Don't read intent when relaunching from history

app/src/androidTest/java/com/todoroo/astrid/activity/MainActivityTest.kt

@@ -0,0 +1,32 @@
+package com.todoroo.astrid.activity
+
+import android.content.Intent
+import android.content.Intent.FLAG_ACTIVITY_LAUNCHED_FROM_HISTORY
+import android.content.Intent.FLAG_ACTIVITY_NEW_TASK
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import com.todoroo.astrid.activity.MainActivity.Companion.isFromHistory
+import org.junit.Assert.assertFalse
+import org.junit.Assert.assertTrue
+import org.junit.Test
+import org.junit.runner.RunWith
+
+@RunWith(AndroidJUnit4::class)
+class MainActivityTest {
+    @Test
+    fun newTaskIsNotFromHistory() {
+        assertFalse(Intent().setFlags(FLAG_ACTIVITY_NEW_TASK).isFromHistory)
+    }
+
+    @Test
+    fun oldTaskIsNotFromHistory() {
+        assertFalse(Intent().setFlags(FLAG_ACTIVITY_LAUNCHED_FROM_HISTORY).isFromHistory)
+    }
+
+    @Test
+    fun newTaskIsFromHistory() {
+        assertTrue(
+                Intent()
+                        .setFlags(FLAG_ACTIVITY_NEW_TASK or FLAG_ACTIVITY_LAUNCHED_FROM_HISTORY)
+                        .isFromHistory)
+    }
+}

app/src/main/java/com/todoroo/astrid/activity/MainActivity.kt

@@ -102,6 +102,7 @@ class MainActivity : InjectingAppCompatActivity(), TaskListFragmentCallbackHandl
                         finishActionMode()
                     }
                 })
+        handleIntent()
     }
 
     public override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
@@ -134,6 +135,7 @@ class MainActivity : InjectingAppCompatActivity(), TaskListFragmentCallbackHandl
     override fun onNewIntent(intent: Intent) {
         super.onNewIntent(intent)
         setIntent(intent)
+        handleIntent()
     }
 
     override fun onSaveInstanceState(outState: Bundle) {
@@ -148,6 +150,9 @@ class MainActivity : InjectingAppCompatActivity(), TaskListFragmentCallbackHandl
 
     private fun getTaskToLoad(filter: Filter?): Task? {
         val intent = intent
+        if (intent.isFromHistory) {
+            return null
+        }
         if (intent.hasExtra(CREATE_TASK)) {
             intent.removeExtra(CREATE_TASK)
             return taskCreator.createWithValues(filter, "")
@@ -171,34 +176,33 @@ class MainActivity : InjectingAppCompatActivity(), TaskListFragmentCallbackHandl
 
     private fun handleIntent() {
         val intent = intent
-        val openFilter = intent.hasExtra(OPEN_FILTER)
+        val openFilter: Filter? =
-        val loadFilter = intent.hasExtra(LOAD_FILTER)
+                if (intent.isFromHistory) null else intent.getParcelableExtra(OPEN_FILTER)
-        if (openFilter || loadFilter) {
+        intent.removeExtra(OPEN_FILTER)
+        val loadFilter = if (intent.isFromHistory) null else intent.getStringExtra(LOAD_FILTER)
+        intent.removeExtra(LOAD_FILTER)
+        if (openFilter != null || loadFilter != null) {
             taskEditFragment?.let {
                 lifecycleScope.launch {
                     it.save()
                 }
             }
         }
-        if (loadFilter || !openFilter && filter == null) {
+        if (!loadFilter.isNullOrBlank() || openFilter == null && filter == null) {
             lifecycleScope.launch {
-                val filterString = intent.getStringExtra(LOAD_FILTER)
+                val filter = if (loadFilter.isNullOrBlank()) {
-                intent.removeExtra(LOAD_FILTER)
-                val filter = if (filterString.isNullOrBlank()) {
                     defaultFilterProvider.getStartupFilter()
                 } else {
-                    defaultFilterProvider.getFilterFromPreference(filterString)
+                    defaultFilterProvider.getFilterFromPreference(loadFilter)
                 }
                 clearUi()
                 openTaskListFragment(filter)
                 openTask(filter)
             }
-        } else if (openFilter) {
+        } else if (openFilter != null) {
-            val filter: Filter? = intent.getParcelableExtra(OPEN_FILTER)
-            intent.removeExtra(OPEN_FILTER)
             clearUi()
-            openTaskListFragment(filter)
+            openTaskListFragment(openFilter)
-            openTask(filter)
+            openTask(openFilter)
         } else {
             val existing = taskListFragment
             openTaskListFragment(
@@ -290,11 +294,6 @@ class MainActivity : InjectingAppCompatActivity(), TaskListFragmentCallbackHandl
         }
     }
 
-    override fun onResumeFragments() {
-        super.onResumeFragments()
-        handleIntent()
-    }
-
     private val nightMode: Int
         get() = resources.configuration.uiMode and Configuration.UI_MODE_NIGHT_MASK
 
@@ -445,5 +444,10 @@ class MainActivity : InjectingAppCompatActivity(), TaskListFragmentCallbackHandl
         private const val FRAG_TAG_TASK_LIST = "frag_tag_task_list"
         private const val FRAG_TAG_WHATS_NEW = "frag_tag_whats_new"
         private const val EXTRA_FILTER = "extra_filter"
+        private const val FLAG_FROM_HISTORY
+                = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_LAUNCHED_FROM_HISTORY
+
+        val Intent.isFromHistory: Boolean
+            get() = flags and (FLAG_FROM_HISTORY) == FLAG_FROM_HISTORY
     }
 }