Added video capture timer and fixed crashing bug when device is rotat…

…ed while recording video

android-libproofcam/src/main/AndroidManifest.xml

@@ -25,6 +25,8 @@
             android:name=".CameraActivity"
             android:exported="true"
             android:label="@string/app_name"
+            android:configChanges="orientation|screenSize|screenLayout|keyboardHidden"
+            android:windowSoftInputMode="adjustNothing"
             android:theme="@style/AppTheme.NoActionBar">
             <intent-filter>
                 <action android:name="android.media.action.IMAGE_CAPTURE" />

android-libproofcam/src/main/java/org/witness/proofmode/camera/fragments/CameraFragment.kt

@@ -64,7 +64,7 @@ class CameraFragment : BaseFragment<FragmentCameraBinding>(R.layout.fragment_cam
     private lateinit var pinchToZoomDetector: ScaleGestureDetector
     private lateinit var context: Context
 
-    private val lensViewModel: CameraLensViewModel by activityViewModels()
+    private val lensViewModel: CameraViewModel by activityViewModels()
 
 
     // An instance for display manager to get display change callbacks

android-libproofcam/src/main/java/org/witness/proofmode/camera/fragments/CameraViewModel.kt

@@ -0,0 +1,66 @@
+package org.witness.proofmode.camera.fragments
+
+import android.os.Handler
+import android.os.Looper
+import androidx.camera.core.CameraSelector
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.ViewModel
+import java.util.Locale
+
+class CameraViewModel : ViewModel() {
+    var lensFacing: MutableLiveData<Int> = MutableLiveData(CameraSelector.LENS_FACING_BACK)
+        private set
+    private val handler = Handler(Looper.getMainLooper())
+    private lateinit var timerRunnable: Runnable
+    private var startTime: Long = 0
+
+    // LiveData to expose the elapsed time
+    private val _elapsedTime = MutableLiveData<String>()
+    val elapsedTime: LiveData<String> get() = _elapsedTime
+
+
+
+    fun toggleLensFacing() {
+        lensFacing.value = if (lensFacing.value == CameraSelector.LENS_FACING_BACK) {
+            CameraSelector.LENS_FACING_FRONT
+        } else {
+            CameraSelector.LENS_FACING_BACK
+        }
+    }
+
+    // Format the elapsed time
+    private fun formatElapsedTime(elapsedTime: Long): String {
+        val hours = (elapsedTime / 3600000).toInt()
+        val minutes = (elapsedTime % 3600000 / 60000).toInt()
+        val seconds = (elapsedTime % 60000 / 1000).toInt()
+
+        return if (hours > 0) {
+            String.format(Locale.getDefault(), "%02d:%02d:%02d", hours, minutes, seconds)
+        } else {
+            String.format(Locale.getDefault(),"%02d:%02d", minutes, seconds)
+        }
+    }
+
+    fun stopTimer() {
+        handler.removeCallbacks(timerRunnable)
+        _elapsedTime.value = "00:00:00" // Reset the timer
+    }
+    fun startTimer() {
+        startTime = System.currentTimeMillis()
+        timerRunnable = object : Runnable {
+            override fun run() {
+                val timeDelta = System.currentTimeMillis() - startTime
+                _elapsedTime.postValue(formatElapsedTime(timeDelta))
+                handler.postDelayed(this, 1000)
+
+            }
+        }
+        handler.post(timerRunnable)
+    }
+
+    override fun onCleared() {
+        handler.removeCallbacks(timerRunnable)
+        super.onCleared()
+    }
+}

android-libproofcam/src/main/java/org/witness/proofmode/camera/fragments/VideoFragment.kt

@@ -6,7 +6,6 @@ import android.content.ContentValues
 import android.content.Context
 import android.content.Intent
 import android.content.res.Configuration
-import android.database.Cursor
 import android.hardware.display.DisplayManager
 import android.net.Uri
 import android.os.Build
@@ -58,7 +57,7 @@ class VideoFragment : BaseFragment<FragmentVideoBinding>(R.layout.fragment_video
     private lateinit var tapDetector: GestureDetector
     private lateinit var pinchToZoomDetector: ScaleGestureDetector
     private lateinit var viewFinder: PreviewView
-    private val lensViewModel: CameraLensViewModel by activityViewModels()
+    private val cameraViewModel: CameraViewModel by activityViewModels()
     private lateinit var context: Context
 
     // An instance for display manager to get display change callbacks
@@ -183,6 +182,11 @@ class VideoFragment : BaseFragment<FragmentVideoBinding>(R.layout.fragment_video
                 tapDetector.onTouchEvent(motionEvent)
                 return@setOnTouchListener true
             }
+
+            cameraViewModel.elapsedTime.observe(viewLifecycleOwner) { time->
+                binding.chipTimer?.text = time
+
+            }
         }
     }
 
@@ -223,7 +227,7 @@ class VideoFragment : BaseFragment<FragmentVideoBinding>(R.layout.fragment_video
      *  toggleButton() function is an Extension function made to animate button rotation
      * */
     private fun toggleCamera() = binding.btnSwitchCamera.toggleButton(
-        flag = lensViewModel.lensFacing.value == CameraSelector.LENS_FACING_BACK,
+        flag = cameraViewModel.lensFacing.value == CameraSelector.LENS_FACING_BACK,
         rotationAngle = 180f,
         firstIcon = R.drawable.ic_outline_camera_rear,
         secondIcon = R.drawable.ic_outline_camera_front,
@@ -236,7 +240,7 @@ class VideoFragment : BaseFragment<FragmentVideoBinding>(R.layout.fragment_video
             ).show()
             return@toggleButton
         } else {
-            lensViewModel.toggleLensFacing()
+            cameraViewModel.toggleLensFacing()
             startCamera()
         }
 
@@ -282,7 +286,7 @@ class VideoFragment : BaseFragment<FragmentVideoBinding>(R.layout.fragment_video
                 // Bind all use cases to the camera with lifecycle
                 val selector = CameraSelector.Builder()
                     .requireLensFacing(
-                        lensViewModel.lensFacing.value ?: CameraSelector.LENS_FACING_BACK
+                        cameraViewModel.lensFacing.value ?: CameraSelector.LENS_FACING_BACK
                     )
                     .build()
                 camera = localCameraProvider.bindToLifecycle(
@@ -363,6 +367,8 @@ class VideoFragment : BaseFragment<FragmentVideoBinding>(R.layout.fragment_video
 
         if (!isRecording) {
             animateRecord.start()
+            binding.chipTimer?.visibility = View.VISIBLE
+            cameraViewModel.startTimer()
             localVideoCapture.startRecording(
                 outputOptions, // the options needed for the final video
                 requireContext().mainExecutor(), // the executor, on which the task will run
@@ -422,6 +428,9 @@ class VideoFragment : BaseFragment<FragmentVideoBinding>(R.layout.fragment_video
         } else {
             animateRecord.cancel()
             localVideoCapture.stopRecording()
+            cameraViewModel.stopTimer()
+            binding.chipTimer?.visibility = View.GONE
+
         }
         isRecording = !isRecording
     }

android-libproofcam/src/main/res/layout-land/fragment_video.xml

@@ -20,6 +20,7 @@
         android:layout_width="0dp"
         android:layout_height="0dp"
         android:alpha="0.4"
+        android:id="@+id/view"
         android:background="@android:color/black"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
@@ -37,6 +38,19 @@
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintTop_toTopOf="parent" />
 
+    <com.google.android.material.chip.Chip
+        android:id="@+id/chipTimer"
+        android:elevation="@dimen/half_margin"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        android:layout_width="wrap_content"
+        android:visibility="gone"
+        tools:visibility="visible"
+        app:chipBackgroundColor="@android:color/holo_red_light"
+        android:layout_marginBottom="@dimen/half_margin"
+        app:layout_constraintTop_toBottomOf="@+id/btnRecordVideo"
+        android:layout_height="wrap_content" />
+
 
     <ImageButton
         android:id="@+id/btnExit"

android-libproofcam/src/main/res/layout/fragment_video.xml

@@ -17,6 +17,19 @@
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent" />
 
+    <com.google.android.material.chip.Chip
+        android:id="@+id/chipTimer"
+        android:elevation="@dimen/half_margin"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        android:layout_width="wrap_content"
+        android:visibility="gone"
+        app:chipBackgroundColor="@android:color/holo_red_light"
+        android:layout_marginBottom="@dimen/half_margin"
+        app:layout_constraintBottom_toTopOf="@id/view"
+        android:layout_height="wrap_content" />
+
+
     <View
         android:id="@+id/view"
         android:layout_width="0dp"