Implement Proper "View Images in Gallery" Button Functionality

app/src/main/java/swati4star/createpdf/fragment/PdfToImageFragment.java

@@ -48,6 +48,7 @@
 import swati4star.createpdf.util.PermissionsUtils;
 import swati4star.createpdf.util.RealPathUtil;
 import swati4star.createpdf.util.StringUtils;
+import swati4star.createpdf.util.ImageUtils;
 
 import static android.app.Activity.RESULT_OK;
 import static swati4star.createpdf.util.Constants.BUNDLE_DATA;
@@ -72,6 +73,7 @@ public class PdfToImageFragment extends Fragment implements BottomSheetPopulate,
     private Context mContext;
     private PDFUtils mPDFUtils;
     private String[] mInputPassword;
+    private ImageUtils mImageUtils;
 
     @BindView(R.id.lottie_progress)
     LottieAnimationView mLottieProgress;
@@ -109,24 +111,30 @@ public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container,
         ButterKnife.bind(this, rootView);
         mOperation = getArguments().getString(BUNDLE_DATA);
         mSheetBehavior = BottomSheetBehavior.from(mLayoutBottomSheet);
-        mSheetBehavior.setBottomSheetCallback(new BottomSheetCallback(mUpArrow, isAdded()));
+        mSheetBehavior.addBottomSheetCallback(new BottomSheetCallback(mUpArrow, isAdded()));
         mLottieProgress.setVisibility(View.VISIBLE);
         mBottomSheetUtils.populateBottomSheetWithPDFs(this);
         resetView();
         getRuntimePermissions();
         return rootView;
     }
 
+
     @OnClick(R.id.viewImagesInGallery)
     void onImagesInGalleryClick() {
         Intent intent = new Intent();
         intent.setAction(Intent.ACTION_VIEW);
-        Uri imagesUri = Uri.parse("content:///storage/emulated/0/PDFfiles/");
-        intent.setDataAndType(imagesUri, "image/*");
-        intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
-        startActivity(intent);
+        for (int i = 0; i < mOutputFilePaths.size(); i++) {
+            Uri imagesUri = Uri.fromFile(new File(mOutputFilePaths.get(i)));
+            Uri imagesRealUri = mFileUtils.getContent(imagesUri);
+            mImageUtils.saveImgToGallery(mOutputFilePaths.get(i), mContext);
+            intent.setDataAndType(imagesRealUri, "image/*");
+            intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
+            startActivity(intent);
+        }
     }
 
+
     /**
      * called when user chooses to share generated images
      */
@@ -229,6 +237,7 @@ public void onAttach(Context context) {
         mActivity = (Activity) context;
         mMorphButtonUtility = new MorphButtonUtility(mActivity);
         mFileUtils = new FileUtils(mActivity);
+        mImageUtils = ImageUtils.getInstance();
         mBottomSheetUtils = new BottomSheetUtils(mActivity);
         mContext = context;
         mPDFUtils = new PDFUtils(mActivity);
@@ -336,7 +345,7 @@ public boolean checkSheetBehaviour() {
      ***/
     private void getRuntimePermissions() {
         PermissionsUtils.getInstance().requestRuntimePermissions(this,
-                    WRITE_PERMISSIONS,
-                    REQUEST_CODE_FOR_WRITE_PERMISSION);
+                WRITE_PERMISSIONS,
+                REQUEST_CODE_FOR_WRITE_PERMISSION);
     }
 }

app/src/main/java/swati4star/createpdf/util/FileUtils.java

@@ -1,7 +1,9 @@
 package swati4star.createpdf.util;
 
+import android.annotation.SuppressLint;
 import android.app.Activity;
 import android.content.ActivityNotFoundException;
+import android.content.ContentResolver;
 import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
@@ -12,6 +14,7 @@
 import android.print.PrintDocumentAdapter;
 import android.print.PrintManager;
 import android.provider.MediaStore;
+
 import androidx.core.content.FileProvider;
 
 import com.afollestad.materialdialogs.MaterialDialog;
@@ -232,7 +235,6 @@ public static String getFileName(String path) {
         return index < path.length() ? path.substring(index + 1) : null;
     }
 
-
     /**
      * Extracts file name from the URI
      *
@@ -363,9 +365,10 @@ String getUniqueFileName(String fileName) {
      * Opens a Dialog to select a filename.
      * If the file under that name already exists, an overwrite dialog gets opened.
      * If the overwrite is cancelled, this first dialog gets opened again.
+     *
      * @param preFillName a prefill Name for the file
-     * @param ext the file extension
-     * @param saveMethod the method that should be called when a filename is chosen
+     * @param ext         the file extension
+     * @param saveMethod  the method that should be called when a filename is chosen
      */
     public void openSaveDialog(String preFillName, String ext, Consumer<String> saveMethod) {
 
@@ -387,4 +390,34 @@ public void openSaveDialog(String preFillName, String ext, Consumer<String> save
             }
         }).show();
     }
+
+    /***
+     * Converts URI to actual decoded URI storing new image content
+     *
+     * @param uri: source URI starts with "file://"
+     * @return generated URI starts with "content://"
+     */
+    public Uri getContent(Uri uri) {
+        if (!uri.getScheme().equals("file")) {
+            return uri;
+        }
+        if (uri.getEncodedPath() == null) {
+            return uri;
+        }
+        ContentResolver resolver = this.mContext.getContentResolver();
+        String buffer = "(" + MediaStore.Images.ImageColumns.DATA + "='" + Uri.decode(uri.getEncodedPath()) + "')";
+        @SuppressLint("Recycle") Cursor cursor = resolver.query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, new String[]{MediaStore.Images.ImageColumns._ID}, buffer, null, null);
+        int index = 0;
+        for (cursor.moveToFirst(); !cursor.isAfterLast(); cursor.moveToNext()) {
+            index = cursor.getInt(cursor.getColumnIndex(MediaStore.Images.ImageColumns._ID));
+        }
+        if (index == 0) {
+            return uri;
+        }
+        Uri newUri = Uri.parse("content://media/external/images/media/" + index);
+        if (newUri != null) {
+            uri = newUri;
+        }
+        return uri;
+    }
 }

app/src/main/java/swati4star/createpdf/util/ImageUtils.java

@@ -1,7 +1,10 @@
 package swati4star.createpdf.util;
 
 import android.app.Activity;
+import android.content.ContentResolver;
+import android.content.ContentValues;
 import android.content.Context;
+import android.content.Intent;
 import android.content.SharedPreferences;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
@@ -13,9 +16,12 @@
 import android.graphics.PorterDuff;
 import android.graphics.PorterDuffXfermode;
 import android.graphics.Rect;
+import android.net.Uri;
 import android.os.Environment;
 import android.preference.PreferenceManager;
 import androidx.fragment.app.Fragment;
+
+import android.provider.MediaStore;
 import android.util.Log;
 import android.view.View;
 import android.widget.CheckBox;
@@ -278,5 +284,32 @@ private static boolean checkIfBitmapIsWhite(Bitmap bitmap) {
         return bitmap.sameAs(whiteBitmap);
     }
 
+    public ContentValues getImageContentValues(File paramFile, long paramLong) {
+        ContentValues localContentValues = new ContentValues();
+        localContentValues.put("title", paramFile.getName());
+        localContentValues.put("_display_name", paramFile.getName());
+        localContentValues.put("mime_type", "image/jpeg");
+        localContentValues.put("datetaken", paramLong);
+        localContentValues.put("date_modified", paramLong);
+        localContentValues.put("date_added", paramLong);
+        localContentValues.put("orientation", 0);
+        localContentValues.put("_data", paramFile.getAbsolutePath());
+        localContentValues.put("_size", paramFile.length());
+        return localContentValues;
+    }
+
+    public void saveImgToGallery(String imageFile, Context context) {
+        try {
+            ContentResolver resolver = context.getContentResolver();
+            ContentValues contentValues = getImageContentValues(new File(imageFile), System.currentTimeMillis());
+            resolver.insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, contentValues);
+            Intent intent = new Intent("android.intent.action.MEDIA_SCANNER_SCAN_FILE");
+            intent.setData(Uri.fromFile(new File(imageFile)));
+            context.sendBroadcast(intent);
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+
 
-}
+}