, null,

null, null);

float totalHoard = 0f;

if (myGold.moveToFirst()) {

do {

float hoard = myGold.getFloat(GOLD_HOARDED_COLUMN);

totalHoard += hoard;

android:text=“Button1”

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Програмування для мобільних додатків

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