Copy attachments as temporary files before sending

README.md

@@ -125,11 +125,11 @@ export default class App extends Component {
       bccRecipients: ['[email protected]'],
       body: '<b>A Bold Body</b>',
       isHTML: true,
-      attachment: {
+      attachments: [{
         path: '',  // The absolute path of the file from which to read data.
         type: '',   // Mime Type: jpg, png, doc, ppt, html, pdf
         name: '',   // Optional: Custom filename for attachment
-      }
+      }]
     }, (error, event) => {
       Alert.alert(
         error,

android/src/main/java/com/chirag/RNMail/RNMailModule.java

@@ -6,15 +6,17 @@
 import android.net.Uri;
 import android.text.Html;
 
+import com.facebook.react.bridge.Callback;
 import com.facebook.react.bridge.ReactApplicationContext;
 import com.facebook.react.bridge.ReactContextBaseJavaModule;
 import com.facebook.react.bridge.ReactMethod;
-import com.facebook.react.bridge.ReadableMap;
 import com.facebook.react.bridge.ReadableArray;
-import com.facebook.react.bridge.Callback;
+import com.facebook.react.bridge.ReadableMap;
 
-import java.util.List;
 import java.io.File;
+import java.util.ArrayList;
+import java.util.List;
+
 
 /**
  * NativeModule that allows JS to open emails sending apps chooser.
@@ -34,12 +36,11 @@ public String getName() {
   }
 
   /**
-    * Converts a ReadableArray to a String array
-    *
-    * @param r the ReadableArray instance to convert
-    *
-    * @return array of strings
-  */
+   * Converts a ReadableArray to a String array
+   *
+   * @param r the ReadableArray instance to convert
+   * @return array of strings
+   */
   private String[] readableArrayToStringArray(ReadableArray r) {
     int length = r.size();
     String[] strArray = new String[length];
@@ -53,8 +54,9 @@ private String[] readableArrayToStringArray(ReadableArray r) {
 
   @ReactMethod
   public void mail(ReadableMap options, Callback callback) {
-    Intent i = new Intent(Intent.ACTION_SENDTO);
-    i.setData(Uri.parse("mailto:"));
+    Intent i = new Intent(Intent.ACTION_SEND_MULTIPLE);
+    i.setType("message/rfc822");
+
 
     if (options.hasKey("subject") && !options.isNull("subject")) {
       i.putExtra(Intent.EXTRA_SUBJECT, options.getString("subject"));
@@ -78,27 +80,53 @@ public void mail(ReadableMap options, Callback callback) {
       ReadableArray ccRecipients = options.getArray("ccRecipients");
       i.putExtra(Intent.EXTRA_CC, readableArrayToStringArray(ccRecipients));
     }
+
+    if (options.hasKey("bccRecipients") && !options.isNull("bccRecipients")) {
+      ReadableArray bccRecipients = options.getArray("bccRecipients");
+      i.putExtra(Intent.EXTRA_BCC, readableArrayToStringArray(bccRecipients));
+    }
+
     if (options.hasKey("attachments") && !options.isNull("attachments")) {
       ReadableArray r = options.getArray("attachments");
       int length = r.size();
       ArrayList<Uri> uris = new ArrayList<Uri>();
       for (int keyIndex = 0; keyIndex < length; keyIndex++) {
         ReadableMap clip = r.getMap(keyIndex);
-        if (clip.hasKey("path") && !clip.isNull("path")){
+        if (clip.hasKey("path") && !clip.isNull("path")) {
           String path = clip.getString("path");
           File file = new File(path);
-          Uri u = Uri.fromFile(file);
-          uris.add(u);
+
+          String name, suffix = "";
+          if (clip.hasKey("name"))
+            name = clip.getString("name");
+          else
+            name = file.getName();
+
+          if (clip.hasKey("type"))
+            suffix = "." + clip.getString("type");
+
+          File temporaryFile = null;
+          try {
+            temporaryFile = File.createTempFile(name, suffix, reactContext.getExternalCacheDir());
+            copy (file, temporaryFile);
+          } catch (IOException e) {
+            e.printStackTrace();
+            Log.e("RNMail", "Error copying to temporary file");
+          }
+
+          temporaryFile.setReadable(true, false);
+          if (temporaryFile.exists()) {
+            if (temporaryFile.length() == 0)
+              Log.d ("RNMail", "Warning, attaching empty file!");
+            uris.add(Uri.fromFile(temporaryFile));
+          } else {
+            Log.e("RNMail", "Attachment file does not exist");
+          }
         }
       }
       i.putParcelableArrayListExtra(Intent.EXTRA_STREAM, uris);
     }
 
-    if (options.hasKey("bccRecipients") && !options.isNull("bccRecipients")) {
-      ReadableArray bccRecipients = options.getArray("bccRecipients");
-      i.putExtra(Intent.EXTRA_BCC, readableArrayToStringArray(bccRecipients));
-    }
-
     PackageManager manager = reactContext.getPackageManager();
     List<ResolveInfo> list = manager.queryIntentActivities(i, 0);
 
@@ -115,14 +143,33 @@ public void mail(ReadableMap options, Callback callback) {
         callback.invoke("error");
       }
     } else {
-    Intent chooser = Intent.createChooser(i, "Send Mail");
-    chooser.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+      Intent chooser = Intent.createChooser(i, "Send Mail");
+      chooser.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+      try {
+        reactContext.startActivity(chooser);
+      } catch (Exception ex) {
+        callback.invoke("error");
+      }
 
+    }
+  }
+
+  protected static void copy(File src, File dst) throws IOException {
+    InputStream in = new FileInputStream(src);
     try {
-      reactContext.startActivity(chooser);
-    } catch (Exception ex) {
-      callback.invoke("error");
+      OutputStream out = new FileOutputStream(dst);
+      try {
+        // Transfer bytes from in to out
+        byte[] buf = new byte[1024];
+        int len;
+        while ((len = in.read(buf)) > 0) {
+          out.write(buf, 0, len);
+        }
+      } finally {
+        out.close();
+      }
+    } finally {
+      in.close();
     }
   }
 }
-}