1.修改RA Image Android照片列表异步加载图片。

RA Image/app/src/main/java/com/usai/redant/raimage/PhotoList/PhotoGridActivity.java

@@ -4,6 +4,7 @@ package com.usai.redant.raimage.PhotoList;
 import android.content.Intent;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
+import android.media.ThumbnailUtils;
 import android.support.v7.app.ActionBar;
 import android.support.v7.app.AppCompatActivity;
 import android.os.Bundle;
@@ -213,10 +214,31 @@ public class PhotoGridActivity extends AppCompatActivity {
             String path = item.get("path");
 
 
-            Bitmap bitmap = scaleImage(path);
+//            Bitmap bitmap = scaleImage(path);
+
 //            Bitmap bitmap = BitmapFactory.decodeFile(path);
+//
+//            Bitmap scale = ThumbnailUtils.extractThumbnail(bitmap, 300, 300);
+//
+//            holder.photoView.setImageBitmap(scale);
+
+            final String filePath = path;
+            final PhotoViewHolder photoHolder = holder;
+            new Thread(new Runnable() {
+                @Override
+                public void run() {
+                    Bitmap bitmap = BitmapFactory.decodeFile(filePath);
 
-            holder.photoView.setImageBitmap(bitmap);
+                    final Bitmap scale = ThumbnailUtils.extractThumbnail(bitmap, 300, 300);
+
+                    runOnUiThread(new Runnable() {
+                        @Override
+                        public void run() {
+                            photoHolder.photoView.setImageBitmap(scale);
+                        }
+                    });
+                }
+            }).start();
 
             holder.checkBtn.setBackgroundDrawable(getResources().getDrawable(R.drawable.check_none));