constraints

azzumw · Mar 3, 2022 · 37f893f · 37f893f
1 parent bdc13f9
commit 37f893f
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Showing 2 changed files with 35 additions and 1 deletion.
diff --git a/android-workmanager-start_kotlin/app/src/main/java/com/example/background/BlurActivity.kt b/android-workmanager-start_kotlin/app/src/main/java/com/example/background/BlurActivity.kt
@@ -16,6 +16,7 @@
 
 package com.example.background
 
+import android.content.Intent
 import android.os.Bundle
 import android.view.View
 import androidx.activity.viewModels
@@ -42,6 +43,19 @@ class BlurActivity : AppCompatActivity() {
         viewModel.outputWorkInfos.observe(this, workInfosObserver())
 
         binding.goButton.setOnClickListener { viewModel.applyBlur(blurLevel) }
+
+        // Setup view output image file button
+        binding.seeFileButton.setOnClickListener {
+            viewModel.outputUri?.let { currentUri ->
+                val actionView = Intent(Intent.ACTION_VIEW, currentUri)
+                actionView.resolveActivity(packageManager)?.run {
+                    startActivity(actionView)
+                }
+            }
+        }
+
+        // Hookup the Cancel button
+        binding.cancelButton.setOnClickListener { viewModel.cancelWork() }
     }
 
     /**
@@ -95,7 +109,17 @@ class BlurActivity : AppCompatActivity() {
 
             if (workInfo.state.isFinished) {
                 showWorkFinished()
-            } else {
+                // Normally this processing, which is not directly related to drawing views on
+                // screen would be in the ViewModel. For simplicity we are keeping it here.
+                val outputImageUri = workInfo.outputData.getString(KEY_IMAGE_URI)
+
+                // If there is an output file show "See File" button
+                if (!outputImageUri.isNullOrEmpty()) {
+                    viewModel.setOutputUri(outputImageUri)
+                    binding.seeFileButton.visibility = View.VISIBLE
+                }
+            }
+             else {
                 showWorkInProgress()
             }
         }

diff --git a/android-workmanager-start_kotlin/app/src/main/java/com/example/background/BlurViewModel.kt b/android-workmanager-start_kotlin/app/src/main/java/com/example/background/BlurViewModel.kt
@@ -49,6 +49,11 @@ class BlurViewModel(application: Application) : ViewModel() {
      * @param blurLevel The amount to blur the image
      */
     internal fun applyBlur(blurLevel: Int) {
+
+        // Create charging constraint
+        val constraints = Constraints.Builder()
+            .setRequiresCharging(true)
+            .build()
         // Add WorkRequest to Cleanup temporary images
         var continuation = workManager
             .beginUniqueWork(
@@ -73,6 +78,7 @@ class BlurViewModel(application: Application) : ViewModel() {
 
         // Add WorkRequest to save the image to the filesystem
         val save = OneTimeWorkRequestBuilder<SaveImageToFileWorker>()
+            .setConstraints(constraints)
             .addTag(TAG_OUTPUT)
             .build()
 
@@ -119,6 +125,10 @@ class BlurViewModel(application: Application) : ViewModel() {
         outputUri = uriOrNull(outputImageUri)
     }
 
+    internal fun cancelWork() {
+        workManager.cancelUniqueWork(IMAGE_MANIPULATION_WORK_NAME)
+    }
+
     class BlurViewModelFactory(private val application: Application) : ViewModelProvider.Factory {
 
         override fun <T : ViewModel?> create(modelClass: Class<T>): T {