diff --git a/.idea/gradle.xml b/.idea/gradle.xml
index 91e1deb..57e10d2 100644
--- a/.idea/gradle.xml
+++ b/.idea/gradle.xml
@@ -12,6 +12,7 @@
             <option value="$PROJECT_DIR$" />
             <option value="$PROJECT_DIR$/app" />
             <option value="$PROJECT_DIR$/hapimediapicker" />
+            <option value="$PROJECT_DIR$/lib_sreenshot" />
           </set>
         </option>
         <option name="resolveModulePerSourceSet" value="false" />
diff --git a/lib_sreenshot/build.gradle b/lib_sreenshot/build.gradle
index 7db54a1..1d37387 100644
--- a/lib_sreenshot/build.gradle
+++ b/lib_sreenshot/build.gradle
@@ -30,7 +30,7 @@ android {
 dependencies {
 
     implementation 'androidx.appcompat:appcompat:1.3.1'
-
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
     testImplementation 'junit:junit:4.+'
     androidTestImplementation 'androidx.test.ext:junit:1.1.3'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
diff --git a/lib_sreenshot/src/main/java/com/blabla/sreenshot/ScreenShotPlugin.java b/lib_sreenshot/src/main/java/com/blabla/sreenshot/ScreenShotPlugin.java
index 6d1a364..f74dac7 100644
--- a/lib_sreenshot/src/main/java/com/blabla/sreenshot/ScreenShotPlugin.java
+++ b/lib_sreenshot/src/main/java/com/blabla/sreenshot/ScreenShotPlugin.java
@@ -49,7 +49,8 @@ private ScreenShotPlugin() {
 
 
     private ServiceConnection serviceConnection;
-    public void startMediaRecorder(final FragmentActivity activity, OnScreenShotListener callback) {
+    @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
+    public void startMediaRecorder(final FragmentActivity activity, final OnScreenShotListener callback) {
         MediaProjectionManager mediaProjectionManager = (MediaProjectionManager) activity.getSystemService(Context.MEDIA_PROJECTION_SERVICE);
         // 此处宽高需要获取屏幕完整宽高，否则截屏图片会有白/黑边
         final DisplayMetrics displayMetrics = new DisplayMetrics();