feat: 增加可以根据图片的mimeType过滤加载，避免不需要的图片类型也加载出来了。

app/src/main/java/com/lzy/imagepickerdemo/ImagePickerActivity.java

@@ -21,6 +21,7 @@
 
 import com.isseiaoki.simplecropview.FreeCropImageView;
 import com.lzy.imagepicker.ImagePicker;
+import com.lzy.imagepicker.ImageTypeFilter;
 import com.lzy.imagepicker.bean.ImageItem;
 import com.lzy.imagepicker.ui.ImageGridActivity;
 import com.lzy.imagepicker.util.InnerToaster;
@@ -86,6 +87,15 @@ public void show(int resId) {
                 Toast.makeText(ImagePickerActivity.this, resId, Toast.LENGTH_SHORT).show();
             }
         });
+        //添加类型过滤器
+        imagePicker.setFilter(new ImageTypeFilter() {
+            @Override
+            public boolean filter(String mimeType) {
+                return "image/png".equalsIgnoreCase(mimeType)
+                        || "image/jpeg".equalsIgnoreCase(mimeType)
+                        || "image/jpg".equalsIgnoreCase(mimeType);
+            }
+        });
         rb_uil = (RadioButton) findViewById(R.id.rb_uil);
         rb_glide = (RadioButton) findViewById(R.id.rb_glide);
         rb_picasso = (RadioButton) findViewById(R.id.rb_picasso);
@@ -102,7 +112,7 @@ public void show(int resId) {
         rb_muti_select.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
             @Override
             public void onCheckedChanged(CompoundButton aCompoundButton, boolean aB) {
-                if (images != null&&aB) {
+                if (images != null && aB) {
                     images.clear();
                 }
             }
@@ -141,7 +151,7 @@ public void onCheckedChanged(CompoundButton aCompoundButton, boolean aB) {
         btn_open_gallery.setOnClickListener(this);
         Button btn_wxDemo = (Button) findViewById(R.id.btn_wxDemo);
         btn_wxDemo.setOnClickListener(this);
-        imagePicker.setCropCacheFolder(new File(getExternalCacheDir(),"test/crop"));
+        imagePicker.setCropCacheFolder(new File(getExternalCacheDir(), "test/crop"));
         gridView = (GridView) findViewById(R.id.gridview);
     }
 
@@ -180,7 +190,7 @@ else if (rb_xutils3.isChecked())
                 imagePicker.setOutPutX(Integer.valueOf(et_outputx.getText().toString()));
                 imagePicker.setOutPutY(Integer.valueOf(et_outputy.getText().toString()));
 
-                if (!imagePicker.isMultiMode()&&images!=null) {
+                if (!imagePicker.isMultiMode() && images != null) {
                     images.clear();
                 }
                 Intent intent = new Intent(this, ImageGridActivity.class);

imagepicker/src/main/java/com/lzy/imagepicker/ImageDataSource.java

@@ -34,13 +34,14 @@ public class ImageDataSource implements LoaderManager.LoaderCallbacks<Cursor> {
     private OnImagesLoadedListener loadedListener;
     private ArrayList<ImageFolder> imageFolders = new ArrayList<>();
     private int mLoadedCount = 0;
+    private ImageTypeFilter mFilter;
 
 
     public ImageDataSource(FragmentActivity activity, String path, OnImagesLoadedListener loadedListener) {
         this.activity = activity;
         this.loadedListener = loadedListener;
-        mLoadedCount=0;
-
+        mLoadedCount = 0;
+        mFilter = ImagePicker.getInstance().getFilter();
         LoaderManager loaderManager = activity.getSupportLoaderManager();
         if (path == null) {
             loaderManager.initLoader(LOADER_ALL, null, this);
@@ -87,6 +88,9 @@ public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
             int imageHeight = data.getInt(data.getColumnIndexOrThrow(IMAGE_PROJECTION[4]));
             String imageMimeType = data.getString(data.getColumnIndexOrThrow(IMAGE_PROJECTION[5]));
             long imageAddTime = data.getLong(data.getColumnIndexOrThrow(IMAGE_PROJECTION[6]));
+            if (mFilter != null && !mFilter.filter(imageMimeType)) {
+                continue;
+            }
             ImageItem imageItem = new ImageItem();
             imageItem.name = imageName;
             imageItem.path = imagePath;

imagepicker/src/main/java/com/lzy/imagepicker/ImagePicker.java

@@ -65,7 +65,7 @@ public class ImagePicker {
     private List<ImageFolder> mImageFolders;
     private int mCurrentImageFolderPosition = 0;
     private List<OnImageSelectedListener> mImageSelectedListeners;
-
+    private ImageTypeFilter mFilter;
     private static ImagePicker mInstance;
 
 
@@ -226,6 +226,13 @@ public void clearSelectedImages() {
         if (mSelectedImages != null) mSelectedImages.clear();
     }
 
+    public ImageTypeFilter getFilter(){
+        return mFilter;
+    }
+
+    public void setFilter(ImageTypeFilter filter) {
+        this.mFilter = filter;
+    }
     public void clear() {
         if (mImageSelectedListeners != null) {
             mImageSelectedListeners.clear();

imagepicker/src/main/java/com/lzy/imagepicker/ImageTypeFilter.java

@@ -0,0 +1,20 @@
+package com.lzy.imagepicker;
+
+/**
+ * Project Name: ImagePicker
+ *
+ * @author vj
+ * @date : 2020-06-08 18:09
+ * email:[email protected]
+ * desc:
+ * lastModify:
+ */
+public interface ImageTypeFilter {
+    /**
+     * filter
+     *
+     * @param mimeType image/png,image/jpeg,image/*,image/jpeg,image/webp,image/gif so...
+     * @return true:不过滤，会显示出来，false：过滤，不会加载出来
+     */
+    boolean filter(String mimeType);
+}