diff --git a/app/build.gradle b/app/build.gradle
index dd55497..8f6c0be 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -1,11 +1,11 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 29
+    compileSdkVersion 30
     defaultConfig {
         applicationId "com.donkingliang.imageselectdemo"
         minSdkVersion 14
-        targetSdkVersion 29
+        targetSdkVersion 30
         versionCode 1
         versionName "1.0"
     }
@@ -21,7 +21,7 @@ dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
     testImplementation 'junit:junit:4.12'
     implementation 'androidx.appcompat:appcompat:1.1.0'
-    implementation 'androidx.recyclerview:recyclerview:1.0.0'
+    implementation 'androidx.recyclerview:recyclerview:1.1.0'
     implementation 'com.github.bumptech.glide:glide:4.9.0'
     annotationProcessor 'com.github.bumptech.glide:compiler:4.9.0'
     implementation project(':imageselector')
diff --git a/build.gradle b/build.gradle
index 3ba51d7..f582dac 100644
--- a/build.gradle
+++ b/build.gradle
@@ -18,7 +18,7 @@ allprojects {
     repositories {
         jcenter()
         maven { url "https://jitpack.io" }
-        maven { url 'https://maven.google.com' }
+//        maven { url 'https://maven.google.com' }
         google()
     }
 }
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 1be472a..6c5af95 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
 #Mon Dec 28 10:00:20 PST 2015
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.6-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.4-all.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/imageselector/build.gradle b/imageselector/build.gradle
index 07c287d..f99ff0b 100644
--- a/imageselector/build.gradle
+++ b/imageselector/build.gradle
@@ -3,10 +3,10 @@ apply plugin: 'com.android.library'
 group='com.github.donkingliang' // 指定group，com.github.<用户名>
 
 android {
-    compileSdkVersion 29
+    compileSdkVersion 30
     defaultConfig {
         minSdkVersion 14
-        targetSdkVersion 29
+        targetSdkVersion 30
         versionCode 1
         versionName "1.0"
     }
diff --git a/imageselector/src/main/java/com/donkingliang/imageselector/model/ImageModel.java b/imageselector/src/main/java/com/donkingliang/imageselector/model/ImageModel.java
index ba467ee..5f07e2b 100644
--- a/imageselector/src/main/java/com/donkingliang/imageselector/model/ImageModel.java
+++ b/imageselector/src/main/java/com/donkingliang/imageselector/model/ImageModel.java
@@ -43,7 +43,7 @@ public static void preloadAndRegisterContentObserver(final Context context) {
         if (observer == null) {
             observer = new PhotoContentObserver(context.getApplicationContext());
             context.getApplicationContext().getContentResolver().registerContentObserver(
-                    MediaStore.Images.Media.EXTERNAL_CONTENT_URI, false, observer);
+                    MediaStore.Images.Media.EXTERNAL_CONTENT_URI, true, observer);
         }
         preload(context);
     }
diff --git a/imageselector/src/main/java/com/donkingliang/imageselector/utils/ImageUtil.java b/imageselector/src/main/java/com/donkingliang/imageselector/utils/ImageUtil.java
index d67115c..1c6b0ac 100644
--- a/imageselector/src/main/java/com/donkingliang/imageselector/utils/ImageUtil.java
+++ b/imageselector/src/main/java/com/donkingliang/imageselector/utils/ImageUtil.java
@@ -319,6 +319,7 @@ public static void savePicture(final Context context, final Uri uri, final long
             @Override
             public void run() {
                 if (isNeedSavePicture(context, takeTime)) {
+                    Log.e("eee","-----");
                     context.sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, uri));
                 }
             }
@@ -333,7 +334,8 @@ public void run() {
      */
     private static boolean isNeedSavePicture(Context context, long takeTime) {
         //扫描图片
-        Uri mImageUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
+        Uri mImageUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI
+                .buildUpon().appendQueryParameter("limit","1").build();
         ContentResolver mContentResolver = context.getContentResolver();
         Cursor mCursor = mContentResolver.query(mImageUri, new String[]{
                         MediaStore.Images.Media.DATE_ADDED,
@@ -341,7 +343,7 @@ private static boolean isNeedSavePicture(Context context, long takeTime) {
                         MediaStore.Images.Media.SIZE},
                 MediaStore.MediaColumns.SIZE + ">0",
                 null,
-                MediaStore.Files.FileColumns._ID + " DESC limit 1 offset 0");
+                MediaStore.Files.FileColumns._ID + " DESC");
 
         //读取扫描到的图片
         if (mCursor != null && mCursor.getCount() > 0 && mCursor.moveToFirst()) {
@@ -352,6 +354,7 @@ private static boolean isNeedSavePicture(Context context, long takeTime) {
                 time *= 1000;
             }
             mCursor.close();
+
             // 如果照片的插入时间大于相机的拍照时间，就认为是拍照图片已插入
             return time + 1000 < takeTime;
         }