[Jetsurvey] Take a selfie

Jetsurvey/app/src/main/AndroidManifest.xml

@@ -23,6 +23,15 @@
         android:label="@string/app_name"
         android:supportsRtl="true"
         android:theme="@style/Theme.Jetsurvey">
+        <provider
+            android:name="androidx.core.content.FileProvider"
+            android:authorities="com.example.graygallery.fileprovider"
+            android:grantUriPermissions="true"
+            android:exported="false">
+            <meta-data
+                android:name="android.support.FILE_PROVIDER_PATHS"
+                android:resource="@xml/filepaths" />
+        </provider>
         <activity
             android:name=".MainActivity"
             android:label="@string/app_name">

Jetsurvey/app/src/main/java/com/example/compose/jetsurvey/survey/SurveyFragment.kt

@@ -20,18 +20,27 @@ import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import androidx.activity.result.contract.ActivityResultContracts
+import androidx.activity.result.contract.ActivityResultContracts.TakePicturePreview
 import androidx.compose.runtime.livedata.observeAsState
 import androidx.compose.ui.platform.ComposeView
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.viewModels
 import com.example.compose.jetsurvey.R
 import com.example.compose.jetsurvey.theme.JetsurveyTheme
 import com.google.android.material.datepicker.MaterialDatePicker
+import java.io.File
 
 class SurveyFragment : Fragment() {
 
     private val viewModel: SurveyViewModel by viewModels { SurveyViewModelFactory() }
 
+    private val imagesFolder: File by lazy { getImagesFolder(requireContext()) }
+
+    private val takePicture = registerForActivityResult(TakePicturePreview()) { bitmap ->
+        viewModel.saveImageFromCamera(bitmap, imagesFolder)
+    }
+
     override fun onCreateView(
         inflater: LayoutInflater,
         container: ViewGroup?,
@@ -86,9 +95,10 @@ class SurveyFragment : Fragment() {
         }
     }
 
+
     @Suppress("UNUSED_PARAMETER")
     private fun takeAPhoto(questionId: Int) {
-        // TODO: unsupported for now
+        takePicture.launch(null)
     }
 
     @Suppress("UNUSED_PARAMETER")

Jetsurvey/app/src/main/java/com/example/compose/jetsurvey/survey/SurveyQuestions.kt

@@ -16,6 +16,7 @@
 
 package com.example.compose.jetsurvey.survey
 
+import androidx.compose.foundation.Image
 import androidx.compose.foundation.BorderStroke
 import androidx.compose.foundation.ScrollableColumn
 import androidx.compose.foundation.background
@@ -25,6 +26,7 @@ import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.defaultMinSizeConstraints
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.preferredHeight
@@ -39,7 +41,6 @@ import androidx.compose.material.RadioButton
 import androidx.compose.material.RadioButtonConstants
 import androidx.compose.material.Slider
 import androidx.compose.material.Surface
-import androidx.compose.material.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.Providers
 import androidx.compose.runtime.getValue
@@ -48,6 +49,7 @@ import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.asImageAsset
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
 import androidx.ui.tooling.preview.Preview
@@ -273,7 +275,12 @@ private fun ActionQuestion(
                     modifier = Modifier.padding(vertical = 20.dp)
                 )
             }
-            is SurveyActionResult.Photo -> TODO()
+            is SurveyActionResult.Photo -> {
+                Image(
+                    asset = answer.result.bitmap.asImageAsset(),
+                    modifier = Modifier.defaultMinSizeConstraints(minWidth = 500.dp, minHeight = 500.dp)
+                )
+            }
             is SurveyActionResult.Contact -> TODO()
         }
     }

Jetsurvey/app/src/main/java/com/example/compose/jetsurvey/survey/SurveyRepository.kt

@@ -21,9 +21,15 @@ import com.example.compose.jetsurvey.survey.PossibleAnswer.Action
 import com.example.compose.jetsurvey.survey.PossibleAnswer.MultipleChoice
 import com.example.compose.jetsurvey.survey.PossibleAnswer.SingleChoice
 import com.example.compose.jetsurvey.survey.SurveyActionType.PICK_DATE
+import com.example.compose.jetsurvey.survey.SurveyActionType.TAKE_PHOTO
 
 // Static data of questions
 private val jetpackQuestions = listOf(
+    Question(
+        id = 975,
+        questionText = R.string.selfie_skills,
+        answer = Action(label = R.string.take_selfie, actionType = TAKE_PHOTO)
+    ),
     Question(
         id = 1,
         questionText = R.string.in_my_free_time,

Jetsurvey/app/src/main/java/com/example/compose/jetsurvey/survey/SurveyViewModel.kt

@@ -16,12 +16,25 @@
 
 package com.example.compose.jetsurvey.survey
 
+import android.content.Context
+import android.content.res.XmlResourceParser
+import android.graphics.Bitmap
+import android.graphics.Canvas
+import android.graphics.Paint
+import android.graphics.Rect
+import android.util.Log
 import androidx.lifecycle.LiveData
 import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.ViewModelProvider
 import androidx.lifecycle.viewModelScope
+import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+import java.io.File
+import java.io.FileOutputStream
+
+private const val FILEPATH_XML_KEY = "files-path"
 
 class SurveyViewModel(private val surveyRepository: SurveyRepository) : ViewModel() {
 
@@ -73,8 +86,53 @@ class SurveyViewModel(private val surveyRepository: SurveyRepository) : ViewMode
             question.enableNext = true
         }
     }
+
+
+    fun saveImageFromCamera(bitmap: Bitmap, imagesFolder: File) {
+        val imageFile = File(imagesFolder, generateFilename("CAMERA"))
+        val imageStream = FileOutputStream(imageFile)
+
+        viewModelScope.launch {
+            withContext(Dispatchers.IO) {
+                try {
+                    bitmap.compress(Bitmap.CompressFormat.JPEG, 100, imageStream)
+                    imageStream.flush()
+                    imageStream.close()
+
+                    Log.d("flo", "Camera image saved")
+
+                } catch (e: Exception) {
+                    Log.e(javaClass.simpleName, "Error writing bitmap", e)
+                }
+            }
+        }
+        updateStateWithActionResult(975, SurveyActionResult.Photo(bitmap))
+    }
 }
 
+fun getImagesFolder(context: Context): File {
+    return File(context.filesDir, "images/").also {
+        if (!it.exists()) {
+            it.mkdir()
+        }
+    }
+}
+
+fun generateFilename(source: String) = "$source-${System.currentTimeMillis()}.jpg"
+
+suspend fun applyGrayscaleFilter(original: Bitmap): Bitmap = withContext(Dispatchers.Default) {
+    val height = original.height
+    val width = original.width
+
+    val modifiedBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565)
+    val canvas = Canvas(modifiedBitmap)
+    val paint = Paint()
+    canvas.drawBitmap(original, null, Rect(0, 0, original.width, original.height), paint)
+
+    modifiedBitmap
+}
+
+
 class SurveyViewModelFactory : ViewModelProvider.Factory {
     @Suppress("UNCHECKED_CAST")
     override fun <T : ViewModel?> create(modelClass: Class<T>): T {

Jetsurvey/app/src/main/res/xml/filepaths.xml

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright 2020 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.
+  -->
+
+<paths>
+    <files-path path="images/" name="grayimages" />
+</paths>