Improve null safety for app pairs
- Improves crash safety in AppPairIcon.java. An app pair should never have more or fewer than 2 app members, but if it happens somehow and there is an app pair on the home screen, the device will enter a crash loop that is hard to recover from. Added some safety checks so that it doesn't happen.
Fixes: 317283244
Test: Manual and presubmit tested
Flag: ACONFIG com.android.wm.shell.enable_app_pairs TEAMFOOD
Change-Id: I2cbd90f028f7c31af6e832b5515502ba992f0b54
diff --git a/src/com/android/launcher3/apppairs/AppPairIconGraphic.kt b/src/com/android/launcher3/apppairs/AppPairIconGraphic.kt
index 2945979..fa840ed 100644
--- a/src/com/android/launcher3/apppairs/AppPairIconGraphic.kt
+++ b/src/com/android/launcher3/apppairs/AppPairIconGraphic.kt
@@ -21,9 +21,11 @@
import android.graphics.Rect
import android.graphics.drawable.Drawable
import android.util.AttributeSet
+import android.util.Log
import android.view.Gravity
import android.widget.FrameLayout
import com.android.launcher3.DeviceProfile
+import com.android.launcher3.model.data.WorkspaceItemInfo
/**
* A FrameLayout marking the area on an [AppPairIcon] where the visual icon will be drawn. One of
@@ -31,6 +33,8 @@
*/
class AppPairIconGraphic @JvmOverloads constructor(context: Context, attrs: AttributeSet? = null) :
FrameLayout(context, attrs) {
+ private val TAG = "AppPairIconGraphic"
+
companion object {
// Design specs -- the below ratios are in relation to the size of a standard app icon.
private const val OUTER_PADDING_SCALE = 1 / 30f
@@ -61,8 +65,8 @@
private lateinit var parentIcon: AppPairIcon
private lateinit var appPairBackground: Drawable
- private lateinit var appIcon1: Drawable
- private lateinit var appIcon2: Drawable
+ private var appIcon1: Drawable? = null
+ private var appIcon2: Drawable? = null
fun init(grid: DeviceProfile, icon: AppPairIcon) {
// Calculate device-specific measurements
@@ -79,12 +83,24 @@
appPairBackground = AppPairIconBackground(context, this)
appPairBackground.setBounds(0, 0, backgroundSize.toInt(), backgroundSize.toInt())
+ applyIcons(parentIcon.info.contents)
+ }
+
+ /** Sets up app pair member icons for drawing. */
+ private fun applyIcons(contents: ArrayList<WorkspaceItemInfo>) {
+ // App pair should always contain 2 members; if not 2, return to avoid a crash loop
+ if (contents.size != 2) {
+ Log.w(TAG, "AppPair contents not 2, size: " + contents.size, Throwable())
+ return
+ }
+
appIcon1 = parentIcon.info.contents[0].newIcon(context)
appIcon2 = parentIcon.info.contents[1].newIcon(context)
- appIcon1.setBounds(0, 0, memberIconSize.toInt(), memberIconSize.toInt())
- appIcon2.setBounds(0, 0, memberIconSize.toInt(), memberIconSize.toInt())
+ appIcon1?.setBounds(0, 0, memberIconSize.toInt(), memberIconSize.toInt())
+ appIcon2?.setBounds(0, 0, memberIconSize.toInt(), memberIconSize.toInt())
}
+
/** Gets this icon graphic's bounds, with respect to the parent icon's coordinate system. */
fun getIconBounds(outBounds: Rect) {
outBounds.set(0, 0, backgroundSize.toInt(), backgroundSize.toInt())
@@ -118,7 +134,7 @@
} else {
canvas.translate(width / 2f - memberIconSize / 2f, innerPadding)
}
- appIcon1.draw(canvas)
+ appIcon1?.draw(canvas)
canvas.restore()
// Draw second icon
@@ -135,7 +151,7 @@
height - (innerPadding + memberIconSize)
)
}
- appIcon2.draw(canvas)
+ appIcon2?.draw(canvas)
canvas.restore()
}
}