Increase sdk and fix crash at the end

app/build.gradle

@@ -3,16 +3,16 @@ plugins {
 }
 
 android {
-    compileSdkVersion 32
+    compileSdkVersion 33
     buildToolsVersion "30.0.3"
     namespace "net.crystalyx.setaswallpaper"
 
     defaultConfig {
         applicationId "net.crystalyx.setaswallpaper"
         minSdkVersion 5
-        targetSdkVersion 32
-        versionCode 7
-        versionName "3.0"
+        targetSdkVersion 33
+        versionCode 8
+        versionName "3.1"
     }
 
     signingConfigs {

app/src/main/java/net/crystalyx/setaswallpaper/SetWallpaperActivity.java

@@ -78,6 +78,8 @@ public class SetWallpaperActivity extends Activity {
         }
 
         Toast.makeText(this, "Wallpaper set!", Toast.LENGTH_SHORT).show();
+
+        finish();
     }
 
 }