2-Laboratoriya ishi Mavzu: Java tilida obyektga yo’naltirilgan dasturlash tamoyillari

2-Laboratoriya ishi

Mavzu: Java tilida obyektga yo’naltirilgan dasturlash tamoyillari

2-Laboratoriya ishida kalkulyator yasash hisoblanib bunda quyidagi amallarni bajaraniz:

XML qismi:

xmlns:app="http://schemas.android.com/apk/res-auto"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

tools:context=".MainActivity">

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="Result :"

android:textSize="30sp"

app:layout_constraintTop_toTopOf="parent"

app:layout_constraintLeft_toLeftOf="parent"

app:layout_constraintRight_toRightOf="parent"

app:layout_constraintBottom_toBottomOf="parent"

app:layout_constraintVertical_bias="0.3"

app:layout_constraintHorizontal_bias="0.25"/>

android:id="@+id/result"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text=""

android:textSize="30sp"

app:layout_constraintTop_toTopOf="parent"

app:layout_constraintLeft_toLeftOf="parent"

app:layout_constraintRight_toRightOf="parent"

app:layout_constraintBottom_toBottomOf="parent"

app:layout_constraintVertical_bias="0.3"

app:layout_constraintHorizontal_bias="0.6"/>

android:id="@+id/firstNumber"

android:layout_width="150dp"

android:layout_height="wrap_content"

tools:text="First number"

app:layout_constraintTop_toTopOf="parent"

app:layout_constraintLeft_toLeftOf="parent"

app:layout_constraintRight_toRightOf="parent"

app:layout_constraintBottom_toBottomOf="parent"/>

android:id="@+id/secondNumber"

android:layout_width="150dp"

android:layout_height="wrap_content"

tools:text="Second number"

app:layout_constraintTop_toBottomOf="@id/result"

app:layout_constraintLeft_toLeftOf="parent"

app:layout_constraintRight_toRightOf="parent"

app:layout_constraintBottom_toBottomOf="parent"

app:layout_constraintVertical_bias="0.4"/>

android:id="@+id/plus"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="+"

android:textSize="24sp"

app:layout_constraintTop_toTopOf="parent"

app:layout_constraintLeft_toLeftOf="parent"

app:layout_constraintRight_toLeftOf="@id/multiplys"

app:layout_constraintBottom_toBottomOf="parent"

app:layout_constraintVertical_bias="0.7"/>

android:id="@+id/multiplys"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="*"

android:textSize="24sp"

app:layout_constraintTop_toTopOf="parent"

app:layout_constraintLeft_toRightOf="@id/plus"

app:layout_constraintRight_toRightOf="parent"

app:layout_constraintBottom_toBottomOf="parent"

app:layout_constraintVertical_bias="0.7"

/>

android:id="@+id/minus"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="-"

android:textSize="24sp"

app:layout_constraintTop_toTopOf="parent"

app:layout_constraintLeft_toLeftOf="parent"

app:layout_constraintRight_toLeftOf="@id/division"

app:layout_constraintBottom_toBottomOf="parent"

app:layout_constraintVertical_bias="0.8"/>

android:id="@+id/division"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="/"

android:textSize="24sp"

app:layout_constraintTop_toTopOf="parent"

app:layout_constraintLeft_toRightOf="@id/minus"

app:layout_constraintRight_toRightOf="parent"

app:layout_constraintBottom_toBottomOf="parent"

app:layout_constraintVertical_bias="0.8"

/>

android:id="@+id/clear_texts"
android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="C"

android:textSize="24sp"

app:layout_constraintTop_toTopOf="parent"

app:layout_constraintLeft_toLeftOf="parent"

app:layout_constraintRight_toRightOf="parent"

app:layout_constraintBottom_toBottomOf="parent"

app:layout_constraintVertical_bias="0.9"

/>

Java code qismida esa quyidagi amallarni bajaramiz: