few playstore reported crash fixes (#475)

Author: Swati4star

app/build.gradle

@@ -10,8 +10,8 @@ android {
         minSdkVersion 21
         multiDexEnabled true
         targetSdkVersion 27
-        versionCode 53
-        versionName "8.0.0"
+        versionCode 58
+        versionName "8.3.1"
     }
     buildTypes {
         release {

app/src/main/java/swati4star/createpdf/adapter/ViewFilesAdapter.java

@@ -189,7 +189,8 @@ public void unCheckAll() {
     public ArrayList<String> getSelectedFilePath() {
         ArrayList<String> filePathList = new ArrayList<>();
         for (int position : mSelectedFiles) {
-            filePathList.add(mFileList.get(position).getPath());
+            if (mFileList.size() > position)
+                filePathList.add(mFileList.get(position).getPath());
         }
         return filePathList;
     }
@@ -286,7 +287,8 @@ public void deleteFiles() {
     public void shareFiles() {
         ArrayList<File> files = new ArrayList<>();
         for (int position : mSelectedFiles) {
-            files.add(mFileList.get(position));
+            if (mFileList.size() > position)
+                files.add(mFileList.get(position));
         }
         mFileUtils.shareMultipleFiles(files);
     }

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

@@ -252,7 +252,7 @@ public void pdfCompressionStarted() {
     @Override
     public void pdfCompressionEnded(String path, Boolean success) {
         mMaterialDialog.dismiss();
-        if (success) {
+        if (success && path != null) {
             getSnackbarwithAction(mActivity, R.string.snackbar_pdfCreated)
                     .setAction(R.string.snackbar_viewAction, v -> mFileUtils.openFile(path)).show();
             new DatabaseHelper(mActivity).insertRecord(path,

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

@@ -395,13 +395,13 @@ public void onRequestPermissionsResult(int requestCode,
 
     private void onPasswordAdded() {
         mTextEnhancementOptionsEntityArrayList.get(3)
-                .setImage(getResources().getDrawable(R.drawable.baseline_done_24));
+                .setImage(mActivity.getResources().getDrawable(R.drawable.baseline_done_24));
         mTextEnhancementOptionsAdapter.notifyDataSetChanged();
     }
 
     private void onPasswordRemoved() {
         mTextEnhancementOptionsEntityArrayList.get(3)
-                .setImage(getResources().getDrawable(R.drawable.baseline_enhanced_encryption_24));
+                .setImage(mActivity.getResources().getDrawable(R.drawable.baseline_enhanced_encryption_24));
         mTextEnhancementOptionsAdapter.notifyDataSetChanged();
     }
 

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

@@ -80,6 +80,8 @@ private int checkChar(String query , String fileName) {
      */
     public ArrayList<File> getPdfsFromPdfFolder(File[] files) {
         ArrayList<File> pdfFiles = new ArrayList<>();
+        if (files == null)
+            return pdfFiles;
         for (File file : files) {
             if (isPDFAndNotDirectory(file))
                 pdfFiles.add(file);

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

@@ -195,7 +195,6 @@ public void openFile(String path) {
         File file = new File(path);
         Intent target = new Intent(Intent.ACTION_VIEW);
         target.setFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);
-
         try {
             Uri uri = FileProvider.getUriForFile(mContext, AUTHORITY_APP, file);
             target.setDataAndType(uri, mContext.getString(R.string.pdf_type));
@@ -232,6 +231,10 @@ public int checkRepeat(String finalOutputFile, final ArrayList<File> mFile) {
      */
     public String getUriRealPath(Uri uri) {
         String ret;
+
+        if (uri == null)
+            return null;
+
         if (isWhatsappImage(uri.getAuthority())) {
             ret = null;
         } else {