Android: Switch Height and Width when View change orientation

Question

I do use PhotoView library to ZoomIn-Out. now when user click a button i prepared to rotate the PhotoView, Height and Width would rotate. so width which is smaller than the screen Height. and this result in i can't get the full screen zoom like usual before Rotating the Imageview.

so any solution to make the new width or height after rotation to take full screen.

Example : this is Zoomed Image it doesn't zoom in the entire screen like before the rotation

Answer 1

I had to work with the same type of feature on my project and here was my design and implementation for it.

Basic XML design for photo view

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    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">

    <com.github.chrisbanes.photoview.PhotoView
        android:id="@+id/image_main"
        android:layout_width="0dp"
        android:scaleType="centerCrop"
        android:layout_height="400dp"
        android:src="@drawable/gull_portrait_ca_usa"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
    <ImageView
        android:id="@+id/image_rotate"
        android:src="@android:drawable/ic_menu_rotate"
        android:layout_margin="16dp"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        android:layout_width="40dp"
        android:layout_height="40dp"/>

</androidx.constraintlayout.widget.ConstraintLayout>

Then I just update the orientation onClick event.

class MainActivity : AppCompatActivity() {
    private lateinit var binding: ActivityMainBinding
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        binding = ActivityMainBinding.inflate(layoutInflater)
        setContentView(binding.root)
        binding.imageRotate.setOnClickListener {
            binding.imageMain.rotation = binding.imageMain.rotation+90
        }

    }
}

Output