MultipleEventCutter to prevent rapid click on capture button

feature/preview/src/main/java/com/google/jetpackcamera/feature/preview/MultipleEventsCutter.kt

@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.google.jetpackcamera.feature.preview
+
+/**
+ * A helper class that prevents multiple clicks.
+ */
+internal class MultipleEventsCutter {
+ private val now: Long
+ get() = System.currentTimeMillis()
+
+ private var lastEventTimeMs: Long = 0
+
+ fun processEvent(event: () -> Unit) {
+ if (now - lastEventTimeMs >= DURATION_BETWEEN_CLICKS_MS) {
+ event.invoke()
+ }
+ lastEventTimeMs = now
+ }
+
+ companion object {
+ private const val DURATION_BETWEEN_CLICKS_MS = 300L
+ }
+}

feature/preview/src/main/java/com/google/jetpackcamera/feature/preview/PreviewScreen.kt

@@ -199,9 +199,12 @@ fun PreviewScreen(onNavigateToSettings: () -> Unit, viewModel: PreviewViewModel
  )
  }
  }
+ val multipleEventsCutter = remember { MultipleEventsCutter() }
  /*todo: close quick settings on start record/image capture*/
  CaptureButton(
- onClick = { viewModel.captureImage() },
+ onClick = {
+ multipleEventsCutter.processEvent { viewModel.captureImage() }
+ },
  onLongPress = { viewModel.startVideoRecording() },
  onRelease = { viewModel.stopVideoRecording() },
  videoRecordingState = previewUiState.videoRecordingState