Gantt chart

app/src/androidTest/kotlin/info/appdev/chartexample/StartTest.kt

@@ -75,7 +75,10 @@ class StartTest {
 
     @After
     fun cleanUp() {
-        Intents.release()
+        // release() may have already been called by the last loop iteration
+        try {
+            Intents.release()
+        } catch (_: IllegalStateException) { /* not initialised, nothing to do */ }
         // Clean up test timber tree
         Timber.uprootAll()
     }
@@ -249,12 +252,17 @@ class StartTest {
                     if (!compose)
                         doClickTest(index, contentClass, contentItem)
 
-                    //Thread.sleep(100)
                     Espresso.pressBack()
 
                     // Wait for MainActivity to be visible again
                     composeTestRule.waitForIdle()
                     Thread.sleep(200) // Small delay for back navigation
+
+                    // Reset intent recording for next iteration; otherwise intents accumulate
+                    // across the loop and Intents.intended() can no longer find a fresh
+                    // unverified match for the current activity.
+                    Intents.release()
+                    Intents.init()
                 } catch (e: Exception) {
                     Timber.e("#$index/'${contentClass.simpleName}'->'$optionMenu' ${e.message}", e)
                     onView(ViewMatchers.isRoot())
@@ -264,6 +272,16 @@ class StartTest {
                                     .replace(" ", "")
                             )
                         })
+                    // Navigate back so subsequent iterations start from MainActivity
+                    try {
+                        Espresso.pressBack()
+                        composeTestRule.waitForIdle()
+                    } catch (_: Exception) { /* already on MainActivity */ }
+                    // Reset intents so the next iteration starts clean
+                    try {
+                        Intents.release()
+                        Intents.init()
+                    } catch (_: Exception) { /* ignore if already released */ }
                 }
             }
         }
@@ -278,6 +296,7 @@ class StartTest {
             contentItem.clazz == HorizontalBarFullComposeActivity::class.java ||
             contentItem.clazz == MultiLineComposeActivity::class.java ||
             contentItem.clazz == GradientActivity::class.java ||
+//            contentItem.clazz == TimeIntervalChartActivity::class.java ||
             contentItem.clazz == TimeLineActivity::class.java
         ) {
             // These charts have less clickable area, so skip further clicks

app/src/main/AndroidManifest.xml

@@ -60,6 +60,7 @@
         <activity android:name="info.appdev.chartexample.HalfPieChartActivity" />
         <activity android:name="info.appdev.chartexample.SpecificPositionsLineChartActivity" />
         <activity android:name="info.appdev.chartexample.TimeLineActivity" />
+        <activity android:name="info.appdev.chartexample.TimeIntervalChartActivity" />
     </application>
 
 </manifest>

app/src/main/kotlin/info/appdev/chartexample/TimeIntervalChartActivity.kt

@@ -0,0 +1,46 @@
+package info.appdev.chartexample
+
+import android.graphics.Color
+import android.os.Bundle
+import info.appdev.chartexample.databinding.ActivityTimeIntervalChartBinding
+import info.appdev.chartexample.notimportant.DemoBase
+import info.appdev.charting.data.EntryFloat
+import info.appdev.charting.data.GanttChartData
+import info.appdev.charting.data.GanttTask
+import info.appdev.charting.highlight.Highlight
+import info.appdev.charting.listener.OnChartValueSelectedListener
+
+/**
+ * Demo activity showing Gantt-style timeline visualization.
+ * Each horizontal bar represents a task with start time and duration.
+ */
+class TimeIntervalChartActivity : DemoBase(), OnChartValueSelectedListener {
+
+    private lateinit var binding: ActivityTimeIntervalChartBinding
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        binding = ActivityTimeIntervalChartBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+
+        // Create Gantt chart data
+        val ganttData = GanttChartData()
+
+        // Add sample project tasks
+        ganttData.addTask(GanttTask("Design", 0f, 50f, Color.rgb(255, 107, 107))) // Red: 0-50
+        ganttData.addTask(GanttTask("Dev", 40f, 100f, Color.rgb(66, 165, 245))) // Blue: 40-140
+        ganttData.addTask(GanttTask("Testing", 120f, 40f, Color.rgb(76, 175, 80), hatched = true)) // Green: 120-160
+        ganttData.addTask(GanttTask("Launch", 150f, 20f, Color.rgb(255, 193, 7))) // Yellow: 150-170
+        ganttData.minTime = 10f
+        ganttData.maxTime = 200f
+        // Set data and render
+        binding.chart1.setData(ganttData)
+    }
+
+    override fun saveToGallery() = Unit
+
+    override fun onValueSelected(entryFloat: EntryFloat, highlight: Highlight) = Unit
+
+    override fun onNothingSelected() = Unit
+
+}

app/src/main/kotlin/info/appdev/chartexample/notimportant/MainActivity.kt

@@ -75,6 +75,7 @@ import info.appdev.chartexample.ScrollViewActivity
 import info.appdev.chartexample.SpecificPositionsLineChartActivity
 import info.appdev.chartexample.StackedBarActivity
 import info.appdev.chartexample.StackedBarActivityNegative
+import info.appdev.chartexample.TimeIntervalChartActivity
 import info.appdev.chartexample.TimeLineActivity
 import info.appdev.chartexample.compose.HorizontalBarComposeActivity
 import info.appdev.chartexample.compose.HorizontalBarFullComposeActivity
@@ -219,6 +220,7 @@ class MainActivity : ComponentActivity() {
             add(ContentItem("Demonstrate and fix issues"))
             add(ContentItem("Gradient", "Show a gradient edge case", GradientActivity::class.java))
             add(ContentItem("Timeline", "Show a time line with Unix timestamp", TimeLineActivity::class.java))
+            add(ContentItem("Timeinterval", "Grantt chart", TimeIntervalChartActivity::class.java))
         }
     }
 }

app/src/main/res/layout/activity_time_interval_chart.xml

@@ -0,0 +1,60 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <info.appdev.charting.charts.GanttChart
+        android:id="@+id/chart1"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:layout_above="@+id/seekBarX"/>
+
+    <SeekBar
+        android:id="@+id/seekBarY"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_alignParentBottom="true"
+        android:layout_alignParentLeft="true"
+        android:layout_margin="8dp"
+        android:layout_toLeftOf="@+id/tvYMax"
+        android:layout_marginRight="5dp"
+        android:max="100"
+        android:paddingBottom="12dp" />
+
+    <SeekBar
+        android:id="@+id/seekBarX"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_above="@+id/seekBarY"
+        android:layout_margin="8dp"
+        android:layout_marginBottom="35dp"
+        android:layout_toLeftOf="@+id/tvXMax"
+        android:layout_marginRight="5dp"
+        android:max="100"
+        android:paddingBottom="12dp" />
+
+    <TextView
+        android:id="@+id/tvXMax"
+        android:layout_width="50dp"
+        android:layout_height="wrap_content"
+        android:layout_alignBottom="@+id/seekBarX"
+        android:layout_alignParentRight="true"
+        android:text="@string/dash"
+        android:layout_marginBottom="15dp"
+        android:layout_marginRight="10dp"
+        android:gravity="right"
+        android:textAppearance="?android:attr/textAppearanceMedium" />
+
+    <TextView
+        android:id="@+id/tvYMax"
+        android:layout_width="50dp"
+        android:layout_height="wrap_content"
+        android:layout_alignBottom="@+id/seekBarY"
+        android:layout_alignParentRight="true"
+        android:text="@string/dash"
+        android:layout_marginBottom="15dp"
+        android:layout_marginRight="10dp"
+        android:gravity="right"
+        android:textAppearance="?android:attr/textAppearanceMedium" />
+
+</RelativeLayout>