diff --git a/android/build.gradle b/android/build.gradle
index 70660b2..d374b27 100644
--- a/android/build.gradle
+++ b/android/build.gradle
@@ -1,3 +1,7 @@
+def safeExtGet(prop, fallback) {
+    rootProject.ext.has(prop) ? rootProject.ext.get(prop) : fallback
+}
+
 buildscript {
     repositories {
         google()
@@ -12,12 +16,14 @@ buildscript {
 apply plugin: 'com.android.library'
 
 android {
-    compileSdkVersion 28
-    buildToolsVersion "28.0.3"
+    compileSdkVersion safeExtGet('compileSdkVersion', 23)
+    //noinspection GradleDependency
+    buildToolsVersion safeExtGet('buildToolsVersion', '23.0.1')
 
     defaultConfig {
-        minSdkVersion 16
-        targetSdkVersion 26
+        minSdkVersion safeExtGet('minSdkVersion', 16)
+        //noinspection OldTargetApi
+        targetSdkVersion safeExtGet('targetSdkVersion', 23)
         versionCode 1
         versionName "1.0"
     }
diff --git a/app-installed-checker.js b/app-installed-checker.js
index e08be30..4515545 100644
--- a/app-installed-checker.js
+++ b/app-installed-checker.js
@@ -21,11 +21,9 @@ class AppInstalledChecker {
             Linking
                 .canOpenURL(proto + '://' + query || '')
                 .then((isInstalled) => {
-                    console.log('isInstalled', isInstalled);
                     resolve(isInstalled);
                 })
                 .catch((err) => {
-                    console.log('erroer', err);
                     reject(err);
                 });
         });
@@ -39,7 +37,7 @@ class AppInstalledChecker {
     }
 
     static isAppInstalledAndroid(key) {
-        return this.checkPackageName(APP_LIST[key] != null ? APP_LIST[key].pkgName : key);
+        return this.checkPackageName(key);
     }
 
     static isAppInstalledIOS(key) {