#feature: After the photo is taken, notify the system to update the m…

…edia library. 拍照后通知系统扫描更新媒体库，解决目前拍照后在相册里找不到的问题。 (zhihu#511)

* #feature: After the photo is taken, notify the system to update the media library

* checkStyle: #feature: After the photo is taken, notify the system to update the media library

* Delete meaningless code

Delete meaningless code

matisse/src/main/java/com/zhihu/matisse/internal/utils/SingleMediaScanner.java

@@ -0,0 +1,44 @@
+package com.zhihu.matisse.internal.utils;
+
+import android.content.Context;
+import android.media.MediaScannerConnection;
+import android.net.Uri;
+
+/**
+ * @author 工藤
+ * @email gougou@16fan.com
+ * create at 2018年10月23日12:17:59
+ * description:媒体扫描
+ */
+public class SingleMediaScanner implements MediaScannerConnection.MediaScannerConnectionClient {
+
+    private MediaScannerConnection mMsc;
+    private String mPath;
+    private ScanListener mListener;
+
+    public interface ScanListener {
+
+        /**
+         * scan finish
+         */
+        void onScanFinish();
+    }
+
+    public SingleMediaScanner(Context context, String mPath, ScanListener mListener) {
+        this.mPath = mPath;
+        this.mListener = mListener;
+        this.mMsc = new MediaScannerConnection(context, this);
+        this.mMsc.connect();
+    }
+
+    @Override public void onMediaScannerConnected() {
+        mMsc.scanFile(mPath, null);
+    }
+
+    @Override public void onScanCompleted(String mPath, Uri mUri) {
+        mMsc.disconnect();
+        if (mListener != null) {
+            mListener.onScanFinish();
+        }
+    }
+}

matisse/src/main/java/com/zhihu/matisse/ui/MatisseActivity.java

@@ -56,6 +56,7 @@
 import com.zhihu.matisse.internal.utils.PathUtils;
 import com.zhihu.matisse.internal.utils.PhotoMetadataUtils;
 
+import com.zhihu.matisse.internal.utils.SingleMediaScanner;
 import java.util.ArrayList;
 
 /**
@@ -234,6 +235,12 @@ protected void onActivityResult(int requestCode, int resultCode, Intent data) {
             if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP)
                 MatisseActivity.this.revokeUriPermission(contentUri,
                         Intent.FLAG_GRANT_WRITE_URI_PERMISSION | Intent.FLAG_GRANT_READ_URI_PERMISSION);
+
+            new SingleMediaScanner(this.getApplicationContext(), path, new SingleMediaScanner.ScanListener() {
+                @Override public void onScanFinish() {
+                    Log.i("SingleMediaScanner", "scan finish!");
+                }
+            });
             finish();
         }
     }