Add GradientColorWallpaper in SystemUi
GradientColorWallpaper is a very sample wallpaper that draws a full screen rectangle.
Test: GradientColorWallpaperTest
Flag: android.app.enable_connected_displays_wallpaper
Bug: 384519696
Change-Id: Ie098a47451a3e8a6c05ef9626337212214cbca91
diff --git a/packages/SystemUI/Android.bp b/packages/SystemUI/Android.bp
index c3c5e87..a935aac 100644
--- a/packages/SystemUI/Android.bp
+++ b/packages/SystemUI/Android.bp
@@ -423,6 +423,7 @@
],
manifest: "AndroidManifest-res.xml",
flags_packages: [
+ "android.app.flags-aconfig",
"com_android_systemui_flags",
],
}
diff --git a/packages/SystemUI/AndroidManifest.xml b/packages/SystemUI/AndroidManifest.xml
index 51ea529..0075f85 100644
--- a/packages/SystemUI/AndroidManifest.xml
+++ b/packages/SystemUI/AndroidManifest.xml
@@ -547,6 +547,12 @@
android:permission="android.permission.BIND_WALLPAPER"
android:exported="true" />
+ <service android:name=".wallpapers.GradientColorWallpaper"
+ android:featureFlag="android.app.enable_connected_displays_wallpaper"
+ android:singleUser="true"
+ android:permission="android.permission.BIND_WALLPAPER"
+ android:exported="true" />
+
<activity android:name=".tuner.TunerActivity"
android:enabled="false"
android:icon="@drawable/tuner"
diff --git a/packages/SystemUI/multivalentTests/src/com/android/systemui/wallpapers/GradientColorWallpaperTest.kt b/packages/SystemUI/multivalentTests/src/com/android/systemui/wallpapers/GradientColorWallpaperTest.kt
new file mode 100644
index 0000000..ba6ea9f
--- /dev/null
+++ b/packages/SystemUI/multivalentTests/src/com/android/systemui/wallpapers/GradientColorWallpaperTest.kt
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2025 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.android.systemui.wallpapers
+
+import android.content.Context
+import android.graphics.Canvas
+import android.graphics.Paint
+import android.graphics.Rect
+import android.graphics.RectF
+import android.service.wallpaper.WallpaperService.Engine
+import android.testing.TestableLooper.RunWithLooper
+import android.view.Surface
+import android.view.SurfaceHolder
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.filters.SmallTest
+import com.android.systemui.SysuiTestCase
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.mockito.ArgumentMatchers.anyInt
+import org.mockito.Mock
+import org.mockito.Mockito.spy
+import org.mockito.MockitoAnnotations
+import org.mockito.kotlin.any
+import org.mockito.kotlin.verify
+import org.mockito.kotlin.whenever
+
+@SmallTest
+@RunWith(AndroidJUnit4::class)
+@RunWithLooper
+class GradientColorWallpaperTest : SysuiTestCase() {
+
+ @Mock private lateinit var surfaceHolder: SurfaceHolder
+
+ @Mock private lateinit var surface: Surface
+
+ @Mock private lateinit var canvas: Canvas
+
+ @Mock private lateinit var mockContext: Context
+
+ @Before
+ fun setUp() {
+ MockitoAnnotations.initMocks(this)
+
+ whenever(surfaceHolder.surface).thenReturn(surface)
+ whenever(surfaceHolder.surfaceFrame).thenReturn(surfaceFrame)
+ whenever(surface.lockHardwareCanvas()).thenReturn(canvas)
+ whenever(mockContext.getColor(anyInt())).thenReturn(1)
+ }
+
+ private fun createGradientColorWallpaperEngine(): Engine {
+ val gradientColorWallpaper = GradientColorWallpaper()
+ val engine = spy(gradientColorWallpaper.onCreateEngine())
+ whenever(engine.displayContext).thenReturn(mockContext)
+ return engine
+ }
+
+ @Test
+ fun onSurfaceRedrawNeeded_shouldDrawInCanvas() {
+ val engine = createGradientColorWallpaperEngine()
+ engine.onCreate(surfaceHolder)
+
+ engine.onSurfaceRedrawNeeded(surfaceHolder)
+
+ verify(canvas).drawRect(any<RectF>(), any<Paint>())
+ }
+
+ private companion object {
+ val surfaceFrame = Rect(0, 0, 100, 100)
+ }
+}
diff --git a/packages/SystemUI/src/com/android/systemui/wallpapers/GradientColorWallpaper.kt b/packages/SystemUI/src/com/android/systemui/wallpapers/GradientColorWallpaper.kt
new file mode 100644
index 0000000..c1fb0e8
--- /dev/null
+++ b/packages/SystemUI/src/com/android/systemui/wallpapers/GradientColorWallpaper.kt
@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2025 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.android.systemui.wallpapers
+
+import android.graphics.Canvas
+import android.graphics.Paint
+import android.service.wallpaper.WallpaperService
+import android.util.Log
+import android.view.SurfaceHolder
+import androidx.core.graphics.toRectF
+
+/** A wallpaper that shows a static gradient color image wallpaper. */
+class GradientColorWallpaper : WallpaperService() {
+
+ override fun onCreateEngine(): Engine = GradientColorWallpaperEngine()
+
+ inner class GradientColorWallpaperEngine : Engine() {
+ init {
+ setShowForAllUsers(true)
+ }
+
+ override fun onSurfaceRedrawNeeded(surfaceHolder: SurfaceHolder) {
+ drawFrameInternal(surfaceHolder)
+ }
+
+ private fun drawFrameInternal(surfaceHolder: SurfaceHolder) {
+ val context = displayContext ?: return
+ val surface = surfaceHolder.surface
+ var canvas: Canvas? = null
+ try {
+ canvas = surface.lockHardwareCanvas()
+ val destRectF = surfaceHolder.surfaceFrame.toRectF()
+ val toColor = context.getColor(com.android.internal.R.color.materialColorPrimary)
+
+ // TODO(b/384519696): Draw the actual gradient color wallpaper instead.
+ canvas.drawRect(destRectF, Paint().apply { color = toColor })
+ } catch (exception: IllegalStateException) {
+ Log.d(TAG, "Fail to draw in the canvas", exception)
+ } finally {
+ canvas?.let { surface.unlockCanvasAndPost(it) }
+ }
+ }
+ }
+
+ private companion object {
+ const val TAG = "GradientColorWallpaper"
+ }
+}