App: Introduce the App class to provide global application states

Several properties in the Application class are dynamically bound after the application launches, which means accessing those properties before bound incurs NPE. To avoid such unintended NPE, this patch introduces the App singleton class holding those properties like applicationContext. Signed-off-by: Wook Song <[email protected]>
nnstreamer · Jun 3, 2024 · f4a86eb · f4a86eb
1 parent 532bb30
commit f4a86eb
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diff --git a/ml_inference_offloading/src/main/AndroidManifest.xml b/ml_inference_offloading/src/main/AndroidManifest.xml
@@ -8,7 +8,7 @@
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
 
-    <application
+    <application android:name=".App"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
         android:roundIcon="@mipmap/ic_launcher_round"

diff --git a/ml_inference_offloading/src/main/java/ai/nnstreamer/ml/inference/offloading/App.kt b/ml_inference_offloading/src/main/java/ai/nnstreamer/ml/inference/offloading/App.kt
@@ -0,0 +1,18 @@
+package ai.nnstreamer.ml.inference.offloading
+
+import android.app.Application
+import android.content.Context
+
+class App : Application() {
+    init{
+        instance = this
+    }
+
+    companion object {
+        lateinit var instance: App
+
+        fun context() : Context {
+            return instance.applicationContext
+        }
+    }
+}